// NewWatcher creates a new watcher to watch filesystem events.
func NewWatcher(port int) error {
	if runtime.GOOS == "darwin" {
		tweakLimit()
	}

	watcher, err := watcher.New(1 * time.Second)
	var wg sync.WaitGroup

	if err != nil {
		fmt.Println(err)
		return err
	}

	defer watcher.Close()

	wg.Add(1)

	for _, d := range getDirList() {
		if d != "" {
			_ = watcher.Add(d)
		}
	}

	go func() {
		for {
			select {
			case evs := <-watcher.Events:
				jww.INFO.Println("File System Event:", evs)

				staticChanged := false
				dynamicChanged := false
				staticFilesChanged := make(map[string]bool)

				for _, ev := range evs {
					ext := filepath.Ext(ev.Name)
					istemp := strings.HasSuffix(ext, "~") || (ext == ".swp") || (ext == ".swx") || (ext == ".tmp") || strings.HasPrefix(ext, ".goutputstream")
					if istemp {
						continue
					}
					// renames are always followed with Create/Modify
					if ev.Op&fsnotify.Rename == fsnotify.Rename {
						continue
					}

					isstatic := strings.HasPrefix(ev.Name, helpers.GetStaticDirPath()) || (len(helpers.GetThemesDirPath()) > 0 && strings.HasPrefix(ev.Name, helpers.GetThemesDirPath()))
					staticChanged = staticChanged || isstatic
					dynamicChanged = dynamicChanged || !isstatic

					if isstatic {
						if staticPath, err := helpers.MakeStaticPathRelative(ev.Name); err == nil {
							staticFilesChanged[staticPath] = true
						}
					}

					// add new directory to watch list
					if s, err := os.Stat(ev.Name); err == nil && s.Mode().IsDir() {
						if ev.Op&fsnotify.Create == fsnotify.Create {
							watcher.Add(ev.Name)
						}
					}
				}

				if staticChanged {
					jww.FEEDBACK.Printf("Static file changed, syncing\n\n")
					utils.StopOnErr(copyStatic(), fmt.Sprintf("Error copying static files to %s", helpers.AbsPathify(viper.GetString("PublishDir"))))

					if !BuildWatch && !viper.GetBool("DisableLiveReload") {
						// Will block forever trying to write to a channel that nobody is reading if livereload isn't initalized

						// force refresh when more than one file
						if len(staticFilesChanged) == 1 {
							for path := range staticFilesChanged {
								livereload.RefreshPath(path)
							}

						} else {
							livereload.ForceRefresh()
						}
					}
				}

				if dynamicChanged {
					fmt.Print("\nChange detected, rebuilding site\n")
					const layout = "2006-01-02 15:04 -0700"
					fmt.Println(time.Now().Format(layout))
					utils.CheckErr(buildSite(true))

					if !BuildWatch && !viper.GetBool("DisableLiveReload") {
						// Will block forever trying to write to a channel that nobody is reading if livereload isn't initalized
						livereload.ForceRefresh()
					}
				}
			case err := <-watcher.Errors:
				if err != nil {
					fmt.Println("error:", err)
				}
			}
		}
	}()
//.........这里部分代码省略.........

//.........这里部分代码省略.........
						if staticSourceFs == nil {
							jww.WARN.Println("No static directories found to sync")
							return
						}

						syncer := fsync.NewSyncer()
						syncer.NoTimes = viper.GetBool("notimes")
						syncer.SrcFs = staticSourceFs
						syncer.DestFs = hugofs.DestinationFS

						// prevent spamming the log on changes
						logger := helpers.NewDistinctFeedbackLogger()

						for _, ev := range staticEvents {
							// Due to our approach of layering both directories and the content's rendered output
							// into one we can't accurately remove a file not in one of the source directories.
							// If a file is in the local static dir and also in the theme static dir and we remove
							// it from one of those locations we expect it to still exist in the destination
							//
							// If Hugo generates a file (from the content dir) over a static file
							// the content generated file should take precedence.
							//
							// Because we are now watching and handling individual events it is possible that a static
							// event that occupies the same path as a content generated file will take precedence
							// until a regeneration of the content takes places.
							//
							// Hugo assumes that these cases are very rare and will permit this bad behavior
							// The alternative is to track every single file and which pipeline rendered it
							// and then to handle conflict resolution on every event.

							fromPath := ev.Name

							// If we are here we already know the event took place in a static dir
							relPath, err := helpers.MakeStaticPathRelative(fromPath)
							if err != nil {
								fmt.Println(err)
								continue
							}

							// Remove || rename is harder and will require an assumption.
							// Hugo takes the following approach:
							// If the static file exists in any of the static source directories after this event
							// Hugo will re-sync it.
							// If it does not exist in all of the static directories Hugo will remove it.
							//
							// This assumes that Hugo has not generated content on top of a static file and then removed
							// the source of that static file. In this case Hugo will incorrectly remove that file
							// from the published directory.
							if ev.Op&fsnotify.Rename == fsnotify.Rename || ev.Op&fsnotify.Remove == fsnotify.Remove {
								if _, err := staticSourceFs.Stat(relPath); os.IsNotExist(err) {
									// If file doesn't exist in any static dir, remove it
									toRemove := filepath.Join(publishDir, relPath)
									logger.Println("File no longer exists in static dir, removing", toRemove)
									hugofs.DestinationFS.RemoveAll(toRemove)
								} else if err == nil {
									// If file still exists, sync it
									logger.Println("Syncing", relPath, "to", publishDir)
									if err := syncer.Sync(filepath.Join(publishDir, relPath), relPath); err != nil {
										jww.ERROR.Println(err)
									}
								} else {
									jww.ERROR.Println(err)
								}

								continue
							}

// NewWatcher creates a new watcher to watch filesystem events.
func NewWatcher(port int) error {
	if runtime.GOOS == "darwin" {
		tweakLimit()
	}

	watcher, err := watcher.New(1 * time.Second)
	var wg sync.WaitGroup

	if err != nil {
		return err
	}

	defer watcher.Close()

	wg.Add(1)

	for _, d := range getDirList() {
		if d != "" {
			_ = watcher.Add(d)
		}
	}

	go func() {
		for {
			select {
			case evs := <-watcher.Events:
				jww.INFO.Println("File System Event:", evs)

				staticChanged := false
				dynamicChanged := false
				staticFilesChanged := make(map[string]bool)

				for _, ev := range evs {
					ext := filepath.Ext(ev.Name)
					istemp := strings.HasSuffix(ext, "~") || (ext == ".swp") || (ext == ".swx") || (ext == ".tmp") || strings.HasPrefix(ext, ".goutputstream") || strings.HasSuffix(ext, "jb_old___") || strings.HasSuffix(ext, "jb_bak___")
					if istemp {
						continue
					}
					// renames are always followed with Create/Modify
					if ev.Op&fsnotify.Rename == fsnotify.Rename {
						continue
					}

					// Write and rename operations are often followed by CHMOD.
					// There may be valid use cases for rebuilding the site on CHMOD,
					// but that will require more complex logic than this simple conditional.
					// On OS X this seems to be related to Spotlight, see:
					// https://github.com/go-fsnotify/fsnotify/issues/15
					// A workaround is to put your site(s) on the Spotlight exception list,
					// but that may be a little mysterious for most end users.
					// So, for now, we skip reload on CHMOD.
					if ev.Op&fsnotify.Chmod == fsnotify.Chmod {
						continue
					}

					isstatic := strings.HasPrefix(ev.Name, helpers.GetStaticDirPath()) || (len(helpers.GetThemesDirPath()) > 0 && strings.HasPrefix(ev.Name, helpers.GetThemesDirPath()))
					staticChanged = staticChanged || isstatic
					dynamicChanged = dynamicChanged || !isstatic

					if isstatic {
						if staticPath, err := helpers.MakeStaticPathRelative(ev.Name); err == nil {
							staticFilesChanged[staticPath] = true
						}
					}

					// add new directory to watch list
					if s, err := os.Stat(ev.Name); err == nil && s.Mode().IsDir() {
						if ev.Op&fsnotify.Create == fsnotify.Create {
							watcher.Add(ev.Name)
						}
					}
				}

				if staticChanged {
					jww.FEEDBACK.Printf("Static file changed, syncing\n")
					if viper.GetBool("ForceSyncStatic") {
						jww.FEEDBACK.Printf("Syncing all static files\n")
						err := copyStatic()
						if err != nil {
							fmt.Println(err)
							utils.StopOnErr(err, fmt.Sprintf("Error copying static files to %s", helpers.AbsPathify(viper.GetString("PublishDir"))))
						}
					} else {

						syncer := fsync.NewSyncer()
						syncer.NoTimes = viper.GetBool("notimes")
						syncer.SrcFs = hugofs.SourceFs
						syncer.DestFs = hugofs.DestinationFS

						publishDir := helpers.AbsPathify(viper.GetString("PublishDir")) + helpers.FilePathSeparator

						if publishDir == "//" || publishDir == helpers.FilePathSeparator {
							publishDir = ""
						}

						for path := range staticFilesChanged {
							staticPath := filepath.Join(helpers.AbsPathify(viper.GetString("StaticDir")), path)
							jww.FEEDBACK.Printf("Syncing file '%s'\n", staticPath)

//.........这里部分代码省略.........