Use gitea forked macaron (#7933)

Signed-off-by: Tamal Saha <tamal@appscode.com>

vendor/github.com/unknwon/com/file.go

@@ -0,0 +1,145 @@
+// Copyright 2013 com authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package com
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math"
+	"os"
+	"path"
+)
+
+// Storage unit constants.
+const (
+	Byte  = 1
+	KByte = Byte * 1024
+	MByte = KByte * 1024
+	GByte = MByte * 1024
+	TByte = GByte * 1024
+	PByte = TByte * 1024
+	EByte = PByte * 1024
+)
+
+func logn(n, b float64) float64 {
+	return math.Log(n) / math.Log(b)
+}
+
+func humanateBytes(s uint64, base float64, sizes []string) string {
+	if s < 10 {
+		return fmt.Sprintf("%dB", s)
+	}
+	e := math.Floor(logn(float64(s), base))
+	suffix := sizes[int(e)]
+	val := float64(s) / math.Pow(base, math.Floor(e))
+	f := "%.0f"
+	if val < 10 {
+		f = "%.1f"
+	}
+
+	return fmt.Sprintf(f+"%s", val, suffix)
+}
+
+// HumaneFileSize calculates the file size and generate user-friendly string.
+func HumaneFileSize(s uint64) string {
+	sizes := []string{"B", "KB", "MB", "GB", "TB", "PB", "EB"}
+	return humanateBytes(s, 1024, sizes)
+}
+
+// FileMTime returns file modified time and possible error.
+func FileMTime(file string) (int64, error) {
+	f, err := os.Stat(file)
+	if err != nil {
+		return 0, err
+	}
+	return f.ModTime().Unix(), nil
+}
+
+// FileSize returns file size in bytes and possible error.
+func FileSize(file string) (int64, error) {
+	f, err := os.Stat(file)
+	if err != nil {
+		return 0, err
+	}
+	return f.Size(), nil
+}
+
+// Copy copies file from source to target path.
+func Copy(src, dest string) error {
+	// Gather file information to set back later.
+	si, err := os.Lstat(src)
+	if err != nil {
+		return err
+	}
+
+	// Handle symbolic link.
+	if si.Mode()&os.ModeSymlink != 0 {
+		target, err := os.Readlink(src)
+		if err != nil {
+			return err
+		}
+		// NOTE: os.Chmod and os.Chtimes don't recoganize symbolic link,
+		// which will lead "no such file or directory" error.
+		return os.Symlink(target, dest)
+	}
+
+	sr, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer sr.Close()
+
+	dw, err := os.Create(dest)
+	if err != nil {
+		return err
+	}
+	defer dw.Close()
+
+	if _, err = io.Copy(dw, sr); err != nil {
+		return err
+	}
+
+	// Set back file information.
+	if err = os.Chtimes(dest, si.ModTime(), si.ModTime()); err != nil {
+		return err
+	}
+	return os.Chmod(dest, si.Mode())
+}
+
+// WriteFile writes data to a file named by filename.
+// If the file does not exist, WriteFile creates it
+// and its upper level paths.
+func WriteFile(filename string, data []byte) error {
+	os.MkdirAll(path.Dir(filename), os.ModePerm)
+	return ioutil.WriteFile(filename, data, 0655)
+}
+
+// IsFile returns true if given path is a file,
+// or returns false when it's a directory or does not exist.
+func IsFile(filePath string) bool {
+	f, e := os.Stat(filePath)
+	if e != nil {
+		return false
+	}
+	return !f.IsDir()
+}
+
+// IsExist checks whether a file or directory exists.
+// It returns false when the file or directory does not exist.
+func IsExist(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil || os.IsExist(err)
+}