INNER CODE UNIT · Go

archiveHeaderSize

genuinetools/img · build.go:417

	archiveHeaderSize := 512 // number of bytes in an archive header
	magic, err := buf.Peek(archiveHeaderSize)
	if err != nil && err != io.EOF {
		return tmpDir, fmt.Errorf("failed to peek context header from STDIN: %v", err)
	}

	// Validate if it is a tar archive.
	if isArchive(magic) {
		return tmpDir, untar(tmpDir, buf)
	}

	if dockerfileName == "-" {
		return tmpDir, errors.New("build context is not an archive")
	}

	// Create the dockerfile in the temporary directory.
	dockerfilePath, err := securejoin.SecureJoin(tmpDir, dockerfileName)
	if err != nil {

View source record →