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package archive
import (
"archive/tar"
"os"
"path/filepath"
"strings"
)
// longPathPrefix is the longpath prefix for Windows file paths.
const longPathPrefix = `\\?\`
// addLongPathPrefix adds the Windows long path prefix to the path provided if
// it does not already have it. It is a no-op on platforms other than Windows.
//
// addLongPathPrefix is a copy of [github.com/docker/docker/pkg/longpath.AddPrefix].
func addLongPathPrefix(srcPath string) string {
if strings.HasPrefix(srcPath, longPathPrefix) {
return srcPath
}
if strings.HasPrefix(srcPath, `\\`) {
// This is a UNC path, so we need to add 'UNC' to the path as well.
return longPathPrefix + `UNC` + srcPath[1:]
}
return longPathPrefix + srcPath
}
// getWalkRoot calculates the root path when performing a TarWithOptions.
// We use a separate function as this is platform specific.
func getWalkRoot(srcPath string, include string) string {
return filepath.Join(srcPath, include)
}
// chmodTarEntry is used to adjust the file permissions used in tar header based
// on the platform the archival is done.
func chmodTarEntry(perm os.FileMode) os.FileMode {
// Remove group- and world-writable bits.
perm &= 0o755
// Add the x bit: make everything +x on Windows
return perm | 0o111
}
func getInodeFromStat(stat interface{}) (uint64, error) {
// do nothing. no notion of Inode in stat on Windows
return 0, nil
}
// handleTarTypeBlockCharFifo is an OS-specific helper function used by
// createTarFile to handle the following types of header: Block; Char; Fifo
func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
return nil
}
func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
return nil
}
func getFileUIDGID(stat interface{}) (int, int, error) {
// no notion of file ownership mapping yet on Windows
return 0, 0, nil
}
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