Rename scripts to build and add revive command as a new build tool command (#10942)

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
2020-04-04 03:29:12 +08:00 · 2020-04-04 03:29:12 +08:00 · 4f63f283c4
commit 4f63f283c4
parent 4af7c47b38
182 changed files with 15832 additions and 1226 deletions
--- a/.drone.yml
+++ b/.drone.yml
@ -339,7 +339,7 @@ steps:
    pull: default
    image: alpine:3.11
    commands:
-      - ./scripts/update-locales.sh
+      - ./build/update-locales.sh

  - name: push
    pull: always
--- a/.gitattributes
+++ b/.gitattributes
@ -6,5 +6,5 @@ conf/* linguist-vendored
 docker/* linguist-vendored
 options/* linguist-vendored
 public/* linguist-vendored
-scripts/* linguist-vendored
+build/* linguist-vendored
 templates/* linguist-vendored
--- a/7
+++ b/7
@ -80,7 +80,7 @@ TAGS ?=
 TAGS_SPLIT := $(subst $(COMMA), ,$(TAGS))
 TAGS_EVIDENCE := $(MAKE_EVIDENCE_DIR)/tags

-GO_DIRS := cmd integrations models modules routers scripts services vendor
+GO_DIRS := cmd integrations models modules routers build services vendor
 GO_SOURCES := $(wildcard *.go)
 GO_SOURCES += $(shell find $(GO_DIRS) -type f -name "*.go" -not -path modules/options/bindata.go -not -path modules/public/bindata.go -not -path modules/templates/bindata.go)

@ -234,10 +234,7 @@ errcheck:

 .PHONY: revive
 revive:
-	@hash revive > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
-		$(GO) get -u github.com/mgechev/revive; \
-	fi
-	revive -config .revive.toml -exclude=./vendor/... ./... || exit 1
+	GO111MODULE=on $(GO) run -mod=vendor build/lint.go -config .revive.toml -exclude=./vendor/... ./... || exit 1

 .PHONY: misspell-check
 misspell-check:
--- a/scripts/generate-bindata.go
+++ b/scripts/generate-bindata.go
--- a/scripts/generate-gitignores.go
+++ b/scripts/generate-gitignores.go
--- a/scripts/generate-licenses.go
+++ b/scripts/generate-licenses.go
--- a/build/lint.go
+++ b/build/lint.go
@ -0,0 +1,325 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Copyright (c) 2018 Minko Gechev. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/BurntSushi/toml"
+	"github.com/mgechev/dots"
+	"github.com/mgechev/revive/formatter"
+	"github.com/mgechev/revive/lint"
+	"github.com/mgechev/revive/rule"
+	"github.com/mitchellh/go-homedir"
+)
+
+func fail(err string) {
+	fmt.Fprintln(os.Stderr, err)
+	os.Exit(1)
+}
+
+var defaultRules = []lint.Rule{
+	&rule.VarDeclarationsRule{},
+	&rule.PackageCommentsRule{},
+	&rule.DotImportsRule{},
+	&rule.BlankImportsRule{},
+	&rule.ExportedRule{},
+	&rule.VarNamingRule{},
+	&rule.IndentErrorFlowRule{},
+	&rule.IfReturnRule{},
+	&rule.RangeRule{},
+	&rule.ErrorfRule{},
+	&rule.ErrorNamingRule{},
+	&rule.ErrorStringsRule{},
+	&rule.ReceiverNamingRule{},
+	&rule.IncrementDecrementRule{},
+	&rule.ErrorReturnRule{},
+	&rule.UnexportedReturnRule{},
+	&rule.TimeNamingRule{},
+	&rule.ContextKeysType{},
+	&rule.ContextAsArgumentRule{},
+}
+
+var allRules = append([]lint.Rule{
+	&rule.ArgumentsLimitRule{},
+	&rule.CyclomaticRule{},
+	&rule.FileHeaderRule{},
+	&rule.EmptyBlockRule{},
+	&rule.SuperfluousElseRule{},
+	&rule.ConfusingNamingRule{},
+	&rule.GetReturnRule{},
+	&rule.ModifiesParamRule{},
+	&rule.ConfusingResultsRule{},
+	&rule.DeepExitRule{},
+	&rule.UnusedParamRule{},
+	&rule.UnreachableCodeRule{},
+	&rule.AddConstantRule{},
+	&rule.FlagParamRule{},
+	&rule.UnnecessaryStmtRule{},
+	&rule.StructTagRule{},
+	&rule.ModifiesValRecRule{},
+	&rule.ConstantLogicalExprRule{},
+	&rule.BoolLiteralRule{},
+	&rule.RedefinesBuiltinIDRule{},
+	&rule.ImportsBlacklistRule{},
+	&rule.FunctionResultsLimitRule{},
+	&rule.MaxPublicStructsRule{},
+	&rule.RangeValInClosureRule{},
+	&rule.RangeValAddress{},
+	&rule.WaitGroupByValueRule{},
+	&rule.AtomicRule{},
+	&rule.EmptyLinesRule{},
+	&rule.LineLengthLimitRule{},
+	&rule.CallToGCRule{},
+	&rule.DuplicatedImportsRule{},
+	&rule.ImportShadowingRule{},
+	&rule.BareReturnRule{},
+	&rule.UnusedReceiverRule{},
+	&rule.UnhandledErrorRule{},
+	&rule.CognitiveComplexityRule{},
+	&rule.StringOfIntRule{},
+}, defaultRules...)
+
+var allFormatters = []lint.Formatter{
+	&formatter.Stylish{},
+	&formatter.Friendly{},
+	&formatter.JSON{},
+	&formatter.NDJSON{},
+	&formatter.Default{},
+	&formatter.Unix{},
+	&formatter.Checkstyle{},
+	&formatter.Plain{},
+}
+
+func getFormatters() map[string]lint.Formatter {
+	result := map[string]lint.Formatter{}
+	for _, f := range allFormatters {
+		result[f.Name()] = f
+	}
+	return result
+}
+
+func getLintingRules(config *lint.Config) []lint.Rule {
+	rulesMap := map[string]lint.Rule{}
+	for _, r := range allRules {
+		rulesMap[r.Name()] = r
+	}
+
+	lintingRules := []lint.Rule{}
+	for name := range config.Rules {
+		rule, ok := rulesMap[name]
+		if !ok {
+			fail("cannot find rule: " + name)
+		}
+		lintingRules = append(lintingRules, rule)
+	}
+
+	return lintingRules
+}
+
+func parseConfig(path string) *lint.Config {
+	config := &lint.Config{}
+	file, err := ioutil.ReadFile(path)
+	if err != nil {
+		fail("cannot read the config file")
+	}
+	_, err = toml.Decode(string(file), config)
+	if err != nil {
+		fail("cannot parse the config file: " + err.Error())
+	}
+	return config
+}
+
+func normalizeConfig(config *lint.Config) {
+	if config.Confidence == 0 {
+		config.Confidence = 0.8
+	}
+	severity := config.Severity
+	if severity != "" {
+		for k, v := range config.Rules {
+			if v.Severity == "" {
+				v.Severity = severity
+			}
+			config.Rules[k] = v
+		}
+		for k, v := range config.Directives {
+			if v.Severity == "" {
+				v.Severity = severity
+			}
+			config.Directives[k] = v
+		}
+	}
+}
+
+func getConfig() *lint.Config {
+	config := defaultConfig()
+	if configPath != "" {
+		config = parseConfig(configPath)
+	}
+	normalizeConfig(config)
+	return config
+}
+
+func getFormatter() lint.Formatter {
+	formatters := getFormatters()
+	formatter := formatters["default"]
+	if formatterName != "" {
+		f, ok := formatters[formatterName]
+		if !ok {
+			fail("unknown formatter " + formatterName)
+		}
+		formatter = f
+	}
+	return formatter
+}
+
+func buildDefaultConfigPath() string {
+	var result string
+	if homeDir, err := homedir.Dir(); err == nil {
+		result = filepath.Join(homeDir, "revive.toml")
+		if _, err := os.Stat(result); err != nil {
+			result = ""
+		}
+	}
+
+	return result
+}
+
+func defaultConfig() *lint.Config {
+	defaultConfig := lint.Config{
+		Confidence: 0.0,
+		Severity:   lint.SeverityWarning,
+		Rules:      map[string]lint.RuleConfig{},
+	}
+	for _, r := range defaultRules {
+		defaultConfig.Rules[r.Name()] = lint.RuleConfig{}
+	}
+	return &defaultConfig
+}
+
+func normalizeSplit(strs []string) []string {
+	res := []string{}
+	for _, s := range strs {
+		t := strings.Trim(s, " \t")
+		if len(t) > 0 {
+			res = append(res, t)
+		}
+	}
+	return res
+}
+
+func getPackages() [][]string {
+	globs := normalizeSplit(flag.Args())
+	if len(globs) == 0 {
+		globs = append(globs, ".")
+	}
+
+	packages, err := dots.ResolvePackages(globs, normalizeSplit(excludePaths))
+	if err != nil {
+		fail(err.Error())
+	}
+
+	return packages
+}
+
+type arrayFlags []string
+
+func (i *arrayFlags) String() string {
+	return strings.Join([]string(*i), " ")
+}
+
+func (i *arrayFlags) Set(value string) error {
+	*i = append(*i, value)
+	return nil
+}
+
+var configPath string
+var excludePaths arrayFlags
+var formatterName string
+var help bool
+
+var originalUsage = flag.Usage
+
+func init() {
+	flag.Usage = func() {
+		originalUsage()
+	}
+	// command line help strings
+	const (
+		configUsage    = "path to the configuration TOML file, defaults to $HOME/revive.toml, if present (i.e. -config myconf.toml)"
+		excludeUsage   = "list of globs which specify files to be excluded (i.e. -exclude foo/...)"
+		formatterUsage = "formatter to be used for the output (i.e. -formatter stylish)"
+	)
+
+	defaultConfigPath := buildDefaultConfigPath()
+
+	flag.StringVar(&configPath, "config", defaultConfigPath, configUsage)
+	flag.Var(&excludePaths, "exclude", excludeUsage)
+	flag.StringVar(&formatterName, "formatter", "", formatterUsage)
+	flag.Parse()
+}
+
+func main() {
+	config := getConfig()
+	formatter := getFormatter()
+	packages := getPackages()
+
+	revive := lint.New(func(file string) ([]byte, error) {
+		return ioutil.ReadFile(file)
+	})
+
+	lintingRules := getLintingRules(config)
+
+	failures, err := revive.Lint(packages, lintingRules, *config)
+	if err != nil {
+		fail(err.Error())
+	}
+
+	formatChan := make(chan lint.Failure)
+	exitChan := make(chan bool)
+
+	var output string
+	go (func() {
+		output, err = formatter.Format(formatChan, *config)
+		if err != nil {
+			fail(err.Error())
+		}
+		exitChan <- true
+	})()
+
+	exitCode := 0
+	for f := range failures {
+		if f.Confidence < config.Confidence {
+			continue
+		}
+		if exitCode == 0 {
+			exitCode = config.WarningCode
+		}
+		if c, ok := config.Rules[f.RuleName]; ok && c.Severity == lint.SeverityError {
+			exitCode = config.ErrorCode
+		}
+		if c, ok := config.Directives[f.RuleName]; ok && c.Severity == lint.SeverityError {
+			exitCode = config.ErrorCode
+		}
+
+		formatChan <- f
+	}
+
+	close(formatChan)
+	<-exitChan
+	if output != "" {
+		fmt.Println(output)
+	}
+
+	os.Exit(exitCode)
+}
--- a/scripts/update-locales.sh
+++ b/scripts/update-locales.sh
--- a/build/vendor.go
+++ b/build/vendor.go
@ -0,0 +1,18 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package build
+
+import (
+	// for lint
+	_ "github.com/BurntSushi/toml"
+	_ "github.com/mgechev/dots"
+	_ "github.com/mgechev/revive/formatter"
+	_ "github.com/mgechev/revive/lint"
+	_ "github.com/mgechev/revive/rule"
+	_ "github.com/mitchellh/go-homedir"
+
+	// for embed
+	_ "github.com/shurcooL/vfsgen"
+)
--- a/go.mod
+++ b/go.mod
@ -16,6 +16,7 @@ require (
 	gitea.com/macaron/macaron v1.4.0
 	gitea.com/macaron/session v0.0.0-20191207215012-613cebf0674d
 	gitea.com/macaron/toolbox v0.0.0-20190822013122-05ff0fc766b7
+	github.com/BurntSushi/toml v0.3.1
 	github.com/PuerkitoBio/goquery v1.5.0
 	github.com/RoaringBitmap/roaring v0.4.21 // indirect
 	github.com/bgentry/speakeasy v0.1.0 // indirect
@ -67,17 +68,20 @@ require (
 	github.com/lunny/dingtalk_webhook v0.0.0-20171025031554-e3534c89ef96
 	github.com/mailru/easyjson v0.7.0 // indirect
 	github.com/markbates/goth v1.61.2
-	github.com/mattn/go-isatty v0.0.7
+	github.com/mattn/go-isatty v0.0.11
 	github.com/mattn/go-oci8 v0.0.0-20190320171441-14ba190cf52d // indirect
 	github.com/mattn/go-sqlite3 v1.11.0
 	github.com/mcuadros/go-version v0.0.0-20190308113854-92cdf37c5b75
+	github.com/mgechev/dots v0.0.0-20190921121421-c36f7dcfbb81
+	github.com/mgechev/revive v1.0.2
 	github.com/microcosm-cc/bluemonday v0.0.0-20161012083705-f77f16ffc87a
+	github.com/mitchellh/go-homedir v1.1.0
 	github.com/msteinert/pam v0.0.0-20151204160544-02ccfbfaf0cc
 	github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5
 	github.com/niklasfasching/go-org v0.1.9
 	github.com/oliamb/cutter v0.2.2
 	github.com/olivere/elastic/v7 v7.0.9
-	github.com/pkg/errors v0.8.1
+	github.com/pkg/errors v0.9.1
 	github.com/pquerna/otp v0.0.0-20160912161815-54653902c20e
 	github.com/prometheus/client_golang v1.1.0
 	github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 // indirect
@ -107,7 +111,6 @@ require (
 	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45
 	golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527
 	golang.org/x/text v0.3.2
-	golang.org/x/tools v0.0.0-20191213221258-04c2e8eff935 // indirect
 	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
 	gopkg.in/asn1-ber.v1 v1.0.0-20150924051756-4e86f4367175 // indirect
 	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df
--- a/go.sum
+++ b/go.sum
@ -157,6 +157,10 @@ github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 h1:JWuenKqqX8nojt
 github.com/facebookgo/stack v0.0.0-20160209184415-751773369052/go.mod h1:UbMTZqLaRiH3MsBH8va0n7s1pQYcu3uTb8G4tygF4Zg=
 github.com/facebookgo/subset v0.0.0-20150612182917-8dac2c3c4870 h1:E2s37DuLxFhQDg5gKsWoLBOB0n+ZW8s599zru8FJ2/Y=
 github.com/facebookgo/subset v0.0.0-20150612182917-8dac2c3c4870/go.mod h1:5tD+neXqOorC30/tWg0LCSkrqj/AR6gu8yY8/fpw1q0=
+github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
+github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
+github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
+github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
 github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568 h1:BHsljHzVlRcyQhjrss6TZTdY2VfCqZPbv5k3iBFa2ZQ=
 github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
 github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8vw=
@ -184,6 +188,7 @@ github.com/go-git/go-git/v5 v5.0.0/go.mod h1:oYD8y9kWsGINPFJoLdaScGCN6dlKg23blmC
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
+github.com/go-logr/logr v0.1.0/go.mod h1:ixOQHD9gLJUVQQ2ZOR7zLEifBX6tGkNJF4QyIY7sIas=
 github.com/go-openapi/analysis v0.0.0-20180825180245-b006789cd277/go.mod h1:k70tL6pCuVxPJOHXQ+wIac1FUrvNkHolPie/cLEU6hI=
 github.com/go-openapi/analysis v0.17.0/go.mod h1:IowGgpVeD0vNm45So8nr+IcQ3pxVtpRoBWb8PVZO0ik=
 github.com/go-openapi/analysis v0.18.0/go.mod h1:IowGgpVeD0vNm45So8nr+IcQ3pxVtpRoBWb8PVZO0ik=
@ -399,10 +404,15 @@ github.com/mailru/easyjson v0.7.0/go.mod h1:KAzv3t3aY1NaHWoQz1+4F1ccyAH66Jk7yos7
 github.com/markbates/going v1.0.0/go.mod h1:I6mnB4BPnEeqo85ynXIx1ZFLLbtiLHNXVgWeFO9OGOA=
 github.com/markbates/goth v1.61.2 h1:jDowrUH5qw8KGuQdKwFhLzkXkTYCIPfz3LHADJsiPIs=
 github.com/markbates/goth v1.61.2/go.mod h1:qh2QfwZoWRucQ+DR5KVKC6dUGkNCToWh4vS45GIzFsY=
-github.com/mattn/go-isatty v0.0.7 h1:UvyT9uN+3r7yLEYSlJsbQGdsaB/a0DlgWP3pql6iwOc=
-github.com/mattn/go-isatty v0.0.7/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
+github.com/mattn/go-colorable v0.1.4 h1:snbPLB8fVfU9iwbbo30TPtbLRzwWu6aJS6Xh4eaaviA=
+github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
+github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
+github.com/mattn/go-isatty v0.0.11 h1:FxPOTFNqGkuDUGi3H/qkUbQO4ZiBa2brKq5r0l8TGeM=
+github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOAqxQCu2WE=
 github.com/mattn/go-oci8 v0.0.0-20190320171441-14ba190cf52d h1:m+dSK37rFf2fqppZhg15yI2IwC9BtucBiRwSDm9VL8g=
 github.com/mattn/go-oci8 v0.0.0-20190320171441-14ba190cf52d/go.mod h1:/M9VLO+lUPmxvoOK2PfWRZ8mTtB4q1Hy9lEGijv9Nr8=
+github.com/mattn/go-runewidth v0.0.7 h1:Ei8KR0497xHyKJPAv59M1dkC+rOZCMBJ+t3fZ+twI54=
+github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
 github.com/mattn/go-sqlite3 v1.11.0 h1:LDdKkqtYlom37fkvqs8rMPFKAMe8+SgjbwZ6ex1/A/Q=
 github.com/mattn/go-sqlite3 v1.11.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
@ -410,6 +420,10 @@ github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0j
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/mcuadros/go-version v0.0.0-20190308113854-92cdf37c5b75 h1:Pijfgr7ZuvX7QIQiEwLdRVr3RoMG+i0SbBO1Qu+7yVk=
 github.com/mcuadros/go-version v0.0.0-20190308113854-92cdf37c5b75/go.mod h1:76rfSfYPWj01Z85hUf/ituArm797mNKcvINh1OlsZKo=
+github.com/mgechev/dots v0.0.0-20190921121421-c36f7dcfbb81 h1:QASJXOGm2RZ5Ardbc86qNFvby9AqkLDibfChMtAg5QM=
+github.com/mgechev/dots v0.0.0-20190921121421-c36f7dcfbb81/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
+github.com/mgechev/revive v1.0.2 h1:v0NxxQ7fSFz/u1NQydPo6EGdq7va0J1BtsZmae6kzUg=
+github.com/mgechev/revive v1.0.2/go.mod h1:rb0dQy1LVAxW9SWy5R3LPUjevzUbUS316U5MFySA2lo=
 github.com/microcosm-cc/bluemonday v0.0.0-20161012083705-f77f16ffc87a h1:d18LCO3ctH2kugUqt0pEyKKP8L+IYrocaPqGFilhTKk=
 github.com/microcosm-cc/bluemonday v0.0.0-20161012083705-f77f16ffc87a/go.mod h1:hsXNsILzKxV+sX77C5b8FSuKF00vh2OMYv+xgHpAMF4=
 github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
@ -434,6 +448,8 @@ github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLA
 github.com/niklasfasching/go-org v0.1.9 h1:Toz8WMIt+qJb52uYEk1YD/muLuOOmRt1CfkV+bKVMkI=
 github.com/niklasfasching/go-org v0.1.9/go.mod h1:AsLD6X7djzRIz4/RFZu8vwRL0VGjUvGZCCH1Nz0VdrU=
 github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
+github.com/olekukonko/tablewriter v0.0.4 h1:vHD/YYe1Wolo78koG299f7V/VAS08c6IpCLn+Ejf/w8=
+github.com/olekukonko/tablewriter v0.0.4/go.mod h1:zq6QwlOf5SlnkVbMSr5EoBv3636FWnp+qbPhuoO21uA=
 github.com/oliamb/cutter v0.2.2 h1:Lfwkya0HHNU1YLnGv2hTkzHfasrSMkgv4Dn+5rmlk3k=
 github.com/oliamb/cutter v0.2.2/go.mod h1:4BenG2/4GuRBDbVm/OPahDVqbrOemzpPiG5mi1iryBU=
 github.com/olivere/elastic/v7 v7.0.9 h1:+bTR1xJbfLYD8WnTBt9672mFlKxjfWRJpEQ1y8BMS3g=
@ -457,6 +473,8 @@ github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35/go.mod h1:prYjPmNq4d1NPVmpShWobRqXY3q7Vp+80DqgxxUrUIA=
@ -631,6 +649,7 @@ golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTk
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee h1:WG0RUwxtNT4qqaXX3DPA8zHFNm/D9xaBpxzHt1WcA/E=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@ -690,6 +709,7 @@ golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190907184412-d223b2b6db03/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47 h1:/XfQ9z7ib8eEJX2hdgFTZJ/ntt0swNk5oYBziWeTCvY=
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527 h1:uYVVQ9WP/Ds2ROhcaGPeIdVq0RIXVLwsHlnvJ+cT1So=
 golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@ -714,9 +734,10 @@ golang.org/x/tools v0.0.0-20190614205625-5aca471b1d59/go.mod h1:/rFqwRUd4F7ZHNgw
 golang.org/x/tools v0.0.0-20190617190820-da514acc4774/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
 golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
 golang.org/x/tools v0.0.0-20190907020128-2ca718005c18/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191213221258-04c2e8eff935 h1:kJQZhwFzSwJS2BxboKjdZzWczQOZx8VuH7Y8hhuGUtM=
-golang.org/x/tools v0.0.0-20191213221258-04c2e8eff935/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200225230052-807dcd883420 h1:4RJNOV+2rLxMEfr6QIpC7GEv9MjD6ApGXTCLrNF9+eA=
+golang.org/x/tools v0.0.0-20200225230052-807dcd883420/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898 h1:/atklqdjdhuosWIl6AIbOeHJjicWYPqR9bpxqxYG2pA=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
@ -788,6 +809,7 @@ honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
 mvdan.cc/xurls/v2 v2.1.0 h1:KaMb5GLhlcSX+e+qhbRJODnUUBvlw01jt4yrjFIHAuA=
 mvdan.cc/xurls/v2 v2.1.0/go.mod h1:5GrSd9rOnKOpZaji1OZLYL/yeAAtGDlo/cFe+8K5n8E=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
--- a/main.go
+++ b/main.go
@ -21,8 +21,8 @@ import (
 	_ "code.gitea.io/gitea/modules/markup/markdown"
 	_ "code.gitea.io/gitea/modules/markup/orgmode"

-	// for embed
-	_ "github.com/shurcooL/vfsgen"
+	// for build
+	_ "code.gitea.io/gitea/build"

 	"github.com/urfave/cli"
 )
--- a/modules/options/options_bindata.go
+++ b/modules/options/options_bindata.go
@ -6,4 +6,4 @@

 package options

-//go:generate go run -mod=vendor ../../scripts/generate-bindata.go ../../options options bindata.go
+//go:generate go run -mod=vendor ../../build/generate-bindata.go ../../options options bindata.go
--- a/modules/public/public_bindata.go
+++ b/modules/public/public_bindata.go
@ -6,4 +6,4 @@

 package public

-//go:generate go run -mod=vendor  ../../scripts/generate-bindata.go ../../public public bindata.go
+//go:generate go run -mod=vendor  ../../build/generate-bindata.go ../../public public bindata.go
--- a/modules/templates/templates_bindata.go
+++ b/modules/templates/templates_bindata.go
@ -6,4 +6,4 @@

 package templates

-//go:generate go run -mod=vendor ../../scripts/generate-bindata.go ../../templates templates bindata.go
+//go:generate go run -mod=vendor ../../build/generate-bindata.go ../../templates templates bindata.go
--- a/vendor/github.com/fatih/color/LICENSE.md
+++ b/vendor/github.com/fatih/color/LICENSE.md
@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Fatih Arslan
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--- a/vendor/github.com/fatih/color/README.md
+++ b/vendor/github.com/fatih/color/README.md
@ -0,0 +1,182 @@
+# Archived project. No maintenance. 
+
+This project is not maintained anymore and is archived. Feel free to fork and
+make your own changes if needed. For more detail read my blog post: [Taking an indefinite sabbatical from my projects](https://arslan.io/2018/10/09/taking-an-indefinite-sabbatical-from-my-projects/)
+
+Thanks to everyone for their valuable feedback and contributions.
+
+
+# Color [![GoDoc](https://godoc.org/github.com/fatih/color?status.svg)](https://godoc.org/github.com/fatih/color) 
+
+Color lets you use colorized outputs in terms of [ANSI Escape
+Codes](http://en.wikipedia.org/wiki/ANSI_escape_code#Colors) in Go (Golang). It
+has support for Windows too! The API can be used in several ways, pick one that
+suits you.
+
+
+![Color](https://i.imgur.com/c1JI0lA.png)
+
+
+## Install
+
+```bash
+go get github.com/fatih/color
+```
+
+## Examples
+
+### Standard colors
+
+```go
+// Print with default helper functions
+color.Cyan("Prints text in cyan.")
+
+// A newline will be appended automatically
+color.Blue("Prints %s in blue.", "text")
+
+// These are using the default foreground colors
+color.Red("We have red")
+color.Magenta("And many others ..")
+
+```
+
+### Mix and reuse colors
+
+```go
+// Create a new color object
+c := color.New(color.FgCyan).Add(color.Underline)
+c.Println("Prints cyan text with an underline.")
+
+// Or just add them to New()
+d := color.New(color.FgCyan, color.Bold)
+d.Printf("This prints bold cyan %s\n", "too!.")
+
+// Mix up foreground and background colors, create new mixes!
+red := color.New(color.FgRed)
+
+boldRed := red.Add(color.Bold)
+boldRed.Println("This will print text in bold red.")
+
+whiteBackground := red.Add(color.BgWhite)
+whiteBackground.Println("Red text with white background.")
+```
+
+### Use your own output (io.Writer)
+
+```go
+// Use your own io.Writer output
+color.New(color.FgBlue).Fprintln(myWriter, "blue color!")
+
+blue := color.New(color.FgBlue)
+blue.Fprint(writer, "This will print text in blue.")
+```
+
+### Custom print functions (PrintFunc)
+
+```go
+// Create a custom print function for convenience
+red := color.New(color.FgRed).PrintfFunc()
+red("Warning")
+red("Error: %s", err)
+
+// Mix up multiple attributes
+notice := color.New(color.Bold, color.FgGreen).PrintlnFunc()
+notice("Don't forget this...")
+```
+
+### Custom fprint functions (FprintFunc)
+
+```go
+blue := color.New(FgBlue).FprintfFunc()
+blue(myWriter, "important notice: %s", stars)
+
+// Mix up with multiple attributes
+success := color.New(color.Bold, color.FgGreen).FprintlnFunc()
+success(myWriter, "Don't forget this...")
+```
+
+### Insert into noncolor strings (SprintFunc)
+
+```go
+// Create SprintXxx functions to mix strings with other non-colorized strings:
+yellow := color.New(color.FgYellow).SprintFunc()
+red := color.New(color.FgRed).SprintFunc()
+fmt.Printf("This is a %s and this is %s.\n", yellow("warning"), red("error"))
+
+info := color.New(color.FgWhite, color.BgGreen).SprintFunc()
+fmt.Printf("This %s rocks!\n", info("package"))
+
+// Use helper functions
+fmt.Println("This", color.RedString("warning"), "should be not neglected.")
+fmt.Printf("%v %v\n", color.GreenString("Info:"), "an important message.")
+
+// Windows supported too! Just don't forget to change the output to color.Output
+fmt.Fprintf(color.Output, "Windows support: %s", color.GreenString("PASS"))
+```
+
+### Plug into existing code
+
+```go
+// Use handy standard colors
+color.Set(color.FgYellow)
+
+fmt.Println("Existing text will now be in yellow")
+fmt.Printf("This one %s\n", "too")
+
+color.Unset() // Don't forget to unset
+
+// You can mix up parameters
+color.Set(color.FgMagenta, color.Bold)
+defer color.Unset() // Use it in your function
+
+fmt.Println("All text will now be bold magenta.")
+```
+
+### Disable/Enable color
+ 
+There might be a case where you want to explicitly disable/enable color output. the 
+`go-isatty` package will automatically disable color output for non-tty output streams 
+(for example if the output were piped directly to `less`)
+
+`Color` has support to disable/enable colors both globally and for single color 
+definitions. For example suppose you have a CLI app and a `--no-color` bool flag. You 
+can easily disable the color output with:
+
+```go
+
+var flagNoColor = flag.Bool("no-color", false, "Disable color output")
+
+if *flagNoColor {
+	color.NoColor = true // disables colorized output
+}
+```
+
+It also has support for single color definitions (local). You can
+disable/enable color output on the fly:
+
+```go
+c := color.New(color.FgCyan)
+c.Println("Prints cyan text")
+
+c.DisableColor()
+c.Println("This is printed without any color")
+
+c.EnableColor()
+c.Println("This prints again cyan...")
+```
+
+## Todo
+
+* Save/Return previous values
+* Evaluate fmt.Formatter interface
+
+
+## Credits
+
+ * [Fatih Arslan](https://github.com/fatih)
+ * Windows support via @mattn: [colorable](https://github.com/mattn/go-colorable)
+
+## License
+
+The MIT License (MIT) - see [`LICENSE.md`](https://github.com/fatih/color/blob/master/LICENSE.md) for more details
+
--- a/vendor/github.com/fatih/color/color.go
+++ b/vendor/github.com/fatih/color/color.go
@ -0,0 +1,603 @@
+package color
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/mattn/go-colorable"
+	"github.com/mattn/go-isatty"
+)
+
+var (
+	// NoColor defines if the output is colorized or not. It's dynamically set to
+	// false or true based on the stdout's file descriptor referring to a terminal
+	// or not. This is a global option and affects all colors. For more control
+	// over each color block use the methods DisableColor() individually.
+	NoColor = os.Getenv("TERM") == "dumb" ||
+		(!isatty.IsTerminal(os.Stdout.Fd()) && !isatty.IsCygwinTerminal(os.Stdout.Fd()))
+
+	// Output defines the standard output of the print functions. By default
+	// os.Stdout is used.
+	Output = colorable.NewColorableStdout()
+
+	// Error defines a color supporting writer for os.Stderr.
+	Error = colorable.NewColorableStderr()
+
+	// colorsCache is used to reduce the count of created Color objects and
+	// allows to reuse already created objects with required Attribute.
+	colorsCache   = make(map[Attribute]*Color)
+	colorsCacheMu sync.Mutex // protects colorsCache
+)
+
+// Color defines a custom color object which is defined by SGR parameters.
+type Color struct {
+	params  []Attribute
+	noColor *bool
+}
+
+// Attribute defines a single SGR Code
+type Attribute int
+
+const escape = "\x1b"
+
+// Base attributes
+const (
+	Reset Attribute = iota
+	Bold
+	Faint
+	Italic
+	Underline
+	BlinkSlow
+	BlinkRapid
+	ReverseVideo
+	Concealed
+	CrossedOut
+)
+
+// Foreground text colors
+const (
+	FgBlack Attribute = iota + 30
+	FgRed
+	FgGreen
+	FgYellow
+	FgBlue
+	FgMagenta
+	FgCyan
+	FgWhite
+)
+
+// Foreground Hi-Intensity text colors
+const (
+	FgHiBlack Attribute = iota + 90
+	FgHiRed
+	FgHiGreen
+	FgHiYellow
+	FgHiBlue
+	FgHiMagenta
+	FgHiCyan
+	FgHiWhite
+)
+
+// Background text colors
+const (
+	BgBlack Attribute = iota + 40
+	BgRed
+	BgGreen
+	BgYellow
+	BgBlue
+	BgMagenta
+	BgCyan
+	BgWhite
+)
+
+// Background Hi-Intensity text colors
+const (
+	BgHiBlack Attribute = iota + 100
+	BgHiRed
+	BgHiGreen
+	BgHiYellow
+	BgHiBlue
+	BgHiMagenta
+	BgHiCyan
+	BgHiWhite
+)
+
+// New returns a newly created color object.
+func New(value ...Attribute) *Color {
+	c := &Color{params: make([]Attribute, 0)}
+	c.Add(value...)
+	return c
+}
+
+// Set sets the given parameters immediately. It will change the color of
+// output with the given SGR parameters until color.Unset() is called.
+func Set(p ...Attribute) *Color {
+	c := New(p...)
+	c.Set()
+	return c
+}
+
+// Unset resets all escape attributes and clears the output. Usually should
+// be called after Set().
+func Unset() {
+	if NoColor {
+		return
+	}
+
+	fmt.Fprintf(Output, "%s[%dm", escape, Reset)
+}
+
+// Set sets the SGR sequence.
+func (c *Color) Set() *Color {
+	if c.isNoColorSet() {
+		return c
+	}
+
+	fmt.Fprintf(Output, c.format())
+	return c
+}
+
+func (c *Color) unset() {
+	if c.isNoColorSet() {
+		return
+	}
+
+	Unset()
+}
+
+func (c *Color) setWriter(w io.Writer) *Color {
+	if c.isNoColorSet() {
+		return c
+	}
+
+	fmt.Fprintf(w, c.format())
+	return c
+}
+
+func (c *Color) unsetWriter(w io.Writer) {
+	if c.isNoColorSet() {
+		return
+	}
+
+	if NoColor {
+		return
+	}
+
+	fmt.Fprintf(w, "%s[%dm", escape, Reset)
+}
+
+// Add is used to chain SGR parameters. Use as many as parameters to combine
+// and create custom color objects. Example: Add(color.FgRed, color.Underline).
+func (c *Color) Add(value ...Attribute) *Color {
+	c.params = append(c.params, value...)
+	return c
+}
+
+func (c *Color) prepend(value Attribute) {
+	c.params = append(c.params, 0)
+	copy(c.params[1:], c.params[0:])
+	c.params[0] = value
+}
+
+// Fprint formats using the default formats for its operands and writes to w.
+// Spaces are added between operands when neither is a string.
+// It returns the number of bytes written and any write error encountered.
+// On Windows, users should wrap w with colorable.NewColorable() if w is of
+// type *os.File.
+func (c *Color) Fprint(w io.Writer, a ...interface{}) (n int, err error) {
+	c.setWriter(w)
+	defer c.unsetWriter(w)
+
+	return fmt.Fprint(w, a...)
+}
+
+// Print formats using the default formats for its operands and writes to
+// standard output. Spaces are added between operands when neither is a
+// string. It returns the number of bytes written and any write error
+// encountered. This is the standard fmt.Print() method wrapped with the given
+// color.
+func (c *Color) Print(a ...interface{}) (n int, err error) {
+	c.Set()
+	defer c.unset()
+
+	return fmt.Fprint(Output, a...)
+}
+
+// Fprintf formats according to a format specifier and writes to w.
+// It returns the number of bytes written and any write error encountered.
+// On Windows, users should wrap w with colorable.NewColorable() if w is of
+// type *os.File.
+func (c *Color) Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
+	c.setWriter(w)
+	defer c.unsetWriter(w)
+
+	return fmt.Fprintf(w, format, a...)
+}
+
+// Printf formats according to a format specifier and writes to standard output.
+// It returns the number of bytes written and any write error encountered.
+// This is the standard fmt.Printf() method wrapped with the given color.
+func (c *Color) Printf(format string, a ...interface{}) (n int, err error) {
+	c.Set()
+	defer c.unset()
+
+	return fmt.Fprintf(Output, format, a...)
+}
+
+// Fprintln formats using the default formats for its operands and writes to w.
+// Spaces are always added between operands and a newline is appended.
+// On Windows, users should wrap w with colorable.NewColorable() if w is of
+// type *os.File.
+func (c *Color) Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
+	c.setWriter(w)
+	defer c.unsetWriter(w)
+
+	return fmt.Fprintln(w, a...)
+}
+
+// Println formats using the default formats for its operands and writes to
+// standard output. Spaces are always added between operands and a newline is
+// appended. It returns the number of bytes written and any write error
+// encountered. This is the standard fmt.Print() method wrapped with the given
+// color.
+func (c *Color) Println(a ...interface{}) (n int, err error) {
+	c.Set()
+	defer c.unset()
+
+	return fmt.Fprintln(Output, a...)
+}
+
+// Sprint is just like Print, but returns a string instead of printing it.
+func (c *Color) Sprint(a ...interface{}) string {
+	return c.wrap(fmt.Sprint(a...))
+}
+
+// Sprintln is just like Println, but returns a string instead of printing it.
+func (c *Color) Sprintln(a ...interface{}) string {
+	return c.wrap(fmt.Sprintln(a...))
+}
+
+// Sprintf is just like Printf, but returns a string instead of printing it.
+func (c *Color) Sprintf(format string, a ...interface{}) string {
+	return c.wrap(fmt.Sprintf(format, a...))
+}
+
+// FprintFunc returns a new function that prints the passed arguments as
+// colorized with color.Fprint().
+func (c *Color) FprintFunc() func(w io.Writer, a ...interface{}) {
+	return func(w io.Writer, a ...interface{}) {
+		c.Fprint(w, a...)
+	}
+}
+
+// PrintFunc returns a new function that prints the passed arguments as
+// colorized with color.Print().
+func (c *Color) PrintFunc() func(a ...interface{}) {
+	return func(a ...interface{}) {
+		c.Print(a...)
+	}
+}
+
+// FprintfFunc returns a new function that prints the passed arguments as
+// colorized with color.Fprintf().
+func (c *Color) FprintfFunc() func(w io.Writer, format string, a ...interface{}) {
+	return func(w io.Writer, format string, a ...interface{}) {
+		c.Fprintf(w, format, a...)
+	}
+}
+
+// PrintfFunc returns a new function that prints the passed arguments as
+// colorized with color.Printf().
+func (c *Color) PrintfFunc() func(format string, a ...interface{}) {
+	return func(format string, a ...interface{}) {
+		c.Printf(format, a...)
+	}
+}
+
+// FprintlnFunc returns a new function that prints the passed arguments as
+// colorized with color.Fprintln().
+func (c *Color) FprintlnFunc() func(w io.Writer, a ...interface{}) {
+	return func(w io.Writer, a ...interface{}) {
+		c.Fprintln(w, a...)
+	}
+}
+
+// PrintlnFunc returns a new function that prints the passed arguments as
+// colorized with color.Println().
+func (c *Color) PrintlnFunc() func(a ...interface{}) {
+	return func(a ...interface{}) {
+		c.Println(a...)
+	}
+}
+
+// SprintFunc returns a new function that returns colorized strings for the
+// given arguments with fmt.Sprint(). Useful to put into or mix into other
+// string. Windows users should use this in conjunction with color.Output, example:
+//
+//	put := New(FgYellow).SprintFunc()
+//	fmt.Fprintf(color.Output, "This is a %s", put("warning"))
+func (c *Color) SprintFunc() func(a ...interface{}) string {
+	return func(a ...interface{}) string {
+		return c.wrap(fmt.Sprint(a...))
+	}
+}
+
+// SprintfFunc returns a new function that returns colorized strings for the
+// given arguments with fmt.Sprintf(). Useful to put into or mix into other
+// string. Windows users should use this in conjunction with color.Output.
+func (c *Color) SprintfFunc() func(format string, a ...interface{}) string {
+	return func(format string, a ...interface{}) string {
+		return c.wrap(fmt.Sprintf(format, a...))
+	}
+}
+
+// SprintlnFunc returns a new function that returns colorized strings for the
+// given arguments with fmt.Sprintln(). Useful to put into or mix into other
+// string. Windows users should use this in conjunction with color.Output.
+func (c *Color) SprintlnFunc() func(a ...interface{}) string {
+	return func(a ...interface{}) string {
+		return c.wrap(fmt.Sprintln(a...))
+	}
+}
+
+// sequence returns a formatted SGR sequence to be plugged into a "\x1b[...m"
+// an example output might be: "1;36" -> bold cyan
+func (c *Color) sequence() string {
+	format := make([]string, len(c.params))
+	for i, v := range c.params {
+		format[i] = strconv.Itoa(int(v))
+	}
+
+	return strings.Join(format, ";")
+}
+
+// wrap wraps the s string with the colors attributes. The string is ready to
+// be printed.
+func (c *Color) wrap(s string) string {
+	if c.isNoColorSet() {
+		return s
+	}
+
+	return c.format() + s + c.unformat()
+}
+
+func (c *Color) format() string {
+	return fmt.Sprintf("%s[%sm", escape, c.sequence())
+}
+
+func (c *Color) unformat() string {
+	return fmt.Sprintf("%s[%dm", escape, Reset)
+}
+
+// DisableColor disables the color output. Useful to not change any existing
+// code and still being able to output. Can be used for flags like
+// "--no-color". To enable back use EnableColor() method.
+func (c *Color) DisableColor() {
+	c.noColor = boolPtr(true)
+}
+
+// EnableColor enables the color output. Use it in conjunction with
+// DisableColor(). Otherwise this method has no side effects.
+func (c *Color) EnableColor() {
+	c.noColor = boolPtr(false)
+}
+
+func (c *Color) isNoColorSet() bool {
+	// check first if we have user setted action
+	if c.noColor != nil {
+		return *c.noColor
+	}
+
+	// if not return the global option, which is disabled by default
+	return NoColor
+}
+
+// Equals returns a boolean value indicating whether two colors are equal.
+func (c *Color) Equals(c2 *Color) bool {
+	if len(c.params) != len(c2.params) {
+		return false
+	}
+
+	for _, attr := range c.params {
+		if !c2.attrExists(attr) {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (c *Color) attrExists(a Attribute) bool {
+	for _, attr := range c.params {
+		if attr == a {
+			return true
+		}
+	}
+
+	return false
+}
+
+func boolPtr(v bool) *bool {
+	return &v
+}
+
+func getCachedColor(p Attribute) *Color {
+	colorsCacheMu.Lock()
+	defer colorsCacheMu.Unlock()
+
+	c, ok := colorsCache[p]
+	if !ok {
+		c = New(p)
+		colorsCache[p] = c
+	}
+
+	return c
+}
+
+func colorPrint(format string, p Attribute, a ...interface{}) {
+	c := getCachedColor(p)
+
+	if !strings.HasSuffix(format, "\n") {
+		format += "\n"
+	}
+
+	if len(a) == 0 {
+		c.Print(format)
+	} else {
+		c.Printf(format, a...)
+	}
+}
+
+func colorString(format string, p Attribute, a ...interface{}) string {
+	c := getCachedColor(p)
+
+	if len(a) == 0 {
+		return c.SprintFunc()(format)
+	}
+
+	return c.SprintfFunc()(format, a...)
+}
+
+// Black is a convenient helper function to print with black foreground. A
+// newline is appended to format by default.
+func Black(format string, a ...interface{}) { colorPrint(format, FgBlack, a...) }
+
+// Red is a convenient helper function to print with red foreground. A
+// newline is appended to format by default.
+func Red(format string, a ...interface{}) { colorPrint(format, FgRed, a...) }
+
+// Green is a convenient helper function to print with green foreground. A
+// newline is appended to format by default.
+func Green(format string, a ...interface{}) { colorPrint(format, FgGreen, a...) }
+
+// Yellow is a convenient helper function to print with yellow foreground.
+// A newline is appended to format by default.
+func Yellow(format string, a ...interface{}) { colorPrint(format, FgYellow, a...) }
+
+// Blue is a convenient helper function to print with blue foreground. A
+// newline is appended to format by default.
+func Blue(format string, a ...interface{}) { colorPrint(format, FgBlue, a...) }
+
+// Magenta is a convenient helper function to print with magenta foreground.
+// A newline is appended to format by default.
+func Magenta(format string, a ...interface{}) { colorPrint(format, FgMagenta, a...) }
+
+// Cyan is a convenient helper function to print with cyan foreground. A
+// newline is appended to format by default.
+func Cyan(format string, a ...interface{}) { colorPrint(format, FgCyan, a...) }
+
+// White is a convenient helper function to print with white foreground. A
+// newline is appended to format by default.
+func White(format string, a ...interface{}) { colorPrint(format, FgWhite, a...) }
+
+// BlackString is a convenient helper function to return a string with black
+// foreground.
+func BlackString(format string, a ...interface{}) string { return colorString(format, FgBlack, a...) }
+
+// RedString is a convenient helper function to return a string with red
+// foreground.
+func RedString(format string, a ...interface{}) string { return colorString(format, FgRed, a...) }
+
+// GreenString is a convenient helper function to return a string with green
+// foreground.
+func GreenString(format string, a ...interface{}) string { return colorString(format, FgGreen, a...) }
+
+// YellowString is a convenient helper function to return a string with yellow
+// foreground.
+func YellowString(format string, a ...interface{}) string { return colorString(format, FgYellow, a...) }
+
+// BlueString is a convenient helper function to return a string with blue
+// foreground.
+func BlueString(format string, a ...interface{}) string { return colorString(format, FgBlue, a...) }
+
+// MagentaString is a convenient helper function to return a string with magenta
+// foreground.
+func MagentaString(format string, a ...interface{}) string {
+	return colorString(format, FgMagenta, a...)
+}
+
+// CyanString is a convenient helper function to return a string with cyan
+// foreground.
+func CyanString(format string, a ...interface{}) string { return colorString(format, FgCyan, a...) }
+
+// WhiteString is a convenient helper function to return a string with white
+// foreground.
+func WhiteString(format string, a ...interface{}) string { return colorString(format, FgWhite, a...) }
+
+// HiBlack is a convenient helper function to print with hi-intensity black foreground. A
+// newline is appended to format by default.
+func HiBlack(format string, a ...interface{}) { colorPrint(format, FgHiBlack, a...) }
+
+// HiRed is a convenient helper function to print with hi-intensity red foreground. A
+// newline is appended to format by default.
+func HiRed(format string, a ...interface{}) { colorPrint(format, FgHiRed, a...) }
+
+// HiGreen is a convenient helper function to print with hi-intensity green foreground. A
+// newline is appended to format by default.
+func HiGreen(format string, a ...interface{}) { colorPrint(format, FgHiGreen, a...) }
+
+// HiYellow is a convenient helper function to print with hi-intensity yellow foreground.
+// A newline is appended to format by default.
+func HiYellow(format string, a ...interface{}) { colorPrint(format, FgHiYellow, a...) }
+
+// HiBlue is a convenient helper function to print with hi-intensity blue foreground. A
+// newline is appended to format by default.
+func HiBlue(format string, a ...interface{}) { colorPrint(format, FgHiBlue, a...) }
+
+// HiMagenta is a convenient helper function to print with hi-intensity magenta foreground.
+// A newline is appended to format by default.
+func HiMagenta(format string, a ...interface{}) { colorPrint(format, FgHiMagenta, a...) }
+
+// HiCyan is a convenient helper function to print with hi-intensity cyan foreground. A
+// newline is appended to format by default.
+func HiCyan(format string, a ...interface{}) { colorPrint(format, FgHiCyan, a...) }
+
+// HiWhite is a convenient helper function to print with hi-intensity white foreground. A
+// newline is appended to format by default.
+func HiWhite(format string, a ...interface{}) { colorPrint(format, FgHiWhite, a...) }
+
+// HiBlackString is a convenient helper function to return a string with hi-intensity black
+// foreground.
+func HiBlackString(format string, a ...interface{}) string {
+	return colorString(format, FgHiBlack, a...)
+}
+
+// HiRedString is a convenient helper function to return a string with hi-intensity red
+// foreground.
+func HiRedString(format string, a ...interface{}) string { return colorString(format, FgHiRed, a...) }
+
+// HiGreenString is a convenient helper function to return a string with hi-intensity green
+// foreground.
+func HiGreenString(format string, a ...interface{}) string {
+	return colorString(format, FgHiGreen, a...)
+}
+
+// HiYellowString is a convenient helper function to return a string with hi-intensity yellow
+// foreground.
+func HiYellowString(format string, a ...interface{}) string {
+	return colorString(format, FgHiYellow, a...)
+}
+
+// HiBlueString is a convenient helper function to return a string with hi-intensity blue
+// foreground.
+func HiBlueString(format string, a ...interface{}) string { return colorString(format, FgHiBlue, a...) }
+
+// HiMagentaString is a convenient helper function to return a string with hi-intensity magenta
+// foreground.
+func HiMagentaString(format string, a ...interface{}) string {
+	return colorString(format, FgHiMagenta, a...)
+}
+
+// HiCyanString is a convenient helper function to return a string with hi-intensity cyan
+// foreground.
+func HiCyanString(format string, a ...interface{}) string { return colorString(format, FgHiCyan, a...) }
+
+// HiWhiteString is a convenient helper function to return a string with hi-intensity white
+// foreground.
+func HiWhiteString(format string, a ...interface{}) string {
+	return colorString(format, FgHiWhite, a...)
+}
--- a/vendor/github.com/fatih/color/doc.go
+++ b/vendor/github.com/fatih/color/doc.go
@ -0,0 +1,133 @@
+/*
+Package color is an ANSI color package to output colorized or SGR defined
+output to the standard output. The API can be used in several way, pick one
+that suits you.
+
+Use simple and default helper functions with predefined foreground colors:
+
+    color.Cyan("Prints text in cyan.")
+
+    // a newline will be appended automatically
+    color.Blue("Prints %s in blue.", "text")
+
+    // More default foreground colors..
+    color.Red("We have red")
+    color.Yellow("Yellow color too!")
+    color.Magenta("And many others ..")
+
+    // Hi-intensity colors
+    color.HiGreen("Bright green color.")
+    color.HiBlack("Bright black means gray..")
+    color.HiWhite("Shiny white color!")
+
+However there are times where custom color mixes are required. Below are some
+examples to create custom color objects and use the print functions of each
+separate color object.
+
+    // Create a new color object
+    c := color.New(color.FgCyan).Add(color.Underline)
+    c.Println("Prints cyan text with an underline.")
+
+    // Or just add them to New()
+    d := color.New(color.FgCyan, color.Bold)
+    d.Printf("This prints bold cyan %s\n", "too!.")
+
+
+    // Mix up foreground and background colors, create new mixes!
+    red := color.New(color.FgRed)
+
+    boldRed := red.Add(color.Bold)
+    boldRed.Println("This will print text in bold red.")
+
+    whiteBackground := red.Add(color.BgWhite)
+    whiteBackground.Println("Red text with White background.")
+
+    // Use your own io.Writer output
+    color.New(color.FgBlue).Fprintln(myWriter, "blue color!")
+
+    blue := color.New(color.FgBlue)
+    blue.Fprint(myWriter, "This will print text in blue.")
+
+You can create PrintXxx functions to simplify even more:
+
+    // Create a custom print function for convenient
+    red := color.New(color.FgRed).PrintfFunc()
+    red("warning")
+    red("error: %s", err)
+
+    // Mix up multiple attributes
+    notice := color.New(color.Bold, color.FgGreen).PrintlnFunc()
+    notice("don't forget this...")
+
+You can also FprintXxx functions to pass your own io.Writer:
+
+    blue := color.New(FgBlue).FprintfFunc()
+    blue(myWriter, "important notice: %s", stars)
+
+    // Mix up with multiple attributes
+    success := color.New(color.Bold, color.FgGreen).FprintlnFunc()
+    success(myWriter, don't forget this...")
+
+
+Or create SprintXxx functions to mix strings with other non-colorized strings:
+
+    yellow := New(FgYellow).SprintFunc()
+    red := New(FgRed).SprintFunc()
+
+    fmt.Printf("this is a %s and this is %s.\n", yellow("warning"), red("error"))
+
+    info := New(FgWhite, BgGreen).SprintFunc()
+    fmt.Printf("this %s rocks!\n", info("package"))
+
+Windows support is enabled by default. All Print functions work as intended.
+However only for color.SprintXXX functions, user should use fmt.FprintXXX and
+set the output to color.Output:
+
+    fmt.Fprintf(color.Output, "Windows support: %s", color.GreenString("PASS"))
+
+    info := New(FgWhite, BgGreen).SprintFunc()
+    fmt.Fprintf(color.Output, "this %s rocks!\n", info("package"))
+
+Using with existing code is possible. Just use the Set() method to set the
+standard output to the given parameters. That way a rewrite of an existing
+code is not required.
+
+    // Use handy standard colors.
+    color.Set(color.FgYellow)
+
+    fmt.Println("Existing text will be now in Yellow")
+    fmt.Printf("This one %s\n", "too")
+
+    color.Unset() // don't forget to unset
+
+    // You can mix up parameters
+    color.Set(color.FgMagenta, color.Bold)
+    defer color.Unset() // use it in your function
+
+    fmt.Println("All text will be now bold magenta.")
+
+There might be a case where you want to disable color output (for example to
+pipe the standard output of your app to somewhere else). `Color` has support to
+disable colors both globally and for single color definition. For example
+suppose you have a CLI app and a `--no-color` bool flag. You can easily disable
+the color output with:
+
+    var flagNoColor = flag.Bool("no-color", false, "Disable color output")
+
+    if *flagNoColor {
+    	color.NoColor = true // disables colorized output
+    }
+
+It also has support for single color definitions (local). You can
+disable/enable color output on the fly:
+
+     c := color.New(color.FgCyan)
+     c.Println("Prints cyan text")
+
+     c.DisableColor()
+     c.Println("This is printed without any color")
+
+     c.EnableColor()
+     c.Println("This prints again cyan...")
+*/
+package color
--- a/vendor/github.com/fatih/color/go.mod
+++ b/vendor/github.com/fatih/color/go.mod
@ -0,0 +1,8 @@
+module github.com/fatih/color
+
+go 1.13
+
+require (
+	github.com/mattn/go-colorable v0.1.4
+	github.com/mattn/go-isatty v0.0.11
+)
--- a/vendor/github.com/fatih/color/go.sum
+++ b/vendor/github.com/fatih/color/go.sum
@ -0,0 +1,8 @@
+github.com/mattn/go-colorable v0.1.4 h1:snbPLB8fVfU9iwbbo30TPtbLRzwWu6aJS6Xh4eaaviA=
+github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
+github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
+github.com/mattn/go-isatty v0.0.11 h1:FxPOTFNqGkuDUGi3H/qkUbQO4ZiBa2brKq5r0l8TGeM=
+github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOAqxQCu2WE=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
--- a/vendor/github.com/fatih/structtag/LICENSE
+++ b/vendor/github.com/fatih/structtag/LICENSE
@ -0,0 +1,60 @@
+Copyright (c) 2017, Fatih Arslan
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of structtag nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+This software includes some portions from Go. Go is used under the terms of the
+BSD like license.
+
+Copyright (c) 2012 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+The Go gopher was designed by Renee French. http://reneefrench.blogspot.com/ The design is licensed under the Creative Commons 3.0 Attributions license. Read this article for more details: https://blog.golang.org/gopher
--- a/vendor/github.com/fatih/structtag/README.md
+++ b/vendor/github.com/fatih/structtag/README.md
@ -0,0 +1,73 @@
+# structtag [![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](http://godoc.org/github.com/fatih/structtag) 
+
+structtag provides an easy way of parsing and manipulating struct tag fields.
+Please vendor the library as it might change in future versions.
+
+# Install
+
+```bash
+go get github.com/fatih/structtag
+```
+
+# Example
+
+```go
+package main
+
+import (
+	"fmt"
+	"reflect"
+	"sort"
+
+	"github.com/fatih/structtag"
+)
+
+func main() {
+	type t struct {
+		t string `json:"foo,omitempty,string" xml:"foo"`
+	}
+
+	// get field tag
+	tag := reflect.TypeOf(t{}).Field(0).Tag
+
+	// ... and start using structtag by parsing the tag
+	tags, err := structtag.Parse(string(tag))
+	if err != nil {
+		panic(err)
+	}
+
+	// iterate over all tags
+	for _, t := range tags.Tags() {
+		fmt.Printf("tag: %+v\n", t)
+	}
+
+	// get a single tag
+	jsonTag, err := tags.Get("json")
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(jsonTag)         // Output: json:"foo,omitempty,string"
+	fmt.Println(jsonTag.Key)     // Output: json
+	fmt.Println(jsonTag.Name)    // Output: foo
+	fmt.Println(jsonTag.Options) // Output: [omitempty string]
+
+	// change existing tag
+	jsonTag.Name = "foo_bar"
+	jsonTag.Options = nil
+	tags.Set(jsonTag)
+
+	// add new tag
+	tags.Set(&structtag.Tag{
+		Key:     "hcl",
+		Name:    "foo",
+		Options: []string{"squash"},
+	})
+
+	// print the tags
+	fmt.Println(tags) // Output: json:"foo_bar" xml:"foo" hcl:"foo,squash"
+
+	// sort tags according to keys
+	sort.Sort(tags)
+	fmt.Println(tags) // Output: hcl:"foo,squash" json:"foo_bar" xml:"foo"
+}
+```
--- a/vendor/github.com/fatih/structtag/go.mod
+++ b/vendor/github.com/fatih/structtag/go.mod
@ -0,0 +1,3 @@
+module github.com/fatih/structtag
+
+go 1.12
--- a/vendor/github.com/fatih/structtag/tags.go
+++ b/vendor/github.com/fatih/structtag/tags.go
@ -0,0 +1,315 @@
+package structtag
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+var (
+	errTagSyntax      = errors.New("bad syntax for struct tag pair")
+	errTagKeySyntax   = errors.New("bad syntax for struct tag key")
+	errTagValueSyntax = errors.New("bad syntax for struct tag value")
+
+	errKeyNotSet      = errors.New("tag key does not exist")
+	errTagNotExist    = errors.New("tag does not exist")
+	errTagKeyMismatch = errors.New("mismatch between key and tag.key")
+)
+
+// Tags represent a set of tags from a single struct field
+type Tags struct {
+	tags []*Tag
+}
+
+// Tag defines a single struct's string literal tag
+type Tag struct {
+	// Key is the tag key, such as json, xml, etc..
+	// i.e: `json:"foo,omitempty". Here key is: "json"
+	Key string
+
+	// Name is a part of the value
+	// i.e: `json:"foo,omitempty". Here name is: "foo"
+	Name string
+
+	// Options is a part of the value. It contains a slice of tag options i.e:
+	// `json:"foo,omitempty". Here options is: ["omitempty"]
+	Options []string
+}
+
+// Parse parses a single struct field tag and returns the set of tags.
+func Parse(tag string) (*Tags, error) {
+	var tags []*Tag
+
+	hasTag := tag != ""
+
+	// NOTE(arslan) following code is from reflect and vet package with some
+	// modifications to collect all necessary information and extend it with
+	// usable methods
+	for tag != "" {
+		// Skip leading space.
+		i := 0
+		for i < len(tag) && tag[i] == ' ' {
+			i++
+		}
+		tag = tag[i:]
+		if tag == "" {
+			break
+		}
+
+		// Scan to colon. A space, a quote or a control character is a syntax
+		// error. Strictly speaking, control chars include the range [0x7f,
+		// 0x9f], not just [0x00, 0x1f], but in practice, we ignore the
+		// multi-byte control characters as it is simpler to inspect the tag's
+		// bytes than the tag's runes.
+		i = 0
+		for i < len(tag) && tag[i] > ' ' && tag[i] != ':' && tag[i] != '"' && tag[i] != 0x7f {
+			i++
+		}
+
+		if i == 0 {
+			return nil, errTagKeySyntax
+		}
+		if i+1 >= len(tag) || tag[i] != ':' {
+			return nil, errTagSyntax
+		}
+		if tag[i+1] != '"' {
+			return nil, errTagValueSyntax
+		}
+
+		key := string(tag[:i])
+		tag = tag[i+1:]
+
+		// Scan quoted string to find value.
+		i = 1
+		for i < len(tag) && tag[i] != '"' {
+			if tag[i] == '\\' {
+				i++
+			}
+			i++
+		}
+		if i >= len(tag) {
+			return nil, errTagValueSyntax
+		}
+
+		qvalue := string(tag[:i+1])
+		tag = tag[i+1:]
+
+		value, err := strconv.Unquote(qvalue)
+		if err != nil {
+			return nil, errTagValueSyntax
+		}
+
+		res := strings.Split(value, ",")
+		name := res[0]
+		options := res[1:]
+		if len(options) == 0 {
+			options = nil
+		}
+
+		tags = append(tags, &Tag{
+			Key:     key,
+			Name:    name,
+			Options: options,
+		})
+	}
+
+	if hasTag && len(tags) == 0 {
+		return nil, nil
+	}
+
+	return &Tags{
+		tags: tags,
+	}, nil
+}
+
+// Get returns the tag associated with the given key. If the key is present
+// in the tag the value (which may be empty) is returned. Otherwise the
+// returned value will be the empty string. The ok return value reports whether
+// the tag exists or not (which the return value is nil).
+func (t *Tags) Get(key string) (*Tag, error) {
+	for _, tag := range t.tags {
+		if tag.Key == key {
+			return tag, nil
+		}
+	}
+
+	return nil, errTagNotExist
+}
+
+// Set sets the given tag. If the tag key already exists it'll override it
+func (t *Tags) Set(tag *Tag) error {
+	if tag.Key == "" {
+		return errKeyNotSet
+	}
+
+	added := false
+	for i, tg := range t.tags {
+		if tg.Key == tag.Key {
+			added = true
+			t.tags[i] = tag
+		}
+	}
+
+	if !added {
+		// this means this is a new tag, add it
+		t.tags = append(t.tags, tag)
+	}
+
+	return nil
+}
+
+// AddOptions adds the given option for the given key. If the option already
+// exists it doesn't add it again.
+func (t *Tags) AddOptions(key string, options ...string) {
+	for i, tag := range t.tags {
+		if tag.Key != key {
+			continue
+		}
+
+		for _, opt := range options {
+			if !tag.HasOption(opt) {
+				tag.Options = append(tag.Options, opt)
+			}
+		}
+
+		t.tags[i] = tag
+	}
+}
+
+// DeleteOptions deletes the given options for the given key
+func (t *Tags) DeleteOptions(key string, options ...string) {
+	hasOption := func(option string) bool {
+		for _, opt := range options {
+			if opt == option {
+				return true
+			}
+		}
+		return false
+	}
+
+	for i, tag := range t.tags {
+		if tag.Key != key {
+			continue
+		}
+
+		var updated []string
+		for _, opt := range tag.Options {
+			if !hasOption(opt) {
+				updated = append(updated, opt)
+			}
+		}
+
+		tag.Options = updated
+		t.tags[i] = tag
+	}
+}
+
+// Delete deletes the tag for the given keys
+func (t *Tags) Delete(keys ...string) {
+	hasKey := func(key string) bool {
+		for _, k := range keys {
+			if k == key {
+				return true
+			}
+		}
+		return false
+	}
+
+	var updated []*Tag
+	for _, tag := range t.tags {
+		if !hasKey(tag.Key) {
+			updated = append(updated, tag)
+		}
+	}
+
+	t.tags = updated
+}
+
+// Tags returns a slice of tags. The order is the original tag order unless it
+// was changed.
+func (t *Tags) Tags() []*Tag {
+	return t.tags
+}
+
+// Tags returns a slice of tags. The order is the original tag order unless it
+// was changed.
+func (t *Tags) Keys() []string {
+	var keys []string
+	for _, tag := range t.tags {
+		keys = append(keys, tag.Key)
+	}
+	return keys
+}
+
+// String reassembles the tags into a valid literal tag field representation
+func (t *Tags) String() string {
+	tags := t.Tags()
+	if len(tags) == 0 {
+		return ""
+	}
+
+	var buf bytes.Buffer
+	for i, tag := range t.Tags() {
+		buf.WriteString(tag.String())
+		if i != len(tags)-1 {
+			buf.WriteString(" ")
+		}
+	}
+	return buf.String()
+}
+
+// HasOption returns true if the given option is available in options
+func (t *Tag) HasOption(opt string) bool {
+	for _, tagOpt := range t.Options {
+		if tagOpt == opt {
+			return true
+		}
+	}
+
+	return false
+}
+
+// Value returns the raw value of the tag, i.e. if the tag is
+// `json:"foo,omitempty", the Value is "foo,omitempty"
+func (t *Tag) Value() string {
+	options := strings.Join(t.Options, ",")
+	if options != "" {
+		return fmt.Sprintf(`%s,%s`, t.Name, options)
+	}
+	return t.Name
+}
+
+// String reassembles the tag into a valid tag field representation
+func (t *Tag) String() string {
+	return fmt.Sprintf(`%s:%q`, t.Key, t.Value())
+}
+
+// GoString implements the fmt.GoStringer interface
+func (t *Tag) GoString() string {
+	template := `{
+		Key:    '%s',
+		Name:   '%s',
+		Option: '%s',
+	}`
+
+	if t.Options == nil {
+		return fmt.Sprintf(template, t.Key, t.Name, "nil")
+	}
+
+	options := strings.Join(t.Options, ",")
+	return fmt.Sprintf(template, t.Key, t.Name, options)
+}
+
+func (t *Tags) Len() int {
+	return len(t.tags)
+}
+
+func (t *Tags) Less(i int, j int) bool {
+	return t.tags[i].Key < t.tags[j].Key
+}
+
+func (t *Tags) Swap(i int, j int) {
+	t.tags[i], t.tags[j] = t.tags[j], t.tags[i]
+}
--- a/vendor/github.com/mattn/go-colorable/.travis.yml
+++ b/vendor/github.com/mattn/go-colorable/.travis.yml
@ -0,0 +1,9 @@
+language: go
+go:
+  - tip
+
+before_install:
+  - go get github.com/mattn/goveralls
+  - go get golang.org/x/tools/cmd/cover
+script:
+  - $HOME/gopath/bin/goveralls -repotoken xnXqRGwgW3SXIguzxf90ZSK1GPYZPaGrw
--- a/vendor/github.com/mattn/go-colorable/LICENSE
+++ b/vendor/github.com/mattn/go-colorable/LICENSE
@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Yasuhiro Matsumoto
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/vendor/github.com/mattn/go-colorable/README.md
+++ b/vendor/github.com/mattn/go-colorable/README.md
@ -0,0 +1,48 @@
+# go-colorable
+
+[![Godoc Reference](https://godoc.org/github.com/mattn/go-colorable?status.svg)](http://godoc.org/github.com/mattn/go-colorable)
+[![Build Status](https://travis-ci.org/mattn/go-colorable.svg?branch=master)](https://travis-ci.org/mattn/go-colorable)
+[![Coverage Status](https://coveralls.io/repos/github/mattn/go-colorable/badge.svg?branch=master)](https://coveralls.io/github/mattn/go-colorable?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/mattn/go-colorable)](https://goreportcard.com/report/mattn/go-colorable)
+
+Colorable writer for windows.
+
+For example, most of logger packages doesn't show colors on windows. (I know we can do it with ansicon. But I don't want.)
+This package is possible to handle escape sequence for ansi color on windows.
+
+## Too Bad!
+
+![](https://raw.githubusercontent.com/mattn/go-colorable/gh-pages/bad.png)
+
+
+## So Good!
+
+![](https://raw.githubusercontent.com/mattn/go-colorable/gh-pages/good.png)
+
+## Usage
+
+```go
+logrus.SetFormatter(&logrus.TextFormatter{ForceColors: true})
+logrus.SetOutput(colorable.NewColorableStdout())
+
+logrus.Info("succeeded")
+logrus.Warn("not correct")
+logrus.Error("something error")
+logrus.Fatal("panic")
+```
+
+You can compile above code on non-windows OSs.
+
+## Installation
+
+```
+$ go get github.com/mattn/go-colorable
+```
+
+# License
+
+MIT
+
+# Author
+
+Yasuhiro Matsumoto (a.k.a mattn)
--- a/vendor/github.com/mattn/go-colorable/colorable_appengine.go
+++ b/vendor/github.com/mattn/go-colorable/colorable_appengine.go
@ -0,0 +1,29 @@
+// +build appengine
+
+package colorable
+
+import (
+	"io"
+	"os"
+
+	_ "github.com/mattn/go-isatty"
+)
+
+// NewColorable returns new instance of Writer which handles escape sequence.
+func NewColorable(file *os.File) io.Writer {
+	if file == nil {
+		panic("nil passed instead of *os.File to NewColorable()")
+	}
+
+	return file
+}
+
+// NewColorableStdout returns new instance of Writer which handles escape sequence for stdout.
+func NewColorableStdout() io.Writer {
+	return os.Stdout
+}
+
+// NewColorableStderr returns new instance of Writer which handles escape sequence for stderr.
+func NewColorableStderr() io.Writer {
+	return os.Stderr
+}
--- a/vendor/github.com/mattn/go-colorable/colorable_others.go
+++ b/vendor/github.com/mattn/go-colorable/colorable_others.go
@ -0,0 +1,30 @@
+// +build !windows
+// +build !appengine
+
+package colorable
+
+import (
+	"io"
+	"os"
+
+	_ "github.com/mattn/go-isatty"
+)
+
+// NewColorable returns new instance of Writer which handles escape sequence.
+func NewColorable(file *os.File) io.Writer {
+	if file == nil {
+		panic("nil passed instead of *os.File to NewColorable()")
+	}
+
+	return file
+}
+
+// NewColorableStdout returns new instance of Writer which handles escape sequence for stdout.
+func NewColorableStdout() io.Writer {
+	return os.Stdout
+}
+
+// NewColorableStderr returns new instance of Writer which handles escape sequence for stderr.
+func NewColorableStderr() io.Writer {
+	return os.Stderr
+}
--- a/vendor/github.com/mattn/go-colorable/colorable_windows.go
+++ b/vendor/github.com/mattn/go-colorable/colorable_windows.go
--- a/vendor/github.com/mattn/go-colorable/go.mod
+++ b/vendor/github.com/mattn/go-colorable/go.mod
@ -0,0 +1,3 @@
+module github.com/mattn/go-colorable
+
+require github.com/mattn/go-isatty v0.0.8
--- a/vendor/github.com/mattn/go-colorable/go.sum
+++ b/vendor/github.com/mattn/go-colorable/go.sum
@ -0,0 +1,4 @@
+github.com/mattn/go-isatty v0.0.5 h1:tHXDdz1cpzGaovsTB+TVB8q90WEokoVmfMqoVcrLUgw=
+github.com/mattn/go-isatty v0.0.5/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
--- a/vendor/github.com/mattn/go-colorable/noncolorable.go
+++ b/vendor/github.com/mattn/go-colorable/noncolorable.go
@ -0,0 +1,55 @@
+package colorable
+
+import (
+	"bytes"
+	"io"
+)
+
+// NonColorable holds writer but removes escape sequence.
+type NonColorable struct {
+	out io.Writer
+}
+
+// NewNonColorable returns new instance of Writer which removes escape sequence from Writer.
+func NewNonColorable(w io.Writer) io.Writer {
+	return &NonColorable{out: w}
+}
+
+// Write writes data on console
+func (w *NonColorable) Write(data []byte) (n int, err error) {
+	er := bytes.NewReader(data)
+	var bw [1]byte
+loop:
+	for {
+		c1, err := er.ReadByte()
+		if err != nil {
+			break loop
+		}
+		if c1 != 0x1b {
+			bw[0] = c1
+			w.out.Write(bw[:])
+			continue
+		}
+		c2, err := er.ReadByte()
+		if err != nil {
+			break loop
+		}
+		if c2 != 0x5b {
+			continue
+		}
+
+		var buf bytes.Buffer
+		for {
+			c, err := er.ReadByte()
+			if err != nil {
+				break loop
+			}
+			if ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '@' {
+				break
+			}
+			buf.Write([]byte(string(c)))
+		}
+	}
+
+	return len(data), nil
+}
--- a/vendor/github.com/mattn/go-isatty/go.mod
+++ b/vendor/github.com/mattn/go-isatty/go.mod
@ -1,3 +1,5 @@
 module github.com/mattn/go-isatty

-require golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223
+go 1.12
+
+require golang.org/x/sys v0.0.0-20191026070338-33540a1f6037
--- a/vendor/github.com/mattn/go-isatty/go.sum
+++ b/vendor/github.com/mattn/go-isatty/go.sum
@ -1,2 +1,2 @@
-golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
-golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
--- a/vendor/github.com/mattn/go-isatty/isatty_others.go
+++ b/vendor/github.com/mattn/go-isatty/isatty_others.go
@ -1,4 +1,4 @@
-// +build appengine js
+// +build appengine js nacl

 package isatty

--- a/vendor/github.com/mattn/go-isatty/isatty_plan9.go
+++ b/vendor/github.com/mattn/go-isatty/isatty_plan9.go
@ -0,0 +1,22 @@
+// +build plan9
+
+package isatty
+
+import (
+	"syscall"
+)
+
+// IsTerminal returns true if the given file descriptor is a terminal.
+func IsTerminal(fd uintptr) bool {
+	path, err := syscall.Fd2path(int(fd))
+	if err != nil {
+		return false
+	}
+	return path == "/dev/cons" || path == "/mnt/term/dev/cons"
+}
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}
--- a/vendor/github.com/mattn/go-isatty/isatty_tcgets.go
+++ b/vendor/github.com/mattn/go-isatty/isatty_tcgets.go
@ -1,4 +1,4 @@
-// +build linux
+// +build linux aix
 // +build !appengine
 // +build !android

--- a/vendor/github.com/mattn/go-isatty/isatty_windows.go
+++ b/vendor/github.com/mattn/go-isatty/isatty_windows.go
@ -4,6 +4,7 @@
 package isatty

 import (
+	"errors"
 	"strings"
 	"syscall"
 	"unicode/utf16"
@ -11,15 +12,18 @@ import (
 )

 const (
-	fileNameInfo uintptr = 2
-	fileTypePipe         = 3
+	objectNameInfo uintptr = 1
+	fileNameInfo           = 2
+	fileTypePipe           = 3
 )

 var (
 	kernel32                         = syscall.NewLazyDLL("kernel32.dll")
+	ntdll                            = syscall.NewLazyDLL("ntdll.dll")
 	procGetConsoleMode               = kernel32.NewProc("GetConsoleMode")
 	procGetFileInformationByHandleEx = kernel32.NewProc("GetFileInformationByHandleEx")
 	procGetFileType                  = kernel32.NewProc("GetFileType")
+	procNtQueryObject                = ntdll.NewProc("NtQueryObject")
 )

 func init() {
@ -45,7 +49,10 @@ func isCygwinPipeName(name string) bool {
 		return false
 	}

-	if token[0] != `\msys` && token[0] != `\cygwin` {
+	if token[0] != `\msys` &&
+		token[0] != `\cygwin` &&
+		token[0] != `\Device\NamedPipe\msys` &&
+		token[0] != `\Device\NamedPipe\cygwin` {
 		return false
 	}

@ -68,11 +75,35 @@ func isCygwinPipeName(name string) bool {
 	return true
 }

+// getFileNameByHandle use the undocomented ntdll NtQueryObject to get file full name from file handler
+// since GetFileInformationByHandleEx is not avilable under windows Vista and still some old fashion
+// guys are using Windows XP, this is a workaround for those guys, it will also work on system from
+// Windows vista to 10
+// see https://stackoverflow.com/a/18792477 for details
+func getFileNameByHandle(fd uintptr) (string, error) {
+	if procNtQueryObject == nil {
+		return "", errors.New("ntdll.dll: NtQueryObject not supported")
+	}
+
+	var buf [4 + syscall.MAX_PATH]uint16
+	var result int
+	r, _, e := syscall.Syscall6(procNtQueryObject.Addr(), 5,
+		fd, objectNameInfo, uintptr(unsafe.Pointer(&buf)), uintptr(2*len(buf)), uintptr(unsafe.Pointer(&result)), 0)
+	if r != 0 {
+		return "", e
+	}
+	return string(utf16.Decode(buf[4 : 4+buf[0]/2])), nil
+}
+
 // IsCygwinTerminal() return true if the file descriptor is a cygwin or msys2
 // terminal.
 func IsCygwinTerminal(fd uintptr) bool {
 	if procGetFileInformationByHandleEx == nil {
-		return false
+		name, err := getFileNameByHandle(fd)
+		if err != nil {
+			return false
+		}
+		return isCygwinPipeName(name)
 	}

 	// Cygwin/msys's pty is a pipe.
--- a/vendor/github.com/mattn/go-runewidth/.travis.yml
+++ b/vendor/github.com/mattn/go-runewidth/.travis.yml
@ -0,0 +1,8 @@
+language: go
+go:
+  - tip
+before_install:
+  - go get github.com/mattn/goveralls
+  - go get golang.org/x/tools/cmd/cover
+script:
+    - $HOME/gopath/bin/goveralls -repotoken lAKAWPzcGsD3A8yBX3BGGtRUdJ6CaGERL
--- a/vendor/github.com/mattn/go-runewidth/LICENSE
+++ b/vendor/github.com/mattn/go-runewidth/LICENSE
@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Yasuhiro Matsumoto
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/vendor/github.com/mattn/go-runewidth/README.mkd
+++ b/vendor/github.com/mattn/go-runewidth/README.mkd
@ -0,0 +1,27 @@
+go-runewidth
+============
+
+[![Build Status](https://travis-ci.org/mattn/go-runewidth.png?branch=master)](https://travis-ci.org/mattn/go-runewidth)
+[![Coverage Status](https://coveralls.io/repos/mattn/go-runewidth/badge.png?branch=HEAD)](https://coveralls.io/r/mattn/go-runewidth?branch=HEAD)
+[![GoDoc](https://godoc.org/github.com/mattn/go-runewidth?status.svg)](http://godoc.org/github.com/mattn/go-runewidth)
+[![Go Report Card](https://goreportcard.com/badge/github.com/mattn/go-runewidth)](https://goreportcard.com/report/github.com/mattn/go-runewidth)
+
+Provides functions to get fixed width of the character or string.
+
+Usage
+-----
+
+```go
+runewidth.StringWidth("つのだ☆HIRO") == 12
+```
+
+
+Author
+------
+
+Yasuhiro Matsumoto
+
+License
+-------
+
+under the MIT License: http://mattn.mit-license.org/2013
--- a/vendor/github.com/mattn/go-runewidth/go.mod
+++ b/vendor/github.com/mattn/go-runewidth/go.mod
@ -0,0 +1,3 @@
+module github.com/mattn/go-runewidth
+
+go 1.9
--- a/vendor/github.com/mattn/go-runewidth/runewidth.go
+++ b/vendor/github.com/mattn/go-runewidth/runewidth.go
@ -0,0 +1,258 @@
+package runewidth
+
+import (
+	"os"
+)
+
+//go:generate go run script/generate.go
+
+var (
+	// EastAsianWidth will be set true if the current locale is CJK
+	EastAsianWidth bool
+
+	// ZeroWidthJoiner is flag to set to use UTR#51 ZWJ
+	ZeroWidthJoiner bool
+
+	// DefaultCondition is a condition in current locale
+	DefaultCondition = &Condition{}
+)
+
+func init() {
+	handleEnv()
+}
+
+func handleEnv() {
+	env := os.Getenv("RUNEWIDTH_EASTASIAN")
+	if env == "" {
+		EastAsianWidth = IsEastAsian()
+	} else {
+		EastAsianWidth = env == "1"
+	}
+	// update DefaultCondition
+	DefaultCondition.EastAsianWidth = EastAsianWidth
+	DefaultCondition.ZeroWidthJoiner = ZeroWidthJoiner
+}
+
+type interval struct {
+	first rune
+	last  rune
+}
+
+type table []interval
+
+func inTables(r rune, ts ...table) bool {
+	for _, t := range ts {
+		if inTable(r, t) {
+			return true
+		}
+	}
+	return false
+}
+
+func inTable(r rune, t table) bool {
+	// func (t table) IncludesRune(r rune) bool {
+	if r < t[0].first {
+		return false
+	}
+
+	bot := 0
+	top := len(t) - 1
+	for top >= bot {
+		mid := (bot + top) >> 1
+
+		switch {
+		case t[mid].last < r:
+			bot = mid + 1
+		case t[mid].first > r:
+			top = mid - 1
+		default:
+			return true
+		}
+	}
+
+	return false
+}
+
+var private = table{
+	{0x00E000, 0x00F8FF}, {0x0F0000, 0x0FFFFD}, {0x100000, 0x10FFFD},
+}
+
+var nonprint = table{
+	{0x0000, 0x001F}, {0x007F, 0x009F}, {0x00AD, 0x00AD},
+	{0x070F, 0x070F}, {0x180B, 0x180E}, {0x200B, 0x200F},
+	{0x2028, 0x202E}, {0x206A, 0x206F}, {0xD800, 0xDFFF},
+	{0xFEFF, 0xFEFF}, {0xFFF9, 0xFFFB}, {0xFFFE, 0xFFFF},
+}
+
+// Condition have flag EastAsianWidth whether the current locale is CJK or not.
+type Condition struct {
+	EastAsianWidth  bool
+	ZeroWidthJoiner bool
+}
+
+// NewCondition return new instance of Condition which is current locale.
+func NewCondition() *Condition {
+	return &Condition{
+		EastAsianWidth:  EastAsianWidth,
+		ZeroWidthJoiner: ZeroWidthJoiner,
+	}
+}
+
+// RuneWidth returns the number of cells in r.
+// See http://www.unicode.org/reports/tr11/
+func (c *Condition) RuneWidth(r rune) int {
+	switch {
+	case r < 0 || r > 0x10FFFF || inTables(r, nonprint, combining, notassigned):
+		return 0
+	case (c.EastAsianWidth && IsAmbiguousWidth(r)) || inTables(r, doublewidth):
+		return 2
+	default:
+		return 1
+	}
+}
+
+func (c *Condition) stringWidth(s string) (width int) {
+	for _, r := range []rune(s) {
+		width += c.RuneWidth(r)
+	}
+	return width
+}
+
+func (c *Condition) stringWidthZeroJoiner(s string) (width int) {
+	r1, r2 := rune(0), rune(0)
+	for _, r := range []rune(s) {
+		if r == 0xFE0E || r == 0xFE0F {
+			continue
+		}
+		w := c.RuneWidth(r)
+		if r2 == 0x200D && inTables(r, emoji) && inTables(r1, emoji) {
+			if width < w {
+				width = w
+			}
+		} else {
+			width += w
+		}
+		r1, r2 = r2, r
+	}
+	return width
+}
+
+// StringWidth return width as you can see
+func (c *Condition) StringWidth(s string) (width int) {
+	if c.ZeroWidthJoiner {
+		return c.stringWidthZeroJoiner(s)
+	}
+	return c.stringWidth(s)
+}
+
+// Truncate return string truncated with w cells
+func (c *Condition) Truncate(s string, w int, tail string) string {
+	if c.StringWidth(s) <= w {
+		return s
+	}
+	r := []rune(s)
+	tw := c.StringWidth(tail)
+	w -= tw
+	width := 0
+	i := 0
+	for ; i < len(r); i++ {
+		cw := c.RuneWidth(r[i])
+		if width+cw > w {
+			break
+		}
+		width += cw
+	}
+	return string(r[0:i]) + tail
+}
+
+// Wrap return string wrapped with w cells
+func (c *Condition) Wrap(s string, w int) string {
+	width := 0
+	out := ""
+	for _, r := range []rune(s) {
+		cw := RuneWidth(r)
+		if r == '\n' {
+			out += string(r)
+			width = 0
+			continue
+		} else if width+cw > w {
+			out += "\n"
+			width = 0
+			out += string(r)
+			width += cw
+			continue
+		}
+		out += string(r)
+		width += cw
+	}
+	return out
+}
+
+// FillLeft return string filled in left by spaces in w cells
+func (c *Condition) FillLeft(s string, w int) string {
+	width := c.StringWidth(s)
+	count := w - width
+	if count > 0 {
+		b := make([]byte, count)
+		for i := range b {
+			b[i] = ' '
+		}
+		return string(b) + s
+	}
+	return s
+}
+
+// FillRight return string filled in left by spaces in w cells
+func (c *Condition) FillRight(s string, w int) string {
+	width := c.StringWidth(s)
+	count := w - width
+	if count > 0 {
+		b := make([]byte, count)
+		for i := range b {
+			b[i] = ' '
+		}
+		return s + string(b)
+	}
+	return s
+}
+
+// RuneWidth returns the number of cells in r.
+// See http://www.unicode.org/reports/tr11/
+func RuneWidth(r rune) int {
+	return DefaultCondition.RuneWidth(r)
+}
+
+// IsAmbiguousWidth returns whether is ambiguous width or not.
+func IsAmbiguousWidth(r rune) bool {
+	return inTables(r, private, ambiguous)
+}
+
+// IsNeutralWidth returns whether is neutral width or not.
+func IsNeutralWidth(r rune) bool {
+	return inTable(r, neutral)
+}
+
+// StringWidth return width as you can see
+func StringWidth(s string) (width int) {
+	return DefaultCondition.StringWidth(s)
+}
+
+// Truncate return string truncated with w cells
+func Truncate(s string, w int, tail string) string {
+	return DefaultCondition.Truncate(s, w, tail)
+}
+
+// Wrap return string wrapped with w cells
+func Wrap(s string, w int) string {
+	return DefaultCondition.Wrap(s, w)
+}
+
+// FillLeft return string filled in left by spaces in w cells
+func FillLeft(s string, w int) string {
+	return DefaultCondition.FillLeft(s, w)
+}
+
+// FillRight return string filled in left by spaces in w cells
+func FillRight(s string, w int) string {
+	return DefaultCondition.FillRight(s, w)
+}
--- a/vendor/github.com/mattn/go-runewidth/runewidth_appengine.go
+++ b/vendor/github.com/mattn/go-runewidth/runewidth_appengine.go
@ -0,0 +1,8 @@
+// +build appengine
+
+package runewidth
+
+// IsEastAsian return true if the current locale is CJK
+func IsEastAsian() bool {
+	return false
+}
--- a/vendor/github.com/mattn/go-runewidth/runewidth_js.go
+++ b/vendor/github.com/mattn/go-runewidth/runewidth_js.go
@ -0,0 +1,9 @@
+// +build js
+// +build !appengine
+
+package runewidth
+
+func IsEastAsian() bool {
+	// TODO: Implement this for the web. Detect east asian in a compatible way, and return true.
+	return false
+}
--- a/vendor/github.com/mattn/go-runewidth/runewidth_posix.go
+++ b/vendor/github.com/mattn/go-runewidth/runewidth_posix.go
@ -0,0 +1,79 @@
+// +build !windows
+// +build !js
+// +build !appengine
+
+package runewidth
+
+import (
+	"os"
+	"regexp"
+	"strings"
+)
+
+var reLoc = regexp.MustCompile(`^[a-z][a-z][a-z]?(?:_[A-Z][A-Z])?\.(.+)`)
+
+var mblenTable = map[string]int{
+	"utf-8":   6,
+	"utf8":    6,
+	"jis":     8,
+	"eucjp":   3,
+	"euckr":   2,
+	"euccn":   2,
+	"sjis":    2,
+	"cp932":   2,
+	"cp51932": 2,
+	"cp936":   2,
+	"cp949":   2,
+	"cp950":   2,
+	"big5":    2,
+	"gbk":     2,
+	"gb2312":  2,
+}
+
+func isEastAsian(locale string) bool {
+	charset := strings.ToLower(locale)
+	r := reLoc.FindStringSubmatch(locale)
+	if len(r) == 2 {
+		charset = strings.ToLower(r[1])
+	}
+
+	if strings.HasSuffix(charset, "@cjk_narrow") {
+		return false
+	}
+
+	for pos, b := range []byte(charset) {
+		if b == '@' {
+			charset = charset[:pos]
+			break
+		}
+	}
+	max := 1
+	if m, ok := mblenTable[charset]; ok {
+		max = m
+	}
+	if max > 1 && (charset[0] != 'u' ||
+		strings.HasPrefix(locale, "ja") ||
+		strings.HasPrefix(locale, "ko") ||
+		strings.HasPrefix(locale, "zh")) {
+		return true
+	}
+	return false
+}
+
+// IsEastAsian return true if the current locale is CJK
+func IsEastAsian() bool {
+	locale := os.Getenv("LC_CTYPE")
+	if locale == "" {
+		locale = os.Getenv("LANG")
+	}
+
+	// ignore C locale
+	if locale == "POSIX" || locale == "C" {
+		return false
+	}
+	if len(locale) > 1 && locale[0] == 'C' && (locale[1] == '.' || locale[1] == '-') {
+		return false
+	}
+
+	return isEastAsian(locale)
+}
--- a/vendor/github.com/mattn/go-runewidth/runewidth_table.go
+++ b/vendor/github.com/mattn/go-runewidth/runewidth_table.go
@ -0,0 +1,427 @@
+package runewidth
+
+var combining = table{
+	{0x0300, 0x036F}, {0x0483, 0x0489}, {0x07EB, 0x07F3},
+	{0x0C00, 0x0C00}, {0x0C04, 0x0C04}, {0x0D00, 0x0D01},
+	{0x135D, 0x135F}, {0x1A7F, 0x1A7F}, {0x1AB0, 0x1ABE},
+	{0x1B6B, 0x1B73}, {0x1DC0, 0x1DF9}, {0x1DFB, 0x1DFF},
+	{0x20D0, 0x20F0}, {0x2CEF, 0x2CF1}, {0x2DE0, 0x2DFF},
+	{0x3099, 0x309A}, {0xA66F, 0xA672}, {0xA674, 0xA67D},
+	{0xA69E, 0xA69F}, {0xA6F0, 0xA6F1}, {0xA8E0, 0xA8F1},
+	{0xFE20, 0xFE2F}, {0x101FD, 0x101FD}, {0x10376, 0x1037A},
+	{0x10F46, 0x10F50}, {0x11300, 0x11301}, {0x1133B, 0x1133C},
+	{0x11366, 0x1136C}, {0x11370, 0x11374}, {0x16AF0, 0x16AF4},
+	{0x1D165, 0x1D169}, {0x1D16D, 0x1D172}, {0x1D17B, 0x1D182},
+	{0x1D185, 0x1D18B}, {0x1D1AA, 0x1D1AD}, {0x1D242, 0x1D244},
+	{0x1E000, 0x1E006}, {0x1E008, 0x1E018}, {0x1E01B, 0x1E021},
+	{0x1E023, 0x1E024}, {0x1E026, 0x1E02A}, {0x1E8D0, 0x1E8D6},
+}
+
+var doublewidth = table{
+	{0x1100, 0x115F}, {0x231A, 0x231B}, {0x2329, 0x232A},
+	{0x23E9, 0x23EC}, {0x23F0, 0x23F0}, {0x23F3, 0x23F3},
+	{0x25FD, 0x25FE}, {0x2614, 0x2615}, {0x2648, 0x2653},
+	{0x267F, 0x267F}, {0x2693, 0x2693}, {0x26A1, 0x26A1},
+	{0x26AA, 0x26AB}, {0x26BD, 0x26BE}, {0x26C4, 0x26C5},
+	{0x26CE, 0x26CE}, {0x26D4, 0x26D4}, {0x26EA, 0x26EA},
+	{0x26F2, 0x26F3}, {0x26F5, 0x26F5}, {0x26FA, 0x26FA},
+	{0x26FD, 0x26FD}, {0x2705, 0x2705}, {0x270A, 0x270B},
+	{0x2728, 0x2728}, {0x274C, 0x274C}, {0x274E, 0x274E},
+	{0x2753, 0x2755}, {0x2757, 0x2757}, {0x2795, 0x2797},
+	{0x27B0, 0x27B0}, {0x27BF, 0x27BF}, {0x2B1B, 0x2B1C},
+	{0x2B50, 0x2B50}, {0x2B55, 0x2B55}, {0x2E80, 0x2E99},
+	{0x2E9B, 0x2EF3}, {0x2F00, 0x2FD5}, {0x2FF0, 0x2FFB},
+	{0x3000, 0x303E}, {0x3041, 0x3096}, {0x3099, 0x30FF},
+	{0x3105, 0x312F}, {0x3131, 0x318E}, {0x3190, 0x31BA},
+	{0x31C0, 0x31E3}, {0x31F0, 0x321E}, {0x3220, 0x3247},
+	{0x3250, 0x4DBF}, {0x4E00, 0xA48C}, {0xA490, 0xA4C6},
+	{0xA960, 0xA97C}, {0xAC00, 0xD7A3}, {0xF900, 0xFAFF},
+	{0xFE10, 0xFE19}, {0xFE30, 0xFE52}, {0xFE54, 0xFE66},
+	{0xFE68, 0xFE6B}, {0xFF01, 0xFF60}, {0xFFE0, 0xFFE6},
+	{0x16FE0, 0x16FE3}, {0x17000, 0x187F7}, {0x18800, 0x18AF2},
+	{0x1B000, 0x1B11E}, {0x1B150, 0x1B152}, {0x1B164, 0x1B167},
+	{0x1B170, 0x1B2FB}, {0x1F004, 0x1F004}, {0x1F0CF, 0x1F0CF},
+	{0x1F18E, 0x1F18E}, {0x1F191, 0x1F19A}, {0x1F200, 0x1F202},
+	{0x1F210, 0x1F23B}, {0x1F240, 0x1F248}, {0x1F250, 0x1F251},
+	{0x1F260, 0x1F265}, {0x1F300, 0x1F320}, {0x1F32D, 0x1F335},
+	{0x1F337, 0x1F37C}, {0x1F37E, 0x1F393}, {0x1F3A0, 0x1F3CA},
+	{0x1F3CF, 0x1F3D3}, {0x1F3E0, 0x1F3F0}, {0x1F3F4, 0x1F3F4},
+	{0x1F3F8, 0x1F43E}, {0x1F440, 0x1F440}, {0x1F442, 0x1F4FC},
+	{0x1F4FF, 0x1F53D}, {0x1F54B, 0x1F54E}, {0x1F550, 0x1F567},
+	{0x1F57A, 0x1F57A}, {0x1F595, 0x1F596}, {0x1F5A4, 0x1F5A4},
+	{0x1F5FB, 0x1F64F}, {0x1F680, 0x1F6C5}, {0x1F6CC, 0x1F6CC},
+	{0x1F6D0, 0x1F6D2}, {0x1F6D5, 0x1F6D5}, {0x1F6EB, 0x1F6EC},
+	{0x1F6F4, 0x1F6FA}, {0x1F7E0, 0x1F7EB}, {0x1F90D, 0x1F971},
+	{0x1F973, 0x1F976}, {0x1F97A, 0x1F9A2}, {0x1F9A5, 0x1F9AA},
+	{0x1F9AE, 0x1F9CA}, {0x1F9CD, 0x1F9FF}, {0x1FA70, 0x1FA73},
+	{0x1FA78, 0x1FA7A}, {0x1FA80, 0x1FA82}, {0x1FA90, 0x1FA95},
+	{0x20000, 0x2FFFD}, {0x30000, 0x3FFFD},
+}
+
+var ambiguous = table{
+	{0x00A1, 0x00A1}, {0x00A4, 0x00A4}, {0x00A7, 0x00A8},
+	{0x00AA, 0x00AA}, {0x00AD, 0x00AE}, {0x00B0, 0x00B4},
+	{0x00B6, 0x00BA}, {0x00BC, 0x00BF}, {0x00C6, 0x00C6},
+	{0x00D0, 0x00D0}, {0x00D7, 0x00D8}, {0x00DE, 0x00E1},
+	{0x00E6, 0x00E6}, {0x00E8, 0x00EA}, {0x00EC, 0x00ED},
+	{0x00F0, 0x00F0}, {0x00F2, 0x00F3}, {0x00F7, 0x00FA},
+	{0x00FC, 0x00FC}, {0x00FE, 0x00FE}, {0x0101, 0x0101},
+	{0x0111, 0x0111}, {0x0113, 0x0113}, {0x011B, 0x011B},
+	{0x0126, 0x0127}, {0x012B, 0x012B}, {0x0131, 0x0133},
+	{0x0138, 0x0138}, {0x013F, 0x0142}, {0x0144, 0x0144},
+	{0x0148, 0x014B}, {0x014D, 0x014D}, {0x0152, 0x0153},
+	{0x0166, 0x0167}, {0x016B, 0x016B}, {0x01CE, 0x01CE},
+	{0x01D0, 0x01D0}, {0x01D2, 0x01D2}, {0x01D4, 0x01D4},
+	{0x01D6, 0x01D6}, {0x01D8, 0x01D8}, {0x01DA, 0x01DA},
+	{0x01DC, 0x01DC}, {0x0251, 0x0251}, {0x0261, 0x0261},
+	{0x02C4, 0x02C4}, {0x02C7, 0x02C7}, {0x02C9, 0x02CB},
+	{0x02CD, 0x02CD}, {0x02D0, 0x02D0}, {0x02D8, 0x02DB},
+	{0x02DD, 0x02DD}, {0x02DF, 0x02DF}, {0x0300, 0x036F},
+	{0x0391, 0x03A1}, {0x03A3, 0x03A9}, {0x03B1, 0x03C1},
+	{0x03C3, 0x03C9}, {0x0401, 0x0401}, {0x0410, 0x044F},
+	{0x0451, 0x0451}, {0x2010, 0x2010}, {0x2013, 0x2016},
+	{0x2018, 0x2019}, {0x201C, 0x201D}, {0x2020, 0x2022},
+	{0x2024, 0x2027}, {0x2030, 0x2030}, {0x2032, 0x2033},
+	{0x2035, 0x2035}, {0x203B, 0x203B}, {0x203E, 0x203E},
+	{0x2074, 0x2074}, {0x207F, 0x207F}, {0x2081, 0x2084},
+	{0x20AC, 0x20AC}, {0x2103, 0x2103}, {0x2105, 0x2105},
+	{0x2109, 0x2109}, {0x2113, 0x2113}, {0x2116, 0x2116},
+	{0x2121, 0x2122}, {0x2126, 0x2126}, {0x212B, 0x212B},
+	{0x2153, 0x2154}, {0x215B, 0x215E}, {0x2160, 0x216B},
+	{0x2170, 0x2179}, {0x2189, 0x2189}, {0x2190, 0x2199},
+	{0x21B8, 0x21B9}, {0x21D2, 0x21D2}, {0x21D4, 0x21D4},
+	{0x21E7, 0x21E7}, {0x2200, 0x2200}, {0x2202, 0x2203},
+	{0x2207, 0x2208}, {0x220B, 0x220B}, {0x220F, 0x220F},
+	{0x2211, 0x2211}, {0x2215, 0x2215}, {0x221A, 0x221A},
+	{0x221D, 0x2220}, {0x2223, 0x2223}, {0x2225, 0x2225},
+	{0x2227, 0x222C}, {0x222E, 0x222E}, {0x2234, 0x2237},
+	{0x223C, 0x223D}, {0x2248, 0x2248}, {0x224C, 0x224C},
+	{0x2252, 0x2252}, {0x2260, 0x2261}, {0x2264, 0x2267},
+	{0x226A, 0x226B}, {0x226E, 0x226F}, {0x2282, 0x2283},
+	{0x2286, 0x2287}, {0x2295, 0x2295}, {0x2299, 0x2299},
+	{0x22A5, 0x22A5}, {0x22BF, 0x22BF}, {0x2312, 0x2312},
+	{0x2460, 0x24E9}, {0x24EB, 0x254B}, {0x2550, 0x2573},
+	{0x2580, 0x258F}, {0x2592, 0x2595}, {0x25A0, 0x25A1},
+	{0x25A3, 0x25A9}, {0x25B2, 0x25B3}, {0x25B6, 0x25B7},
+	{0x25BC, 0x25BD}, {0x25C0, 0x25C1}, {0x25C6, 0x25C8},
+	{0x25CB, 0x25CB}, {0x25CE, 0x25D1}, {0x25E2, 0x25E5},
+	{0x25EF, 0x25EF}, {0x2605, 0x2606}, {0x2609, 0x2609},
+	{0x260E, 0x260F}, {0x261C, 0x261C}, {0x261E, 0x261E},
+	{0x2640, 0x2640}, {0x2642, 0x2642}, {0x2660, 0x2661},
+	{0x2663, 0x2665}, {0x2667, 0x266A}, {0x266C, 0x266D},
+	{0x266F, 0x266F}, {0x269E, 0x269F}, {0x26BF, 0x26BF},
+	{0x26C6, 0x26CD}, {0x26CF, 0x26D3}, {0x26D5, 0x26E1},
+	{0x26E3, 0x26E3}, {0x26E8, 0x26E9}, {0x26EB, 0x26F1},
+	{0x26F4, 0x26F4}, {0x26F6, 0x26F9}, {0x26FB, 0x26FC},
+	{0x26FE, 0x26FF}, {0x273D, 0x273D}, {0x2776, 0x277F},
+	{0x2B56, 0x2B59}, {0x3248, 0x324F}, {0xE000, 0xF8FF},
+	{0xFE00, 0xFE0F}, {0xFFFD, 0xFFFD}, {0x1F100, 0x1F10A},
+	{0x1F110, 0x1F12D}, {0x1F130, 0x1F169}, {0x1F170, 0x1F18D},
+	{0x1F18F, 0x1F190}, {0x1F19B, 0x1F1AC}, {0xE0100, 0xE01EF},
+	{0xF0000, 0xFFFFD}, {0x100000, 0x10FFFD},
+}
+var notassigned = table{
+	{0x27E6, 0x27ED}, {0x2985, 0x2986},
+}
+
+var neutral = table{
+	{0x0000, 0x001F}, {0x007F, 0x00A0}, {0x00A9, 0x00A9},
+	{0x00AB, 0x00AB}, {0x00B5, 0x00B5}, {0x00BB, 0x00BB},
+	{0x00C0, 0x00C5}, {0x00C7, 0x00CF}, {0x00D1, 0x00D6},
+	{0x00D9, 0x00DD}, {0x00E2, 0x00E5}, {0x00E7, 0x00E7},
+	{0x00EB, 0x00EB}, {0x00EE, 0x00EF}, {0x00F1, 0x00F1},
+	{0x00F4, 0x00F6}, {0x00FB, 0x00FB}, {0x00FD, 0x00FD},
+	{0x00FF, 0x0100}, {0x0102, 0x0110}, {0x0112, 0x0112},
+	{0x0114, 0x011A}, {0x011C, 0x0125}, {0x0128, 0x012A},
+	{0x012C, 0x0130}, {0x0134, 0x0137}, {0x0139, 0x013E},
+	{0x0143, 0x0143}, {0x0145, 0x0147}, {0x014C, 0x014C},
+	{0x014E, 0x0151}, {0x0154, 0x0165}, {0x0168, 0x016A},
+	{0x016C, 0x01CD}, {0x01CF, 0x01CF}, {0x01D1, 0x01D1},
+	{0x01D3, 0x01D3}, {0x01D5, 0x01D5}, {0x01D7, 0x01D7},
+	{0x01D9, 0x01D9}, {0x01DB, 0x01DB}, {0x01DD, 0x0250},
+	{0x0252, 0x0260}, {0x0262, 0x02C3}, {0x02C5, 0x02C6},
+	{0x02C8, 0x02C8}, {0x02CC, 0x02CC}, {0x02CE, 0x02CF},
+	{0x02D1, 0x02D7}, {0x02DC, 0x02DC}, {0x02DE, 0x02DE},
+	{0x02E0, 0x02FF}, {0x0370, 0x0377}, {0x037A, 0x037F},
+	{0x0384, 0x038A}, {0x038C, 0x038C}, {0x038E, 0x0390},
+	{0x03AA, 0x03B0}, {0x03C2, 0x03C2}, {0x03CA, 0x0400},
+	{0x0402, 0x040F}, {0x0450, 0x0450}, {0x0452, 0x052F},
+	{0x0531, 0x0556}, {0x0559, 0x058A}, {0x058D, 0x058F},
+	{0x0591, 0x05C7}, {0x05D0, 0x05EA}, {0x05EF, 0x05F4},
+	{0x0600, 0x061C}, {0x061E, 0x070D}, {0x070F, 0x074A},
+	{0x074D, 0x07B1}, {0x07C0, 0x07FA}, {0x07FD, 0x082D},
+	{0x0830, 0x083E}, {0x0840, 0x085B}, {0x085E, 0x085E},
+	{0x0860, 0x086A}, {0x08A0, 0x08B4}, {0x08B6, 0x08BD},
+	{0x08D3, 0x0983}, {0x0985, 0x098C}, {0x098F, 0x0990},
+	{0x0993, 0x09A8}, {0x09AA, 0x09B0}, {0x09B2, 0x09B2},
+	{0x09B6, 0x09B9}, {0x09BC, 0x09C4}, {0x09C7, 0x09C8},
+	{0x09CB, 0x09CE}, {0x09D7, 0x09D7}, {0x09DC, 0x09DD},
+	{0x09DF, 0x09E3}, {0x09E6, 0x09FE}, {0x0A01, 0x0A03},
+	{0x0A05, 0x0A0A}, {0x0A0F, 0x0A10}, {0x0A13, 0x0A28},
+	{0x0A2A, 0x0A30}, {0x0A32, 0x0A33}, {0x0A35, 0x0A36},
+	{0x0A38, 0x0A39}, {0x0A3C, 0x0A3C}, {0x0A3E, 0x0A42},
+	{0x0A47, 0x0A48}, {0x0A4B, 0x0A4D}, {0x0A51, 0x0A51},
+	{0x0A59, 0x0A5C}, {0x0A5E, 0x0A5E}, {0x0A66, 0x0A76},
+	{0x0A81, 0x0A83}, {0x0A85, 0x0A8D}, {0x0A8F, 0x0A91},
+	{0x0A93, 0x0AA8}, {0x0AAA, 0x0AB0}, {0x0AB2, 0x0AB3},
+	{0x0AB5, 0x0AB9}, {0x0ABC, 0x0AC5}, {0x0AC7, 0x0AC9},
+	{0x0ACB, 0x0ACD}, {0x0AD0, 0x0AD0}, {0x0AE0, 0x0AE3},
+	{0x0AE6, 0x0AF1}, {0x0AF9, 0x0AFF}, {0x0B01, 0x0B03},
+	{0x0B05, 0x0B0C}, {0x0B0F, 0x0B10}, {0x0B13, 0x0B28},
+	{0x0B2A, 0x0B30}, {0x0B32, 0x0B33}, {0x0B35, 0x0B39},
+	{0x0B3C, 0x0B44}, {0x0B47, 0x0B48}, {0x0B4B, 0x0B4D},
+	{0x0B56, 0x0B57}, {0x0B5C, 0x0B5D}, {0x0B5F, 0x0B63},
+	{0x0B66, 0x0B77}, {0x0B82, 0x0B83}, {0x0B85, 0x0B8A},
+	{0x0B8E, 0x0B90}, {0x0B92, 0x0B95}, {0x0B99, 0x0B9A},
+	{0x0B9C, 0x0B9C}, {0x0B9E, 0x0B9F}, {0x0BA3, 0x0BA4},
+	{0x0BA8, 0x0BAA}, {0x0BAE, 0x0BB9}, {0x0BBE, 0x0BC2},
+	{0x0BC6, 0x0BC8}, {0x0BCA, 0x0BCD}, {0x0BD0, 0x0BD0},
+	{0x0BD7, 0x0BD7}, {0x0BE6, 0x0BFA}, {0x0C00, 0x0C0C},
+	{0x0C0E, 0x0C10}, {0x0C12, 0x0C28}, {0x0C2A, 0x0C39},
+	{0x0C3D, 0x0C44}, {0x0C46, 0x0C48}, {0x0C4A, 0x0C4D},
+	{0x0C55, 0x0C56}, {0x0C58, 0x0C5A}, {0x0C60, 0x0C63},
+	{0x0C66, 0x0C6F}, {0x0C77, 0x0C8C}, {0x0C8E, 0x0C90},
+	{0x0C92, 0x0CA8}, {0x0CAA, 0x0CB3}, {0x0CB5, 0x0CB9},
+	{0x0CBC, 0x0CC4}, {0x0CC6, 0x0CC8}, {0x0CCA, 0x0CCD},
+	{0x0CD5, 0x0CD6}, {0x0CDE, 0x0CDE}, {0x0CE0, 0x0CE3},
+	{0x0CE6, 0x0CEF}, {0x0CF1, 0x0CF2}, {0x0D00, 0x0D03},
+	{0x0D05, 0x0D0C}, {0x0D0E, 0x0D10}, {0x0D12, 0x0D44},
+	{0x0D46, 0x0D48}, {0x0D4A, 0x0D4F}, {0x0D54, 0x0D63},
+	{0x0D66, 0x0D7F}, {0x0D82, 0x0D83}, {0x0D85, 0x0D96},
+	{0x0D9A, 0x0DB1}, {0x0DB3, 0x0DBB}, {0x0DBD, 0x0DBD},
+	{0x0DC0, 0x0DC6}, {0x0DCA, 0x0DCA}, {0x0DCF, 0x0DD4},
+	{0x0DD6, 0x0DD6}, {0x0DD8, 0x0DDF}, {0x0DE6, 0x0DEF},
+	{0x0DF2, 0x0DF4}, {0x0E01, 0x0E3A}, {0x0E3F, 0x0E5B},
+	{0x0E81, 0x0E82}, {0x0E84, 0x0E84}, {0x0E86, 0x0E8A},
+	{0x0E8C, 0x0EA3}, {0x0EA5, 0x0EA5}, {0x0EA7, 0x0EBD},
+	{0x0EC0, 0x0EC4}, {0x0EC6, 0x0EC6}, {0x0EC8, 0x0ECD},
+	{0x0ED0, 0x0ED9}, {0x0EDC, 0x0EDF}, {0x0F00, 0x0F47},
+	{0x0F49, 0x0F6C}, {0x0F71, 0x0F97}, {0x0F99, 0x0FBC},
+	{0x0FBE, 0x0FCC}, {0x0FCE, 0x0FDA}, {0x1000, 0x10C5},
+	{0x10C7, 0x10C7}, {0x10CD, 0x10CD}, {0x10D0, 0x10FF},
+	{0x1160, 0x1248}, {0x124A, 0x124D}, {0x1250, 0x1256},
+	{0x1258, 0x1258}, {0x125A, 0x125D}, {0x1260, 0x1288},
+	{0x128A, 0x128D}, {0x1290, 0x12B0}, {0x12B2, 0x12B5},
+	{0x12B8, 0x12BE}, {0x12C0, 0x12C0}, {0x12C2, 0x12C5},
+	{0x12C8, 0x12D6}, {0x12D8, 0x1310}, {0x1312, 0x1315},
+	{0x1318, 0x135A}, {0x135D, 0x137C}, {0x1380, 0x1399},
+	{0x13A0, 0x13F5}, {0x13F8, 0x13FD}, {0x1400, 0x169C},
+	{0x16A0, 0x16F8}, {0x1700, 0x170C}, {0x170E, 0x1714},
+	{0x1720, 0x1736}, {0x1740, 0x1753}, {0x1760, 0x176C},
+	{0x176E, 0x1770}, {0x1772, 0x1773}, {0x1780, 0x17DD},
+	{0x17E0, 0x17E9}, {0x17F0, 0x17F9}, {0x1800, 0x180E},
+	{0x1810, 0x1819}, {0x1820, 0x1878}, {0x1880, 0x18AA},
+	{0x18B0, 0x18F5}, {0x1900, 0x191E}, {0x1920, 0x192B},
+	{0x1930, 0x193B}, {0x1940, 0x1940}, {0x1944, 0x196D},
+	{0x1970, 0x1974}, {0x1980, 0x19AB}, {0x19B0, 0x19C9},
+	{0x19D0, 0x19DA}, {0x19DE, 0x1A1B}, {0x1A1E, 0x1A5E},
+	{0x1A60, 0x1A7C}, {0x1A7F, 0x1A89}, {0x1A90, 0x1A99},
+	{0x1AA0, 0x1AAD}, {0x1AB0, 0x1ABE}, {0x1B00, 0x1B4B},
+	{0x1B50, 0x1B7C}, {0x1B80, 0x1BF3}, {0x1BFC, 0x1C37},
+	{0x1C3B, 0x1C49}, {0x1C4D, 0x1C88}, {0x1C90, 0x1CBA},
+	{0x1CBD, 0x1CC7}, {0x1CD0, 0x1CFA}, {0x1D00, 0x1DF9},
+	{0x1DFB, 0x1F15}, {0x1F18, 0x1F1D}, {0x1F20, 0x1F45},
+	{0x1F48, 0x1F4D}, {0x1F50, 0x1F57}, {0x1F59, 0x1F59},
+	{0x1F5B, 0x1F5B}, {0x1F5D, 0x1F5D}, {0x1F5F, 0x1F7D},
+	{0x1F80, 0x1FB4}, {0x1FB6, 0x1FC4}, {0x1FC6, 0x1FD3},
+	{0x1FD6, 0x1FDB}, {0x1FDD, 0x1FEF}, {0x1FF2, 0x1FF4},
+	{0x1FF6, 0x1FFE}, {0x2000, 0x200F}, {0x2011, 0x2012},
+	{0x2017, 0x2017}, {0x201A, 0x201B}, {0x201E, 0x201F},
+	{0x2023, 0x2023}, {0x2028, 0x202F}, {0x2031, 0x2031},
+	{0x2034, 0x2034}, {0x2036, 0x203A}, {0x203C, 0x203D},
+	{0x203F, 0x2064}, {0x2066, 0x2071}, {0x2075, 0x207E},
+	{0x2080, 0x2080}, {0x2085, 0x208E}, {0x2090, 0x209C},
+	{0x20A0, 0x20A8}, {0x20AA, 0x20AB}, {0x20AD, 0x20BF},
+	{0x20D0, 0x20F0}, {0x2100, 0x2102}, {0x2104, 0x2104},
+	{0x2106, 0x2108}, {0x210A, 0x2112}, {0x2114, 0x2115},
+	{0x2117, 0x2120}, {0x2123, 0x2125}, {0x2127, 0x212A},
+	{0x212C, 0x2152}, {0x2155, 0x215A}, {0x215F, 0x215F},
+	{0x216C, 0x216F}, {0x217A, 0x2188}, {0x218A, 0x218B},
+	{0x219A, 0x21B7}, {0x21BA, 0x21D1}, {0x21D3, 0x21D3},
+	{0x21D5, 0x21E6}, {0x21E8, 0x21FF}, {0x2201, 0x2201},
+	{0x2204, 0x2206}, {0x2209, 0x220A}, {0x220C, 0x220E},
+	{0x2210, 0x2210}, {0x2212, 0x2214}, {0x2216, 0x2219},
+	{0x221B, 0x221C}, {0x2221, 0x2222}, {0x2224, 0x2224},
+	{0x2226, 0x2226}, {0x222D, 0x222D}, {0x222F, 0x2233},
+	{0x2238, 0x223B}, {0x223E, 0x2247}, {0x2249, 0x224B},
+	{0x224D, 0x2251}, {0x2253, 0x225F}, {0x2262, 0x2263},
+	{0x2268, 0x2269}, {0x226C, 0x226D}, {0x2270, 0x2281},
+	{0x2284, 0x2285}, {0x2288, 0x2294}, {0x2296, 0x2298},
+	{0x229A, 0x22A4}, {0x22A6, 0x22BE}, {0x22C0, 0x2311},
+	{0x2313, 0x2319}, {0x231C, 0x2328}, {0x232B, 0x23E8},
+	{0x23ED, 0x23EF}, {0x23F1, 0x23F2}, {0x23F4, 0x2426},
+	{0x2440, 0x244A}, {0x24EA, 0x24EA}, {0x254C, 0x254F},
+	{0x2574, 0x257F}, {0x2590, 0x2591}, {0x2596, 0x259F},
+	{0x25A2, 0x25A2}, {0x25AA, 0x25B1}, {0x25B4, 0x25B5},
+	{0x25B8, 0x25BB}, {0x25BE, 0x25BF}, {0x25C2, 0x25C5},
+	{0x25C9, 0x25CA}, {0x25CC, 0x25CD}, {0x25D2, 0x25E1},
+	{0x25E6, 0x25EE}, {0x25F0, 0x25FC}, {0x25FF, 0x2604},
+	{0x2607, 0x2608}, {0x260A, 0x260D}, {0x2610, 0x2613},
+	{0x2616, 0x261B}, {0x261D, 0x261D}, {0x261F, 0x263F},
+	{0x2641, 0x2641}, {0x2643, 0x2647}, {0x2654, 0x265F},
+	{0x2662, 0x2662}, {0x2666, 0x2666}, {0x266B, 0x266B},
+	{0x266E, 0x266E}, {0x2670, 0x267E}, {0x2680, 0x2692},
+	{0x2694, 0x269D}, {0x26A0, 0x26A0}, {0x26A2, 0x26A9},
+	{0x26AC, 0x26BC}, {0x26C0, 0x26C3}, {0x26E2, 0x26E2},
+	{0x26E4, 0x26E7}, {0x2700, 0x2704}, {0x2706, 0x2709},
+	{0x270C, 0x2727}, {0x2729, 0x273C}, {0x273E, 0x274B},
+	{0x274D, 0x274D}, {0x274F, 0x2752}, {0x2756, 0x2756},
+	{0x2758, 0x2775}, {0x2780, 0x2794}, {0x2798, 0x27AF},
+	{0x27B1, 0x27BE}, {0x27C0, 0x27E5}, {0x27EE, 0x2984},
+	{0x2987, 0x2B1A}, {0x2B1D, 0x2B4F}, {0x2B51, 0x2B54},
+	{0x2B5A, 0x2B73}, {0x2B76, 0x2B95}, {0x2B98, 0x2C2E},
+	{0x2C30, 0x2C5E}, {0x2C60, 0x2CF3}, {0x2CF9, 0x2D25},
+	{0x2D27, 0x2D27}, {0x2D2D, 0x2D2D}, {0x2D30, 0x2D67},
+	{0x2D6F, 0x2D70}, {0x2D7F, 0x2D96}, {0x2DA0, 0x2DA6},
+	{0x2DA8, 0x2DAE}, {0x2DB0, 0x2DB6}, {0x2DB8, 0x2DBE},
+	{0x2DC0, 0x2DC6}, {0x2DC8, 0x2DCE}, {0x2DD0, 0x2DD6},
+	{0x2DD8, 0x2DDE}, {0x2DE0, 0x2E4F}, {0x303F, 0x303F},
+	{0x4DC0, 0x4DFF}, {0xA4D0, 0xA62B}, {0xA640, 0xA6F7},
+	{0xA700, 0xA7BF}, {0xA7C2, 0xA7C6}, {0xA7F7, 0xA82B},
+	{0xA830, 0xA839}, {0xA840, 0xA877}, {0xA880, 0xA8C5},
+	{0xA8CE, 0xA8D9}, {0xA8E0, 0xA953}, {0xA95F, 0xA95F},
+	{0xA980, 0xA9CD}, {0xA9CF, 0xA9D9}, {0xA9DE, 0xA9FE},
+	{0xAA00, 0xAA36}, {0xAA40, 0xAA4D}, {0xAA50, 0xAA59},
+	{0xAA5C, 0xAAC2}, {0xAADB, 0xAAF6}, {0xAB01, 0xAB06},
+	{0xAB09, 0xAB0E}, {0xAB11, 0xAB16}, {0xAB20, 0xAB26},
+	{0xAB28, 0xAB2E}, {0xAB30, 0xAB67}, {0xAB70, 0xABED},
+	{0xABF0, 0xABF9}, {0xD7B0, 0xD7C6}, {0xD7CB, 0xD7FB},
+	{0xD800, 0xDFFF}, {0xFB00, 0xFB06}, {0xFB13, 0xFB17},
+	{0xFB1D, 0xFB36}, {0xFB38, 0xFB3C}, {0xFB3E, 0xFB3E},
+	{0xFB40, 0xFB41}, {0xFB43, 0xFB44}, {0xFB46, 0xFBC1},
+	{0xFBD3, 0xFD3F}, {0xFD50, 0xFD8F}, {0xFD92, 0xFDC7},
+	{0xFDF0, 0xFDFD}, {0xFE20, 0xFE2F}, {0xFE70, 0xFE74},
+	{0xFE76, 0xFEFC}, {0xFEFF, 0xFEFF}, {0xFFF9, 0xFFFC},
+	{0x10000, 0x1000B}, {0x1000D, 0x10026}, {0x10028, 0x1003A},
+	{0x1003C, 0x1003D}, {0x1003F, 0x1004D}, {0x10050, 0x1005D},
+	{0x10080, 0x100FA}, {0x10100, 0x10102}, {0x10107, 0x10133},
+	{0x10137, 0x1018E}, {0x10190, 0x1019B}, {0x101A0, 0x101A0},
+	{0x101D0, 0x101FD}, {0x10280, 0x1029C}, {0x102A0, 0x102D0},
+	{0x102E0, 0x102FB}, {0x10300, 0x10323}, {0x1032D, 0x1034A},
+	{0x10350, 0x1037A}, {0x10380, 0x1039D}, {0x1039F, 0x103C3},
+	{0x103C8, 0x103D5}, {0x10400, 0x1049D}, {0x104A0, 0x104A9},
+	{0x104B0, 0x104D3}, {0x104D8, 0x104FB}, {0x10500, 0x10527},
+	{0x10530, 0x10563}, {0x1056F, 0x1056F}, {0x10600, 0x10736},
+	{0x10740, 0x10755}, {0x10760, 0x10767}, {0x10800, 0x10805},
+	{0x10808, 0x10808}, {0x1080A, 0x10835}, {0x10837, 0x10838},
+	{0x1083C, 0x1083C}, {0x1083F, 0x10855}, {0x10857, 0x1089E},
+	{0x108A7, 0x108AF}, {0x108E0, 0x108F2}, {0x108F4, 0x108F5},
+	{0x108FB, 0x1091B}, {0x1091F, 0x10939}, {0x1093F, 0x1093F},
+	{0x10980, 0x109B7}, {0x109BC, 0x109CF}, {0x109D2, 0x10A03},
+	{0x10A05, 0x10A06}, {0x10A0C, 0x10A13}, {0x10A15, 0x10A17},
+	{0x10A19, 0x10A35}, {0x10A38, 0x10A3A}, {0x10A3F, 0x10A48},
+	{0x10A50, 0x10A58}, {0x10A60, 0x10A9F}, {0x10AC0, 0x10AE6},
+	{0x10AEB, 0x10AF6}, {0x10B00, 0x10B35}, {0x10B39, 0x10B55},
+	{0x10B58, 0x10B72}, {0x10B78, 0x10B91}, {0x10B99, 0x10B9C},
+	{0x10BA9, 0x10BAF}, {0x10C00, 0x10C48}, {0x10C80, 0x10CB2},
+	{0x10CC0, 0x10CF2}, {0x10CFA, 0x10D27}, {0x10D30, 0x10D39},
+	{0x10E60, 0x10E7E}, {0x10F00, 0x10F27}, {0x10F30, 0x10F59},
+	{0x10FE0, 0x10FF6}, {0x11000, 0x1104D}, {0x11052, 0x1106F},
+	{0x1107F, 0x110C1}, {0x110CD, 0x110CD}, {0x110D0, 0x110E8},
+	{0x110F0, 0x110F9}, {0x11100, 0x11134}, {0x11136, 0x11146},
+	{0x11150, 0x11176}, {0x11180, 0x111CD}, {0x111D0, 0x111DF},
+	{0x111E1, 0x111F4}, {0x11200, 0x11211}, {0x11213, 0x1123E},
+	{0x11280, 0x11286}, {0x11288, 0x11288}, {0x1128A, 0x1128D},
+	{0x1128F, 0x1129D}, {0x1129F, 0x112A9}, {0x112B0, 0x112EA},
+	{0x112F0, 0x112F9}, {0x11300, 0x11303}, {0x11305, 0x1130C},
+	{0x1130F, 0x11310}, {0x11313, 0x11328}, {0x1132A, 0x11330},
+	{0x11332, 0x11333}, {0x11335, 0x11339}, {0x1133B, 0x11344},
+	{0x11347, 0x11348}, {0x1134B, 0x1134D}, {0x11350, 0x11350},
+	{0x11357, 0x11357}, {0x1135D, 0x11363}, {0x11366, 0x1136C},
+	{0x11370, 0x11374}, {0x11400, 0x11459}, {0x1145B, 0x1145B},
+	{0x1145D, 0x1145F}, {0x11480, 0x114C7}, {0x114D0, 0x114D9},
+	{0x11580, 0x115B5}, {0x115B8, 0x115DD}, {0x11600, 0x11644},
+	{0x11650, 0x11659}, {0x11660, 0x1166C}, {0x11680, 0x116B8},
+	{0x116C0, 0x116C9}, {0x11700, 0x1171A}, {0x1171D, 0x1172B},
+	{0x11730, 0x1173F}, {0x11800, 0x1183B}, {0x118A0, 0x118F2},
+	{0x118FF, 0x118FF}, {0x119A0, 0x119A7}, {0x119AA, 0x119D7},
+	{0x119DA, 0x119E4}, {0x11A00, 0x11A47}, {0x11A50, 0x11AA2},
+	{0x11AC0, 0x11AF8}, {0x11C00, 0x11C08}, {0x11C0A, 0x11C36},
+	{0x11C38, 0x11C45}, {0x11C50, 0x11C6C}, {0x11C70, 0x11C8F},
+	{0x11C92, 0x11CA7}, {0x11CA9, 0x11CB6}, {0x11D00, 0x11D06},
+	{0x11D08, 0x11D09}, {0x11D0B, 0x11D36}, {0x11D3A, 0x11D3A},
+	{0x11D3C, 0x11D3D}, {0x11D3F, 0x11D47}, {0x11D50, 0x11D59},
+	{0x11D60, 0x11D65}, {0x11D67, 0x11D68}, {0x11D6A, 0x11D8E},
+	{0x11D90, 0x11D91}, {0x11D93, 0x11D98}, {0x11DA0, 0x11DA9},
+	{0x11EE0, 0x11EF8}, {0x11FC0, 0x11FF1}, {0x11FFF, 0x12399},
+	{0x12400, 0x1246E}, {0x12470, 0x12474}, {0x12480, 0x12543},
+	{0x13000, 0x1342E}, {0x13430, 0x13438}, {0x14400, 0x14646},
+	{0x16800, 0x16A38}, {0x16A40, 0x16A5E}, {0x16A60, 0x16A69},
+	{0x16A6E, 0x16A6F}, {0x16AD0, 0x16AED}, {0x16AF0, 0x16AF5},
+	{0x16B00, 0x16B45}, {0x16B50, 0x16B59}, {0x16B5B, 0x16B61},
+	{0x16B63, 0x16B77}, {0x16B7D, 0x16B8F}, {0x16E40, 0x16E9A},
+	{0x16F00, 0x16F4A}, {0x16F4F, 0x16F87}, {0x16F8F, 0x16F9F},
+	{0x1BC00, 0x1BC6A}, {0x1BC70, 0x1BC7C}, {0x1BC80, 0x1BC88},
+	{0x1BC90, 0x1BC99}, {0x1BC9C, 0x1BCA3}, {0x1D000, 0x1D0F5},
+	{0x1D100, 0x1D126}, {0x1D129, 0x1D1E8}, {0x1D200, 0x1D245},
+	{0x1D2E0, 0x1D2F3}, {0x1D300, 0x1D356}, {0x1D360, 0x1D378},
+	{0x1D400, 0x1D454}, {0x1D456, 0x1D49C}, {0x1D49E, 0x1D49F},
+	{0x1D4A2, 0x1D4A2}, {0x1D4A5, 0x1D4A6}, {0x1D4A9, 0x1D4AC},
+	{0x1D4AE, 0x1D4B9}, {0x1D4BB, 0x1D4BB}, {0x1D4BD, 0x1D4C3},
+	{0x1D4C5, 0x1D505}, {0x1D507, 0x1D50A}, {0x1D50D, 0x1D514},
+	{0x1D516, 0x1D51C}, {0x1D51E, 0x1D539}, {0x1D53B, 0x1D53E},
+	{0x1D540, 0x1D544}, {0x1D546, 0x1D546}, {0x1D54A, 0x1D550},
+	{0x1D552, 0x1D6A5}, {0x1D6A8, 0x1D7CB}, {0x1D7CE, 0x1DA8B},
+	{0x1DA9B, 0x1DA9F}, {0x1DAA1, 0x1DAAF}, {0x1E000, 0x1E006},
+	{0x1E008, 0x1E018}, {0x1E01B, 0x1E021}, {0x1E023, 0x1E024},
+	{0x1E026, 0x1E02A}, {0x1E100, 0x1E12C}, {0x1E130, 0x1E13D},
+	{0x1E140, 0x1E149}, {0x1E14E, 0x1E14F}, {0x1E2C0, 0x1E2F9},
+	{0x1E2FF, 0x1E2FF}, {0x1E800, 0x1E8C4}, {0x1E8C7, 0x1E8D6},
+	{0x1E900, 0x1E94B}, {0x1E950, 0x1E959}, {0x1E95E, 0x1E95F},
+	{0x1EC71, 0x1ECB4}, {0x1ED01, 0x1ED3D}, {0x1EE00, 0x1EE03},
+	{0x1EE05, 0x1EE1F}, {0x1EE21, 0x1EE22}, {0x1EE24, 0x1EE24},
+	{0x1EE27, 0x1EE27}, {0x1EE29, 0x1EE32}, {0x1EE34, 0x1EE37},
+	{0x1EE39, 0x1EE39}, {0x1EE3B, 0x1EE3B}, {0x1EE42, 0x1EE42},
+	{0x1EE47, 0x1EE47}, {0x1EE49, 0x1EE49}, {0x1EE4B, 0x1EE4B},
+	{0x1EE4D, 0x1EE4F}, {0x1EE51, 0x1EE52}, {0x1EE54, 0x1EE54},
+	{0x1EE57, 0x1EE57}, {0x1EE59, 0x1EE59}, {0x1EE5B, 0x1EE5B},
+	{0x1EE5D, 0x1EE5D}, {0x1EE5F, 0x1EE5F}, {0x1EE61, 0x1EE62},
+	{0x1EE64, 0x1EE64}, {0x1EE67, 0x1EE6A}, {0x1EE6C, 0x1EE72},
+	{0x1EE74, 0x1EE77}, {0x1EE79, 0x1EE7C}, {0x1EE7E, 0x1EE7E},
+	{0x1EE80, 0x1EE89}, {0x1EE8B, 0x1EE9B}, {0x1EEA1, 0x1EEA3},
+	{0x1EEA5, 0x1EEA9}, {0x1EEAB, 0x1EEBB}, {0x1EEF0, 0x1EEF1},
+	{0x1F000, 0x1F003}, {0x1F005, 0x1F02B}, {0x1F030, 0x1F093},
+	{0x1F0A0, 0x1F0AE}, {0x1F0B1, 0x1F0BF}, {0x1F0C1, 0x1F0CE},
+	{0x1F0D1, 0x1F0F5}, {0x1F10B, 0x1F10C}, {0x1F12E, 0x1F12F},
+	{0x1F16A, 0x1F16C}, {0x1F1E6, 0x1F1FF}, {0x1F321, 0x1F32C},
+	{0x1F336, 0x1F336}, {0x1F37D, 0x1F37D}, {0x1F394, 0x1F39F},
+	{0x1F3CB, 0x1F3CE}, {0x1F3D4, 0x1F3DF}, {0x1F3F1, 0x1F3F3},
+	{0x1F3F5, 0x1F3F7}, {0x1F43F, 0x1F43F}, {0x1F441, 0x1F441},
+	{0x1F4FD, 0x1F4FE}, {0x1F53E, 0x1F54A}, {0x1F54F, 0x1F54F},
+	{0x1F568, 0x1F579}, {0x1F57B, 0x1F594}, {0x1F597, 0x1F5A3},
+	{0x1F5A5, 0x1F5FA}, {0x1F650, 0x1F67F}, {0x1F6C6, 0x1F6CB},
+	{0x1F6CD, 0x1F6CF}, {0x1F6D3, 0x1F6D4}, {0x1F6E0, 0x1F6EA},
+	{0x1F6F0, 0x1F6F3}, {0x1F700, 0x1F773}, {0x1F780, 0x1F7D8},
+	{0x1F800, 0x1F80B}, {0x1F810, 0x1F847}, {0x1F850, 0x1F859},
+	{0x1F860, 0x1F887}, {0x1F890, 0x1F8AD}, {0x1F900, 0x1F90B},
+	{0x1FA00, 0x1FA53}, {0x1FA60, 0x1FA6D}, {0xE0001, 0xE0001},
+	{0xE0020, 0xE007F},
+}
+
+var emoji = table{
+	{0x203C, 0x203C}, {0x2049, 0x2049}, {0x2122, 0x2122},
+	{0x2139, 0x2139}, {0x2194, 0x2199}, {0x21A9, 0x21AA},
+	{0x231A, 0x231B}, {0x2328, 0x2328}, {0x2388, 0x2388},
+	{0x23CF, 0x23CF}, {0x23E9, 0x23F3}, {0x23F8, 0x23FA},
+	{0x24C2, 0x24C2}, {0x25AA, 0x25AB}, {0x25B6, 0x25B6},
+	{0x25C0, 0x25C0}, {0x25FB, 0x25FE}, {0x2600, 0x2605},
+	{0x2607, 0x2612}, {0x2614, 0x2685}, {0x2690, 0x2705},
+	{0x2708, 0x2712}, {0x2714, 0x2714}, {0x2716, 0x2716},
+	{0x271D, 0x271D}, {0x2721, 0x2721}, {0x2728, 0x2728},
+	{0x2733, 0x2734}, {0x2744, 0x2744}, {0x2747, 0x2747},
+	{0x274C, 0x274C}, {0x274E, 0x274E}, {0x2753, 0x2755},
+	{0x2757, 0x2757}, {0x2763, 0x2767}, {0x2795, 0x2797},
+	{0x27A1, 0x27A1}, {0x27B0, 0x27B0}, {0x27BF, 0x27BF},
+	{0x2934, 0x2935}, {0x2B05, 0x2B07}, {0x2B1B, 0x2B1C},
+	{0x2B50, 0x2B50}, {0x2B55, 0x2B55}, {0x3030, 0x3030},
+	{0x303D, 0x303D}, {0x3297, 0x3297}, {0x3299, 0x3299},
+	{0x1F000, 0x1F0FF}, {0x1F10D, 0x1F10F}, {0x1F12F, 0x1F12F},
+	{0x1F16C, 0x1F171}, {0x1F17E, 0x1F17F}, {0x1F18E, 0x1F18E},
+	{0x1F191, 0x1F19A}, {0x1F1AD, 0x1F1E5}, {0x1F201, 0x1F20F},
+	{0x1F21A, 0x1F21A}, {0x1F22F, 0x1F22F}, {0x1F232, 0x1F23A},
+	{0x1F23C, 0x1F23F}, {0x1F249, 0x1F3FA}, {0x1F400, 0x1F53D},
+	{0x1F546, 0x1F64F}, {0x1F680, 0x1F6FF}, {0x1F774, 0x1F77F},
+	{0x1F7D5, 0x1F7FF}, {0x1F80C, 0x1F80F}, {0x1F848, 0x1F84F},
+	{0x1F85A, 0x1F85F}, {0x1F888, 0x1F88F}, {0x1F8AE, 0x1F8FF},
+	{0x1F90C, 0x1F93A}, {0x1F93C, 0x1F945}, {0x1F947, 0x1FFFD},
+}
--- a/vendor/github.com/mattn/go-runewidth/runewidth_windows.go
+++ b/vendor/github.com/mattn/go-runewidth/runewidth_windows.go
@ -0,0 +1,28 @@
+// +build windows
+// +build !appengine
+
+package runewidth
+
+import (
+	"syscall"
+)
+
+var (
+	kernel32               = syscall.NewLazyDLL("kernel32")
+	procGetConsoleOutputCP = kernel32.NewProc("GetConsoleOutputCP")
+)
+
+// IsEastAsian return true if the current locale is CJK
+func IsEastAsian() bool {
+	r1, _, _ := procGetConsoleOutputCP.Call()
+	if r1 == 0 {
+		return false
+	}
+
+	switch int(r1) {
+	case 932, 51932, 936, 949, 950:
+		return true
+	}
+
+	return false
+}
--- a/vendor/github.com/mgechev/dots/.travis.yml
+++ b/vendor/github.com/mgechev/dots/.travis.yml
@ -0,0 +1,2 @@
+language: go
+go: master
--- a/vendor/github.com/mgechev/dots/LICENSE
+++ b/vendor/github.com/mgechev/dots/LICENSE
@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Minko Gechev
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/vendor/github.com/mgechev/dots/README.md
+++ b/vendor/github.com/mgechev/dots/README.md
@ -0,0 +1,100 @@
+[![Build Status](https://travis-ci.org/mgechev/dots.svg?branch=master)](https://travis-ci.org/mgechev/dots)
+
+# Dots
+
+Implements the wildcard file matching in Go used by golint, go test etc.
+
+## Usage
+
+```go
+import "github.com/mgechev/dots"
+
+func main() {
+  result, err := dots.Resolve([]string{"./fixtures/..."}, []string{"./fixtures/foo"})
+  for _, f := range result {
+    fmt.Println(f);
+  }
+}
+```
+
+If we suppose that we have the following directory structure:
+
+```text
+├── README.md
+├── fixtures
+│   ├── bar
+│   │   ├── bar1.go
+│   │   └── bar2.go
+│   ├── baz
+│   │   ├── baz1.go
+│   │   ├── baz2.go
+│   │   └── baz3.go
+│   └── foo
+│       ├── foo1.go
+│       ├── foo2.go
+│       └── foo3.go
+└── main.go
+```
+
+The result will be:
+
+```text
+fixtures/bar/bar1.go
+fixtures/bar/bar2.go
+fixtures/baz/baz1.go
+fixtures/baz/baz2.go
+fixtures/baz/baz3.go
+```
+
+`dots` supports wildcard in both - the first and the last argument of `Resolve`, which means that you can ignore files based on a wildcard:
+
+```go
+dots.Resolve([]string{"github.com/mgechev/dots"}, []string{"./..."}) // empty list
+dots.Resolve([]string{"./fixtures/bar/..."}, []string{"./fixture/foo/...", "./fixtures/baz/..."}) // bar1.go, bar2.go
+```
+
+## Preserve package structure
+
+`dots` allow you to receive a slice of slices where each nested slice represents an individual package:
+
+```go
+dots.ResolvePackages([]string{"github.com/mgechev/dots/..."}, []string{})
+```
+
+So we will get the result:
+
+```text
+[
+  [
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/dummy/bar/bar1.go",
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/dummy/bar/bar2.go"
+  ],
+  [
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/dummy/baz/baz1.go",
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/dummy/baz/baz2.go",
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/dummy/baz/baz3.go"
+  ],
+  [
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/dummy/foo/foo1.go",
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/dummy/foo/foo2.go",
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/dummy/foo/foo3.go"
+  ],
+  [
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/pkg/baz/baz1.go",
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/pkg/baz/baz2.go"
+  ],
+  [
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/pkg/foo/foo1.go",
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/pkg/foo/foo2.go"
+  ],
+  [
+    "$GOROOT/src/github.com/mgechev/dots/fixtures/pkg/foo/bar/bar1.go"
+  ]
+]
+```
+
+This method is especially useful, when you want to perform type checking over given package from the result.
+
+## License
+
+MIT
--- a/vendor/github.com/mgechev/dots/resolve.go
+++ b/vendor/github.com/mgechev/dots/resolve.go
@ -0,0 +1,456 @@
+package dots
+
+import (
+	"go/build"
+	"log"
+	"os"
+	"path"
+	"path/filepath"
+	"regexp"
+	"runtime"
+	"strings"
+)
+
+var (
+	buildContext = build.Default
+	goroot       = filepath.Clean(runtime.GOROOT())
+	gorootSrc    = filepath.Join(goroot, "src")
+)
+
+func flatten(arr [][]string) []string {
+	var res []string
+	for _, e := range arr {
+		res = append(res, e...)
+	}
+	return res
+}
+
+// Resolve accepts a slice of paths with optional "..." placeholder and a slice with paths to be skipped.
+// The final result is the set of all files from the selected directories subtracted with
+// the files in the skip slice.
+func Resolve(includePatterns, skipPatterns []string) ([]string, error) {
+	skip, err := resolvePatterns(skipPatterns)
+	filter := newPathFilter(flatten(skip))
+	if err != nil {
+		return nil, err
+	}
+
+	pathSet := map[string]bool{}
+	includePackages, err := resolvePatterns(includePatterns)
+	include := flatten(includePackages)
+	if err != nil {
+		return nil, err
+	}
+
+	var result []string
+	for _, i := range include {
+		if _, ok := pathSet[i]; !ok && !filter(i) {
+			pathSet[i] = true
+			result = append(result, i)
+		}
+	}
+	return result, err
+}
+
+// ResolvePackages accepts a slice of paths with optional "..." placeholder and a slice with paths to be skipped.
+// The final result is the set of all files from the selected directories subtracted with
+// the files in the skip slice. The difference between `Resolve` and `ResolvePackages`
+// is that `ResolvePackages` preserves the package structure in the nested slices.
+func ResolvePackages(includePatterns, skipPatterns []string) ([][]string, error) {
+	skip, err := resolvePatterns(skipPatterns)
+	filter := newPathFilter(flatten(skip))
+	if err != nil {
+		return nil, err
+	}
+
+	pathSet := map[string]bool{}
+	include, err := resolvePatterns(includePatterns)
+	if err != nil {
+		return nil, err
+	}
+
+	var result [][]string
+	for _, p := range include {
+		var packageFiles []string
+		for _, f := range p {
+			if _, ok := pathSet[f]; !ok && !filter(f) {
+				pathSet[f] = true
+				packageFiles = append(packageFiles, f)
+			}
+		}
+		result = append(result, packageFiles)
+	}
+	return result, err
+}
+
+func isDir(filename string) bool {
+	fi, err := os.Stat(filename)
+	return err == nil && fi.IsDir()
+}
+
+func exists(filename string) bool {
+	_, err := os.Stat(filename)
+	return err == nil
+}
+
+func resolveDir(dirname string) ([]string, error) {
+	pkg, err := build.ImportDir(dirname, 0)
+	return resolveImportedPackage(pkg, err)
+}
+
+func resolvePackage(pkgname string) ([]string, error) {
+	pkg, err := build.Import(pkgname, ".", 0)
+	return resolveImportedPackage(pkg, err)
+}
+
+func resolveImportedPackage(pkg *build.Package, err error) ([]string, error) {
+	if err != nil {
+		if _, nogo := err.(*build.NoGoError); nogo {
+			// Don't complain if the failure is due to no Go source files.
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	var files []string
+	files = append(files, pkg.GoFiles...)
+	files = append(files, pkg.CgoFiles...)
+	files = append(files, pkg.TestGoFiles...)
+	if pkg.Dir != "." {
+		for i, f := range files {
+			files[i] = filepath.Join(pkg.Dir, f)
+		}
+	}
+	return files, nil
+}
+
+func resolvePatterns(patterns []string) ([][]string, error) {
+	var files [][]string
+	for _, pattern := range patterns {
+		f, err := resolvePattern(pattern)
+		if err != nil {
+			return nil, err
+		}
+		files = append(files, f...)
+	}
+	return files, nil
+}
+
+func resolvePattern(pattern string) ([][]string, error) {
+	// dirsRun, filesRun, and pkgsRun indicate whether golint is applied to
+	// directory, file or package targets. The distinction affects which
+	// checks are run. It is no valid to mix target types.
+	var dirsRun, filesRun, pkgsRun int
+	var matches []string
+
+	if strings.HasSuffix(pattern, "/...") && isDir(pattern[:len(pattern)-len("/...")]) {
+		dirsRun = 1
+		for _, dirname := range matchPackagesInFS(pattern) {
+			matches = append(matches, dirname)
+		}
+	} else if isDir(pattern) {
+		dirsRun = 1
+		matches = append(matches, pattern)
+	} else if exists(pattern) {
+		filesRun = 1
+		matches = append(matches, pattern)
+	} else {
+		pkgsRun = 1
+		matches = append(matches, pattern)
+	}
+
+	result := [][]string{}
+	switch {
+	case dirsRun == 1:
+		for _, dir := range matches {
+			res, err := resolveDir(dir)
+			if err != nil {
+				return nil, err
+			}
+			result = append(result, res)
+		}
+	case filesRun == 1:
+		return [][]string{matches}, nil
+	case pkgsRun == 1:
+		for _, pkg := range importPaths(matches) {
+			res, err := resolvePackage(pkg)
+			if err != nil {
+				return nil, err
+			}
+			result = append(result, res)
+		}
+	}
+	return result, nil
+}
+
+func newPathFilter(skip []string) func(string) bool {
+	filter := map[string]bool{}
+	for _, name := range skip {
+		filter[name] = true
+	}
+
+	return func(path string) bool {
+		base := filepath.Base(path)
+		if filter[base] || filter[path] {
+			return true
+		}
+		return base != "." && base != ".." && strings.ContainsAny(base[0:1], "_.")
+	}
+}
+
+// importPathsNoDotExpansion returns the import paths to use for the given
+// command line, but it does no ... expansion.
+func importPathsNoDotExpansion(args []string) []string {
+	if len(args) == 0 {
+		return []string{"."}
+	}
+	var out []string
+	for _, a := range args {
+		// Arguments are supposed to be import paths, but
+		// as a courtesy to Windows developers, rewrite \ to /
+		// in command-line arguments.  Handles .\... and so on.
+		if filepath.Separator == '\\' {
+			a = strings.Replace(a, `\`, `/`, -1)
+		}
+
+		// Put argument in canonical form, but preserve leading ./.
+		if strings.HasPrefix(a, "./") {
+			a = "./" + path.Clean(a)
+			if a == "./." {
+				a = "."
+			}
+		} else {
+			a = path.Clean(a)
+		}
+		if a == "all" || a == "std" {
+			out = append(out, matchPackages(a)...)
+			continue
+		}
+		out = append(out, a)
+	}
+	return out
+}
+
+// importPaths returns the import paths to use for the given command line.
+func importPaths(args []string) []string {
+	args = importPathsNoDotExpansion(args)
+	var out []string
+	for _, a := range args {
+		if strings.Contains(a, "...") {
+			if build.IsLocalImport(a) {
+				out = append(out, matchPackagesInFS(a)...)
+			} else {
+				out = append(out, matchPackages(a)...)
+			}
+			continue
+		}
+		out = append(out, a)
+	}
+	return out
+}
+
+// matchPattern(pattern)(name) reports whether
+// name matches pattern.  Pattern is a limited glob
+// pattern in which '...' means 'any string' and there
+// is no other special syntax.
+func matchPattern(pattern string) func(name string) bool {
+	re := regexp.QuoteMeta(pattern)
+	re = strings.Replace(re, `\.\.\.`, `.*`, -1)
+	// Special case: foo/... matches foo too.
+	if strings.HasSuffix(re, `/.*`) {
+		re = re[:len(re)-len(`/.*`)] + `(/.*)?`
+	}
+	reg := regexp.MustCompile(`^` + re + `$`)
+	return func(name string) bool {
+		return reg.MatchString(name)
+	}
+}
+
+// hasPathPrefix reports whether the path s begins with the
+// elements in prefix.
+func hasPathPrefix(s, prefix string) bool {
+	switch {
+	default:
+		return false
+	case len(s) == len(prefix):
+		return s == prefix
+	case len(s) > len(prefix):
+		if prefix != "" && prefix[len(prefix)-1] == '/' {
+			return strings.HasPrefix(s, prefix)
+		}
+		return s[len(prefix)] == '/' && s[:len(prefix)] == prefix
+	}
+}
+
+// treeCanMatchPattern(pattern)(name) reports whether
+// name or children of name can possibly match pattern.
+// Pattern is the same limited glob accepted by matchPattern.
+func treeCanMatchPattern(pattern string) func(name string) bool {
+	wildCard := false
+	if i := strings.Index(pattern, "..."); i >= 0 {
+		wildCard = true
+		pattern = pattern[:i]
+	}
+	return func(name string) bool {
+		return len(name) <= len(pattern) && hasPathPrefix(pattern, name) ||
+			wildCard && strings.HasPrefix(name, pattern)
+	}
+}
+
+func matchPackages(pattern string) []string {
+	match := func(string) bool { return true }
+	treeCanMatch := func(string) bool { return true }
+	if pattern != "all" && pattern != "std" {
+		match = matchPattern(pattern)
+		treeCanMatch = treeCanMatchPattern(pattern)
+	}
+
+	have := map[string]bool{
+		"builtin": true, // ignore pseudo-package that exists only for documentation
+	}
+	if !buildContext.CgoEnabled {
+		have["runtime/cgo"] = true // ignore during walk
+	}
+	var pkgs []string
+
+	// Commands
+	cmd := filepath.Join(goroot, "src/cmd") + string(filepath.Separator)
+	filepath.Walk(cmd, func(path string, fi os.FileInfo, err error) error {
+		if err != nil || !fi.IsDir() || path == cmd {
+			return nil
+		}
+		name := path[len(cmd):]
+		if !treeCanMatch(name) {
+			return filepath.SkipDir
+		}
+		// Commands are all in cmd/, not in subdirectories.
+		if strings.Contains(name, string(filepath.Separator)) {
+			return filepath.SkipDir
+		}
+
+		// We use, e.g., cmd/gofmt as the pseudo import path for gofmt.
+		name = "cmd/" + name
+		if have[name] {
+			return nil
+		}
+		have[name] = true
+		if !match(name) {
+			return nil
+		}
+		_, err = buildContext.ImportDir(path, 0)
+		if err != nil {
+			if _, noGo := err.(*build.NoGoError); !noGo {
+				log.Print(err)
+			}
+			return nil
+		}
+		pkgs = append(pkgs, name)
+		return nil
+	})
+
+	for _, src := range buildContext.SrcDirs() {
+		if (pattern == "std" || pattern == "cmd") && src != gorootSrc {
+			continue
+		}
+		src = filepath.Clean(src) + string(filepath.Separator)
+		root := src
+		if pattern == "cmd" {
+			root += "cmd" + string(filepath.Separator)
+		}
+		filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
+			if err != nil || !fi.IsDir() || path == src {
+				return nil
+			}
+
+			// Avoid .foo, _foo, and testdata directory trees.
+			_, elem := filepath.Split(path)
+			if strings.HasPrefix(elem, ".") || strings.HasPrefix(elem, "_") || elem == "testdata" {
+				return filepath.SkipDir
+			}
+
+			name := filepath.ToSlash(path[len(src):])
+			if pattern == "std" && (strings.Contains(name, ".") || name == "cmd") {
+				// The name "std" is only the standard library.
+				// If the name is cmd, it's the root of the command tree.
+				return filepath.SkipDir
+			}
+			if !treeCanMatch(name) {
+				return filepath.SkipDir
+			}
+			if have[name] {
+				return nil
+			}
+			have[name] = true
+			if !match(name) {
+				return nil
+			}
+			_, err = buildContext.ImportDir(path, 0)
+			if err != nil {
+				if _, noGo := err.(*build.NoGoError); noGo {
+					return nil
+				}
+			}
+			pkgs = append(pkgs, name)
+			return nil
+		})
+	}
+	return pkgs
+}
+
+func matchPackagesInFS(pattern string) []string {
+	// Find directory to begin the scan.
+	// Could be smarter but this one optimization
+	// is enough for now, since ... is usually at the
+	// end of a path.
+	i := strings.Index(pattern, "...")
+	dir, _ := path.Split(pattern[:i])
+
+	// pattern begins with ./ or ../.
+	// path.Clean will discard the ./ but not the ../.
+	// We need to preserve the ./ for pattern matching
+	// and in the returned import paths.
+	prefix := ""
+	if strings.HasPrefix(pattern, "./") {
+		prefix = "./"
+	}
+	match := matchPattern(pattern)
+
+	var pkgs []string
+	filepath.Walk(dir, func(path string, fi os.FileInfo, err error) error {
+		if err != nil || !fi.IsDir() {
+			return nil
+		}
+		if path == dir {
+			// filepath.Walk starts at dir and recurses. For the recursive case,
+			// the path is the result of filepath.Join, which calls filepath.Clean.
+			// The initial case is not Cleaned, though, so we do this explicitly.
+			//
+			// This converts a path like "./io/" to "io". Without this step, running
+			// "cd $GOROOT/src/pkg; go list ./io/..." would incorrectly skip the io
+			// package, because prepending the prefix "./" to the unclean path would
+			// result in "././io", and match("././io") returns false.
+			path = filepath.Clean(path)
+		}
+
+		// Avoid .foo, _foo, and testdata directory trees, but do not avoid "." or "..".
+		_, elem := filepath.Split(path)
+		dot := strings.HasPrefix(elem, ".") && elem != "." && elem != ".."
+		if dot || strings.HasPrefix(elem, "_") || elem == "testdata" {
+			return filepath.SkipDir
+		}
+
+		name := prefix + filepath.ToSlash(path)
+		if !match(name) {
+			return nil
+		}
+		if _, err = build.ImportDir(path, 0); err != nil {
+			if _, noGo := err.(*build.NoGoError); !noGo {
+				log.Print(err)
+			}
+			return nil
+		}
+		pkgs = append(pkgs, name)
+		return nil
+	})
+	return pkgs
+}
--- a/vendor/github.com/mgechev/revive/LICENSE
+++ b/vendor/github.com/mgechev/revive/LICENSE
@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Minko Gechev
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/vendor/github.com/mgechev/revive/formatter/checkstyle.go
+++ b/vendor/github.com/mgechev/revive/formatter/checkstyle.go
@ -0,0 +1,76 @@
+package formatter
+
+import (
+	"bytes"
+	"encoding/xml"
+	"github.com/mgechev/revive/lint"
+	plainTemplate "text/template"
+)
+
+// Checkstyle is an implementation of the Formatter interface
+// which formats the errors to Checkstyle-like format.
+type Checkstyle struct {
+	Metadata lint.FormatterMetadata
+}
+
+// Name returns the name of the formatter
+func (f *Checkstyle) Name() string {
+	return "checkstyle"
+}
+
+type issue struct {
+	Line       int
+	Col        int
+	What       string
+	Confidence float64
+	Severity   lint.Severity
+	RuleName   string
+}
+
+// Format formats the failures gotten from the lint.
+func (f *Checkstyle) Format(failures <-chan lint.Failure, config lint.Config) (string, error) {
+	var issues = map[string][]issue{}
+	for failure := range failures {
+		buf := new(bytes.Buffer)
+		xml.Escape(buf, []byte(failure.Failure))
+		what := buf.String()
+		iss := issue{
+			Line:       failure.Position.Start.Line,
+			Col:        failure.Position.Start.Column,
+			What:       what,
+			Confidence: failure.Confidence,
+			Severity:   severity(config, failure),
+			RuleName:   failure.RuleName,
+		}
+		fn := failure.GetFilename()
+		if issues[fn] == nil {
+			issues[fn] = make([]issue, 0)
+		}
+		issues[fn] = append(issues[fn], iss)
+	}
+
+	t, err := plainTemplate.New("revive").Parse(checkstyleTemplate)
+	if err != nil {
+		return "", err
+	}
+
+	buf := new(bytes.Buffer)
+
+	err = t.Execute(buf, issues)
+	if err != nil {
+		return "", err
+	}
+
+	return buf.String(), nil
+}
+
+const checkstyleTemplate = `<?xml version='1.0' encoding='UTF-8'?>
+<checkstyle version="5.0">
+{{- range $k, $v := . }}
+    <file name="{{ $k }}">
+      {{- range $i, $issue := $v }}
+      <error line="{{ $issue.Line }}" column="{{ $issue.Col }}" message="{{ $issue.What }} (confidence {{ $issue.Confidence}})" severity="{{ $issue.Severity }}" source="revive/{{ $issue.RuleName }}"/>
+      {{- end }}
+    </file>
+{{- end }}
+</checkstyle>`
--- a/vendor/github.com/mgechev/revive/formatter/default.go
+++ b/vendor/github.com/mgechev/revive/formatter/default.go
@ -0,0 +1,26 @@
+package formatter
+
+import (
+	"fmt"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// Default is an implementation of the Formatter interface
+// which formats the errors to text.
+type Default struct {
+	Metadata lint.FormatterMetadata
+}
+
+// Name returns the name of the formatter
+func (f *Default) Name() string {
+	return "default"
+}
+
+// Format formats the failures gotten from the lint.
+func (f *Default) Format(failures <-chan lint.Failure, _ lint.Config) (string, error) {
+	for failure := range failures {
+		fmt.Printf("%v: %s\n", failure.Position.Start, failure.Failure)
+	}
+	return "", nil
+}
--- a/vendor/github.com/mgechev/revive/formatter/friendly.go
+++ b/vendor/github.com/mgechev/revive/formatter/friendly.go
@ -0,0 +1,146 @@
+package formatter
+
+import (
+	"bytes"
+	"fmt"
+	"sort"
+
+	"github.com/fatih/color"
+	"github.com/mgechev/revive/lint"
+	"github.com/olekukonko/tablewriter"
+)
+
+var (
+	errorEmoji   = color.RedString("✘")
+	warningEmoji = color.YellowString("⚠")
+)
+
+var newLines = map[rune]bool{
+	0x000A: true,
+	0x000B: true,
+	0x000C: true,
+	0x000D: true,
+	0x0085: true,
+	0x2028: true,
+	0x2029: true,
+}
+
+// Friendly is an implementation of the Formatter interface
+// which formats the errors to JSON.
+type Friendly struct {
+	Metadata lint.FormatterMetadata
+}
+
+// Name returns the name of the formatter
+func (f *Friendly) Name() string {
+	return "friendly"
+}
+
+// Format formats the failures gotten from the lint.
+func (f *Friendly) Format(failures <-chan lint.Failure, config lint.Config) (string, error) {
+	errorMap := map[string]int{}
+	warningMap := map[string]int{}
+	totalErrors := 0
+	totalWarnings := 0
+	for failure := range failures {
+		sev := severity(config, failure)
+		f.printFriendlyFailure(failure, sev)
+		if sev == lint.SeverityWarning {
+			warningMap[failure.RuleName] = warningMap[failure.RuleName] + 1
+			totalWarnings++
+		}
+		if sev == lint.SeverityError {
+			errorMap[failure.RuleName] = errorMap[failure.RuleName] + 1
+			totalErrors++
+		}
+	}
+	f.printSummary(totalErrors, totalWarnings)
+	f.printStatistics(color.RedString("Errors:"), errorMap)
+	f.printStatistics(color.YellowString("Warnings:"), warningMap)
+	return "", nil
+}
+
+func (f *Friendly) printFriendlyFailure(failure lint.Failure, severity lint.Severity) {
+	f.printHeaderRow(failure, severity)
+	f.printFilePosition(failure)
+	fmt.Println()
+	fmt.Println()
+}
+
+func (f *Friendly) printHeaderRow(failure lint.Failure, severity lint.Severity) {
+	emoji := warningEmoji
+	if severity == lint.SeverityError {
+		emoji = errorEmoji
+	}
+	fmt.Print(f.table([][]string{{emoji, "https://revive.run/r#" + failure.RuleName, color.GreenString(failure.Failure)}}))
+}
+
+func (f *Friendly) printFilePosition(failure lint.Failure) {
+	fmt.Printf("  %s:%d:%d", failure.GetFilename(), failure.Position.Start.Line, failure.Position.Start.Column)
+}
+
+type statEntry struct {
+	name     string
+	failures int
+}
+
+func (f *Friendly) printSummary(errors, warnings int) {
+	emoji := warningEmoji
+	if errors > 0 {
+		emoji = errorEmoji
+	}
+	problemsLabel := "problems"
+	if errors+warnings == 1 {
+		problemsLabel = "problem"
+	}
+	warningsLabel := "warnings"
+	if warnings == 1 {
+		warningsLabel = "warning"
+	}
+	errorsLabel := "errors"
+	if errors == 1 {
+		errorsLabel = "error"
+	}
+	str := fmt.Sprintf("%d %s (%d %s, %d %s)", errors+warnings, problemsLabel, errors, errorsLabel, warnings, warningsLabel)
+	if errors > 0 {
+		fmt.Printf("%s %s\n", emoji, color.RedString(str))
+		fmt.Println()
+		return
+	}
+	if warnings > 0 {
+		fmt.Printf("%s %s\n", emoji, color.YellowString(str))
+		fmt.Println()
+		return
+	}
+}
+
+func (f *Friendly) printStatistics(header string, stats map[string]int) {
+	if len(stats) == 0 {
+		return
+	}
+	var data []statEntry
+	for name, total := range stats {
+		data = append(data, statEntry{name, total})
+	}
+	sort.Slice(data, func(i, j int) bool {
+		return data[i].failures > data[j].failures
+	})
+	formatted := [][]string{}
+	for _, entry := range data {
+		formatted = append(formatted, []string{color.GreenString(fmt.Sprintf("%d", entry.failures)), entry.name})
+	}
+	fmt.Println(header)
+	fmt.Println(f.table(formatted))
+}
+
+func (f *Friendly) table(rows [][]string) string {
+	buf := new(bytes.Buffer)
+	table := tablewriter.NewWriter(buf)
+	table.SetBorder(false)
+	table.SetColumnSeparator("")
+	table.SetRowSeparator("")
+	table.SetAutoWrapText(false)
+	table.AppendBulk(rows)
+	table.Render()
+	return buf.String()
+}
--- a/vendor/github.com/mgechev/revive/formatter/json.go
+++ b/vendor/github.com/mgechev/revive/formatter/json.go
@ -0,0 +1,40 @@
+package formatter
+
+import (
+	"encoding/json"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// JSON is an implementation of the Formatter interface
+// which formats the errors to JSON.
+type JSON struct {
+	Metadata lint.FormatterMetadata
+}
+
+// Name returns the name of the formatter
+func (f *JSON) Name() string {
+	return "json"
+}
+
+// jsonObject defines a JSON object of an failure
+type jsonObject struct {
+	Severity     lint.Severity
+	lint.Failure `json:",inline"`
+}
+
+// Format formats the failures gotten from the lint.
+func (f *JSON) Format(failures <-chan lint.Failure, config lint.Config) (string, error) {
+	var slice []jsonObject
+	for failure := range failures {
+		obj := jsonObject{}
+		obj.Severity = severity(config, failure)
+		obj.Failure = failure
+		slice = append(slice, obj)
+	}
+	result, err := json.Marshal(slice)
+	if err != nil {
+		return "", err
+	}
+	return string(result), err
+}
--- a/vendor/github.com/mgechev/revive/formatter/ndjson.go
+++ b/vendor/github.com/mgechev/revive/formatter/ndjson.go
@ -0,0 +1,34 @@
+package formatter
+
+import (
+	"encoding/json"
+	"os"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// NDJSON is an implementation of the Formatter interface
+// which formats the errors to NDJSON stream.
+type NDJSON struct {
+	Metadata lint.FormatterMetadata
+}
+
+// Name returns the name of the formatter
+func (f *NDJSON) Name() string {
+	return "ndjson"
+}
+
+// Format formats the failures gotten from the lint.
+func (f *NDJSON) Format(failures <-chan lint.Failure, config lint.Config) (string, error) {
+	enc := json.NewEncoder(os.Stdout)
+	for failure := range failures {
+		obj := jsonObject{}
+		obj.Severity = severity(config, failure)
+		obj.Failure = failure
+		err := enc.Encode(obj)
+		if err != nil {
+			return "", err
+		}
+	}
+	return "", nil
+}
--- a/vendor/github.com/mgechev/revive/formatter/plain.go
+++ b/vendor/github.com/mgechev/revive/formatter/plain.go
@ -0,0 +1,26 @@
+package formatter
+
+import (
+	"fmt"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// Plain is an implementation of the Formatter interface
+// which formats the errors to JSON.
+type Plain struct {
+	Metadata lint.FormatterMetadata
+}
+
+// Name returns the name of the formatter
+func (f *Plain) Name() string {
+	return "plain"
+}
+
+// Format formats the failures gotten from the lint.
+func (f *Plain) Format(failures <-chan lint.Failure, _ lint.Config) (string, error) {
+	for failure := range failures {
+		fmt.Printf("%v: %s %s\n", failure.Position.Start, failure.Failure, "https://revive.run/r#"+failure.RuleName)
+	}
+	return "", nil
+}
--- a/vendor/github.com/mgechev/revive/formatter/severity.go
+++ b/vendor/github.com/mgechev/revive/formatter/severity.go
@ -0,0 +1,13 @@
+package formatter
+
+import "github.com/mgechev/revive/lint"
+
+func severity(config lint.Config, failure lint.Failure) lint.Severity {
+	if config, ok := config.Rules[failure.RuleName]; ok && config.Severity == lint.SeverityError {
+		return lint.SeverityError
+	}
+	if config, ok := config.Directives[failure.RuleName]; ok && config.Severity == lint.SeverityError {
+		return lint.SeverityError
+	}
+	return lint.SeverityWarning
+}
--- a/vendor/github.com/mgechev/revive/formatter/stylish.go
+++ b/vendor/github.com/mgechev/revive/formatter/stylish.go
@ -0,0 +1,89 @@
+package formatter
+
+import (
+	"bytes"
+	"fmt"
+
+	"github.com/fatih/color"
+	"github.com/mgechev/revive/lint"
+	"github.com/olekukonko/tablewriter"
+)
+
+// Stylish is an implementation of the Formatter interface
+// which formats the errors to JSON.
+type Stylish struct {
+	Metadata lint.FormatterMetadata
+}
+
+// Name returns the name of the formatter
+func (f *Stylish) Name() string {
+	return "stylish"
+}
+
+func formatFailure(failure lint.Failure, severity lint.Severity) []string {
+	fString := color.CyanString(failure.Failure)
+	fName := color.RedString("https://revive.run/r#" + failure.RuleName)
+	lineColumn := failure.Position
+	pos := fmt.Sprintf("(%d, %d)", lineColumn.Start.Line, lineColumn.Start.Column)
+	if severity == lint.SeverityWarning {
+		fName = color.YellowString("https://revive.run/r#" + failure.RuleName)
+	}
+	return []string{failure.GetFilename(), pos, fName, fString}
+}
+
+// Format formats the failures gotten from the lint.
+func (f *Stylish) Format(failures <-chan lint.Failure, config lint.Config) (string, error) {
+	var result [][]string
+	var totalErrors = 0
+	var total = 0
+
+	for f := range failures {
+		total++
+		currentType := severity(config, f)
+		if currentType == lint.SeverityError {
+			totalErrors++
+		}
+		result = append(result, formatFailure(f, lint.Severity(currentType)))
+	}
+	ps := "problems"
+	if total == 1 {
+		ps = "problem"
+	}
+
+	fileReport := make(map[string][][]string)
+
+	for _, row := range result {
+		if _, ok := fileReport[row[0]]; !ok {
+			fileReport[row[0]] = [][]string{}
+		}
+
+		fileReport[row[0]] = append(fileReport[row[0]], []string{row[1], row[2], row[3]})
+	}
+
+	output := ""
+	for filename, val := range fileReport {
+		buf := new(bytes.Buffer)
+		table := tablewriter.NewWriter(buf)
+		table.SetBorder(false)
+		table.SetColumnSeparator("")
+		table.SetRowSeparator("")
+		table.SetAutoWrapText(false)
+		table.AppendBulk(val)
+		table.Render()
+		c := color.New(color.Underline)
+		output += c.SprintfFunc()(filename + "\n")
+		output += buf.String() + "\n"
+	}
+
+	suffix := fmt.Sprintf(" %d %s (%d errors) (%d warnings)", total, ps, totalErrors, total-totalErrors)
+
+	if total > 0 && totalErrors > 0 {
+		suffix = color.RedString("\n ✖" + suffix)
+	} else if total > 0 && totalErrors == 0 {
+		suffix = color.YellowString("\n ✖" + suffix)
+	} else {
+		suffix, output = "", ""
+	}
+
+	return output + suffix, nil
+}
--- a/vendor/github.com/mgechev/revive/formatter/unix.go
+++ b/vendor/github.com/mgechev/revive/formatter/unix.go
@ -0,0 +1,27 @@
+package formatter
+
+import (
+	"fmt"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// Unix is an implementation of the Formatter interface
+// which formats the errors to a simple line based error format
+//  main.go:24:9: [errorf] should replace errors.New(fmt.Sprintf(...)) with fmt.Errorf(...)
+type Unix struct {
+	Metadata lint.FormatterMetadata
+}
+
+// Name returns the name of the formatter
+func (f *Unix) Name() string {
+	return "unix"
+}
+
+// Format formats the failures gotten from the lint.
+func (f *Unix) Format(failures <-chan lint.Failure, _ lint.Config) (string, error) {
+	for failure := range failures {
+		fmt.Printf("%v: [%s] %s\n", failure.Position.Start, failure.RuleName, failure.Failure)
+	}
+	return "", nil
+}
--- a/vendor/github.com/mgechev/revive/lint/config.go
+++ b/vendor/github.com/mgechev/revive/lint/config.go
@ -0,0 +1,32 @@
+package lint
+
+// Arguments is type used for the arguments of a rule.
+type Arguments = []interface{}
+
+// RuleConfig is type used for the rule configuration.
+type RuleConfig struct {
+	Arguments Arguments
+	Severity  Severity
+}
+
+// RulesConfig defines the config for all rules.
+type RulesConfig = map[string]RuleConfig
+
+// DirectiveConfig is type used for the linter directive configuration.
+type DirectiveConfig struct {
+	Severity Severity
+}
+
+// DirectivesConfig defines the config for all directives.
+type DirectivesConfig = map[string]DirectiveConfig
+
+// Config defines the config of the linter.
+type Config struct {
+	IgnoreGeneratedHeader bool `toml:"ignoreGeneratedHeader"`
+	Confidence            float64
+	Severity              Severity
+	Rules                 RulesConfig      `toml:"rule"`
+	ErrorCode             int              `toml:"errorCode"`
+	WarningCode           int              `toml:"warningCode"`
+	Directives            DirectivesConfig `toml:"directive"`
+}
--- a/vendor/github.com/mgechev/revive/lint/failure.go
+++ b/vendor/github.com/mgechev/revive/lint/failure.go
@ -0,0 +1,39 @@
+package lint
+
+import (
+	"go/ast"
+	"go/token"
+)
+
+const (
+	// SeverityWarning declares failures of type warning
+	SeverityWarning = "warning"
+	// SeverityError declares failures of type error.
+	SeverityError = "error"
+)
+
+// Severity is the type for the failure types.
+type Severity string
+
+// FailurePosition returns the failure position
+type FailurePosition struct {
+	Start token.Position
+	End   token.Position
+}
+
+// Failure defines a struct for a linting failure.
+type Failure struct {
+	Failure    string
+	RuleName   string
+	Category   string
+	Position   FailurePosition
+	Node       ast.Node `json:"-"`
+	Confidence float64
+	// For future use
+	ReplacementLine string
+}
+
+// GetFilename returns the filename.
+func (f *Failure) GetFilename() string {
+	return f.Position.Start.Filename
+}
--- a/vendor/github.com/mgechev/revive/lint/file.go
+++ b/vendor/github.com/mgechev/revive/lint/file.go
@ -0,0 +1,278 @@
+package lint
+
+import (
+	"bytes"
+	"go/ast"
+	"go/parser"
+	"go/printer"
+	"go/token"
+	"go/types"
+	"math"
+	"regexp"
+	"strings"
+)
+
+// File abstraction used for representing files.
+type File struct {
+	Name    string
+	Pkg     *Package
+	content []byte
+	AST     *ast.File
+}
+
+// IsTest returns if the file contains tests.
+func (f *File) IsTest() bool { return strings.HasSuffix(f.Name, "_test.go") }
+
+// Content returns the file's content.
+func (f *File) Content() []byte {
+	return f.content
+}
+
+// NewFile creates a new file
+func NewFile(name string, content []byte, pkg *Package) (*File, error) {
+	f, err := parser.ParseFile(pkg.fset, name, content, parser.ParseComments)
+	if err != nil {
+		return nil, err
+	}
+	return &File{
+		Name:    name,
+		content: content,
+		Pkg:     pkg,
+		AST:     f,
+	}, nil
+}
+
+// ToPosition returns line and column for given position.
+func (f *File) ToPosition(pos token.Pos) token.Position {
+	return f.Pkg.fset.Position(pos)
+}
+
+// Render renters a node.
+func (f *File) Render(x interface{}) string {
+	var buf bytes.Buffer
+	if err := printer.Fprint(&buf, f.Pkg.fset, x); err != nil {
+		panic(err)
+	}
+	return buf.String()
+}
+
+// CommentMap builds a comment map for the file.
+func (f *File) CommentMap() ast.CommentMap {
+	return ast.NewCommentMap(f.Pkg.fset, f.AST, f.AST.Comments)
+}
+
+var basicTypeKinds = map[types.BasicKind]string{
+	types.UntypedBool:    "bool",
+	types.UntypedInt:     "int",
+	types.UntypedRune:    "rune",
+	types.UntypedFloat:   "float64",
+	types.UntypedComplex: "complex128",
+	types.UntypedString:  "string",
+}
+
+// IsUntypedConst reports whether expr is an untyped constant,
+// and indicates what its default type is.
+// scope may be nil.
+func (f *File) IsUntypedConst(expr ast.Expr) (defType string, ok bool) {
+	// Re-evaluate expr outside of its context to see if it's untyped.
+	// (An expr evaluated within, for example, an assignment context will get the type of the LHS.)
+	exprStr := f.Render(expr)
+	tv, err := types.Eval(f.Pkg.fset, f.Pkg.TypesPkg, expr.Pos(), exprStr)
+	if err != nil {
+		return "", false
+	}
+	if b, ok := tv.Type.(*types.Basic); ok {
+		if dt, ok := basicTypeKinds[b.Kind()]; ok {
+			return dt, true
+		}
+	}
+
+	return "", false
+}
+
+func (f *File) isMain() bool {
+	if f.AST.Name.Name == "main" {
+		return true
+	}
+	return false
+}
+
+const directiveSpecifyDisableReason = "specify-disable-reason"
+
+func (f *File) lint(rules []Rule, config Config, failures chan Failure) {
+	rulesConfig := config.Rules
+	_, mustSpecifyDisableReason := config.Directives[directiveSpecifyDisableReason]
+	disabledIntervals := f.disabledIntervals(rules, mustSpecifyDisableReason, failures)
+	for _, currentRule := range rules {
+		ruleConfig := rulesConfig[currentRule.Name()]
+		currentFailures := currentRule.Apply(f, ruleConfig.Arguments)
+		for idx, failure := range currentFailures {
+			if failure.RuleName == "" {
+				failure.RuleName = currentRule.Name()
+			}
+			if failure.Node != nil {
+				failure.Position = ToFailurePosition(failure.Node.Pos(), failure.Node.End(), f)
+			}
+			currentFailures[idx] = failure
+		}
+		currentFailures = f.filterFailures(currentFailures, disabledIntervals)
+		for _, failure := range currentFailures {
+			if failure.Confidence >= config.Confidence {
+				failures <- failure
+			}
+		}
+	}
+}
+
+type enableDisableConfig struct {
+	enabled  bool
+	position int
+}
+
+const directiveRE = `^//[\s]*revive:(enable|disable)(?:-(line|next-line))?(?::([^\s]+))?[\s]*(?: (.+))?$`
+const directivePos = 1
+const modifierPos = 2
+const rulesPos = 3
+const reasonPos = 4
+
+var re = regexp.MustCompile(directiveRE)
+
+func (f *File) disabledIntervals(rules []Rule, mustSpecifyDisableReason bool, failures chan Failure) disabledIntervalsMap {
+	enabledDisabledRulesMap := make(map[string][]enableDisableConfig)
+
+	getEnabledDisabledIntervals := func() disabledIntervalsMap {
+		result := make(disabledIntervalsMap)
+
+		for ruleName, disabledArr := range enabledDisabledRulesMap {
+			ruleResult := []DisabledInterval{}
+			for i := 0; i < len(disabledArr); i++ {
+				interval := DisabledInterval{
+					RuleName: ruleName,
+					From: token.Position{
+						Filename: f.Name,
+						Line:     disabledArr[i].position,
+					},
+					To: token.Position{
+						Filename: f.Name,
+						Line:     math.MaxInt32,
+					},
+				}
+				if i%2 == 0 {
+					ruleResult = append(ruleResult, interval)
+				} else {
+					ruleResult[len(ruleResult)-1].To.Line = disabledArr[i].position
+				}
+			}
+			result[ruleName] = ruleResult
+		}
+
+		return result
+	}
+
+	handleConfig := func(isEnabled bool, line int, name string) {
+		existing, ok := enabledDisabledRulesMap[name]
+		if !ok {
+			existing = []enableDisableConfig{}
+			enabledDisabledRulesMap[name] = existing
+		}
+		if (len(existing) > 1 && existing[len(existing)-1].enabled == isEnabled) ||
+			(len(existing) == 0 && isEnabled) {
+			return
+		}
+		existing = append(existing, enableDisableConfig{
+			enabled:  isEnabled,
+			position: line,
+		})
+		enabledDisabledRulesMap[name] = existing
+	}
+
+	handleRules := func(filename, modifier string, isEnabled bool, line int, ruleNames []string) []DisabledInterval {
+		var result []DisabledInterval
+		for _, name := range ruleNames {
+			if modifier == "line" {
+				handleConfig(isEnabled, line, name)
+				handleConfig(!isEnabled, line, name)
+			} else if modifier == "next-line" {
+				handleConfig(isEnabled, line+1, name)
+				handleConfig(!isEnabled, line+1, name)
+			} else {
+				handleConfig(isEnabled, line, name)
+			}
+		}
+		return result
+	}
+
+	handleComment := func(filename string, c *ast.CommentGroup, line int) {
+		comments := c.List
+		for _, c := range comments {
+			match := re.FindStringSubmatch(c.Text)
+			if len(match) == 0 {
+				return
+			}
+
+			ruleNames := []string{}
+			tempNames := strings.Split(match[rulesPos], ",")
+			for _, name := range tempNames {
+				name = strings.Trim(name, "\n")
+				if len(name) > 0 {
+					ruleNames = append(ruleNames, name)
+				}
+			}
+
+			mustCheckDisablingReason := mustSpecifyDisableReason && match[directivePos] == "disable"
+			if mustCheckDisablingReason && strings.Trim(match[reasonPos], " ") == "" {
+				failures <- Failure{
+					Confidence: 1,
+					RuleName:   directiveSpecifyDisableReason,
+					Failure:    "reason of lint disabling not found",
+					Position:   ToFailurePosition(c.Pos(), c.End(), f),
+					Node:       c,
+				}
+				continue // skip this linter disabling directive
+			}
+
+			// TODO: optimize
+			if len(ruleNames) == 0 {
+				for _, rule := range rules {
+					ruleNames = append(ruleNames, rule.Name())
+				}
+			}
+
+			handleRules(filename, match[modifierPos], match[directivePos] == "enable", line, ruleNames)
+		}
+	}
+
+	comments := f.AST.Comments
+	for _, c := range comments {
+		handleComment(f.Name, c, f.ToPosition(c.End()).Line)
+	}
+
+	return getEnabledDisabledIntervals()
+}
+
+func (f *File) filterFailures(failures []Failure, disabledIntervals disabledIntervalsMap) []Failure {
+	result := []Failure{}
+	for _, failure := range failures {
+		fStart := failure.Position.Start.Line
+		fEnd := failure.Position.End.Line
+		intervals, ok := disabledIntervals[failure.RuleName]
+		if !ok {
+			result = append(result, failure)
+		} else {
+			include := true
+			for _, interval := range intervals {
+				intStart := interval.From.Line
+				intEnd := interval.To.Line
+				if (fStart >= intStart && fStart <= intEnd) ||
+					(fEnd >= intStart && fEnd <= intEnd) {
+					include = false
+					break
+				}
+			}
+			if include {
+				result = append(result, failure)
+			}
+		}
+	}
+	return result
+}
--- a/vendor/github.com/mgechev/revive/lint/formatter.go
+++ b/vendor/github.com/mgechev/revive/lint/formatter.go
@ -0,0 +1,14 @@
+package lint
+
+// FormatterMetadata configuration of a formatter
+type FormatterMetadata struct {
+	Name        string
+	Description string
+	Sample      string
+}
+
+// Formatter defines an interface for failure formatters
+type Formatter interface {
+	Format(<-chan Failure, Config) (string, error)
+	Name() string
+}
--- a/vendor/github.com/mgechev/revive/lint/linter.go
+++ b/vendor/github.com/mgechev/revive/lint/linter.go
@ -0,0 +1,99 @@
+package lint
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"go/token"
+	"os"
+	"sync"
+)
+
+// ReadFile defines an abstraction for reading files.
+type ReadFile func(path string) (result []byte, err error)
+
+type disabledIntervalsMap = map[string][]DisabledInterval
+
+// Linter is used for linting set of files.
+type Linter struct {
+	reader ReadFile
+}
+
+// New creates a new Linter
+func New(reader ReadFile) Linter {
+	return Linter{reader: reader}
+}
+
+var (
+	genHdr = []byte("// Code generated ")
+	genFtr = []byte(" DO NOT EDIT.")
+)
+
+// Lint lints a set of files with the specified rule.
+func (l *Linter) Lint(packages [][]string, ruleSet []Rule, config Config) (<-chan Failure, error) {
+	failures := make(chan Failure)
+
+	var wg sync.WaitGroup
+	for _, pkg := range packages {
+		wg.Add(1)
+		go func(pkg []string) {
+			if err := l.lintPackage(pkg, ruleSet, config, failures); err != nil {
+				fmt.Fprintln(os.Stderr, err)
+				os.Exit(1)
+			}
+			defer wg.Done()
+		}(pkg)
+	}
+
+	go func() {
+		wg.Wait()
+		close(failures)
+	}()
+
+	return failures, nil
+}
+
+func (l *Linter) lintPackage(filenames []string, ruleSet []Rule, config Config, failures chan Failure) error {
+	pkg := &Package{
+		fset:  token.NewFileSet(),
+		files: map[string]*File{},
+		mu:    sync.Mutex{},
+	}
+	for _, filename := range filenames {
+		content, err := l.reader(filename)
+		if err != nil {
+			return err
+		}
+		if isGenerated(content) && !config.IgnoreGeneratedHeader {
+			continue
+		}
+
+		file, err := NewFile(filename, content, pkg)
+		if err != nil {
+			return err
+		}
+		pkg.files[filename] = file
+	}
+
+	if len(pkg.files) == 0 {
+		return nil
+	}
+
+	pkg.lint(ruleSet, config, failures)
+
+	return nil
+}
+
+// isGenerated reports whether the source file is generated code
+// according the rules from https://golang.org/s/generatedcode.
+// This is inherited from the original go lint.
+func isGenerated(src []byte) bool {
+	sc := bufio.NewScanner(bytes.NewReader(src))
+	for sc.Scan() {
+		b := sc.Bytes()
+		if bytes.HasPrefix(b, genHdr) && bytes.HasSuffix(b, genFtr) && len(b) >= len(genHdr)+len(genFtr) {
+			return true
+		}
+	}
+	return false
+}
--- a/vendor/github.com/mgechev/revive/lint/package.go
+++ b/vendor/github.com/mgechev/revive/lint/package.go
@ -0,0 +1,178 @@
+package lint
+
+import (
+	"go/ast"
+	"go/token"
+	"go/types"
+	"sync"
+
+	"golang.org/x/tools/go/gcexportdata"
+)
+
+// Package represents a package in the project.
+type Package struct {
+	fset  *token.FileSet
+	files map[string]*File
+
+	TypesPkg  *types.Package
+	TypesInfo *types.Info
+
+	// sortable is the set of types in the package that implement sort.Interface.
+	Sortable map[string]bool
+	// main is whether this is a "main" package.
+	main int
+	mu   sync.Mutex
+}
+
+var newImporter = func(fset *token.FileSet) types.ImporterFrom {
+	return gcexportdata.NewImporter(fset, make(map[string]*types.Package))
+}
+
+var (
+	trueValue  = 1
+	falseValue = 2
+	notSet     = 3
+)
+
+// IsMain returns if that's the main package.
+func (p *Package) IsMain() bool {
+	if p.main == trueValue {
+		return true
+	} else if p.main == falseValue {
+		return false
+	}
+	for _, f := range p.files {
+		if f.isMain() {
+			p.main = trueValue
+			return true
+		}
+	}
+	p.main = falseValue
+	return false
+}
+
+// TypeCheck performs type checking for given package.
+func (p *Package) TypeCheck() error {
+	p.mu.Lock()
+	// If type checking has already been performed
+	// skip it.
+	if p.TypesInfo != nil || p.TypesPkg != nil {
+		p.mu.Unlock()
+		return nil
+	}
+	config := &types.Config{
+		// By setting a no-op error reporter, the type checker does as much work as possible.
+		Error:    func(error) {},
+		Importer: newImporter(p.fset),
+	}
+	info := &types.Info{
+		Types:  make(map[ast.Expr]types.TypeAndValue),
+		Defs:   make(map[*ast.Ident]types.Object),
+		Uses:   make(map[*ast.Ident]types.Object),
+		Scopes: make(map[ast.Node]*types.Scope),
+	}
+	var anyFile *File
+	var astFiles []*ast.File
+	for _, f := range p.files {
+		anyFile = f
+		astFiles = append(astFiles, f.AST)
+	}
+
+	typesPkg, err := check(config, anyFile.AST.Name.Name, p.fset, astFiles, info)
+
+	// Remember the typechecking info, even if config.Check failed,
+	// since we will get partial information.
+	p.TypesPkg = typesPkg
+	p.TypesInfo = info
+	p.mu.Unlock()
+	return err
+}
+
+// check function encapsulates the call to go/types.Config.Check method and
+// recovers if the called method panics (see issue #59)
+func check(config *types.Config, n string, fset *token.FileSet, astFiles []*ast.File, info *types.Info) (p *types.Package, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			err, _ = r.(error)
+			p = nil
+			return
+		}
+	}()
+
+	return config.Check(n, fset, astFiles, info)
+}
+
+// TypeOf returns the type of an expression.
+func (p *Package) TypeOf(expr ast.Expr) types.Type {
+	if p.TypesInfo == nil {
+		return nil
+	}
+	return p.TypesInfo.TypeOf(expr)
+}
+
+type walker struct {
+	nmap map[string]int
+	has  map[string]int
+}
+
+func (w *walker) Visit(n ast.Node) ast.Visitor {
+	fn, ok := n.(*ast.FuncDecl)
+	if !ok || fn.Recv == nil || len(fn.Recv.List) == 0 {
+		return w
+	}
+	// TODO(dsymonds): We could check the signature to be more precise.
+	recv := receiverType(fn)
+	if i, ok := w.nmap[fn.Name.Name]; ok {
+		w.has[recv] |= i
+	}
+	return w
+}
+
+func (p *Package) scanSortable() {
+	p.Sortable = make(map[string]bool)
+
+	// bitfield for which methods exist on each type.
+	const (
+		Len = 1 << iota
+		Less
+		Swap
+	)
+	nmap := map[string]int{"Len": Len, "Less": Less, "Swap": Swap}
+	has := make(map[string]int)
+	for _, f := range p.files {
+		ast.Walk(&walker{nmap, has}, f.AST)
+	}
+	for typ, ms := range has {
+		if ms == Len|Less|Swap {
+			p.Sortable[typ] = true
+		}
+	}
+}
+
+// receiverType returns the named type of the method receiver, sans "*",
+// or "invalid-type" if fn.Recv is ill formed.
+func receiverType(fn *ast.FuncDecl) string {
+	switch e := fn.Recv.List[0].Type.(type) {
+	case *ast.Ident:
+		return e.Name
+	case *ast.StarExpr:
+		if id, ok := e.X.(*ast.Ident); ok {
+			return id.Name
+		}
+	}
+	// The parser accepts much more than just the legal forms.
+	return "invalid-type"
+}
+
+func (p *Package) lint(rules []Rule, config Config, failures chan Failure) {
+	p.scanSortable()
+	var wg sync.WaitGroup
+	for _, file := range p.files {
+		wg.Add(1)
+		go (func(file *File) {
+			file.lint(rules, config, failures)
+			defer wg.Done()
+		})(file)
+	}
+	wg.Wait()
+}
--- a/vendor/github.com/mgechev/revive/lint/rule.go
+++ b/vendor/github.com/mgechev/revive/lint/rule.go
@ -0,0 +1,31 @@
+package lint
+
+import (
+	"go/token"
+)
+
+// DisabledInterval contains a single disabled interval and the associated rule name.
+type DisabledInterval struct {
+	From     token.Position
+	To       token.Position
+	RuleName string
+}
+
+// Rule defines an abstract rule interaface
+type Rule interface {
+	Name() string
+	Apply(*File, Arguments) []Failure
+}
+
+// AbstractRule defines an abstract rule.
+type AbstractRule struct {
+	Failures []Failure
+}
+
+// ToFailurePosition returns the failure position.
+func ToFailurePosition(start token.Pos, end token.Pos, file *File) FailurePosition {
+	return FailurePosition{
+		Start: file.ToPosition(start),
+		End:   file.ToPosition(end),
+	}
+}
--- a/vendor/github.com/mgechev/revive/lint/utils.go
+++ b/vendor/github.com/mgechev/revive/lint/utils.go
@ -0,0 +1,128 @@
+package lint
+
+import (
+	"strings"
+	"unicode"
+)
+
+// Name returns a different name if it should be different.
+func Name(name string, whitelist, blacklist []string) (should string) {
+	// Fast path for simple cases: "_" and all lowercase.
+	if name == "_" {
+		return name
+	}
+	allLower := true
+	for _, r := range name {
+		if !unicode.IsLower(r) {
+			allLower = false
+			break
+		}
+	}
+	if allLower {
+		return name
+	}
+
+	// Split camelCase at any lower->upper transition, and split on underscores.
+	// Check each word for common initialisms.
+	runes := []rune(name)
+	w, i := 0, 0 // index of start of word, scan
+	for i+1 <= len(runes) {
+		eow := false // whether we hit the end of a word
+		if i+1 == len(runes) {
+			eow = true
+		} else if runes[i+1] == '_' {
+			// underscore; shift the remainder forward over any run of underscores
+			eow = true
+			n := 1
+			for i+n+1 < len(runes) && runes[i+n+1] == '_' {
+				n++
+			}
+
+			// Leave at most one underscore if the underscore is between two digits
+			if i+n+1 < len(runes) && unicode.IsDigit(runes[i]) && unicode.IsDigit(runes[i+n+1]) {
+				n--
+			}
+
+			copy(runes[i+1:], runes[i+n+1:])
+			runes = runes[:len(runes)-n]
+		} else if unicode.IsLower(runes[i]) && !unicode.IsLower(runes[i+1]) {
+			// lower->non-lower
+			eow = true
+		}
+		i++
+		if !eow {
+			continue
+		}
+
+		// [w,i) is a word.
+		word := string(runes[w:i])
+		ignoreInitWarnings := map[string]bool{}
+		for _, i := range whitelist {
+			ignoreInitWarnings[i] = true
+		}
+
+		extraInits := map[string]bool{}
+		for _, i := range blacklist {
+			extraInits[i] = true
+		}
+
+		if u := strings.ToUpper(word); (commonInitialisms[u] || extraInits[u]) && !ignoreInitWarnings[u] {
+			// Keep consistent case, which is lowercase only at the start.
+			if w == 0 && unicode.IsLower(runes[w]) {
+				u = strings.ToLower(u)
+			}
+			// All the common initialisms are ASCII,
+			// so we can replace the bytes exactly.
+			copy(runes[w:], []rune(u))
+		} else if w > 0 && strings.ToLower(word) == word {
+			// already all lowercase, and not the first word, so uppercase the first character.
+			runes[w] = unicode.ToUpper(runes[w])
+		}
+		w = i
+	}
+	return string(runes)
+}
+
+// commonInitialisms is a set of common initialisms.
+// Only add entries that are highly unlikely to be non-initialisms.
+// For instance, "ID" is fine (Freudian code is rare), but "AND" is not.
+var commonInitialisms = map[string]bool{
+	"ACL":   true,
+	"API":   true,
+	"ASCII": true,
+	"CPU":   true,
+	"CSS":   true,
+	"DNS":   true,
+	"EOF":   true,
+	"GUID":  true,
+	"HTML":  true,
+	"HTTP":  true,
+	"HTTPS": true,
+	"ID":    true,
+	"IP":    true,
+	"JSON":  true,
+	"LHS":   true,
+	"QPS":   true,
+	"RAM":   true,
+	"RHS":   true,
+	"RPC":   true,
+	"SLA":   true,
+	"SMTP":  true,
+	"SQL":   true,
+	"SSH":   true,
+	"TCP":   true,
+	"TLS":   true,
+	"TTL":   true,
+	"UDP":   true,
+	"UI":    true,
+	"UID":   true,
+	"UUID":  true,
+	"URI":   true,
+	"URL":   true,
+	"UTF8":  true,
+	"VM":    true,
+	"XML":   true,
+	"XMPP":  true,
+	"XSRF":  true,
+	"XSS":   true,
+}
--- a/vendor/github.com/mgechev/revive/rule/add-constant.go
+++ b/vendor/github.com/mgechev/revive/rule/add-constant.go
@ -0,0 +1,151 @@
+package rule
+
+import (
+	"fmt"
+	"github.com/mgechev/revive/lint"
+	"go/ast"
+	"strconv"
+	"strings"
+)
+
+const (
+	defaultStrLitLimit = 2
+	kindFLOAT          = "FLOAT"
+	kindINT            = "INT"
+	kindSTRING         = "STRING"
+)
+
+type whiteList map[string]map[string]bool
+
+func newWhiteList() whiteList {
+	return map[string]map[string]bool{kindINT: map[string]bool{}, kindFLOAT: map[string]bool{}, kindSTRING: map[string]bool{}}
+}
+
+func (wl whiteList) add(kind string, list string) {
+	elems := strings.Split(list, ",")
+	for _, e := range elems {
+		wl[kind][e] = true
+	}
+}
+
+// AddConstantRule lints unused params in functions.
+type AddConstantRule struct{}
+
+// Apply applies the rule to given file.
+func (r *AddConstantRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
+	strLitLimit := defaultStrLitLimit
+	var whiteList = newWhiteList()
+	if len(arguments) > 0 {
+		args, ok := arguments[0].(map[string]interface{})
+		if !ok {
+			panic(fmt.Sprintf("Invalid argument to the add-constant rule. Expecting a k,v map, got %T", arguments[0]))
+		}
+		for k, v := range args {
+			kind := ""
+			switch k {
+			case "allowFloats":
+				kind = kindFLOAT
+				fallthrough
+			case "allowInts":
+				if kind == "" {
+					kind = kindINT
+				}
+				fallthrough
+			case "allowStrs":
+				if kind == "" {
+					kind = kindSTRING
+				}
+				list, ok := v.(string)
+				if !ok {
+					panic(fmt.Sprintf("Invalid argument to the add-constant rule, string expected. Got '%v' (%T)", v, v))
+				}
+				whiteList.add(kind, list)
+			case "maxLitCount":
+				sl, ok := v.(string)
+				if !ok {
+					panic(fmt.Sprintf("Invalid argument to the add-constant rule, expecting string representation of an integer. Got '%v' (%T)", v, v))
+				}
+
+				limit, err := strconv.Atoi(sl)
+				if err != nil {
+					panic(fmt.Sprintf("Invalid argument to the add-constant rule, expecting string representation of an integer. Got '%v'", v))
+				}
+				strLitLimit = limit
+			}
+		}
+	}
+
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	w := lintAddConstantRule{onFailure: onFailure, strLits: make(map[string]int, 0), strLitLimit: strLitLimit, whiteLst: whiteList}
+
+	ast.Walk(w, file.AST)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *AddConstantRule) Name() string {
+	return "add-constant"
+}
+
+type lintAddConstantRule struct {
+	onFailure   func(lint.Failure)
+	strLits     map[string]int
+	strLitLimit int
+	whiteLst    whiteList
+}
+
+func (w lintAddConstantRule) Visit(node ast.Node) ast.Visitor {
+	switch n := node.(type) {
+	case *ast.GenDecl:
+		return nil // skip declarations
+	case *ast.BasicLit:
+		switch kind := n.Kind.String(); kind {
+		case kindFLOAT, kindINT:
+			w.checkNumLit(kind, n)
+		case kindSTRING:
+			w.checkStrLit(n)
+		}
+	}
+
+	return w
+
+}
+
+func (w lintAddConstantRule) checkStrLit(n *ast.BasicLit) {
+	if w.whiteLst[kindSTRING][n.Value] {
+		return
+	}
+
+	count := w.strLits[n.Value]
+	if count >= 0 {
+		w.strLits[n.Value] = count + 1
+		if w.strLits[n.Value] > w.strLitLimit {
+			w.onFailure(lint.Failure{
+				Confidence: 1,
+				Node:       n,
+				Category:   "style",
+				Failure:    fmt.Sprintf("string literal %s appears, at least, %d times, create a named constant for it", n.Value, w.strLits[n.Value]),
+			})
+			w.strLits[n.Value] = -1 // mark it to avoid failing again on the same literal
+		}
+	}
+}
+
+func (w lintAddConstantRule) checkNumLit(kind string, n *ast.BasicLit) {
+	if w.whiteLst[kind][n.Value] {
+		return
+	}
+
+	w.onFailure(lint.Failure{
+		Confidence: 1,
+		Node:       n,
+		Category:   "style",
+		Failure:    fmt.Sprintf("avoid magic numbers like '%s', create a named constant for it", n.Value),
+	})
+}
--- a/vendor/github.com/mgechev/revive/rule/argument-limit.go
+++ b/vendor/github.com/mgechev/revive/rule/argument-limit.go
@ -0,0 +1,67 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ArgumentsLimitRule lints given else constructs.
+type ArgumentsLimitRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ArgumentsLimitRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
+	if len(arguments) != 1 {
+		panic(`invalid configuration for "argument-limit"`)
+	}
+
+	total, ok := arguments[0].(int64) // Alt. non panicking version
+	if !ok {
+		panic(`invalid value passed as argument number to the "argument-list" rule`)
+	}
+
+	var failures []lint.Failure
+
+	walker := lintArgsNum{
+		total: int(total),
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, file.AST)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ArgumentsLimitRule) Name() string {
+	return "argument-limit"
+}
+
+type lintArgsNum struct {
+	total     int
+	onFailure func(lint.Failure)
+}
+
+func (w lintArgsNum) Visit(n ast.Node) ast.Visitor {
+	node, ok := n.(*ast.FuncDecl)
+	if ok {
+		num := 0
+		for _, l := range node.Type.Params.List {
+			for range l.Names {
+				num++
+			}
+		}
+		if num > w.total {
+			w.onFailure(lint.Failure{
+				Confidence: 1,
+				Failure:    fmt.Sprintf("maximum number of arguments per function exceeded; max %d but got %d", w.total, num),
+				Node:       node.Type,
+			})
+			return w
+		}
+	}
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/atomic.go
+++ b/vendor/github.com/mgechev/revive/rule/atomic.go
@ -0,0 +1,94 @@
+package rule
+
+import (
+	"go/ast"
+	"go/token"
+	"go/types"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// AtomicRule lints given else constructs.
+type AtomicRule struct{}
+
+// Apply applies the rule to given file.
+func (r *AtomicRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+	walker := atomic{
+		pkgTypesInfo: file.Pkg.TypesInfo,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, file.AST)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *AtomicRule) Name() string {
+	return "atomic"
+}
+
+type atomic struct {
+	pkgTypesInfo *types.Info
+	onFailure    func(lint.Failure)
+}
+
+func (w atomic) Visit(node ast.Node) ast.Visitor {
+	n, ok := node.(*ast.AssignStmt)
+	if !ok {
+		return w
+	}
+
+	if len(n.Lhs) != len(n.Rhs) {
+		return nil // skip assignment sub-tree
+	}
+	if len(n.Lhs) == 1 && n.Tok == token.DEFINE {
+		return nil // skip assignment sub-tree
+	}
+
+	for i, right := range n.Rhs {
+		call, ok := right.(*ast.CallExpr)
+		if !ok {
+			continue
+		}
+		sel, ok := call.Fun.(*ast.SelectorExpr)
+		if !ok {
+			continue
+		}
+		pkgIdent, _ := sel.X.(*ast.Ident)
+		if w.pkgTypesInfo != nil {
+			pkgName, ok := w.pkgTypesInfo.Uses[pkgIdent].(*types.PkgName)
+			if !ok || pkgName.Imported().Path() != "sync/atomic" {
+				continue
+			}
+		}
+
+		switch sel.Sel.Name {
+		case "AddInt32", "AddInt64", "AddUint32", "AddUint64", "AddUintptr":
+			left := n.Lhs[i]
+			if len(call.Args) != 2 {
+				continue
+			}
+			arg := call.Args[0]
+			broken := false
+
+			if uarg, ok := arg.(*ast.UnaryExpr); ok && uarg.Op == token.AND {
+				broken = gofmt(left) == gofmt(uarg.X)
+			} else if star, ok := left.(*ast.StarExpr); ok {
+				broken = gofmt(star.X) == gofmt(arg)
+			}
+
+			if broken {
+				w.onFailure(lint.Failure{
+					Confidence: 1,
+					Failure:    "direct assignment to atomic value",
+					Node:       n,
+				})
+			}
+		}
+	}
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/bare-return.go
+++ b/vendor/github.com/mgechev/revive/rule/bare-return.go
@ -0,0 +1,84 @@
+package rule
+
+import (
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// BareReturnRule lints given else constructs.
+type BareReturnRule struct{}
+
+// Apply applies the rule to given file.
+func (r *BareReturnRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	w := lintBareReturnRule{onFailure: onFailure}
+	ast.Walk(w, file.AST)
+	return failures
+}
+
+// Name returns the rule name.
+func (r *BareReturnRule) Name() string {
+	return "bare-return"
+}
+
+type lintBareReturnRule struct {
+	onFailure func(lint.Failure)
+}
+
+func (w lintBareReturnRule) Visit(node ast.Node) ast.Visitor {
+	switch n := node.(type) {
+	case *ast.FuncDecl:
+		w.checkFunc(n.Type.Results, n.Body)
+	case *ast.FuncLit: // to cope with deferred functions and go-routines
+		w.checkFunc(n.Type.Results, n.Body)
+	}
+
+	return w
+}
+
+// checkFunc will verify if the given function has named result and bare returns
+func (w lintBareReturnRule) checkFunc(results *ast.FieldList, body *ast.BlockStmt) {
+	hasNamedResults := results != nil && len(results.List) > 0 && results.List[0].Names != nil
+	if !hasNamedResults || body == nil {
+		return // nothing to do
+	}
+
+	brf := bareReturnFinder{w.onFailure}
+	ast.Walk(brf, body)
+}
+
+type bareReturnFinder struct {
+	onFailure func(lint.Failure)
+}
+
+func (w bareReturnFinder) Visit(node ast.Node) ast.Visitor {
+	_, ok := node.(*ast.FuncLit)
+	if ok {
+		// skip analysing function literals
+		// they will analyzed by the lintBareReturnRule.Visit method
+		return nil
+	}
+
+	rs, ok := node.(*ast.ReturnStmt)
+	if !ok {
+		return w
+	}
+
+	if len(rs.Results) > 0 {
+		return w
+	}
+
+	w.onFailure(lint.Failure{
+		Confidence: 1,
+		Node:       rs,
+		Failure:    "avoid using bare returns, please add return expressions",
+	})
+
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/blank-imports.go
+++ b/vendor/github.com/mgechev/revive/rule/blank-imports.go
@ -0,0 +1,74 @@
+package rule
+
+import (
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// BlankImportsRule lints given else constructs.
+type BlankImportsRule struct{}
+
+// Apply applies the rule to given file.
+func (r *BlankImportsRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	fileAst := file.AST
+	walker := lintBlankImports{
+		file:    file,
+		fileAst: fileAst,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *BlankImportsRule) Name() string {
+	return "blank-imports"
+}
+
+type lintBlankImports struct {
+	fileAst   *ast.File
+	file      *lint.File
+	onFailure func(lint.Failure)
+}
+
+func (w lintBlankImports) Visit(_ ast.Node) ast.Visitor {
+	// In package main and in tests, we don't complain about blank imports.
+	if w.file.Pkg.IsMain() || w.file.IsTest() {
+		return nil
+	}
+
+	// The first element of each contiguous group of blank imports should have
+	// an explanatory comment of some kind.
+	for i, imp := range w.fileAst.Imports {
+		pos := w.file.ToPosition(imp.Pos())
+
+		if !isBlank(imp.Name) {
+			continue // Ignore non-blank imports.
+		}
+		if i > 0 {
+			prev := w.fileAst.Imports[i-1]
+			prevPos := w.file.ToPosition(prev.Pos())
+			if isBlank(prev.Name) && prevPos.Line+1 == pos.Line {
+				continue // A subsequent blank in a group.
+			}
+		}
+
+		// This is the first blank import of a group.
+		if imp.Doc == nil && imp.Comment == nil {
+			w.onFailure(lint.Failure{
+				Node:       imp,
+				Failure:    "a blank import should be only in a main or test package, or have a comment justifying it",
+				Confidence: 1,
+				Category:   "imports",
+			})
+		}
+	}
+	return nil
+}
--- a/vendor/github.com/mgechev/revive/rule/bool-literal-in-expr.go
+++ b/vendor/github.com/mgechev/revive/rule/bool-literal-in-expr.go
@ -0,0 +1,73 @@
+package rule
+
+import (
+	"go/ast"
+	"go/token"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// BoolLiteralRule warns when logic expressions contains Boolean literals.
+type BoolLiteralRule struct{}
+
+// Apply applies the rule to given file.
+func (r *BoolLiteralRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	astFile := file.AST
+	w := &lintBoolLiteral{astFile, onFailure}
+	ast.Walk(w, astFile)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *BoolLiteralRule) Name() string {
+	return "bool-literal-in-expr"
+}
+
+type lintBoolLiteral struct {
+	file      *ast.File
+	onFailure func(lint.Failure)
+}
+
+func (w *lintBoolLiteral) Visit(node ast.Node) ast.Visitor {
+	switch n := node.(type) {
+	case *ast.BinaryExpr:
+		if !isBoolOp(n.Op) {
+			return w
+		}
+
+		lexeme, ok := isExprABooleanLit(n.X)
+		if !ok {
+			lexeme, ok = isExprABooleanLit(n.Y)
+
+			if !ok {
+				return w
+			}
+		}
+
+		isConstant := (n.Op == token.LAND && lexeme == "false") || (n.Op == token.LOR && lexeme == "true")
+
+		if isConstant {
+			w.addFailure(n, "Boolean expression seems to always evaluate to "+lexeme, "logic")
+		} else {
+			w.addFailure(n, "omit Boolean literal in expression", "style")
+		}
+	}
+
+	return w
+}
+
+func (w lintBoolLiteral) addFailure(node ast.Node, msg string, cat string) {
+	w.onFailure(lint.Failure{
+		Confidence: 1,
+		Node:       node,
+		Category:   cat,
+		Failure:    msg,
+	})
+}
--- a/vendor/github.com/mgechev/revive/rule/call-to-gc.go
+++ b/vendor/github.com/mgechev/revive/rule/call-to-gc.go
@ -0,0 +1,70 @@
+package rule
+
+import (
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// CallToGCRule lints calls to the garbage collector.
+type CallToGCRule struct{}
+
+// Apply applies the rule to given file.
+func (r *CallToGCRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	var gcTriggeringFunctions = map[string]map[string]bool{
+		"runtime": map[string]bool{"GC": true},
+	}
+
+	w := lintCallToGC{onFailure, gcTriggeringFunctions}
+	ast.Walk(w, file.AST)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *CallToGCRule) Name() string {
+	return "call-to-gc"
+}
+
+type lintCallToGC struct {
+	onFailure             func(lint.Failure)
+	gcTriggeringFunctions map[string]map[string]bool
+}
+
+func (w lintCallToGC) Visit(node ast.Node) ast.Visitor {
+	ce, ok := node.(*ast.CallExpr)
+	if !ok {
+		return w // nothing to do, the node is not a call
+	}
+
+	fc, ok := ce.Fun.(*ast.SelectorExpr)
+	if !ok {
+		return nil // nothing to do, the call is not of the form pkg.func(...)
+	}
+
+	id, ok := fc.X.(*ast.Ident)
+
+	if !ok {
+		return nil // in case X is not an id (it should be!)
+	}
+
+	fn := fc.Sel.Name
+	pkg := id.Name
+	if !w.gcTriggeringFunctions[pkg][fn] {
+		return nil // it isn't a call to a GC triggering function
+	}
+
+	w.onFailure(lint.Failure{
+		Confidence: 1,
+		Node:       node,
+		Category:   "bad practice",
+		Failure:    "explicit call to the garbage collector",
+	})
+
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/cognitive-complexity.go
+++ b/vendor/github.com/mgechev/revive/rule/cognitive-complexity.go
@ -0,0 +1,195 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+	"go/token"
+
+	"github.com/mgechev/revive/lint"
+	"golang.org/x/tools/go/ast/astutil"
+)
+
+// CognitiveComplexityRule lints given else constructs.
+type CognitiveComplexityRule struct{}
+
+// Apply applies the rule to given file.
+func (r *CognitiveComplexityRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	const expectedArgumentsCount = 1
+	if len(arguments) < expectedArgumentsCount {
+		panic(fmt.Sprintf("not enough arguments for cognitive-complexity, expected %d, got %d", expectedArgumentsCount, len(arguments)))
+	}
+	complexity, ok := arguments[0].(int64)
+	if !ok {
+		panic(fmt.Sprintf("invalid argument type for cognitive-complexity, expected int64, got %T", arguments[0]))
+	}
+
+	linter := cognitiveComplexityLinter{
+		file:          file,
+		maxComplexity: int(complexity),
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	linter.lint()
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *CognitiveComplexityRule) Name() string {
+	return "cognitive-complexity"
+}
+
+type cognitiveComplexityLinter struct {
+	file          *lint.File
+	maxComplexity int
+	onFailure     func(lint.Failure)
+}
+
+func (w cognitiveComplexityLinter) lint() {
+	f := w.file
+	for _, decl := range f.AST.Decls {
+		if fn, ok := decl.(*ast.FuncDecl); ok {
+			v := cognitiveComplexityVisitor{}
+			c := v.subTreeComplexity(fn.Body)
+			if c > w.maxComplexity {
+				w.onFailure(lint.Failure{
+					Confidence: 1,
+					Category:   "maintenance",
+					Failure:    fmt.Sprintf("function %s has cognitive complexity %d (> max enabled %d)", funcName(fn), c, w.maxComplexity),
+					Node:       fn,
+				})
+			}
+		}
+	}
+}
+
+type cognitiveComplexityVisitor struct {
+	complexity   int
+	nestingLevel int
+}
+
+// subTreeComplexity calculates the cognitive complexity of an AST-subtree.
+func (v cognitiveComplexityVisitor) subTreeComplexity(n ast.Node) int {
+	ast.Walk(&v, n)
+	return v.complexity
+}
+
+// Visit implements the ast.Visitor interface.
+func (v *cognitiveComplexityVisitor) Visit(n ast.Node) ast.Visitor {
+	switch n := n.(type) {
+	case *ast.IfStmt:
+		targets := []ast.Node{n.Cond, n.Body, n.Else}
+		v.walk(1, targets...)
+		return nil
+	case *ast.ForStmt:
+		targets := []ast.Node{n.Cond, n.Body}
+		v.walk(1, targets...)
+		return nil
+	case *ast.RangeStmt:
+		v.walk(1, n.Body)
+		return nil
+	case *ast.SelectStmt:
+		v.walk(1, n.Body)
+		return nil
+	case *ast.SwitchStmt:
+		v.walk(1, n.Body)
+		return nil
+	case *ast.TypeSwitchStmt:
+		v.walk(1, n.Body)
+		return nil
+	case *ast.FuncLit:
+		v.walk(0, n.Body) // do not increment the complexity, just do the nesting
+		return nil
+	case *ast.BinaryExpr:
+		v.complexity += v.binExpComplexity(n)
+		return nil // skip visiting binexp sub-tree (already visited by binExpComplexity)
+	case *ast.BranchStmt:
+		if n.Label != nil {
+			v.complexity += 1
+		}
+	}
+	// TODO handle (at least) direct recursion
+
+	return v
+}
+
+func (v *cognitiveComplexityVisitor) walk(complexityIncrement int, targets ...ast.Node) {
+	v.complexity += complexityIncrement + v.nestingLevel
+	nesting := v.nestingLevel
+	v.nestingLevel++
+
+	for _, t := range targets {
+		if t == nil {
+			continue
+		}
+
+		ast.Walk(v, t)
+	}
+
+	v.nestingLevel = nesting
+}
+
+func (cognitiveComplexityVisitor) binExpComplexity(n *ast.BinaryExpr) int {
+	calculator := binExprComplexityCalculator{opsStack: []token.Token{}}
+
+	astutil.Apply(n, calculator.pre, calculator.post)
+
+	return calculator.complexity
+}
+
+type binExprComplexityCalculator struct {
+	complexity    int
+	opsStack      []token.Token // stack of bool operators
+	subexpStarted bool
+}
+
+func (becc *binExprComplexityCalculator) pre(c *astutil.Cursor) bool {
+	switch n := c.Node().(type) {
+	case *ast.BinaryExpr:
+		isBoolOp := n.Op == token.LAND || n.Op == token.LOR
+		if !isBoolOp {
+			break
+		}
+
+		ops := len(becc.opsStack)
+		// if
+		// 		is the first boolop in the expression OR
+		// 		is the first boolop inside a subexpression (...) OR
+		//		is not the same to the previous one
+		// then
+		//      increment complexity
+		if ops == 0 || becc.subexpStarted || n.Op != becc.opsStack[ops-1] {
+			becc.complexity++
+			becc.subexpStarted = false
+		}
+
+		becc.opsStack = append(becc.opsStack, n.Op)
+	case *ast.ParenExpr:
+		becc.subexpStarted = true
+	}
+
+	return true
+}
+
+func (becc *binExprComplexityCalculator) post(c *astutil.Cursor) bool {
+	switch n := c.Node().(type) {
+	case *ast.BinaryExpr:
+		isBoolOp := n.Op == token.LAND || n.Op == token.LOR
+		if !isBoolOp {
+			break
+		}
+
+		ops := len(becc.opsStack)
+		if ops > 0 {
+			becc.opsStack = becc.opsStack[:ops-1]
+		}
+	case *ast.ParenExpr:
+		becc.subexpStarted = false
+	}
+
+	return true
+}
--- a/vendor/github.com/mgechev/revive/rule/confusing-naming.go
+++ b/vendor/github.com/mgechev/revive/rule/confusing-naming.go
@ -0,0 +1,190 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+
+	"strings"
+	"sync"
+
+	"github.com/mgechev/revive/lint"
+)
+
+type referenceMethod struct {
+	fileName string
+	id       *ast.Ident
+}
+
+type pkgMethods struct {
+	pkg     *lint.Package
+	methods map[string]map[string]*referenceMethod
+	mu      *sync.Mutex
+}
+
+type packages struct {
+	pkgs []pkgMethods
+	mu   sync.Mutex
+}
+
+func (ps *packages) methodNames(lp *lint.Package) pkgMethods {
+	ps.mu.Lock()
+
+	for _, pkg := range ps.pkgs {
+		if pkg.pkg == lp {
+			ps.mu.Unlock()
+			return pkg
+		}
+	}
+
+	pkgm := pkgMethods{pkg: lp, methods: make(map[string]map[string]*referenceMethod), mu: &sync.Mutex{}}
+	ps.pkgs = append(ps.pkgs, pkgm)
+
+	ps.mu.Unlock()
+	return pkgm
+}
+
+var allPkgs = packages{pkgs: make([]pkgMethods, 1)}
+
+// ConfusingNamingRule lints method names that differ only by capitalization
+type ConfusingNamingRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ConfusingNamingRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+	fileAst := file.AST
+	pkgm := allPkgs.methodNames(file.Pkg)
+	walker := lintConfusingNames{
+		fileName: file.Name,
+		pkgm:     pkgm,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(&walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ConfusingNamingRule) Name() string {
+	return "confusing-naming"
+}
+
+//checkMethodName checks if a given method/function name is similar (just case differences) to other method/function of the same struct/file.
+func checkMethodName(holder string, id *ast.Ident, w *lintConfusingNames) {
+	if id.Name == "init" && holder == defaultStructName {
+		// ignore init functions
+		return
+	}
+
+	pkgm := w.pkgm
+	name := strings.ToUpper(id.Name)
+
+	pkgm.mu.Lock()
+	defer pkgm.mu.Unlock()
+
+	if pkgm.methods[holder] != nil {
+		if pkgm.methods[holder][name] != nil {
+			refMethod := pkgm.methods[holder][name]
+			// confusing names
+			var kind string
+			if holder == defaultStructName {
+				kind = "function"
+			} else {
+				kind = "method"
+			}
+			var fileName string
+			if w.fileName == refMethod.fileName {
+				fileName = "the same source file"
+			} else {
+				fileName = refMethod.fileName
+			}
+			w.onFailure(lint.Failure{
+				Failure:    fmt.Sprintf("Method '%s' differs only by capitalization to %s '%s' in %s", id.Name, kind, refMethod.id.Name, fileName),
+				Confidence: 1,
+				Node:       id,
+				Category:   "naming",
+			})
+
+			return
+		}
+	} else {
+		pkgm.methods[holder] = make(map[string]*referenceMethod, 1)
+	}
+
+	// update the black list
+	if pkgm.methods[holder] == nil {
+		println("no entry for '", holder, "'")
+	}
+	pkgm.methods[holder][name] = &referenceMethod{fileName: w.fileName, id: id}
+}
+
+type lintConfusingNames struct {
+	fileName  string
+	pkgm      pkgMethods
+	onFailure func(lint.Failure)
+}
+
+const defaultStructName = "_" // used to map functions
+
+//getStructName of a function receiver. Defaults to defaultStructName
+func getStructName(r *ast.FieldList) string {
+	result := defaultStructName
+
+	if r == nil || len(r.List) < 1 {
+		return result
+	}
+
+	t := r.List[0].Type
+
+	if p, _ := t.(*ast.StarExpr); p != nil { // if a pointer receiver => dereference pointer receiver types
+		t = p.X
+	}
+
+	if p, _ := t.(*ast.Ident); p != nil {
+		result = p.Name
+	}
+
+	return result
+}
+
+func checkStructFields(fields *ast.FieldList, structName string, w *lintConfusingNames) {
+	bl := make(map[string]bool, len(fields.List))
+	for _, f := range fields.List {
+		for _, id := range f.Names {
+			normName := strings.ToUpper(id.Name)
+			if bl[normName] {
+				w.onFailure(lint.Failure{
+					Failure:    fmt.Sprintf("Field '%s' differs only by capitalization to other field in the struct type %s", id.Name, structName),
+					Confidence: 1,
+					Node:       id,
+					Category:   "naming",
+				})
+			} else {
+				bl[normName] = true
+			}
+		}
+	}
+}
+
+func (w *lintConfusingNames) Visit(n ast.Node) ast.Visitor {
+	switch v := n.(type) {
+	case *ast.FuncDecl:
+		// Exclude naming warnings for functions that are exported to C but
+		// not exported in the Go API.
+		// See https://github.com/golang/lint/issues/144.
+		if ast.IsExported(v.Name.Name) || !isCgoExported(v) {
+			checkMethodName(getStructName(v.Recv), v.Name, w)
+		}
+	case *ast.TypeSpec:
+		if s, ok := v.Type.(*ast.StructType); ok {
+			checkStructFields(s.Fields, v.Name.Name, w)
+		}
+
+	default:
+		// will add other checks like field names, struct names, etc.
+	}
+
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/confusing-results.go
+++ b/vendor/github.com/mgechev/revive/rule/confusing-results.go
@ -0,0 +1,67 @@
+package rule
+
+import (
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ConfusingResultsRule lints given function declarations
+type ConfusingResultsRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ConfusingResultsRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	fileAst := file.AST
+	walker := lintConfusingResults{
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ConfusingResultsRule) Name() string {
+	return "confusing-results"
+}
+
+type lintConfusingResults struct {
+	onFailure func(lint.Failure)
+}
+
+func (w lintConfusingResults) Visit(n ast.Node) ast.Visitor {
+	fn, ok := n.(*ast.FuncDecl)
+	if !ok || fn.Type.Results == nil || len(fn.Type.Results.List) < 2 {
+		return w
+	}
+	lastType := ""
+	for _, result := range fn.Type.Results.List {
+		if len(result.Names) > 0 {
+			return w
+		}
+
+		t, ok := result.Type.(*ast.Ident)
+		if !ok {
+			return w
+		}
+
+		if t.Name == lastType {
+			w.onFailure(lint.Failure{
+				Node:       n,
+				Confidence: 1,
+				Category:   "naming",
+				Failure:    "unnamed results of the same type may be confusing, consider using named results",
+			})
+			break
+		}
+		lastType = t.Name
+
+	}
+
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/constant-logical-expr.go
+++ b/vendor/github.com/mgechev/revive/rule/constant-logical-expr.go
@ -0,0 +1,88 @@
+package rule
+
+import (
+	"github.com/mgechev/revive/lint"
+	"go/ast"
+	"go/token"
+)
+
+// ConstantLogicalExprRule warns on constant logical expressions.
+type ConstantLogicalExprRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ConstantLogicalExprRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	astFile := file.AST
+	w := &lintConstantLogicalExpr{astFile, onFailure}
+	ast.Walk(w, astFile)
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ConstantLogicalExprRule) Name() string {
+	return "constant-logical-expr"
+}
+
+type lintConstantLogicalExpr struct {
+	file      *ast.File
+	onFailure func(lint.Failure)
+}
+
+func (w *lintConstantLogicalExpr) Visit(node ast.Node) ast.Visitor {
+	switch n := node.(type) {
+	case *ast.BinaryExpr:
+		if !w.isOperatorWithLogicalResult(n.Op) {
+			return w
+		}
+
+		if gofmt(n.X) != gofmt(n.Y) { // check if subexpressions are the same
+			return w
+		}
+
+		if n.Op == token.EQL {
+			w.newFailure(n, "expression always evaluates to true")
+			return w
+		}
+
+		if w.isInequalityOperator(n.Op) {
+			w.newFailure(n, "expression always evaluates to false")
+			return w
+		}
+
+		w.newFailure(n, "left and right hand-side sub-expressions are the same")
+	}
+
+	return w
+}
+
+func (w *lintConstantLogicalExpr) isOperatorWithLogicalResult(t token.Token) bool {
+	switch t {
+	case token.LAND, token.LOR, token.EQL, token.LSS, token.GTR, token.NEQ, token.LEQ, token.GEQ:
+		return true
+	}
+
+	return false
+}
+
+func (w *lintConstantLogicalExpr) isInequalityOperator(t token.Token) bool {
+	switch t {
+	case token.LSS, token.GTR, token.NEQ, token.LEQ, token.GEQ:
+		return true
+	}
+
+	return false
+}
+
+func (w lintConstantLogicalExpr) newFailure(node ast.Node, msg string) {
+	w.onFailure(lint.Failure{
+		Confidence: 1,
+		Node:       node,
+		Category:   "logic",
+		Failure:    msg,
+	})
+}
--- a/vendor/github.com/mgechev/revive/rule/context-as-argument.go
+++ b/vendor/github.com/mgechev/revive/rule/context-as-argument.go
@ -0,0 +1,60 @@
+package rule
+
+import (
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ContextAsArgumentRule lints given else constructs.
+type ContextAsArgumentRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ContextAsArgumentRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	fileAst := file.AST
+	walker := lintContextArguments{
+		file:    file,
+		fileAst: fileAst,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ContextAsArgumentRule) Name() string {
+	return "context-as-argument"
+}
+
+type lintContextArguments struct {
+	file      *lint.File
+	fileAst   *ast.File
+	onFailure func(lint.Failure)
+}
+
+func (w lintContextArguments) Visit(n ast.Node) ast.Visitor {
+	fn, ok := n.(*ast.FuncDecl)
+	if !ok || len(fn.Type.Params.List) <= 1 {
+		return w
+	}
+	// A context.Context should be the first parameter of a function.
+	// Flag any that show up after the first.
+	for _, arg := range fn.Type.Params.List[1:] {
+		if isPkgDot(arg.Type, "context", "Context") {
+			w.onFailure(lint.Failure{
+				Node:       fn,
+				Category:   "arg-order",
+				Failure:    "context.Context should be the first parameter of a function",
+				Confidence: 0.9,
+			})
+			break // only flag one
+		}
+	}
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/context-keys-type.go
+++ b/vendor/github.com/mgechev/revive/rule/context-keys-type.go
@ -0,0 +1,81 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+	"go/types"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ContextKeysType lints given else constructs.
+type ContextKeysType struct{}
+
+// Apply applies the rule to given file.
+func (r *ContextKeysType) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	fileAst := file.AST
+	walker := lintContextKeyTypes{
+		file:    file,
+		fileAst: fileAst,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	file.Pkg.TypeCheck()
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ContextKeysType) Name() string {
+	return "context-keys-type"
+}
+
+type lintContextKeyTypes struct {
+	file      *lint.File
+	fileAst   *ast.File
+	onFailure func(lint.Failure)
+}
+
+func (w lintContextKeyTypes) Visit(n ast.Node) ast.Visitor {
+	switch n := n.(type) {
+	case *ast.CallExpr:
+		checkContextKeyType(w, n)
+	}
+
+	return w
+}
+
+func checkContextKeyType(w lintContextKeyTypes, x *ast.CallExpr) {
+	f := w.file
+	sel, ok := x.Fun.(*ast.SelectorExpr)
+	if !ok {
+		return
+	}
+	pkg, ok := sel.X.(*ast.Ident)
+	if !ok || pkg.Name != "context" {
+		return
+	}
+	if sel.Sel.Name != "WithValue" {
+		return
+	}
+
+	// key is second argument to context.WithValue
+	if len(x.Args) != 3 {
+		return
+	}
+	key := f.Pkg.TypesInfo.Types[x.Args[1]]
+
+	if ktyp, ok := key.Type.(*types.Basic); ok && ktyp.Kind() != types.Invalid {
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       x,
+			Category:   "content",
+			Failure:    fmt.Sprintf("should not use basic type %s as key in context.WithValue", key.Type),
+		})
+	}
+}
--- a/vendor/github.com/mgechev/revive/rule/cyclomatic.go
+++ b/vendor/github.com/mgechev/revive/rule/cyclomatic.go
@ -0,0 +1,115 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+	"go/token"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// Based on https://github.com/fzipp/gocyclo
+
+// CyclomaticRule lints given else constructs.
+type CyclomaticRule struct{}
+
+// Apply applies the rule to given file.
+func (r *CyclomaticRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	complexity, ok := arguments[0].(int64) // Alt. non panicking version
+	if !ok {
+		panic("invalid argument for cyclomatic complexity")
+	}
+
+	fileAst := file.AST
+	walker := lintCyclomatic{
+		file:       file,
+		complexity: int(complexity),
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *CyclomaticRule) Name() string {
+	return "cyclomatic"
+}
+
+type lintCyclomatic struct {
+	file       *lint.File
+	complexity int
+	onFailure  func(lint.Failure)
+}
+
+func (w lintCyclomatic) Visit(_ ast.Node) ast.Visitor {
+	f := w.file
+	for _, decl := range f.AST.Decls {
+		if fn, ok := decl.(*ast.FuncDecl); ok {
+			c := complexity(fn)
+			if c > w.complexity {
+				w.onFailure(lint.Failure{
+					Confidence: 1,
+					Category:   "maintenance",
+					Failure:    fmt.Sprintf("function %s has cyclomatic complexity %d", funcName(fn), c),
+					Node:       fn,
+				})
+			}
+		}
+	}
+	return nil
+}
+
+// funcName returns the name representation of a function or method:
+// "(Type).Name" for methods or simply "Name" for functions.
+func funcName(fn *ast.FuncDecl) string {
+	if fn.Recv != nil {
+		if fn.Recv.NumFields() > 0 {
+			typ := fn.Recv.List[0].Type
+			return fmt.Sprintf("(%s).%s", recvString(typ), fn.Name)
+		}
+	}
+	return fn.Name.Name
+}
+
+// recvString returns a string representation of recv of the
+// form "T", "*T", or "BADRECV" (if not a proper receiver type).
+func recvString(recv ast.Expr) string {
+	switch t := recv.(type) {
+	case *ast.Ident:
+		return t.Name
+	case *ast.StarExpr:
+		return "*" + recvString(t.X)
+	}
+	return "BADRECV"
+}
+
+// complexity calculates the cyclomatic complexity of a function.
+func complexity(fn *ast.FuncDecl) int {
+	v := complexityVisitor{}
+	ast.Walk(&v, fn)
+	return v.Complexity
+}
+
+type complexityVisitor struct {
+	// Complexity is the cyclomatic complexity
+	Complexity int
+}
+
+// Visit implements the ast.Visitor interface.
+func (v *complexityVisitor) Visit(n ast.Node) ast.Visitor {
+	switch n := n.(type) {
+	case *ast.FuncDecl, *ast.IfStmt, *ast.ForStmt, *ast.RangeStmt, *ast.CaseClause, *ast.CommClause:
+		v.Complexity++
+	case *ast.BinaryExpr:
+		if n.Op == token.LAND || n.Op == token.LOR {
+			v.Complexity++
+		}
+	}
+	return v
+}
--- a/vendor/github.com/mgechev/revive/rule/deep-exit.go
+++ b/vendor/github.com/mgechev/revive/rule/deep-exit.go
@ -0,0 +1,94 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// DeepExitRule lints program exit at functions other than main or init.
+type DeepExitRule struct{}
+
+// Apply applies the rule to given file.
+func (r *DeepExitRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	var exitFunctions = map[string]map[string]bool{
+		"os":      map[string]bool{"Exit": true},
+		"syscall": map[string]bool{"Exit": true},
+		"log": map[string]bool{
+			"Fatal":   true,
+			"Fatalf":  true,
+			"Fatalln": true,
+			"Panic":   true,
+			"Panicf":  true,
+			"Panicln": true,
+		},
+	}
+
+	w := lintDeepExit{onFailure, exitFunctions, file.IsTest()}
+	ast.Walk(w, file.AST)
+	return failures
+}
+
+// Name returns the rule name.
+func (r *DeepExitRule) Name() string {
+	return "deep-exit"
+}
+
+type lintDeepExit struct {
+	onFailure     func(lint.Failure)
+	exitFunctions map[string]map[string]bool
+	isTestFile    bool
+}
+
+func (w lintDeepExit) Visit(node ast.Node) ast.Visitor {
+	if fd, ok := node.(*ast.FuncDecl); ok {
+		if w.mustIgnore(fd) {
+			return nil // skip analysis of this function
+		}
+
+		return w
+	}
+
+	se, ok := node.(*ast.ExprStmt)
+	if !ok {
+		return w
+	}
+	ce, ok := se.X.(*ast.CallExpr)
+	if !ok {
+		return w
+	}
+
+	fc, ok := ce.Fun.(*ast.SelectorExpr)
+	if !ok {
+		return w
+	}
+	id, ok := fc.X.(*ast.Ident)
+	if !ok {
+		return w
+	}
+
+	fn := fc.Sel.Name
+	pkg := id.Name
+	if w.exitFunctions[pkg] != nil && w.exitFunctions[pkg][fn] { // it's a call to an exit function
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       ce,
+			Category:   "bad practice",
+			Failure:    fmt.Sprintf("calls to %s.%s only in main() or init() functions", pkg, fn),
+		})
+	}
+
+	return w
+}
+
+func (w *lintDeepExit) mustIgnore(fd *ast.FuncDecl) bool {
+	fn := fd.Name.Name
+
+	return fn == "init" || fn == "main" || (w.isTestFile && fn == "TestMain")
+}
--- a/vendor/github.com/mgechev/revive/rule/dot-imports.go
+++ b/vendor/github.com/mgechev/revive/rule/dot-imports.go
@ -0,0 +1,54 @@
+package rule
+
+import (
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// DotImportsRule lints given else constructs.
+type DotImportsRule struct{}
+
+// Apply applies the rule to given file.
+func (r *DotImportsRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	fileAst := file.AST
+	walker := lintImports{
+		file:    file,
+		fileAst: fileAst,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *DotImportsRule) Name() string {
+	return "dot-imports"
+}
+
+type lintImports struct {
+	file      *lint.File
+	fileAst   *ast.File
+	onFailure func(lint.Failure)
+}
+
+func (w lintImports) Visit(_ ast.Node) ast.Visitor {
+	for i, is := range w.fileAst.Imports {
+		_ = i
+		if is.Name != nil && is.Name.Name == "." && !w.file.IsTest() {
+			w.onFailure(lint.Failure{
+				Confidence: 1,
+				Failure:    "should not use dot imports",
+				Node:       is,
+				Category:   "imports",
+			})
+		}
+	}
+	return nil
+}
--- a/vendor/github.com/mgechev/revive/rule/duplicated-imports.go
+++ b/vendor/github.com/mgechev/revive/rule/duplicated-imports.go
@ -0,0 +1,39 @@
+package rule
+
+import (
+	"fmt"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// DuplicatedImportsRule lints given else constructs.
+type DuplicatedImportsRule struct{}
+
+// Apply applies the rule to given file.
+func (r *DuplicatedImportsRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	impPaths := map[string]struct{}{}
+	for _, imp := range file.AST.Imports {
+		path := imp.Path.Value
+		_, ok := impPaths[path]
+		if ok {
+			failures = append(failures, lint.Failure{
+				Confidence: 1,
+				Failure:    fmt.Sprintf("Package %s already imported", path),
+				Node:       imp,
+				Category:   "imports",
+			})
+			continue
+		}
+
+		impPaths[path] = struct{}{}
+	}
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *DuplicatedImportsRule) Name() string {
+	return "duplicated-imports"
+}
--- a/vendor/github.com/mgechev/revive/rule/empty-block.go
+++ b/vendor/github.com/mgechev/revive/rule/empty-block.go
@ -0,0 +1,76 @@
+package rule
+
+import (
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// EmptyBlockRule lints given else constructs.
+type EmptyBlockRule struct{}
+
+// Apply applies the rule to given file.
+func (r *EmptyBlockRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	w := lintEmptyBlock{make([]*ast.BlockStmt, 0), onFailure}
+	ast.Walk(w, file.AST)
+	return failures
+}
+
+// Name returns the rule name.
+func (r *EmptyBlockRule) Name() string {
+	return "empty-block"
+}
+
+type lintEmptyBlock struct {
+	ignore    []*ast.BlockStmt
+	onFailure func(lint.Failure)
+}
+
+func (w lintEmptyBlock) Visit(node ast.Node) ast.Visitor {
+	fd, ok := node.(*ast.FuncDecl)
+	if ok {
+		w.ignore = append(w.ignore, fd.Body)
+		return w
+	}
+
+	fl, ok := node.(*ast.FuncLit)
+	if ok {
+		w.ignore = append(w.ignore, fl.Body)
+		return w
+	}
+
+	block, ok := node.(*ast.BlockStmt)
+	if !ok {
+		return w
+	}
+
+	if mustIgnore(block, w.ignore) {
+		return w
+	}
+
+	if len(block.List) == 0 {
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       block,
+			Category:   "logic",
+			Failure:    "this block is empty, you can remove it",
+		})
+	}
+
+	return w
+}
+
+func mustIgnore(block *ast.BlockStmt, blackList []*ast.BlockStmt) bool {
+	for _, b := range blackList {
+		if b == block {
+			return true
+		}
+	}
+	return false
+}
--- a/vendor/github.com/mgechev/revive/rule/empty-lines.go
+++ b/vendor/github.com/mgechev/revive/rule/empty-lines.go
@ -0,0 +1,113 @@
+package rule
+
+import (
+	"go/ast"
+	"go/token"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// EmptyLinesRule lints empty lines in blocks.
+type EmptyLinesRule struct{}
+
+// Apply applies the rule to given file.
+func (r *EmptyLinesRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	w := lintEmptyLines{file, file.CommentMap(), onFailure}
+	ast.Walk(w, file.AST)
+	return failures
+}
+
+// Name returns the rule name.
+func (r *EmptyLinesRule) Name() string {
+	return "empty-lines"
+}
+
+type lintEmptyLines struct {
+	file      *lint.File
+	cmap      ast.CommentMap
+	onFailure func(lint.Failure)
+}
+
+func (w lintEmptyLines) Visit(node ast.Node) ast.Visitor {
+	block, ok := node.(*ast.BlockStmt)
+	if !ok {
+		return w
+	}
+
+	w.checkStart(block)
+	w.checkEnd(block)
+
+	return w
+}
+
+func (w lintEmptyLines) checkStart(block *ast.BlockStmt) {
+	if len(block.List) == 0 {
+		return
+	}
+
+	start := w.position(block.Lbrace)
+	firstNode := block.List[0]
+
+	if w.commentBetween(start, firstNode) {
+		return
+	}
+
+	first := w.position(firstNode.Pos())
+	if first.Line-start.Line > 1 {
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       block,
+			Category:   "style",
+			Failure:    "extra empty line at the start of a block",
+		})
+	}
+}
+
+func (w lintEmptyLines) checkEnd(block *ast.BlockStmt) {
+	if len(block.List) < 1 {
+		return
+	}
+
+	end := w.position(block.Rbrace)
+	lastNode := block.List[len(block.List)-1]
+
+	if w.commentBetween(end, lastNode) {
+		return
+	}
+
+	last := w.position(lastNode.End())
+	if end.Line-last.Line > 1 {
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       lastNode,
+			Category:   "style",
+			Failure:    "extra empty line at the end of a block",
+		})
+	}
+}
+
+func (w lintEmptyLines) commentBetween(position token.Position, node ast.Node) bool {
+	comments := w.cmap.Filter(node).Comments()
+	if len(comments) == 0 {
+		return false
+	}
+
+	for _, comment := range comments {
+		start, end := w.position(comment.Pos()), w.position(comment.End())
+		if start.Line-position.Line == 1 || position.Line-end.Line == 1 {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (w lintEmptyLines) position(pos token.Pos) token.Position {
+	return w.file.ToPosition(pos)
+}
--- a/vendor/github.com/mgechev/revive/rule/error-naming.go
+++ b/vendor/github.com/mgechev/revive/rule/error-naming.go
@ -0,0 +1,79 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+	"go/token"
+	"strings"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ErrorNamingRule lints given else constructs.
+type ErrorNamingRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ErrorNamingRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	fileAst := file.AST
+	walker := lintErrors{
+		file:    file,
+		fileAst: fileAst,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ErrorNamingRule) Name() string {
+	return "error-naming"
+}
+
+type lintErrors struct {
+	file      *lint.File
+	fileAst   *ast.File
+	onFailure func(lint.Failure)
+}
+
+func (w lintErrors) Visit(_ ast.Node) ast.Visitor {
+	for _, decl := range w.fileAst.Decls {
+		gd, ok := decl.(*ast.GenDecl)
+		if !ok || gd.Tok != token.VAR {
+			continue
+		}
+		for _, spec := range gd.Specs {
+			spec := spec.(*ast.ValueSpec)
+			if len(spec.Names) != 1 || len(spec.Values) != 1 {
+				continue
+			}
+			ce, ok := spec.Values[0].(*ast.CallExpr)
+			if !ok {
+				continue
+			}
+			if !isPkgDot(ce.Fun, "errors", "New") && !isPkgDot(ce.Fun, "fmt", "Errorf") {
+				continue
+			}
+
+			id := spec.Names[0]
+			prefix := "err"
+			if id.IsExported() {
+				prefix = "Err"
+			}
+			if !strings.HasPrefix(id.Name, prefix) {
+				w.onFailure(lint.Failure{
+					Node:       id,
+					Confidence: 0.9,
+					Category:   "naming",
+					Failure:    fmt.Sprintf("error var %s should have name of the form %sFoo", id.Name, prefix),
+				})
+			}
+		}
+	}
+	return nil
+}
--- a/vendor/github.com/mgechev/revive/rule/error-return.go
+++ b/vendor/github.com/mgechev/revive/rule/error-return.go
@ -0,0 +1,67 @@
+package rule
+
+import (
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ErrorReturnRule lints given else constructs.
+type ErrorReturnRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ErrorReturnRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	fileAst := file.AST
+	walker := lintErrorReturn{
+		file:    file,
+		fileAst: fileAst,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ErrorReturnRule) Name() string {
+	return "error-return"
+}
+
+type lintErrorReturn struct {
+	file      *lint.File
+	fileAst   *ast.File
+	onFailure func(lint.Failure)
+}
+
+func (w lintErrorReturn) Visit(n ast.Node) ast.Visitor {
+	fn, ok := n.(*ast.FuncDecl)
+	if !ok || fn.Type.Results == nil {
+		return w
+	}
+	ret := fn.Type.Results.List
+	if len(ret) <= 1 {
+		return w
+	}
+	if isIdent(ret[len(ret)-1].Type, "error") {
+		return nil
+	}
+	// An error return parameter should be the last parameter.
+	// Flag any error parameters found before the last.
+	for _, r := range ret[:len(ret)-1] {
+		if isIdent(r.Type, "error") {
+			w.onFailure(lint.Failure{
+				Category:   "arg-order",
+				Confidence: 0.9,
+				Node:       fn,
+				Failure:    "error should be the last type when returning multiple items",
+			})
+			break // only flag one
+		}
+	}
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/error-strings.go
+++ b/vendor/github.com/mgechev/revive/rule/error-strings.go
@ -0,0 +1,98 @@
+package rule
+
+import (
+	"go/ast"
+	"go/token"
+	"strconv"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ErrorStringsRule lints given else constructs.
+type ErrorStringsRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ErrorStringsRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	fileAst := file.AST
+	walker := lintErrorStrings{
+		file:    file,
+		fileAst: fileAst,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ErrorStringsRule) Name() string {
+	return "error-strings"
+}
+
+type lintErrorStrings struct {
+	file      *lint.File
+	fileAst   *ast.File
+	onFailure func(lint.Failure)
+}
+
+func (w lintErrorStrings) Visit(n ast.Node) ast.Visitor {
+	ce, ok := n.(*ast.CallExpr)
+	if !ok {
+		return w
+	}
+	if !isPkgDot(ce.Fun, "errors", "New") && !isPkgDot(ce.Fun, "fmt", "Errorf") {
+		return w
+	}
+	if len(ce.Args) < 1 {
+		return w
+	}
+	str, ok := ce.Args[0].(*ast.BasicLit)
+	if !ok || str.Kind != token.STRING {
+		return w
+	}
+	s, _ := strconv.Unquote(str.Value) // can assume well-formed Go
+	if s == "" {
+		return w
+	}
+	clean, conf := lintErrorString(s)
+	if clean {
+		return w
+	}
+
+	w.onFailure(lint.Failure{
+		Node:       str,
+		Confidence: conf,
+		Category:   "errors",
+		Failure:    "error strings should not be capitalized or end with punctuation or a newline",
+	})
+	return w
+}
+
+func lintErrorString(s string) (isClean bool, conf float64) {
+	const basicConfidence = 0.8
+	const capConfidence = basicConfidence - 0.2
+	first, firstN := utf8.DecodeRuneInString(s)
+	last, _ := utf8.DecodeLastRuneInString(s)
+	if last == '.' || last == ':' || last == '!' || last == '\n' {
+		return false, basicConfidence
+	}
+	if unicode.IsUpper(first) {
+		// People use proper nouns and exported Go identifiers in error strings,
+		// so decrease the confidence of warnings for capitalization.
+		if len(s) <= firstN {
+			return false, capConfidence
+		}
+		// Flag strings starting with something that doesn't look like an initialism.
+		if second, _ := utf8.DecodeRuneInString(s[firstN:]); !unicode.IsUpper(second) {
+			return false, capConfidence
+		}
+	}
+	return true, 0
+}
--- a/vendor/github.com/mgechev/revive/rule/errorf.go
+++ b/vendor/github.com/mgechev/revive/rule/errorf.go
@ -0,0 +1,93 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+	"regexp"
+	"strings"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ErrorfRule lints given else constructs.
+type ErrorfRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ErrorfRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	fileAst := file.AST
+	walker := lintErrorf{
+		file:    file,
+		fileAst: fileAst,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	file.Pkg.TypeCheck()
+	ast.Walk(walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ErrorfRule) Name() string {
+	return "errorf"
+}
+
+type lintErrorf struct {
+	file      *lint.File
+	fileAst   *ast.File
+	onFailure func(lint.Failure)
+}
+
+func (w lintErrorf) Visit(n ast.Node) ast.Visitor {
+	ce, ok := n.(*ast.CallExpr)
+	if !ok || len(ce.Args) != 1 {
+		return w
+	}
+	isErrorsNew := isPkgDot(ce.Fun, "errors", "New")
+	var isTestingError bool
+	se, ok := ce.Fun.(*ast.SelectorExpr)
+	if ok && se.Sel.Name == "Error" {
+		if typ := w.file.Pkg.TypeOf(se.X); typ != nil {
+			isTestingError = typ.String() == "*testing.T"
+		}
+	}
+	if !isErrorsNew && !isTestingError {
+		return w
+	}
+	arg := ce.Args[0]
+	ce, ok = arg.(*ast.CallExpr)
+	if !ok || !isPkgDot(ce.Fun, "fmt", "Sprintf") {
+		return w
+	}
+	errorfPrefix := "fmt"
+	if isTestingError {
+		errorfPrefix = w.file.Render(se.X)
+	}
+
+	failure := lint.Failure{
+		Category:   "errors",
+		Node:       n,
+		Confidence: 1,
+		Failure:    fmt.Sprintf("should replace %s(fmt.Sprintf(...)) with %s.Errorf(...)", w.file.Render(se), errorfPrefix),
+	}
+
+	m := srcLineWithMatch(w.file, ce, `^(.*)`+w.file.Render(se)+`\(fmt\.Sprintf\((.*)\)\)(.*)$`)
+	if m != nil {
+		failure.ReplacementLine = m[1] + errorfPrefix + ".Errorf(" + m[2] + ")" + m[3]
+	}
+
+	w.onFailure(failure)
+
+	return w
+}
+
+func srcLineWithMatch(file *lint.File, node ast.Node, pattern string) (m []string) {
+	line := srcLine(file.Content(), file.ToPosition(node.Pos()))
+	line = strings.TrimSuffix(line, "\n")
+	rx := regexp.MustCompile(pattern)
+	return rx.FindStringSubmatch(line)
+}
--- a/vendor/github.com/mgechev/revive/rule/exported.go
+++ b/vendor/github.com/mgechev/revive/rule/exported.go
@ -0,0 +1,272 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+	"go/token"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ExportedRule lints given else constructs.
+type ExportedRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ExportedRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	if isTest(file) {
+		return failures
+	}
+
+	fileAst := file.AST
+	walker := lintExported{
+		file:    file,
+		fileAst: fileAst,
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+		genDeclMissingComments: make(map[*ast.GenDecl]bool),
+	}
+
+	ast.Walk(&walker, fileAst)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ExportedRule) Name() string {
+	return "exported"
+}
+
+type lintExported struct {
+	file                   *lint.File
+	fileAst                *ast.File
+	lastGen                *ast.GenDecl
+	genDeclMissingComments map[*ast.GenDecl]bool
+	onFailure              func(lint.Failure)
+}
+
+func (w *lintExported) lintFuncDoc(fn *ast.FuncDecl) {
+	if !ast.IsExported(fn.Name.Name) {
+		// func is unexported
+		return
+	}
+	kind := "function"
+	name := fn.Name.Name
+	if fn.Recv != nil && len(fn.Recv.List) > 0 {
+		// method
+		kind = "method"
+		recv := receiverType(fn)
+		if !ast.IsExported(recv) {
+			// receiver is unexported
+			return
+		}
+		if commonMethods[name] {
+			return
+		}
+		switch name {
+		case "Len", "Less", "Swap":
+			if w.file.Pkg.Sortable[recv] {
+				return
+			}
+		}
+		name = recv + "." + name
+	}
+	if fn.Doc == nil {
+		w.onFailure(lint.Failure{
+			Node:       fn,
+			Confidence: 1,
+			Category:   "comments",
+			Failure:    fmt.Sprintf("exported %s %s should have comment or be unexported", kind, name),
+		})
+		return
+	}
+	s := normalizeText(fn.Doc.Text())
+	prefix := fn.Name.Name + " "
+	if !strings.HasPrefix(s, prefix) {
+		w.onFailure(lint.Failure{
+			Node:       fn.Doc,
+			Confidence: 0.8,
+			Category:   "comments",
+			Failure:    fmt.Sprintf(`comment on exported %s %s should be of the form "%s..."`, kind, name, prefix),
+		})
+	}
+}
+
+func (w *lintExported) checkStutter(id *ast.Ident, thing string) {
+	pkg, name := w.fileAst.Name.Name, id.Name
+	if !ast.IsExported(name) {
+		// unexported name
+		return
+	}
+	// A name stutters if the package name is a strict prefix
+	// and the next character of the name starts a new word.
+	if len(name) <= len(pkg) {
+		// name is too short to stutter.
+		// This permits the name to be the same as the package name.
+		return
+	}
+	if !strings.EqualFold(pkg, name[:len(pkg)]) {
+		return
+	}
+	// We can assume the name is well-formed UTF-8.
+	// If the next rune after the package name is uppercase or an underscore
+	// the it's starting a new word and thus this name stutters.
+	rem := name[len(pkg):]
+	if next, _ := utf8.DecodeRuneInString(rem); next == '_' || unicode.IsUpper(next) {
+		w.onFailure(lint.Failure{
+			Node:       id,
+			Confidence: 0.8,
+			Category:   "naming",
+			Failure:    fmt.Sprintf("%s name will be used as %s.%s by other packages, and that stutters; consider calling this %s", thing, pkg, name, rem),
+		})
+	}
+}
+
+func (w *lintExported) lintTypeDoc(t *ast.TypeSpec, doc *ast.CommentGroup) {
+	if !ast.IsExported(t.Name.Name) {
+		return
+	}
+	if doc == nil {
+		w.onFailure(lint.Failure{
+			Node:       t,
+			Confidence: 1,
+			Category:   "comments",
+			Failure:    fmt.Sprintf("exported type %v should have comment or be unexported", t.Name),
+		})
+		return
+	}
+
+	s := normalizeText(doc.Text())
+	articles := [...]string{"A", "An", "The", "This"}
+	for _, a := range articles {
+		if t.Name.Name == a {
+			continue
+		}
+		if strings.HasPrefix(s, a+" ") {
+			s = s[len(a)+1:]
+			break
+		}
+	}
+	if !strings.HasPrefix(s, t.Name.Name+" ") {
+		w.onFailure(lint.Failure{
+			Node:       doc,
+			Confidence: 1,
+			Category:   "comments",
+			Failure:    fmt.Sprintf(`comment on exported type %v should be of the form "%v ..." (with optional leading article)`, t.Name, t.Name),
+		})
+	}
+}
+
+func (w *lintExported) lintValueSpecDoc(vs *ast.ValueSpec, gd *ast.GenDecl, genDeclMissingComments map[*ast.GenDecl]bool) {
+	kind := "var"
+	if gd.Tok == token.CONST {
+		kind = "const"
+	}
+
+	if len(vs.Names) > 1 {
+		// Check that none are exported except for the first.
+		for _, n := range vs.Names[1:] {
+			if ast.IsExported(n.Name) {
+				w.onFailure(lint.Failure{
+					Category:   "comments",
+					Confidence: 1,
+					Failure:    fmt.Sprintf("exported %s %s should have its own declaration", kind, n.Name),
+					Node:       vs,
+				})
+				return
+			}
+		}
+	}
+
+	// Only one name.
+	name := vs.Names[0].Name
+	if !ast.IsExported(name) {
+		return
+	}
+
+	if vs.Doc == nil && gd.Doc == nil {
+		if genDeclMissingComments[gd] {
+			return
+		}
+		block := ""
+		if kind == "const" && gd.Lparen.IsValid() {
+			block = " (or a comment on this block)"
+		}
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       vs,
+			Category:   "comments",
+			Failure:    fmt.Sprintf("exported %s %s should have comment%s or be unexported", kind, name, block),
+		})
+		genDeclMissingComments[gd] = true
+		return
+	}
+	// If this GenDecl has parens and a comment, we don't check its comment form.
+	if gd.Lparen.IsValid() && gd.Doc != nil {
+		return
+	}
+	// The relevant text to check will be on either vs.Doc or gd.Doc.
+	// Use vs.Doc preferentially.
+	doc := vs.Doc
+	if doc == nil {
+		doc = gd.Doc
+	}
+	prefix := name + " "
+	s := normalizeText(doc.Text())
+	if !strings.HasPrefix(s, prefix) {
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       doc,
+			Category:   "comments",
+			Failure:    fmt.Sprintf(`comment on exported %s %s should be of the form "%s..."`, kind, name, prefix),
+		})
+	}
+}
+
+// normalizeText is a helper function that normalizes comment strings by:
+// * removing one leading space
+//
+// This function is needed because ast.CommentGroup.Text() does not handle //-style and /*-style comments uniformly
+func normalizeText(t string) string {
+	return strings.TrimPrefix(t, " ")
+}
+
+func (w *lintExported) Visit(n ast.Node) ast.Visitor {
+	switch v := n.(type) {
+	case *ast.GenDecl:
+		if v.Tok == token.IMPORT {
+			return nil
+		}
+		// token.CONST, token.TYPE or token.VAR
+		w.lastGen = v
+		return w
+	case *ast.FuncDecl:
+		w.lintFuncDoc(v)
+		if v.Recv == nil {
+			// Only check for stutter on functions, not methods.
+			// Method names are not used package-qualified.
+			w.checkStutter(v.Name, "func")
+		}
+		// Don't proceed inside funcs.
+		return nil
+	case *ast.TypeSpec:
+		// inside a GenDecl, which usually has the doc
+		doc := v.Doc
+		if doc == nil {
+			doc = w.lastGen.Doc
+		}
+		w.lintTypeDoc(v, doc)
+		w.checkStutter(v.Name, "type")
+		// Don't proceed inside types.
+		return nil
+	case *ast.ValueSpec:
+		w.lintValueSpecDoc(v, w.lastGen, w.genDeclMissingComments)
+		return nil
+	}
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/file-header.go
+++ b/vendor/github.com/mgechev/revive/rule/file-header.go
@ -0,0 +1,69 @@
+package rule
+
+import (
+	"regexp"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// FileHeaderRule lints given else constructs.
+type FileHeaderRule struct{}
+
+var (
+	multiRegexp  = regexp.MustCompile("^/\\*")
+	singleRegexp = regexp.MustCompile("^//")
+)
+
+// Apply applies the rule to given file.
+func (r *FileHeaderRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
+	if len(arguments) != 1 {
+		panic(`invalid configuration for "file-header" rule`)
+	}
+
+	header, ok := arguments[0].(string)
+	if !ok {
+		panic(`invalid argument for "file-header" rule: first argument should be a string`)
+	}
+
+	failure := []lint.Failure{
+		{
+			Node:       file.AST,
+			Confidence: 1,
+			Failure:    "the file doesn't have an appropriate header",
+		},
+	}
+
+	if len(file.AST.Comments) == 0 {
+		return failure
+	}
+
+	g := file.AST.Comments[0]
+	if g == nil {
+		return failure
+	}
+	comment := ""
+	for _, c := range g.List {
+		text := c.Text
+		if multiRegexp.Match([]byte(text)) {
+			text = text[2 : len(text)-2]
+		} else if singleRegexp.Match([]byte(text)) {
+			text = text[2:]
+		}
+		comment += text
+	}
+
+	regex, err := regexp.Compile(header)
+	if err != nil {
+		panic(err.Error())
+	}
+
+	if !regex.Match([]byte(comment)) {
+		return failure
+	}
+	return nil
+}
+
+// Name returns the rule name.
+func (r *FileHeaderRule) Name() string {
+	return "file-header"
+}
--- a/vendor/github.com/mgechev/revive/rule/flag-param.go
+++ b/vendor/github.com/mgechev/revive/rule/flag-param.go
@ -0,0 +1,104 @@
+package rule
+
+import (
+	"fmt"
+	"github.com/mgechev/revive/lint"
+	"go/ast"
+)
+
+// FlagParamRule lints given else constructs.
+type FlagParamRule struct{}
+
+// Apply applies the rule to given file.
+func (r *FlagParamRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	w := lintFlagParamRule{onFailure: onFailure}
+	ast.Walk(w, file.AST)
+	return failures
+}
+
+// Name returns the rule name.
+func (r *FlagParamRule) Name() string {
+	return "flag-parameter"
+}
+
+type lintFlagParamRule struct {
+	onFailure func(lint.Failure)
+}
+
+func (w lintFlagParamRule) Visit(node ast.Node) ast.Visitor {
+	fd, ok := node.(*ast.FuncDecl)
+	if !ok {
+		return w
+	}
+
+	if fd.Body == nil {
+		return nil // skip whole function declaration
+	}
+
+	for _, p := range fd.Type.Params.List {
+		t := p.Type
+
+		id, ok := t.(*ast.Ident)
+		if !ok {
+			continue
+		}
+
+		if id.Name != "bool" {
+			continue
+		}
+
+		cv := conditionVisitor{p.Names, fd, w}
+		ast.Walk(cv, fd.Body)
+	}
+
+	return w
+}
+
+type conditionVisitor struct {
+	ids    []*ast.Ident
+	fd     *ast.FuncDecl
+	linter lintFlagParamRule
+}
+
+func (w conditionVisitor) Visit(node ast.Node) ast.Visitor {
+	ifStmt, ok := node.(*ast.IfStmt)
+	if !ok {
+		return w
+	}
+
+	fselect := func(n ast.Node) bool {
+		ident, ok := n.(*ast.Ident)
+		if !ok {
+			return false
+		}
+
+		for _, id := range w.ids {
+			if ident.Name == id.Name {
+				return true
+			}
+		}
+
+		return false
+	}
+
+	uses := pick(ifStmt.Cond, fselect, nil)
+
+	if len(uses) < 1 {
+		return w
+	}
+
+	w.linter.onFailure(lint.Failure{
+		Confidence: 1,
+		Node:       w.fd.Type.Params,
+		Category:   "bad practice",
+		Failure:    fmt.Sprintf("parameter '%s' seems to be a control flag, avoid control coupling", uses[0]),
+	})
+
+	return nil
+}
--- a/vendor/github.com/mgechev/revive/rule/function-result-limit.go
+++ b/vendor/github.com/mgechev/revive/rule/function-result-limit.go
@ -0,0 +1,68 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// FunctionResultsLimitRule lints given else constructs.
+type FunctionResultsLimitRule struct{}
+
+// Apply applies the rule to given file.
+func (r *FunctionResultsLimitRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
+	if len(arguments) != 1 {
+		panic(`invalid configuration for "function-result-limit"`)
+	}
+
+	max, ok := arguments[0].(int64) // Alt. non panicking version
+	if !ok {
+		panic(fmt.Sprintf(`invalid value passed as return results number to the "function-result-limit" rule; need int64 but got %T`, arguments[0]))
+	}
+	if max < 0 {
+		panic(`the value passed as return results number to the "function-result-limit" rule cannot be negative`)
+	}
+
+	var failures []lint.Failure
+
+	walker := lintFunctionResultsNum{
+		max: int(max),
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, file.AST)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *FunctionResultsLimitRule) Name() string {
+	return "function-result-limit"
+}
+
+type lintFunctionResultsNum struct {
+	max       int
+	onFailure func(lint.Failure)
+}
+
+func (w lintFunctionResultsNum) Visit(n ast.Node) ast.Visitor {
+	node, ok := n.(*ast.FuncDecl)
+	if ok {
+		num := 0
+		if node.Type.Results != nil {
+			num = node.Type.Results.NumFields()
+		}
+		if num > w.max {
+			w.onFailure(lint.Failure{
+				Confidence: 1,
+				Failure:    fmt.Sprintf("maximum number of return results per function exceeded; max %d but got %d", w.max, num),
+				Node:       node.Type,
+			})
+			return w
+		}
+	}
+	return w
+}
--- a/vendor/github.com/mgechev/revive/rule/get-return.go
+++ b/vendor/github.com/mgechev/revive/rule/get-return.go
@ -0,0 +1,70 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+	"strings"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// GetReturnRule lints given else constructs.
+type GetReturnRule struct{}
+
+// Apply applies the rule to given file.
+func (r *GetReturnRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	w := lintReturnRule{onFailure}
+	ast.Walk(w, file.AST)
+	return failures
+}
+
+// Name returns the rule name.
+func (r *GetReturnRule) Name() string {
+	return "get-return"
+}
+
+type lintReturnRule struct {
+	onFailure func(lint.Failure)
+}
+
+func isGetter(name string) bool {
+	if strings.HasPrefix(strings.ToUpper(name), "GET") {
+		if len(name) > 3 {
+			c := name[3]
+			return !(c >= 'a' && c <= 'z')
+		}
+	}
+
+	return false
+}
+
+func hasResults(rs *ast.FieldList) bool {
+	return rs != nil && len(rs.List) > 0
+}
+
+func (w lintReturnRule) Visit(node ast.Node) ast.Visitor {
+	fd, ok := node.(*ast.FuncDecl)
+	if !ok {
+		return w
+	}
+
+	if !isGetter(fd.Name.Name) {
+		return w
+	}
+	if !hasResults(fd.Type.Results) {
+		w.onFailure(lint.Failure{
+			Confidence: 0.8,
+			Node:       fd,
+			Category:   "logic",
+			Failure:    fmt.Sprintf("function '%s' seems to be a getter but it does not return any result", fd.Name.Name),
+		})
+	}
+
+	return w
+}
--- a/Show more
+++ b/Show more