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zip_create.go
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zip_create.go
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package archives
import (
"archive/zip"
"io"
"io/ioutil"
"os"
"path/filepath"
"github.com/Sirupsen/logrus"
)
func createZipDirectoryEntry(archive *zip.Writer, fh *zip.FileHeader) error {
fh.Name += "/"
_, err := archive.CreateHeader(fh)
return err
}
func createZipSymlinkEntry(archive *zip.Writer, fh *zip.FileHeader) error {
fw, err := archive.CreateHeader(fh)
if err != nil {
return err
}
link, err := os.Readlink(fh.Name)
if err != nil {
return err
}
_, err = io.WriteString(fw, link)
return err
}
func createZipFileEntry(archive *zip.Writer, fh *zip.FileHeader) error {
fh.Method = zip.Deflate
fw, err := archive.CreateHeader(fh)
if err != nil {
return err
}
file, err := os.Open(fh.Name)
if err != nil {
return err
}
_, err = io.Copy(fw, file)
file.Close()
if err != nil {
return err
}
return nil
}
func createZipEntry(archive *zip.Writer, fileName string) error {
fi, err := os.Lstat(fileName)
if err != nil {
logrus.Warningln("File ignored:", err)
return nil
}
fh, err := zip.FileInfoHeader(fi)
if err != nil {
return err
}
fh.Name = fileName
fh.Extra = createZipExtra(fi)
switch fi.Mode() & os.ModeType {
case os.ModeDir:
return createZipDirectoryEntry(archive, fh)
case os.ModeSymlink:
return createZipSymlinkEntry(archive, fh)
case os.ModeNamedPipe, os.ModeSocket, os.ModeDevice:
// Ignore the files that of these types
logrus.Warningln("File ignored:", fileName)
return nil
default:
return createZipFileEntry(archive, fh)
}
}
func CreateZipArchive(w io.Writer, fileNames []string) error {
archive := zip.NewWriter(w)
defer archive.Close()
for _, fileName := range fileNames {
err := createZipEntry(archive, fileName)
if err != nil {
return err
}
}
return nil
}
func CreateZipFile(fileName string, fileNames []string) error {
// create directories to store archive
os.MkdirAll(filepath.Dir(fileName), 0700)
tempFile, err := ioutil.TempFile(filepath.Dir(fileName), "archive_")
if err != nil {
return err
}
defer tempFile.Close()
defer os.Remove(tempFile.Name())
logrus.Debugln("Temporary file:", tempFile.Name())
err = CreateZipArchive(tempFile, fileNames)
if err != nil {
return err
}
tempFile.Close()
err = os.Rename(tempFile.Name(), fileName)
if err != nil {
return err
}
return nil
}