/
zip_path.go
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/
zip_path.go
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// Copyright 2018 Bull S.A.S. Atos Technologies - Bull, Rue Jean Jaures, B.P.68, 78340, Les Clayes-sous-Bois, France.
//
// 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 ziputil
import (
"archive/zip"
"bytes"
"io"
"io/ioutil"
"os"
"path/filepath"
)
// ZipPath zips a file or directory and return the zipped content as a byte array.
//
// path could be either relative or absolute.
func ZipPath(path string) ([]byte, error) {
absPath, err := filepath.Abs(path)
if err != nil {
return []byte{}, err
}
absPath, err = filepath.EvalSymlinks(absPath)
if err != nil {
return []byte{}, err
}
// Create a buffer to write our archive to.
buf := new(bytes.Buffer)
// Create a new zip archive.
w := zip.NewWriter(buf)
fileInfo, err := os.Stat(absPath)
if err != nil {
return []byte{}, err
}
if fileInfo.IsDir() {
err = zipDirContent(w, "", absPath)
if err != nil {
return []byte{}, err
}
} else {
fileName := fileInfo.Name()
var header *zip.FileHeader
header, err = zip.FileInfoHeader(fileInfo)
if err != nil {
return []byte{}, err
}
header.Name = fileName
// Get a writer in the archive based on our header
var writer io.Writer
writer, err = w.CreateHeader(header)
if err != nil {
return []byte{}, err
}
var file *os.File
file, err = os.Open(absPath)
if err != nil {
return []byte{}, err
}
if _, err = io.Copy(writer, file); err != nil {
return []byte{}, err
}
}
// Make sure to check the error on Close.
err = w.Close()
if err != nil {
return []byte{}, err
}
return buf.Bytes(), nil
}
// zipDirContent zips files and directories recursively.
//
// If not empty, rootEntry must end with a forward slash '/'
func zipDirContent(w *zip.Writer, rootEntry, dirPath string) error {
//tb.Logf("Analyzing %q rootEntry %q", dirPath, rootEntry)
fileInfos, err := ioutil.ReadDir(dirPath)
if err != nil {
return err
}
for _, fileInfo := range fileInfos {
absPath, err := filepath.Abs(filepath.Join(dirPath, fileInfo.Name()))
if err != nil {
return err
}
absPath, err = filepath.EvalSymlinks(absPath)
if err != nil {
return err
}
fileName := rootEntry + fileInfo.Name()
fileInfo, err = os.Stat(absPath)
if err != nil {
return err
}
// Create a header based off of the fileinfo
header, err := zip.FileInfoHeader(fileInfo)
if err != nil {
return err
}
// If it's a file, set the compression method to deflate (leave directories uncompressed)
if !fileInfo.IsDir() {
header.Method = zip.Deflate
}
header.Name = fileName
// Add a trailing slash if the entry is a directory
if fileInfo.IsDir() {
header.Name += "/"
}
// Get a writer in the archive based on our header
writer, err := w.CreateHeader(header)
if err != nil {
return err
}
if !fileInfo.IsDir() {
file, err := os.Open(absPath)
if err != nil {
return err
}
if _, err := io.Copy(writer, file); err != nil {
return err
}
} else {
if err := zipDirContent(w, fileName+"/", absPath); err != nil {
return err
}
}
}
return nil
}