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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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Compression and Archive Extensions
==================================
[![Go Walker](http://gowalker.org/api/v1/badge)](http://gowalker.org/github.com/Unknwon/cae)
[中文文档](README_ZH.md)
Package cae implements PHP-like Compression and Archive Extensions.
But this package has some modifications depends on Go-style.
Reference: [PHP:Compression and Archive Extensions](http://www.php.net/manual/en/refs.compression.php).
Code Convention: based on [Go Code Convention](https://github.com/Unknwon/go-code-convention).
### Implementations
Package `zip`([Go Walker](http://gowalker.org/github.com/Unknwon/cae/zip)) and `tz`([Go Walker](http://gowalker.org/github.com/Unknwon/cae/tz)) both enable you to transparently read or write ZIP/TAR.GZ compressed archives and the files inside them.
- Features:
- Add file or directory from everywhere to archive, no one-to-one limitation.
- Extract part of entries, not all at once.
- Stream data directly into `io.Writer` without any file system storage.
### Test cases and Coverage
All subpackages use [GoConvey](http://goconvey.co/) to write test cases, and coverage is more than 80 percent.
### Use cases
- [Gogs](https://github.com/gogits/gogs): self hosted Git service in the Go Programming Language.
- [GoBlog](https://github.com/fuxiaohei/GoBlog): personal blogging application.
- [GoBuild](https://github.com/shxsun/gobuild/): online Go cross-platform compilation and download service.
## License
This project is under Apache v2 License. See the [LICENSE](LICENSE) file for the full license text.

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压缩与打包扩展
=============
[![Go Walker](http://gowalker.org/api/v1/badge)](http://gowalker.org/github.com/Unknwon/cae)
包 cae 实现了 PHP 风格的压缩与打包扩展。
但本包依据 Go 语言的风格进行了一些修改。
引用：[PHP:Compression and Archive Extensions](http://www.php.net/manual/en/refs.compression.php)
编码规范：基于 [Go 编码规范](https://github.com/Unknwon/go-code-convention)
### 实现
包 `zip`([Go Walker](http://gowalker.org/github.com/Unknwon/cae/zip)) 和 `tz`([Go Walker](http://gowalker.org/github.com/Unknwon/cae/tz)) 都允许你轻易的读取或写入 ZIP/TAR.GZ 压缩档案和其内部文件。
- 特性：
- 将任意位置的文件或目录加入档案，没有一对一的操作限制。
- 只解压部分文件，而非一次性解压全部。
- 将数据以流的形式直接写入 `io.Writer` 而不需经过文件系统的存储。
### 测试用例与覆盖率
所有子包均采用 [GoConvey](http://goconvey.co/) 来书写测试用例，覆盖率均超过 80%。
## 授权许可
本项目采用 Apache v2 开源授权许可证，完整的授权说明已放置在 [LICENSE](LICENSE) 文件中。

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// Copyright 2013 Unknown
//
// 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 cae implements PHP-like Compression and Archive Extensions.
package cae
import (
"io"
"os"
"strings"
)
// A Streamer describes an streamable archive object.
type Streamer interface {
StreamFile(string, os.FileInfo, []byte) error
StreamReader(string, os.FileInfo, io.Reader) error
Close() error
}
// A HookFunc represents a middleware for packing and extracting archive.
type HookFunc func(string, os.FileInfo) error
// HasPrefix returns true if name has any string in given slice as prefix.
func HasPrefix(name string, prefixes []string) bool {
for _, prefix := range prefixes {
if strings.HasPrefix(name, prefix) {
return true
}
}
return false
}
// IsEntry returns true if name equals to any string in given slice.
func IsEntry(name string, entries []string) bool {
for _, e := range entries {
if e == name {
return true
}
}
return false
}
// IsFilter returns true if given name matches any of global filter rule.
func IsFilter(name string) bool {
if strings.Contains(name, ".DS_Store") {
return true
}
return false
}
// IsExist returns true if given path is a file or directory.
func IsExist(path string) bool {
_, err := os.Stat(path)
return err == nil || os.IsExist(err)
}
// Copy copies file from source to target path.
func Copy(dest, src 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())
}

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// Copyright 2013 Unknown
//
// 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 zip
import (
"archive/zip"
"os"
"strings"
)
// OpenFile is the generalized open call; most users will use Open
// instead. It opens the named zip file with specified flag
// (O_RDONLY etc.) if applicable. If successful,
// methods on the returned ZipArchive can be used for I/O.
// If there is an error, it will be of type *PathError.
func (z *ZipArchive) Open(name string, flag int, perm os.FileMode) error {
// Create a new archive if it's specified and not exist.
if flag&os.O_CREATE != 0 {
f, err := os.Create(name)
if err != nil {
return err
}
zw := zip.NewWriter(f)
if err = zw.Close(); err != nil {
return err
}
}
rc, err := zip.OpenReader(name)
if err != nil {
return err
}
z.ReadCloser = rc
z.FileName = name
z.Comment = rc.Comment
z.NumFiles = len(rc.File)
z.Flag = flag
z.Permission = perm
z.isHasChanged = false
z.files = make([]*File, z.NumFiles)
for i, f := range rc.File {
z.files[i] = &File{}
z.files[i].FileHeader, err = zip.FileInfoHeader(f.FileInfo())
if err != nil {
return err
}
z.files[i].Name = strings.Replace(f.Name, "\\", "/", -1)
if f.FileInfo().IsDir() && !strings.HasSuffix(z.files[i].Name, "/") {
z.files[i].Name += "/"
}
}
return nil
}

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// Copyright 2014 Unknown
//
// 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 zip
import (
"archive/zip"
"io"
"os"
"path/filepath"
)
// A StreamArchive represents a streamable archive.
type StreamArchive struct {
*zip.Writer
}
// NewStreamArachive returns a new streamable archive with given io.Writer.
// It's caller's responsibility to close io.Writer and streamer after operation.
func NewStreamArachive(w io.Writer) *StreamArchive {
return &StreamArchive{zip.NewWriter(w)}
}
// StreamFile streams a file or directory entry into StreamArchive.
func (s *StreamArchive) StreamFile(relPath string, fi os.FileInfo, data []byte) error {
if fi.IsDir() {
fh, err := zip.FileInfoHeader(fi)
if err != nil {
return err
}
fh.Name = relPath + "/"
if _, err = s.Writer.CreateHeader(fh); err != nil {
return err
}
} else {
fh, err := zip.FileInfoHeader(fi)
if err != nil {
return err
}
fh.Name = filepath.Join(relPath, fi.Name())
fh.Method = zip.Deflate
fw, err := s.Writer.CreateHeader(fh)
if err != nil {
return err
} else if _, err = fw.Write(data); err != nil {
return err
}
}
return nil
}
// StreamReader streams data from io.Reader to StreamArchive.
func (s *StreamArchive) StreamReader(relPath string, fi os.FileInfo, r io.Reader) (err error) {
fh, err := zip.FileInfoHeader(fi)
if err != nil {
return err
}
fh.Name = filepath.Join(relPath, fi.Name())
fw, err := s.Writer.CreateHeader(fh)
if err != nil {
return err
}
_, err = io.Copy(fw, r)
return err
}

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// Copyright 2013 Unknown
//
// 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 zip
import (
"archive/zip"
"fmt"
"io"
"os"
"path"
"path/filepath"
"strings"
"github.com/Unknwon/cae"
)
// Switcher of printing trace information when pack and extract.
var Verbose = true
// extractFile extracts zip.File to file system.
func extractFile(f *zip.File, destPath string) error {
filePath := path.Join(destPath, f.Name)
os.MkdirAll(path.Dir(filePath), os.ModePerm)
rc, err := f.Open()
if err != nil {
return err
}
defer rc.Close()
fw, err := os.Create(filePath)
if err != nil {
return err
}
defer fw.Close()
if _, err = io.Copy(fw, rc); err != nil {
return err
}
// Skip symbolic links.
if f.FileInfo().Mode()&os.ModeSymlink != 0 {
return nil
}
// Set back file information.
if err = os.Chtimes(filePath, f.ModTime(), f.ModTime()); err != nil {
return err
}
return os.Chmod(filePath, f.FileInfo().Mode())
}
var defaultExtractFunc = func(fullName string, fi os.FileInfo) error {
if !Verbose {
return nil
}
fmt.Println("Extracting file..." + fullName)
return nil
}
// ExtractToFunc extracts the whole archive or the given files to the
// specified destination.
// It accepts a function as a middleware for custom operations.
func (z *ZipArchive) ExtractToFunc(destPath string, fn cae.HookFunc, entries ...string) (err error) {
destPath = strings.Replace(destPath, "\\", "/", -1)
isHasEntry := len(entries) > 0
if Verbose {
fmt.Println("Unzipping " + z.FileName + "...")
}
os.MkdirAll(destPath, os.ModePerm)
for _, f := range z.File {
f.Name = strings.Replace(f.Name, "\\", "/", -1)
// Directory.
if strings.HasSuffix(f.Name, "/") {
if isHasEntry {
if cae.IsEntry(f.Name, entries) {
if err = fn(f.Name, f.FileInfo()); err != nil {
continue
}
os.MkdirAll(path.Join(destPath, f.Name), os.ModePerm)
}
continue
}
if err = fn(f.Name, f.FileInfo()); err != nil {
continue
}
os.MkdirAll(path.Join(destPath, f.Name), os.ModePerm)
continue
}
// File.
if isHasEntry {
if cae.IsEntry(f.Name, entries) {
if err = fn(f.Name, f.FileInfo()); err != nil {
continue
}
err = extractFile(f, destPath)
}
} else {
if err = fn(f.Name, f.FileInfo()); err != nil {
continue
}
err = extractFile(f, destPath)
}
if err != nil {
return err
}
}
return nil
}
// ExtractToFunc extracts the whole archive or the given files to the
// specified destination.
// It accepts a function as a middleware for custom operations.
func ExtractToFunc(srcPath, destPath string, fn cae.HookFunc, entries ...string) (err error) {
z, err := Open(srcPath)
if err != nil {
return err
}
defer z.Close()
return z.ExtractToFunc(destPath, fn, entries...)
}
// ExtractTo extracts the whole archive or the given files to the
// specified destination.
// Call Flush() to apply changes before this.
func (z *ZipArchive) ExtractTo(destPath string, entries ...string) (err error) {
return z.ExtractToFunc(destPath, defaultExtractFunc, entries...)
}
// ExtractTo extracts given archive or the given files to the
// specified destination.
func ExtractTo(srcPath, destPath string, entries ...string) (err error) {
return ExtractToFunc(srcPath, destPath, defaultExtractFunc, entries...)
}
// extractFile extracts file from ZipArchive to file system.
func (z *ZipArchive) extractFile(f *File) error {
if !z.isHasWriter {
for _, zf := range z.ReadCloser.File {
if f.Name == zf.Name {
return extractFile(zf, path.Dir(f.tmpPath))
}
}
}
return cae.Copy(f.tmpPath, f.absPath)
}
// Flush saves changes to original zip file if any.
func (z *ZipArchive) Flush() error {
if !z.isHasChanged || (z.ReadCloser == nil && !z.isHasWriter) {
return nil
}
// Extract to tmp path and pack back.
tmpPath := path.Join(os.TempDir(), "cae", path.Base(z.FileName))
os.RemoveAll(tmpPath)
defer os.RemoveAll(tmpPath)
for _, f := range z.files {
if strings.HasSuffix(f.Name, "/") {
os.MkdirAll(path.Join(tmpPath, f.Name), os.ModePerm)
continue
}
// Relative path inside zip temporary changed.
f.tmpPath = path.Join(tmpPath, f.Name)
if err := z.extractFile(f); err != nil {
return err
}
}
if z.isHasWriter {
return packToWriter(tmpPath, z.writer, defaultPackFunc, true)
}
if err := PackTo(tmpPath, z.FileName); err != nil {
return err
}
return z.Open(z.FileName, os.O_RDWR|os.O_TRUNC, z.Permission)
}
// packFile packs a file or directory to zip.Writer.
func packFile(srcFile string, recPath string, zw *zip.Writer, fi os.FileInfo) error {
if fi.IsDir() {
fh, err := zip.FileInfoHeader(fi)
if err != nil {
return err
}
fh.Name = recPath + "/"
if _, err = zw.CreateHeader(fh); err != nil {
return err
}
} else {
fh, err := zip.FileInfoHeader(fi)
if err != nil {
return err
}
fh.Name = recPath
fh.Method = zip.Deflate
fw, err := zw.CreateHeader(fh)
if err != nil {
return err
}
if fi.Mode()&os.ModeSymlink != 0 {
target, err := os.Readlink(srcFile)
if err != nil {
return err
}
if _, err = fw.Write([]byte(target)); err != nil {
return err
}
} else {
f, err := os.Open(srcFile)
if err != nil {
return err
}
defer f.Close()
if _, err = io.Copy(fw, f); err != nil {
return err
}
}
}
return nil
}
// packDir packs a directory and its subdirectories and files
// recursively to zip.Writer.
func packDir(srcPath string, recPath string, zw *zip.Writer, fn cae.HookFunc) error {
dir, err := os.Open(srcPath)
if err != nil {
return err
}
defer dir.Close()
fis, err := dir.Readdir(0)
if err != nil {
return err
}
for _, fi := range fis {
if cae.IsFilter(fi.Name()) {
continue
}
curPath := srcPath + "/" + fi.Name()
tmpRecPath := filepath.Join(recPath, fi.Name())
if err = fn(curPath, fi); err != nil {
continue
}
if fi.IsDir() {
if err = packFile(srcPath, tmpRecPath, zw, fi); err != nil {
return err
}
err = packDir(curPath, tmpRecPath, zw, fn)
} else {
err = packFile(curPath, tmpRecPath, zw, fi)
}
if err != nil {
return err
}
}
return nil
}
// packToWriter packs given path object to io.Writer.
func packToWriter(srcPath string, w io.Writer, fn func(fullName string, fi os.FileInfo) error, includeDir bool) error {
zw := zip.NewWriter(w)
defer zw.Close()
f, err := os.Open(srcPath)
if err != nil {
return err
}
defer f.Close()
fi, err := f.Stat()
if err != nil {
return err
}
basePath := path.Base(srcPath)
if fi.IsDir() {
if includeDir {
if err = packFile(srcPath, basePath, zw, fi); err != nil {
return err
}
} else {
basePath = ""
}
return packDir(srcPath, basePath, zw, fn)
}
return packFile(srcPath, basePath, zw, fi)
}
// packTo packs given source path object to target path.
func packTo(srcPath, destPath string, fn cae.HookFunc, includeDir bool) error {
fw, err := os.Create(destPath)
if err != nil {
return err
}
defer fw.Close()
return packToWriter(srcPath, fw, fn, includeDir)
}
// PackToFunc packs the complete archive to the specified destination.
// It accepts a function as a middleware for custom operations.
func PackToFunc(srcPath, destPath string, fn func(fullName string, fi os.FileInfo) error, includeDir ...bool) error {
isIncludeDir := false
if len(includeDir) > 0 && includeDir[0] {
isIncludeDir = true
}
return packTo(srcPath, destPath, fn, isIncludeDir)
}
var defaultPackFunc = func(fullName string, fi os.FileInfo) error {
if !Verbose {
return nil
}
if fi.IsDir() {
fmt.Printf("Adding dir...%s\n", fullName)
} else {
fmt.Printf("Adding file...%s\n", fullName)
}
return nil
}
// PackTo packs the whole archive to the specified destination.
// Call Flush() will automatically call this in the end.
func PackTo(srcPath, destPath string, includeDir ...bool) error {
return PackToFunc(srcPath, destPath, defaultPackFunc, includeDir...)
}
// Close opens or creates archive and save changes.
func (z *ZipArchive) Close() (err error) {
if err = z.Flush(); err != nil {
return err
}
if z.ReadCloser != nil {
if err = z.ReadCloser.Close(); err != nil {
return err
}
z.ReadCloser = nil
}
return nil
}

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vendor/github.com/Unknwon/cae/zip/zip.go generated vendored Normal file
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@ -0,0 +1,238 @@
// Copyright 2013 Unknown
//
// 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 zip enables you to transparently read or write ZIP compressed archives and the files inside them.
package zip
import (
"archive/zip"
"errors"
"io"
"os"
"path"
"strings"
"github.com/Unknwon/cae"
)
// A File represents a file or directory entry in archive.
type File struct {
*zip.FileHeader
oldName string // NOTE: unused, for future change name feature.
oldComment string // NOTE: unused, for future change comment feature.
absPath string // Absolute path of local file system.
tmpPath string
}
// A ZipArchive represents a file archive, compressed with Zip.
type ZipArchive struct {
*zip.ReadCloser
FileName string
Comment string
NumFiles int
Flag int
Permission os.FileMode
files []*File
isHasChanged bool
// For supporting flushing to io.Writer.
writer io.Writer
isHasWriter bool
}
// OpenFile is the generalized open call; most users will use Open
// instead. It opens the named zip file with specified flag
// (O_RDONLY etc.) if applicable. If successful,
// methods on the returned ZipArchive can be used for I/O.
// If there is an error, it will be of type *PathError.
func OpenFile(name string, flag int, perm os.FileMode) (*ZipArchive, error) {
z := new(ZipArchive)
err := z.Open(name, flag, perm)
return z, err
}
// Create creates the named zip file, truncating
// it if it already exists. If successful, methods on the returned
// ZipArchive can be used for I/O; the associated file descriptor has mode
// O_RDWR.
// If there is an error, it will be of type *PathError.
func Create(name string) (*ZipArchive, error) {
os.MkdirAll(path.Dir(name), os.ModePerm)
return OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
}
// Open opens the named zip file for reading. If successful, methods on
// the returned ZipArchive can be used for reading; the associated file
// descriptor has mode O_RDONLY.
// If there is an error, it will be of type *PathError.
func Open(name string) (*ZipArchive, error) {
return OpenFile(name, os.O_RDONLY, 0)
}
// New accepts a variable that implemented interface io.Writer
// for write-only purpose operations.
func New(w io.Writer) *ZipArchive {
return &ZipArchive{
writer: w,
isHasWriter: true,
}
}
// List returns a string slice of files' name in ZipArchive.
// Specify prefixes will be used as filters.
func (z *ZipArchive) List(prefixes ...string) []string {
isHasPrefix := len(prefixes) > 0
names := make([]string, 0, z.NumFiles)
for _, f := range z.files {
if isHasPrefix && !cae.HasPrefix(f.Name, prefixes) {
continue
}
names = append(names, f.Name)
}
return names
}
// AddEmptyDir adds a raw directory entry to ZipArchive,
// it returns false if same directory enry already existed.
func (z *ZipArchive) AddEmptyDir(dirPath string) bool {
dirPath = strings.Replace(dirPath, "\\", "/", -1)
if !strings.HasSuffix(dirPath, "/") {
dirPath += "/"
}
for _, f := range z.files {
if dirPath == f.Name {
return false
}
}
dirPath = strings.TrimSuffix(dirPath, "/")
if strings.Contains(dirPath, "/") {
// Auto add all upper level directories.
z.AddEmptyDir(path.Dir(dirPath))
}
z.files = append(z.files, &File{
FileHeader: &zip.FileHeader{
Name: dirPath + "/",
UncompressedSize: 0,
},
})
z.updateStat()
return true
}
// AddDir adds a directory and subdirectories entries to ZipArchive.
func (z *ZipArchive) AddDir(dirPath, absPath string) error {
dir, err := os.Open(absPath)
if err != nil {
return err
}
defer dir.Close()
// Make sure we have all upper level directories.
z.AddEmptyDir(dirPath)
fis, err := dir.Readdir(0)
if err != nil {
return err
}
for _, fi := range fis {
curPath := absPath + "/" + fi.Name()
tmpRecPath := path.Join(dirPath, fi.Name())
if fi.IsDir() {
if err = z.AddDir(tmpRecPath, curPath); err != nil {
return err
}
} else {
if err = z.AddFile(tmpRecPath, curPath); err != nil {
return err
}
}
}
return nil
}
// updateStat should be called after every change for rebuilding statistic.
func (z *ZipArchive) updateStat() {
z.NumFiles = len(z.files)
z.isHasChanged = true
}
// AddFile adds a file entry to ZipArchive.
func (z *ZipArchive) AddFile(fileName, absPath string) error {
fileName = strings.Replace(fileName, "\\", "/", -1)
absPath = strings.Replace(absPath, "\\", "/", -1)
if cae.IsFilter(absPath) {
return nil
}
f, err := os.Open(absPath)
if err != nil {
return err
}
defer f.Close()
fi, err := f.Stat()
if err != nil {
return err
}
file := new(File)
file.FileHeader, err = zip.FileInfoHeader(fi)
if err != nil {
return err
}
file.Name = fileName
file.absPath = absPath
z.AddEmptyDir(path.Dir(fileName))
isExist := false
for _, f := range z.files {
if fileName == f.Name {
f = file
isExist = true
break
}
}
if !isExist {
z.files = append(z.files, file)
}
z.updateStat()
return nil
}
// DeleteIndex deletes an entry in the archive by its index.
func (z *ZipArchive) DeleteIndex(idx int) error {
if idx >= z.NumFiles {
return errors.New("index out of range of number of files")
}
z.files = append(z.files[:idx], z.files[idx+1:]...)
return nil
}
// DeleteName deletes an entry in the archive by its name.
func (z *ZipArchive) DeleteName(name string) error {
for i, f := range z.files {
if f.Name == name {
return z.DeleteIndex(i)
}
}
return errors.New("entry with given name not found")
}