Golang lfs.ScanRefs函數代碼示例

// Fetch all binaries for a given ref (that we don't have already)
func fetchRef(ref string, include, exclude []string) {
	pointers, err := lfs.ScanRefs(ref, "", nil)
	if err != nil {
		Panic(err, "Could not scan for Git LFS files")
	}
	fetchPointers(pointers, include, exclude)
}

func uploadsBetweenRefs(left string, right string) *lfs.TransferQueue {
	// Just use scanner here
	pointers, err := lfs.ScanRefs(left, right, nil)
	if err != nil {
		Panic(err, "Error scanning for Git LFS files")
	}

	totalSize := int64(0)
	for _, p := range pointers {
		totalSize += p.Size
	}

	uploadQueue := lfs.NewUploadQueue(len(pointers), totalSize, pushDryRun)
	for i, pointer := range pointers {
		if pushDryRun {
			Print("push %s", pointer.Name)
			continue
		}

		tracerx.Printf("prepare upload: %s %s %d/%d", pointer.Oid, pointer.Name, i+1, len(pointers))

		u, wErr := lfs.NewUploadable(pointer.Oid, pointer.Name)
		if wErr != nil {
			if Debugging || wErr.Panic {
				Panic(wErr.Err, wErr.Error())
			} else {
				Exit(wErr.Error())
			}
		}
		uploadQueue.Add(u)
	}

	return uploadQueue
}

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.ScanRefs(ref, "", opts)
}

func uploadsBetweenRefAndRemote(ctx *uploadContext, refnames []string) {
	tracerx.Printf("Upload refs %v to remote %v", refnames, lfs.Config.CurrentRemote)

	scanOpt := lfs.NewScanRefsOptions()
	scanOpt.ScanMode = lfs.ScanLeftToRemoteMode
	scanOpt.RemoteName = lfs.Config.CurrentRemote

	if pushAll {
		scanOpt.ScanMode = lfs.ScanRefsMode
	}

	refs, err := refsByNames(refnames)
	if err != nil {
		Error(err.Error())
		Exit("Error getting local refs.")
	}

	for _, ref := range refs {
		pointers, err := lfs.ScanRefs(ref.Name, "", scanOpt)
		if err != nil {
			Panic(err, "Error scanning for Git LFS files in the %q ref", ref.Name)
		}

		upload(ctx, pointers)
	}
}

func uploadsBetweenRefs(left string, right string) *lfs.TransferQueue {
	tracerx.Printf("Upload between %v and %v", left, right)

	// Just use scanner here
	pointers, err := lfs.ScanRefs(left, right, nil)
	if err != nil {
		Panic(err, "Error scanning for Git LFS files")
	}
	return uploadPointers(pointers)
}

func fetchRefToChan(ref string, include, exclude []string) chan *lfs.WrappedPointer {
	c := make(chan *lfs.WrappedPointer)
	pointers, err := lfs.ScanRefs(ref, "", nil)
	if err != nil {
		Panic(err, "Could not scan for Git LFS files")
	}

	go fetchAndReportToChan(pointers, include, exclude, c)

	return c
}

func uploadsBetweenRefAndRemote(ref, remote string) *lfs.TransferQueue {

	tracerx.Printf("Upload between %v and remote %v", ref, remote)
	scanOpt := &lfs.ScanRefsOptions{ScanMode: lfs.ScanLeftToRemoteMode, RemoteName: remote}
	pointers, err := lfs.ScanRefs(ref, "", scanOpt)
	if err != nil {
		Panic(err, "Error scanning for Git LFS files")
	}
	return uploadPointers(pointers)

}

func uploadsBetweenRefs(ctx *uploadContext, left string, right string) {
	tracerx.Printf("Upload between %v and %v", left, right)

	scanOpt := lfs.NewScanRefsOptions()
	scanOpt.ScanMode = lfs.ScanRefsMode
	scanOpt.RemoteName = lfs.Config.CurrentRemote

	pointers, err := lfs.ScanRefs(left, right, scanOpt)
	if err != nil {
		Panic(err, "Error scanning for Git LFS files")
	}

	upload(ctx, pointers)
}

// prePushCommand is run through Git's pre-push hook. The pre-push hook passes
// two arguments on the command line:
//
//   1. Name of the remote to which the push is being done
//   2. URL to which the push is being done
//
// The hook receives commit information on stdin in the form:
//   <local ref> <local sha1> <remote ref> <remote sha1>
//
// In the typical case, prePushCommand will get a list of git objects being
// pushed by using the following:
//
//    git rev-list --objects <local sha1> ^<remote sha1>
//
// If any of those git objects are associated with Git LFS objects, those
// objects will be pushed to the Git LFS API.
//
// In the case of pushing a new branch, the list of git objects will be all of
// the git objects in this branch.
//
// In the case of deleting a branch, no attempts to push Git LFS objects will be
// made.
func prePushCommand(cmd *cobra.Command, args []string) {
	if len(args) == 0 {
		Print("This should be run through Git's pre-push hook.  Run `git lfs update` to install it.")
		os.Exit(1)
	}

	requireGitVersion()

	// Remote is first arg
	if err := git.ValidateRemote(args[0]); err != nil {
		Exit("Invalid remote name %q", args[0])
	}

	cfg.CurrentRemote = args[0]
	ctx := newUploadContext(prePushDryRun)

	scanOpt := lfs.NewScanRefsOptions()
	scanOpt.ScanMode = lfs.ScanLeftToRemoteMode
	scanOpt.RemoteName = cfg.CurrentRemote

	// We can be passed multiple lines of refs
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		line := strings.TrimSpace(scanner.Text())

		if len(line) == 0 {
			continue
		}

		left, right := decodeRefs(line)
		if left == prePushDeleteBranch {
			continue
		}

		pointers, err := lfs.ScanRefs(left, right, scanOpt)
		if err != nil {
			Panic(err, "Error scanning for Git LFS files")
		}

		upload(ctx, pointers)
	}
}

func uploadsBetweenRefAndRemote(remote string, refs []string) *lfs.TransferQueue {
	tracerx.Printf("Upload refs %v to remote %v", remote, refs)

	scanOpt := lfs.NewScanRefsOptions()
	scanOpt.ScanMode = lfs.ScanLeftToRemoteMode
	scanOpt.RemoteName = remote

	if pushAll {
		if len(refs) == 0 {
			pointers := scanAll()
			Print("Pushing objects...")
			return uploadPointers(pointers)
		} else {
			scanOpt.ScanMode = lfs.ScanRefsMode
		}
	}

	// keep a unique set of pointers
	oidPointerMap := make(map[string]*lfs.WrappedPointer)

	for _, ref := range refs {
		pointers, err := lfs.ScanRefs(ref, "", scanOpt)
		if err != nil {
			Panic(err, "Error scanning for Git LFS files in the %q ref", ref)
		}

		for _, p := range pointers {
			oidPointerMap[p.Oid] = p
		}
	}

	i := 0
	pointers := make([]*lfs.WrappedPointer, len(oidPointerMap))
	for _, pointer := range oidPointerMap {
		pointers[i] = pointer
		i += 1
	}

	return uploadPointers(pointers)
}

func lsFilesCommand(cmd *cobra.Command, args []string) {
	var ref string
	var err error

	if len(args) == 1 {
		ref = args[0]
	} else {
		ref, err = git.CurrentRef()
		if err != nil {
			Panic(err, "Could not ls-files")
		}
	}

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

	for _, p := range pointers {
		Print(p.Name)
	}
}

func lsFilesCommand(cmd *cobra.Command, args []string) {
	var ref string
	var err error

	if len(args) == 1 {
		ref = args[0]
	} else {
		fullref, err := git.CurrentRef()
		if err != nil {
			Panic(err, "Could not ls-files")
		}
		ref = fullref.Sha
	}

	scanOpt := &lfs.ScanRefsOptions{SkipDeletedBlobs: true}
	pointers, err := lfs.ScanRefs(ref, "", scanOpt)
	if err != nil {
		Panic(err, "Could not scan for Git LFS files")
	}

	for _, p := range pointers {
		Print(p.Name)
	}
}

// pushCommand pushes local objects to a Git LFS server.  It takes two
// arguments:
//
//   `<remote> <remote ref>`
//
// Both a remote name ("origin") or a remote URL are accepted.
//
// pushCommand calculates the git objects to send by looking comparing the range
// of commits between the local and remote git servers.
func pushCommand(cmd *cobra.Command, args []string) {
	var left, right string

	if len(args) == 0 {
		Print("Specify a remote and a remote branch name (`git lfs push origin master`)")
		os.Exit(1)
	}

	lfs.Config.CurrentRemote = args[0]

	if useStdin {
		requireStdin("Run this command from the Git pre-push hook, or leave the --stdin flag off.")

		// called from a pre-push hook!  Update the existing pre-push hook if it's
		// one that git-lfs set.
		lfs.InstallHooks(false)

		refsData, err := ioutil.ReadAll(os.Stdin)
		if err != nil {
			Panic(err, "Error reading refs on stdin")
		}

		if len(refsData) == 0 {
			return
		}

		left, right = decodeRefs(string(refsData))
		if left == pushDeleteBranch {
			return
		}
	} else {
		var remoteArg, refArg string

		if len(args) < 1 {
			Print("Usage: git lfs push --dry-run <remote> [ref]")
			return
		}

		remoteArg = args[0]
		if len(args) == 2 {
			refArg = args[1]
		}

		localRef, err := git.CurrentRef()
		if err != nil {
			Panic(err, "Error getting local ref")
		}
		left = localRef

		remoteRef, err := git.LsRemote(remoteArg, refArg)
		if err != nil {
			Panic(err, "Error getting remote ref")
		}

		if remoteRef != "" {
			right = "^" + strings.Split(remoteRef, "\t")[0]
		}
	}

	// Just use scanner here
	pointers, err := lfs.ScanRefs(left, right)
	if err != nil {
		Panic(err, "Error scanning for Git LFS files")
	}

	uploadQueue := lfs.NewUploadQueue(lfs.Config.ConcurrentTransfers(), len(pointers))

	for i, pointer := range pointers {
		if pushDryRun {
			Print("push %s", pointer.Name)
			continue
		}
		tracerx.Printf("checking_asset: %s %s %d/%d", pointer.Oid, pointer.Name, i+1, len(pointers))

		u, wErr := lfs.NewUploadable(pointer.Oid, pointer.Name, i+1, len(pointers))
		if wErr != nil {
			if Debugging || wErr.Panic {
				Panic(wErr.Err, wErr.Error())
			} else {
				Exit(wErr.Error())
			}
		}
		uploadQueue.Add(u)
	}

	if !pushDryRun {
		uploadQueue.Process()
		for _, err := range uploadQueue.Errors() {
			if Debugging || err.Panic {
				LoggedError(err.Err, err.Error())
			} else {
//.........這裏部分代碼省略.........

func doFsck() (bool, error) {
	requireInRepo()

	ref, err := git.CurrentRef()
	if err != nil {
		return false, err
	}

	// The LFS scanner methods return unexported *lfs.wrappedPointer objects.
	// All we care about is the pointer OID and file name
	pointerIndex := make(map[string]string)

	pointers, err := lfs.ScanRefs(ref.Sha, "", nil)
	if err != nil {
		return false, err
	}

	for _, p := range pointers {
		pointerIndex[p.Oid] = p.Name
	}

	// TODO(zeroshirts): do we want to look for LFS stuff in past commits?
	p2, err := lfs.ScanIndex()
	if err != nil {
		return false, err
	}

	for _, p := range p2 {
		pointerIndex[p.Oid] = p.Name
	}

	ok := true

	for oid, name := range pointerIndex {
		path := lfs.LocalMediaPathReadOnly(oid)

		Debug("Examining %v (%v)", name, path)

		f, err := os.Open(path)
		if pErr, pOk := err.(*os.PathError); pOk {
			Print("Object %s (%s) could not be checked: %s", name, oid, pErr.Err)
			ok = false
			continue
		}
		if err != nil {
			return false, err
		}

		oidHash := sha256.New()
		_, err = io.Copy(oidHash, f)
		f.Close()
		if err != nil {
			return false, err
		}

		recalculatedOid := hex.EncodeToString(oidHash.Sum(nil))
		if recalculatedOid != oid {
			ok = false
			Print("Object %s (%s) is corrupt", name, oid)
			if fsckDryRun {
				continue
			}

			badDir := filepath.Join(config.LocalGitStorageDir, "lfs", "bad")
			if err := os.MkdirAll(badDir, 0755); err != nil {
				return false, err
			}

			badFile := filepath.Join(badDir, oid)
			if err := os.Rename(path, badFile); err != nil {
				return false, err
			}
			Print("  moved to %s", badFile)
		}
	}
	return ok, nil
}

// prePushCommand is run through Git's pre-push hook. The pre-push hook passes
// two arguments on the command line:
//
//   1. Name of the remote to which the push is being done
//   2. URL to which the push is being done
//
// The hook receives commit information on stdin in the form:
//   <local ref> <local sha1> <remote ref> <remote sha1>
//
// In the typical case, prePushCommand will get a list of git objects being
// pushed by using the following:
//
//    git rev-list --objects <local sha1> ^<remote sha1>
//
// If any of those git objects are associated with Git LFS objects, those
// objects will be pushed to the Git LFS API.
//
// In the case of pushing a new branch, the list of git objects will be all of
// the git objects in this branch.
//
// In the case of deleting a branch, no attempts to push Git LFS objects will be
// made.
func prePushCommand(cmd *cobra.Command, args []string) {
	var left, right string

	if len(args) == 0 {
		Print("This should be run through Git's pre-push hook.  Run `git lfs update` to install it.")
		os.Exit(1)
	}

	lfs.Config.CurrentRemote = args[0]

	refsData, err := ioutil.ReadAll(os.Stdin)
	if err != nil {
		Panic(err, "Error reading refs on stdin")
	}

	if len(refsData) == 0 {
		return
	}

	left, right = decodeRefs(string(refsData))
	if left == prePushDeleteBranch {
		return
	}

	// Just use scanner here
	pointers, err := lfs.ScanRefs(left, right, nil)
	if err != nil {
		Panic(err, "Error scanning for Git LFS files")
	}

	uploadQueue := lfs.NewUploadQueue(lfs.Config.ConcurrentTransfers(), len(pointers))

	for _, pointer := range pointers {
		if prePushDryRun {
			Print("push %s", pointer.Name)
			continue
		}

		u, wErr := lfs.NewUploadable(pointer.Oid, pointer.Name)
		if wErr != nil {
			if cleanPointerErr, ok := wErr.Err.(*lfs.CleanedPointerError); ok {
				Exit("%s is an LFS pointer to %s, which does not exist in .git/lfs/objects.\n\nRun 'git lfs fsck' to verify Git LFS objects.",
					pointer.Name, cleanPointerErr.Pointer.Oid)
			} else if Debugging || wErr.Panic {
				Panic(wErr.Err, wErr.Error())
			} else {
				Exit(wErr.Error())
			}
		}

		uploadQueue.Add(u)
	}

	if !prePushDryRun {
		uploadQueue.Process()
		for _, err := range uploadQueue.Errors() {
			if Debugging || err.Panic {
				LoggedError(err.Err, err.Error())
			} else {
				Error(err.Error())
			}
		}

		if len(uploadQueue.Errors()) > 0 {
			os.Exit(2)
		}
	}
}