Golang lfs.ScanTree函數代碼示例

func lsFilesCommand(cmd *cobra.Command, args []string) {
	requireInRepo()

	var ref string
	var err error

	if len(args) == 1 {
		ref = args[0]
	} else {
		fullref, err := git.CurrentRef()
		if err != nil {
			Exit(err.Error())
		}
		ref = fullref.Sha
	}

	showOidLen := 10
	if longOIDs {
		showOidLen = 64
	}

	files, err := lfs.ScanTree(ref)
	if err != nil {
		Panic(err, "Could not scan for Git LFS tree: %s", err)
	}

	for _, p := range files {
		Print("%s %s %s", p.Oid[0:showOidLen], lsFilesMarker(p), p.Name)
	}
}

func checkoutWithIncludeExclude(include []string, exclude []string) {
	ref, err := git.CurrentRef()
	if err != nil {
		Panic(err, "Could not checkout")
	}

	pointers, err := lfs.ScanTree(ref)
	if err != nil {
		Panic(err, "Could not scan for Git LFS files")
	}

	var wait sync.WaitGroup
	wait.Add(1)

	c := make(chan *lfs.WrappedPointer)

	go func() {
		checkoutWithChan(c)
		wait.Done()
	}()
	for _, pointer := range pointers {
		if lfs.FilenamePassesIncludeExcludeFilter(pointer.Name, include, exclude) {
			c <- pointer
		}

	}
	close(c)
	wait.Wait()

}

func pointersToFetchForRef(ref string) ([]*lfs.WrappedPointer, error) {
	// Use SkipDeletedBlobs to avoid fetching ALL previous versions of modified files
	opts := lfs.NewScanRefsOptions()
	opts.ScanMode = lfs.ScanRefsMode
	opts.SkipDeletedBlobs = true
	return lfs.ScanTree(ref)
}

func checkoutWithIncludeExclude(include []string, exclude []string) {
	ref, err := git.CurrentRef()
	if err != nil {
		Panic(err, "Could not checkout")
	}

	pointers, err := lfs.ScanTree(ref.Sha)
	if err != nil {
		Panic(err, "Could not scan for Git LFS files")
	}

	var wait sync.WaitGroup
	wait.Add(1)

	c := make(chan *lfs.WrappedPointer, 1)

	go func() {
		checkoutWithChan(c)
		wait.Done()
	}()

	// Count bytes for progress
	var totalBytes int64
	for _, pointer := range pointers {
		totalBytes += pointer.Size
	}

	logPath, _ := cfg.Os.Get("GIT_LFS_PROGRESS")
	progress := progress.NewProgressMeter(len(pointers), totalBytes, false, logPath)
	progress.Start()
	totalBytes = 0
	for _, pointer := range pointers {
		totalBytes += pointer.Size
		if lfs.FilenamePassesIncludeExcludeFilter(pointer.Name, include, exclude) {
			progress.Add(pointer.Name)
			c <- pointer
			// not strictly correct (parallel) but we don't have a callback & it's just local
			// plus only 1 slot in channel so it'll block & be close
			progress.TransferBytes("checkout", pointer.Name, pointer.Size, totalBytes, int(pointer.Size))
			progress.FinishTransfer(pointer.Name)
		} else {
			progress.Skip(pointer.Size)
		}
	}
	close(c)
	wait.Wait()
	progress.Finish()

}

func checkoutFromFetchChan(include []string, exclude []string, in chan *lfs.WrappedPointer) {
	ref, err := git.CurrentRef()
	if err != nil {
		Panic(err, "Could not checkout")
	}
	// Need to ScanTree to identify multiple files with the same content (fetch will only report oids once)
	pointers, err := lfs.ScanTree(ref.Sha)
	if err != nil {
		Panic(err, "Could not scan for Git LFS files")
	}

	// Map oid to multiple pointers
	mapping := make(map[string][]*lfs.WrappedPointer)
	for _, pointer := range pointers {
		if lfs.FilenamePassesIncludeExcludeFilter(pointer.Name, include, exclude) {
			mapping[pointer.Oid] = append(mapping[pointer.Oid], pointer)
		}
	}

	// Launch git update-index
	c := make(chan *lfs.WrappedPointer)

	var wait sync.WaitGroup
	wait.Add(1)

	go func() {
		checkoutWithChan(c)
		wait.Done()
	}()

	// Feed it from in, which comes from fetch
	for p := range in {
		// Add all of the files for this oid
		for _, fp := range mapping[p.Oid] {
			c <- fp
		}
	}
	close(c)
	wait.Wait()
}