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Nick Thomas authored
Operations like lchown() and chmod() are called once for each entry in a ZIP archive. If the operation fails for the first entry, it's very likely to fail for every one in the archive. The errors are non-fatal, but lead to annoying build log spam. This commit changes the output so failure messages are only shown the first time an operation files.
dd82018b
zip_extract.go 2.45 KiB
package archives
import (
"archive/zip"
"io"
"io/ioutil"
"os"
"path/filepath"
"github.com/Sirupsen/logrus"
)
func extractZipDirectoryEntry(file *zip.File) (err error) {
err = os.Mkdir(file.Name, file.Mode().Perm())
// The error that directory does exists is not a error for us
if os.IsExist(err) {
err = nil
}
return
}
func extractZipSymlinkEntry(file *zip.File) (err error) {
var data []byte
in, err := file.Open()
if err != nil {
return err
}
defer in.Close()
data, err = ioutil.ReadAll(in)
if err != nil {
return err
}
// Remove symlink before creating a new one, otherwise we can error that file does exist
os.Remove(file.Name)
err = os.Symlink(string(data), file.Name)
return
}
func extractZipFileEntry(file *zip.File) (err error) {
var out *os.File
in, err := file.Open()
if err != nil {
return err
}
defer in.Close()
// Remove file before creating a new one, otherwise we can error that file does exist
os.Remove(file.Name)
out, err = os.OpenFile(file.Name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, file.Mode().Perm())
if err != nil {
return err
}
defer out.Close()
_, err = io.Copy(out, in)
return
}
func extractZipFile(file *zip.File) (err error) {
// Create all parents to extract the file
os.MkdirAll(filepath.Dir(file.Name), 0777)
switch file.Mode() & os.ModeType {
case os.ModeDir:
err = extractZipDirectoryEntry(file)
case os.ModeSymlink:
err = extractZipSymlinkEntry(file)
case os.ModeNamedPipe, os.ModeSocket, os.ModeDevice:
// Ignore the files that of these types
logrus.Warningln("File ignored: %q", file.Name)
default:
err = extractZipFileEntry(file)
}
return
}
func ExtractZipArchive(archive *zip.Reader) error {
tracker := newPathErrorTracker()
for _, file := range archive.File {
if err := extractZipFile(file); tracker.actionable(err) {
logrus.Warningf("%s: %s (suppressing repeats)", file.Name, err)
}
}
for _, file := range archive.File {
// Update file permissions
if err := os.Chmod(file.Name, file.Mode().Perm()); tracker.actionable(err) {
logrus.Warningf("%s: %s (suppressing repeats)", file.Name, err)
}
// Process zip metadata
if err := processZipExtra(&file.FileHeader); tracker.actionable(err) {
logrus.Warningf("%s: %s (suppressing repeats)", file.Name, err)
}
}
return nil
}
func ExtractZipFile(fileName string) error {
archive, err := zip.OpenReader(fileName)
if err != nil {
return err
}
defer archive.Close()
return ExtractZipArchive(&archive.Reader)
}