示例#1
0
func (s *Snap) Install(targetPath, mountDir string) error {

	// ensure mount-point and blob target dir.
	for _, dir := range []string{mountDir, filepath.Dir(targetPath)} {
		if err := os.MkdirAll(dir, 0755); err != nil {
			return err
		}
	}

	// This is required so that the tests can simulate a mounted
	// snap when we "install" a squashfs snap in the tests.
	// We can not mount it for real in the tests, so we just unpack
	// it to the location which is good enough for the tests.
	if os.Getenv("SNAPPY_SQUASHFS_UNPACK_FOR_TESTS") != "" {
		if err := s.Unpack("*", mountDir); err != nil {
			return err
		}
	}

	// nothing to do, happens on e.g. first-boot when we already
	// booted with the OS snap but its also in the seed.yaml
	if s.path == targetPath || osutil.FilesAreEqual(s.path, targetPath) {
		return nil
	}

	// FIXME: cp.CopyFile() has no preserve attribute flag yet
	return runCommand("cp", "-a", s.path, targetPath)
}
示例#2
0
文件: squashfs.go 项目: elopio/snappy
func (s *Snap) Install(targetPath, mountDir string) error {

	// ensure mount-point and blob target dir.
	for _, dir := range []string{mountDir, filepath.Dir(targetPath)} {
		if err := os.MkdirAll(dir, 0755); err != nil {
			return err
		}
	}

	// This is required so that the tests can simulate a mounted
	// snap when we "install" a squashfs snap in the tests.
	// We can not mount it for real in the tests, so we just unpack
	// it to the location which is good enough for the tests.
	if os.Getenv("SNAPPY_SQUASHFS_UNPACK_FOR_TESTS") != "" {
		if err := s.Unpack("*", mountDir); err != nil {
			return err
		}
	}

	// nothing to do, happens on e.g. first-boot when we already
	// booted with the OS snap but its also in the seed.yaml
	if s.path == targetPath || osutil.FilesAreEqual(s.path, targetPath) {
		return nil
	}

	// try to (hard)link the file, but go on to trying to copy it
	// if it fails for whatever reason
	//
	// link(2) returns EPERM on filesystems that don't support
	// hard links (like vfat), so checking the error here doesn't
	// make sense vs just trying to copy it.
	if err := os.Link(s.path, targetPath); err == nil {
		return nil
	}

	return osutil.CopyFile(s.path, targetPath, osutil.CopyFlagPreserveAll|osutil.CopyFlagSync)
}