Golang lfs.TransferQueue類代碼示例

func prune(verifyRemote, dryRun, verbose bool) {
	localObjects := make([]localstorage.Object, 0, 100)
	retainedObjects := lfs.NewStringSetWithCapacity(100)
	var reachableObjects lfs.StringSet
	var taskwait sync.WaitGroup

	// Add all the base funcs to the waitgroup before starting them, in case
	// one completes really fast & hits 0 unexpectedly
	// each main process can Add() to the wg itself if it subdivides the task
	taskwait.Add(4) // 1..4: localObjects, current & recent refs, unpushed, worktree
	if verifyRemote {
		taskwait.Add(1) // 5
	}

	progressChan := make(PruneProgressChan, 100)

	// Collect errors
	errorChan := make(chan error, 10)
	var errorwait sync.WaitGroup
	errorwait.Add(1)
	var taskErrors []error
	go pruneTaskCollectErrors(&taskErrors, errorChan, &errorwait)

	// Populate the single list of local objects
	go pruneTaskGetLocalObjects(&localObjects, progressChan, &taskwait)

	// Now find files to be retained from many sources
	retainChan := make(chan string, 100)

	go pruneTaskGetRetainedCurrentAndRecentRefs(retainChan, errorChan, &taskwait)
	go pruneTaskGetRetainedUnpushed(retainChan, errorChan, &taskwait)
	go pruneTaskGetRetainedWorktree(retainChan, errorChan, &taskwait)
	if verifyRemote {
		reachableObjects = lfs.NewStringSetWithCapacity(100)
		go pruneTaskGetReachableObjects(&reachableObjects, errorChan, &taskwait)
	}

	// Now collect all the retained objects, on separate wait
	var retainwait sync.WaitGroup
	retainwait.Add(1)
	go pruneTaskCollectRetained(&retainedObjects, retainChan, progressChan, &retainwait)

	// Report progress
	var progresswait sync.WaitGroup
	progresswait.Add(1)
	go pruneTaskDisplayProgress(progressChan, &progresswait)

	taskwait.Wait()   // wait for subtasks
	close(retainChan) // triggers retain collector to end now all tasks have
	retainwait.Wait() // make sure all retained objects added

	close(errorChan) // triggers error collector to end now all tasks have
	errorwait.Wait() // make sure all errors have been processed
	pruneCheckErrors(taskErrors)

	prunableObjects := make([]string, 0, len(localObjects)/2)

	// Build list of prunables (also queue for verify at same time if applicable)
	var verifyQueue *lfs.TransferQueue
	var verifiedObjects lfs.StringSet
	var totalSize int64
	var verboseOutput bytes.Buffer
	if verifyRemote {
		lfs.Config.CurrentRemote = lfs.Config.FetchPruneConfig().PruneRemoteName
		// build queue now, no estimates or progress output
		verifyQueue = lfs.NewDownloadCheckQueue(0, 0, true)
		verifiedObjects = lfs.NewStringSetWithCapacity(len(localObjects) / 2)
	}
	for _, file := range localObjects {
		if !retainedObjects.Contains(file.Oid) {
			prunableObjects = append(prunableObjects, file.Oid)
			totalSize += file.Size
			if verbose {
				// Save up verbose output for the end, spinner still going
				verboseOutput.WriteString(fmt.Sprintf(" * %v (%v)\n", file.Oid, humanizeBytes(file.Size)))
			}
			if verifyRemote {
				tracerx.Printf("VERIFYING: %v", file.Oid)
				pointer := lfs.NewPointer(file.Oid, file.Size, nil)
				verifyQueue.Add(lfs.NewDownloadCheckable(&lfs.WrappedPointer{Pointer: pointer}))
			}
		}
	}

	if verifyRemote {
		// this channel is filled with oids for which Check() succeeded & Transfer() was called
		verifyc := verifyQueue.Watch()
		var verifywait sync.WaitGroup
		verifywait.Add(1)
		go func() {
			for oid := range verifyc {
				verifiedObjects.Add(oid)
				tracerx.Printf("VERIFIED: %v", oid)
				progressChan <- PruneProgress{PruneProgressTypeVerify, 1}
			}
			verifywait.Done()
		}()
		verifyQueue.Wait()
		verifywait.Wait()
		close(progressChan) // after verify (uses spinner) but before check
//.........這裏部分代碼省略.........

// 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 uploadQueue *lfs.TransferQueue

	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
		}

		uploadQueue = uploadsBetweenRefs(left, right)
	} else if pushObjectIDs {
		if len(args) < 2 {
			Print("Usage: git lfs push --object-id <remote> <lfs-object-id> [lfs-object-id] ...")
			return
		}

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

		uploadQueue = uploadsBetweenRefAndRemote(args[0], args[1:])
	}

	if !pushDryRun {
		uploadQueue.Wait()
		for _, err := range uploadQueue.Errors() {
			if Debugging || lfs.IsFatalError(err) {
				LoggedError(err, err.Error())
			} else {
				Error(err.Error())
			}
		}

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