func (container *Container) Copy(resource string) (io.ReadCloser, error) {
if err := container.Mount(); err != nil {
return nil, err
}
var filter []string
basePath, err := container.getResourcePath(resource)
if err != nil {
container.Unmount()
return nil, err
}
stat, err := os.Stat(basePath)
if err != nil {
container.Unmount()
return nil, err
}
if !stat.IsDir() {
d, f := path.Split(basePath)
basePath = d
filter = []string{f}
} else {
filter = []string{path.Base(basePath)}
basePath = path.Dir(basePath)
}
archive, err := archive.TarWithOptions(basePath, &archive.TarOptions{
Compression: archive.Uncompressed,
Includes: filter,
})
if err != nil {
container.Unmount()
return nil, err
}
return utils.NewReadCloserWrapper(archive, func() error {
err := archive.Close()
container.Unmount()
return err
}),
nil
}
func Pack(repo, dir, branch string) (hash string, err error) {
db, err := libpack.Init(repo, branch)
if err != nil {
return "", err
}
a, err := archive.TarWithOptions(dir, &archive.TarOptions{Excludes: []string{".git"}})
if err != nil {
return "", err
}
if err := db.SetTar(a); err != nil {
return "", err
}
if err := db.Commit("imported tar filesystem tree"); err != nil {
return "", err
}
head := db.Head()
if head != nil {
hash = head.String()
}
return
}
// Returns an archive of the contents for the id
func (a *Driver) Diff(id string) (archive.Archive, error) {
return archive.TarWithOptions(path.Join(a.rootPath(), "diff", id), &archive.TarOptions{
Compression: archive.Uncompressed,
})
}
// Diff produces an archive of the changes between the specified
// layer and its parent layer which may be "".
func (a *Driver) Diff(id, parent string) (archive.Archive, error) {
// AUFS doesn't need the parent layer to produce a diff.
return archive.TarWithOptions(path.Join(a.rootPath(), "diff", id), &archive.TarOptions{
Compression: archive.Uncompressed,
})
}