예제 #1
0
// This example shows how to work with EventInfo's underlying FSEvent struct.
// Investigating notify.(*FSEvent).Flags field we are able to say whether
// the event's path is a file or a directory and many more.
func ExampleWatch_darwinDirFileSymlink() {
	var must = func(err error) {
		if err != nil {
			log.Fatal(err)
		}
	}
	var stop = func(c ...chan<- notify.EventInfo) {
		for _, c := range c {
			notify.Stop(c)
		}
	}

	// Make the channels buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	dir := make(chan notify.EventInfo, 1)
	file := make(chan notify.EventInfo, 1)
	symlink := make(chan notify.EventInfo, 1)
	all := make(chan notify.EventInfo, 1)

	// Set up a single watchpoint listening for FSEvents-specific events on
	// multiple user-provided channels.
	must(notify.Watch(".", dir, notify.FSEventsIsDir))
	must(notify.Watch(".", file, notify.FSEventsIsFile))
	must(notify.Watch(".", symlink, notify.FSEventsIsSymlink))
	must(notify.Watch(".", all, notify.All))
	defer stop(dir, file, symlink, all)

	// Block until an event is received.
	select {
	case ei := <-dir:
		log.Println("The directory", ei.Path(), "has changed")
	case ei := <-file:
		log.Println("The file", ei.Path(), "has changed")
	case ei := <-symlink:
		log.Println("The symlink", ei.Path(), "has changed")
	case ei := <-all:
		var kind string

		// Investigate underlying *notify.FSEvent struct to access more
		// information about the event.
		switch flags := ei.Sys().(*notify.FSEvent).Flags; {
		case flags&notify.FSEventsIsFile != 0:
			kind = "file"
		case flags&notify.FSEventsIsDir != 0:
			kind = "dir"
		case flags&notify.FSEventsIsSymlink != 0:
			kind = "symlink"
		}

		log.Printf("The %s under path %s has been %sd\n", kind, ei.Path(), ei.Event())
	}
}
예제 #2
0
파일: main.go 프로젝트: getapp/golisten
func newWatcher(path string, include, exclude *regexp.Regexp) (*watcher, error) {
	events := make(chan notify.EventInfo, 10)
	ops := make(chan Operation, 10)

	if err := notify.Watch(path+"/...", events, notify.All); err != nil {
		return nil, err
	}

	go func() {
		for ev := range events {
			if include.MatchString(ev.Path()) == false {
				debug(fmt.Sprintf("Skipping: does not match include path: %s", ev.Path()))
				continue
			}

			if exclude.MatchString(ev.Path()) == true {
				debug(fmt.Sprintf("Skipping: does match exclude path: %s", ev.Path()))
				continue
			}

			ops <- Operation{
				Path:      ev.Path(),
				EventInfo: ev,
			}
		}
	}()

	return &watcher{ops: ops, events: events}, nil
}
예제 #3
0
// This example shows why it is important to not create leaks by stoping
// a channel when it's no longer being used.
func ExampleStop() {
	waitfor := func(path string, e notify.Event, timeout time.Duration) bool {
		dir, file := filepath.Split(path)
		c := make(chan notify.EventInfo, 1)

		if err := notify.Watch(dir, c, e); err != nil {
			log.Fatal(err)
		}
		// Clean up watchpoint associated with c. If Stop was not called upon
		// return the channel would be leaked as notify holds the only reference
		// to it and does not release it on its own.
		defer notify.Stop(c)

		t := time.After(timeout)

		for {
			select {
			case ei := <-c:
				if filepath.Base(ei.Path()) == file {
					return true
				}
			case <-t:
				return false
			}
		}
	}

	if waitfor("index.lock", notify.Create, 5*time.Second) {
		log.Println("The git repository was locked")
	}

	if waitfor("index.lock", notify.Remove, 5*time.Second) {
		log.Println("The git repository was unlocked")
	}
}
예제 #4
0
파일: watch.go 프로젝트: mattn/modd
// Watch watches a set of paths. Mod structs representing a changeset are sent
// on the channel ch.
//
// Watch applies heuristics to cope with transient files and unreliable event
// notifications. Modifications are batched up until there is a a lull in the
// stream of changes of duration lullTime. This lets us represent processes
// that progressively affect multiple files, like rendering, as a single
// changeset.
func Watch(paths []string, lullTime time.Duration, ch chan *Mod) (*Watcher, error) {
	evtch := make(chan notify.EventInfo, 4096)
	for _, p := range paths {
		stat, err := os.Stat(p)
		if err != nil {
			return nil, err
		}
		if stat.IsDir() {
			p = path.Join(p, "...")
		}
		err = notify.Watch(p, evtch, notify.All)
		if err != nil {
			return nil, err
		}
	}
	go func() {
		for {
			b := batch(lullTime, MaxLullWait, statExistenceChecker{}, evtch)
			if b != nil && !b.Empty() {
				ret, err := b.normPaths(paths)
				if err != nil {
					Logger.Shout("Error normalising paths: %s", err)
				}
				ch <- ret
			}
		}
	}()
	return &Watcher{evtch}, nil
}
예제 #5
0
파일: watch.go 프로젝트: lox/binarystar
func (w *Watcher) Watch() error {
	notifyCh := make(chan notify.EventInfo, 10)

	if err := notify.Watch(w.Dir+"/...", notifyCh, notifyEvents...); err != nil {
		return err
	}

	go func() {
		for ei := range notifyCh {
			if !w.Matcher.Match(ei.Path()) {
				continue
			}

			ev := FileEvent{
				Path: ei.Path(),
				Type: convertNotifyType(ei.Event()),
				Time: time.Now().UnixNano(),
			}

			log.Println(ev)
			w.Events <- ev
		}
	}()

	return nil
}
예제 #6
0
func main() {
	// Make the channel buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	c := make(chan notify.EventInfo, 1)

	// Set up a watchpoint listening for inotify-specific events within a
	// current working directory. Dispatch each InCloseWrite and InMovedTo
	// events separately to c.
	if err := notify.Watch(".", c, notify.FSEventsModified, notify.FSEventsRemoved); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)

	// Block until an event is received.
	switch ei := <-c; ei.Event() {
	case notify.FSEventsChangeOwner:
		log.Println("The owner of", ei.Path(), "has changed.")
	case notify.FSEventsMount:
		log.Println("The path", ei.Path(), "has been mounted.")
	}
	// switch ei := <-c; ei.Event() {
	// case notify.FSEventsModified:
	// 	log.Println("Editing of", ei.Path(), "file is done.")
	// case notify.FSEventsRemoved:
	// 	log.Println("File", ei.Path(), "was swapped/moved into the watched directory.")
	// }
}
예제 #7
0
파일: modd.go 프로젝트: rawbite/devd
// Watch watches a path p, batching events with duration batchTime. A list of
// strings are written to chan, representing all files changed, added or
// removed. We apply heuristics to cope with things like transient files and
// unreliable event notifications.
func Watch(p string, batchTime time.Duration, ch chan []string) error {
	stat, err := os.Stat(p)
	if err != nil {
		return err
	}
	if stat.IsDir() {
		p = path.Join(p, "...")
	}
	evtch := make(chan notify.EventInfo)
	err = notify.Watch(p, evtch, notify.All)
	if err == nil {
		go func() {
			for {
				ret := batch(batchTime, statChecker{}, evtch)
				if len(ret) > 0 {
					for i := range ret {
						norm, _ := normPath(p, ret[i])
						ret[i] = norm
					}
					ch <- ret
				}
			}
		}()
	}
	return err
}
예제 #8
0
// FSEvents may report multiple filesystem actions with one, coalesced event.
// Notify unscoalesces such event and dispatches series of single events
// back to the user.
//
// This example shows how to coalesce events by investigating notify.(*FSEvent).ID
// field, for the science.
func ExampleWatch_darwinCoalesce() {
	// Make the channels buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	c := make(chan notify.EventInfo, 4)

	// Set up a watchpoint listetning for events within current working directory.
	// Dispatch all platform-independent separately to c.
	if err := notify.Watch(".", c, notify.All); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)

	var id uint64
	var coalesced []notify.EventInfo

	for ei := range c {
		switch n := ei.Sys().(*notify.FSEvent).ID; {
		case id == 0:
			id = n
			coalesced = []notify.EventInfo{ei}
		case id == n:
			coalesced = append(coalesced, ei)
		default:
			log.Printf("FSEvents reported a filesystem action with the following"+
				" coalesced events %v groupped by %d ID\n", coalesced, id)
			return
		}
	}
}
예제 #9
0
func setUpFolderListener(path string, stop <-chan bool) {
	os.RemoveAll(path)
	os.Mkdir(path, os.ModePerm)

	replacer := replacer.NewMakerRegistry(path)

	for _, format := range allFormats() {
		for _, class := range allClasses() {
			replacer.Add(format, class)
		}
	}

	c := make(chan notify.EventInfo, 1000)
	if err := notify.Watch(path, c, notify.Rename, notify.Remove); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)
	go func() {
		for {
			select {
			case event := <-c:
				replacer.Replace(event.Path())
			}
		}
	}()

	<-stop
}
예제 #10
0
func stalk(c chan notify.EventInfo) {
	pathTree := filepath.Join(*path, "...")

	err := notify.Watch(pathTree, c, notify.All)

	if err != nil {
		fmt.Printf("cannot watch %s, %s\n", *path, err.Error())
		os.Exit(1)
	} else {
		log.Printf("Stalking path %s", *path)
	}

	for {
		ei := <-c

		if f := filterFiles(ei); f {
			log.Printf("%s\n", ei)
			execute(*cmd)
		}

		if *wait != 0 {
			time.Sleep(time.Duration(*wait) * time.Second)
		}
	}
}
예제 #11
0
// This example shows how to watch directory-name changes in the working directory subtree.
func ExampleWatch_windows() {
	// Make the channel buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	c := make(chan notify.EventInfo, 4)

	// Since notify package behaves exactly like ReadDirectoryChangesW function,
	// we must register notify.FileNotifyChangeDirName filter and wait for one
	// of FileAction* events.
	if err := notify.Watch("./...", c, notify.FileNotifyChangeDirName); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)

	// Wait for actions.
	for ei := range c {
		switch ei.Event() {
		case notify.FileActionAdded, notify.FileActionRenamedNewName:
			log.Println("Created:", ei.Path())
		case notify.FileActionRemoved, notify.FileActionRenamedOldName:
			log.Println("Removed:", ei.Path())
		case notify.FileActionModified:
			panic("notify: unexpected action")
		}
	}
}
예제 #12
0
func (d *Dispatcher) watch() {
	for _, path := range d.Paths {
		recursivePath := filepath.Join(path.Name, "...")
		if err := notify.Watch(recursivePath, d.watcher, flags...); err != nil {
			d.log.Error(err)
		} else {
			d.log.WithFields(logrus.Fields{"path": path.Name}).Info("Watching recursively")
		}
	}
}
예제 #13
0
파일: watch.go 프로젝트: skyfree02/devd
func watch(p string, ch chan notify.EventInfo) error {
	stat, err := os.Stat(p)
	if err != nil {
		return err
	}
	if stat.IsDir() {
		p = path.Join(p, "...")
	}
	return notify.Watch(p, ch, notify.All)
}
예제 #14
0
func (w *watcher) loop() {
	defer func() {
		w.ac.mu.Lock()
		w.running = false
		w.starting = false
		w.ac.mu.Unlock()
	}()

	err := notify.Watch(w.ac.keydir, w.ev, notify.All)
	if err != nil {
		glog.V(logger.Detail).Infof("can't watch %s: %v", w.ac.keydir, err)
		return
	}
	defer notify.Stop(w.ev)
	glog.V(logger.Detail).Infof("now watching %s", w.ac.keydir)
	defer glog.V(logger.Detail).Infof("no longer watching %s", w.ac.keydir)

	w.ac.mu.Lock()
	w.running = true
	w.ac.mu.Unlock()

	// Wait for file system events and reload.
	// When an event occurs, the reload call is delayed a bit so that
	// multiple events arriving quickly only cause a single reload.
	var (
		debounce          = time.NewTimer(0)
		debounceDuration  = 500 * time.Millisecond
		inCycle, hadEvent bool
	)
	defer debounce.Stop()
	for {
		select {
		case <-w.quit:
			return
		case <-w.ev:
			if !inCycle {
				debounce.Reset(debounceDuration)
				inCycle = true
			} else {
				hadEvent = true
			}
		case <-debounce.C:
			w.ac.mu.Lock()
			w.ac.reload()
			w.ac.mu.Unlock()
			if hadEvent {
				debounce.Reset(debounceDuration)
				inCycle, hadEvent = true, false
			} else {
				inCycle, hadEvent = false, false
			}
		}
	}
}
예제 #15
0
파일: watcher.go 프로젝트: hongrich/revel
// Listen registers for events within the given root directories (recursively).
func (w *Watcher) Listen(listener Listener, roots ...string) {
	eventCh := make(chan notify.EventInfo, 100)

	// Walk through all files / directories under the root, adding each to watcher.
	for _, p := range roots {
		// is the directory / file a symlink?
		f, err := os.Lstat(p)
		if err == nil && f.Mode()&os.ModeSymlink == os.ModeSymlink {
			realPath, err := filepath.EvalSymlinks(p)
			if err != nil {
				panic(err)
			}
			p = realPath
		}

		fi, err := os.Stat(p)
		if err != nil {
			glog.Errorln("Failed to stat watched path", p, ":", err)
			continue
		}

		if fi.IsDir() {
			err = notify.Watch(p+string(filepath.Separator)+"...", eventCh, notify.All)
		} else {
			err = notify.Watch(p, eventCh, notify.All)
		}
		if err != nil {
			glog.Errorln("Failed to watch", p, ":", err)
		}
	}

	if w.eagerRebuildEnabled() {
		// Create goroutine to notify file changes in real time
		go w.NotifyWhenUpdated(listener, eventCh)
	}

	w.events = append(w.events, eventCh)
	w.listeners = append(w.listeners, listener)
}
예제 #16
0
파일: Users.go 프로젝트: LicaSterian/unsub
func watchFile() {
	c := make(chan notify.EventInfo, 1)
	if err := notify.Watch("./users.txt", c, 0x04000); err != nil {
		fmt.Println("error watching users file", err)
	}
	defer notify.Stop(c)

	// Block until an event is received.
	ei := <-c
	fmt.Println("Users - watchFile - users file has been changed", ei.Event())
	parseAndSetUsers()
	go watchFile()
}
예제 #17
0
func main() {
	// Make the channel buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	c := make(chan notify.EventInfo, 1)

	// Set up a watchpoint listening on events within current working directory.
	// Dispatch each create and remove events separately to c.
	if err := notify.Watch(".", c, notify.Create, notify.Remove); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)

	// Block until an event is received.
	ei := <-c
	log.Println("Got event:", ei)
}
예제 #18
0
// This example shows how to set up a recursive watchpoint.
func ExampleWatch_recursive() {
	// Make the channel buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	c := make(chan notify.EventInfo, 1)

	// Set up a watchpoint listening for events within a directory tree rooted
	// at current working directory. Dispatch remove events to c.
	if err := notify.Watch("./...", c, notify.Remove); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)

	// Block until an event is received.
	ei := <-c
	log.Println("Got event:", ei)
}
예제 #19
0
파일: taken.go 프로젝트: nohupped/taken
func main() {

	repotmp := "/repo/PKGBUILD/"
	currentuser, _ := user.Current()
	homedirs, _ := getHomes("/home/*")
	logFile := StartLog("/var/log/pkgbuild.log", currentuser)
	defer logFile.Close()
	Info.Println("\n\n\t\tI don't know who you are\n\t\tI don't know what you are syncing\n\t\tIf you are syncing via rsync, I can tell you \n\t\tI don't have the condition to pick it\n\t\tBut what I do have are a very particular set of channels\n\t\tChannels that pick up debs and push it to the repo\n\t\tI will look for debs in", homedirs, ", \n\t\tI will find it, and I will add it to repo . . .\n")
	fmt.Println("\n\n\t\tI don't know who you are\n\t\tI don't know what you are syncing\n\t\tIf you are syncing via rsync, I can tell you \n\t\tI don't have the condition to pick it\n\t\tBut what I do have are a very particular set of channels\n\t\tChannels that pick up debs and push it to the repo\n\t\tI will look for debs in", homedirs, ", \n\t\tI will find it, and I will add it to repo . . .\n")
	Info.Println("Starting taken . . .\nUse scp to copy deb files.")
	fmt.Println("Starting taken . . .\nUse scp to copy deb files.")
	Info.Println("Deb files will be moved to ", repotmp, "before pushing to repo")

	c := make(chan notify.EventInfo, 20)

	for _, i := range homedirs {
		if err := notify.Watch(i, c, notify.InCloseWrite, notify.Create); err != nil {
			log.Fatal(err)
		}
	}
	/*if err := notify.Watch("/home/girishg/", c, notify.InCloseWrite, notify.All); err != nil {
		log.Fatal(err)
	}
	if err := notify.Watch("/home/anotheruser/", c, notify.InCloseWrite, notify.All); err != nil {
		log.Fatal(err)
	}*/
	defer notify.Stop(c)

	for ei := range c {

		switch ei.Event() {
		case notify.Create:
			Info.Println(ei.Event(), ei.Path())
		case notify.InCloseWrite:
			Info.Println(ei.Event(), ei.Path())
			if ValidateDeb(ei.Path()) {
				debfile := moveDebs(ei.Path(), repotmp)
				CallAptlyAdd(debfile)
				CallAptlyShow()
				CallAptlyPublish()
			}

		}

	}

}
예제 #20
0
// New - Creates a new watcher which flushes caches.
func New(path string, cache CacheFlusher) (*Watcher, error) {
	events := make(chan notify.EventInfo, 1)
	path, err := filepath.Abs(path)
	if err != nil {
		return nil, err
	}
	path = filepath.Dir(path)
	path = filepath.Join(path, "...")
	err = notify.Watch(path, events, notify.All)
	if err != nil {
		return nil, fmt.Errorf("watching on %q: %v", path, err)
	}
	return &Watcher{
		events:  events,
		flusher: cache,
	}, nil
}
예제 #21
0
// Monitor the given path and call monitor() on match.
//
// If a glob includes **, the monitor will be recursive. eg.
//
// 		./src/thrift/**/*.thrift
//
// "id" is a unique identifier for the object doing the monitoring
func (f *FileMonitor) Monitor(id string, globs []*glob.Glob, monitor func(path string)) {
	for _, g := range globs {
		watch := g.Dir()
		entries, ok := f.monitors[watch]
		if !ok {
			entries = map[string]*fileMonitorEntry{}
			f.monitors[watch] = entries
		}
		entry, ok := entries[id]
		if !ok {
			entry = &fileMonitorEntry{
				ch:    make(chan notify.EventInfo, 128),
				globs: glob.Set{},
			}
			entries[id] = entry
			if g.IsRecursive() {
				watch = filepath.Join(watch, "...")
			}
			f.log.Debugf("Watching %s", watch)
			err := notify.Watch(watch, entry.ch, notify.All)
			if err != nil {
				f.log.Printf("Failed to watch %s", g)
				continue
			}
			go func() {
				for event := range entry.ch {
					for _, g := range entry.globs {
						if g.Match(event.Path()) {
							f.log.Debugf("%s -> %s", event, g)
							go monitor(event.Path())
							break
						}
					}
				}
			}()
		}
		if entry.globs.Contains(g) {
			continue
		}
		f.log.Debugf("  +%s", g)
		entry.globs.Add(g)
	}
}
예제 #22
0
파일: watch.go 프로젝트: justinyaoqi/devd
func watch(p string, ch chan string) error {
	stat, err := os.Stat(p)
	if err != nil {
		return err
	}
	if stat.IsDir() {
		p = path.Join(p, "...")
	}
	evtch := make(chan notify.EventInfo)
	err = notify.Watch(p, evtch, notify.All)
	if err == nil {
		go func() {
			for e := range evtch {
				ch <- e.Path()
			}
		}()
	}
	return err
}
예제 #23
0
파일: main.go 프로젝트: rjeczalik/cmd
func main() {
	var handlers []*handler
	if command != "" {
		h, err := newHandler(command)
		if err != nil {
			die(err)
		}
		handlers = append(handlers, h)
	}
	if file != "" {
		p, err := ioutil.ReadFile(file)
		if err != nil {
			die(err)
		}
		h, err := newHandler(string(p))
		if err != nil {
			die(err)
		}
		handlers = append(handlers, h)
	}
	var run []chan<- Event
	for _, h := range handlers {
		run = append(run, h.Daemon())
	}
	c := make(chan notify.EventInfo, 1)
	for _, path := range paths {
		if err := notify.Watch(path, c, notify.All); err != nil {
			die(err)
		}
	}
	for ei := range c {
		log.Println("received", ei)
		e := newEvent(ei)
		for _, run := range run {
			select {
			case run <- e:
			default:
				log.Println("event dropped due to slow handler")
			}
		}
	}
}
예제 #24
0
// Create new asset manager.
func New(cfg Config) (*Manager, error) {
	m := &Manager{
		cfg:        cfg,
		stopChan:   make(chan struct{}),
		eventsChan: make(chan notify.EventInfo, 20),
		files:      make(map[string]*file),
	}

	_, err := os.Stat(m.cfg.Path)
	if err == nil {
		err := notify.Watch(filepath.Join(m.cfg.Path, "..."), m.eventsChan, notify.InCloseWrite)
		if err != nil {
			return nil, err
		}
	}

	go m.notifyLoop()

	return m, nil
}
예제 #25
0
// This example shows how to use Sys() method from EventInfo interface to tie
// two separate events generated by rename(2) function.
func ExampleWatch_linuxMove() {
	// Make the channel buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	c := make(chan notify.EventInfo, 2)

	// Set up a watchpoint listening for inotify-specific events within a
	// current working directory. Dispatch each InMovedFrom and InMovedTo
	// events separately to c.
	if err := notify.Watch(".", c, notify.InMovedFrom, notify.InMovedTo); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)

	// Inotify reports move filesystem action by sending two events tied with
	// unique cookie value (uint32): one of the events is of InMovedFrom type
	// carrying move source path, while the second one is of InMoveTo type
	// carrying move destination path.
	moves := make(map[uint32]struct {
		From string
		To   string
	})

	// Wait for moves.
	for ei := range c {
		cookie := ei.Sys().(*syscall.InotifyEvent).Cookie

		info := moves[cookie]
		switch ei.Event() {
		case notify.InMovedFrom:
			info.From = ei.Path()
		case notify.InMovedTo:
			info.To = ei.Path()
		}
		moves[cookie] = info

		if cookie != 0 && info.From != "" && info.To != "" {
			log.Println("File:", info.From, "was renamed to", info.To)
			delete(moves, cookie)
		}
	}
}
예제 #26
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// This example shows how to use FSEvents-specifc event values.
func ExampleWatch_darwin() {
	// Make the channel buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	c := make(chan notify.EventInfo, 1)

	// Set up a watchpoint listening for FSEvents-specific events within a
	// current working directory. Dispatch each FSEventsChangeOwner and FSEventsMount
	// events separately to c.
	if err := notify.Watch(".", c, notify.FSEventsChangeOwner, notify.FSEventsMount); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)

	// Block until an event is received.
	switch ei := <-c; ei.Event() {
	case notify.FSEventsChangeOwner:
		log.Println("The owner of", ei.Path(), "has changed.")
	case notify.FSEventsMount:
		log.Println("The path", ei.Path(), "has been mounted.")
	}
}
예제 #27
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// This example shows how to watch changes made on file-system by text editor
// when saving a file. Usually, either InCloseWrite or InMovedTo (when swapping
// with a temporary file) event is created.
func ExampleWatch_linux() {
	// Make the channel buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	c := make(chan notify.EventInfo, 1)

	// Set up a watchpoint listening for inotify-specific events within a
	// current working directory. Dispatch each InCloseWrite and InMovedTo
	// events separately to c.
	if err := notify.Watch(".", c, notify.InCloseWrite, notify.InMovedTo); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)

	// Block until an event is received.
	switch ei := <-c; ei.Event() {
	case notify.InCloseWrite:
		log.Println("Editing of", ei.Path(), "file is done.")
	case notify.InMovedTo:
		log.Println("File", ei.Path(), "was swapped/moved into the watched directory.")
	}
}
예제 #28
0
파일: main.go 프로젝트: fanyang1988/etcddir
/*
Monitoring changes in file system.
It designed for run in separate goroutine.
*/
func fileMon(path string, bus chan fileChangeEvent) {
	// Make the channel buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	c := make(chan notify.EventInfo, 1)

	// Set up a watchpoint listening on events within current working directory.
	// Dispatch each create and remove events separately to c.
	if err := notify.Watch(path+"/...", c, notify.All); err != nil {
		log.Fatal(err)
	}
	defer notify.Stop(c)

	// Block until an event is received.
	for {
		event := <-c
		fstat, err := os.Lstat(event.Path())
		if os.IsNotExist(err) {
			bus <- fileChangeEvent{Path: event.Path(), IsRemoved: true}
			continue
		}

		if err != nil {
			log.Println(err)
			continue
		}

		if fstat.IsDir() {
			bus <- fileChangeEvent{Path: event.Path(), IsDir: true}
			continue
		}

		content, err := ioutil.ReadFile(event.Path())
		if err != nil {
			log.Println(err)
		}
		bus <- fileChangeEvent{Path: event.Path(), Content: content}
	}
}
예제 #29
0
// Watches for all fs events on an input path.
func (f *fsClient) Watch(params watchParams) (*watchObject, *probe.Error) {
	eventChan := make(chan Event)
	errorChan := make(chan *probe.Error)
	doneChan := make(chan bool)
	// Make the channel buffered to ensure no event is dropped. Notify will drop
	// an event if the receiver is not able to keep up the sending pace.
	neventChan := make(chan notify.EventInfo, 1)

	var fsEvents []notify.Event
	for _, event := range params.events {
		switch event {
		case "put":
			fsEvents = append(fsEvents, EventTypePut...)
		case "delete":
			fsEvents = append(fsEvents, EventTypeDelete...)
		default:
			return nil, errInvalidArgument().Trace(event)
		}
	}

	// Set up a watchpoint listening for events within a directory tree rooted
	// at current working directory. Dispatch remove events to c.
	recursivePath := f.PathURL.Path
	if params.recursive {
		recursivePath = f.PathURL.Path + "..."
	}
	if e := notify.Watch(recursivePath, neventChan, fsEvents...); e != nil {
		return nil, probe.NewError(e)
	}

	// wait for doneChan to close the watcher, eventChan and errorChan
	go func() {
		<-doneChan

		close(eventChan)
		close(errorChan)
		notify.Stop(neventChan)
	}()

	timeFormatFS := "2006-01-02T15:04:05.000Z"

	// Get fsnotify notifications for events and errors, and sent them
	// using eventChan and errorChan
	go func() {
		for {
			select {
			case event, ok := <-neventChan:
				if !ok {
					return
				}
				if isIgnoredFile(event.Path()) {
					continue
				}
				var i os.FileInfo
				if IsPutEvent(event.Event()) {
					// Look for any writes, send a response to indicate a full copy.
					var e error
					i, e = os.Stat(event.Path())
					if e != nil {
						if os.IsNotExist(e) {
							continue
						}
						errorChan <- probe.NewError(e)
						continue
					}
					if i.IsDir() {
						// we want files
						continue
					}
					eventChan <- Event{
						Time:   time.Now().Format(timeFormatFS),
						Size:   i.Size(),
						Path:   event.Path(),
						Client: f,
						Type:   EventCreate,
					}
				} else if IsDeleteEvent(event.Event()) {
					eventChan <- Event{
						Time:   time.Now().Format(timeFormatFS),
						Path:   event.Path(),
						Client: f,
						Type:   EventRemove,
					}
				}
			}
		}
	}()

	return &watchObject{
		events: eventChan,
		errors: errorChan,
		done:   doneChan,
	}, nil
}
예제 #30
0
func main() {
	setVerbosity()

	// Get port or die.
	port := getEnv("PORT")

	// Get content or die.
	getContent()

	root := getRoot()
	log.WithField("Root", root).Info("Our root directory")

	// We'll parse and store the responses ahead of time.
	resps, err := pages.Load(root)
	if err != nil {
		log.Fatalf("pages.Load: unexpected error: %s", err)
	}
	log.WithField("Resps", resps).Debug("The parsed responses")
	responses = Atomic{Resps: resps}

	log.Info("Starting server.")
	log.Info("Listening on port: ", port)

	// If jumpfile exists.
	if _, err := os.Stat(root + "/jumpfile.json"); err == nil {
		buf, err := ioutil.ReadFile(root + "/jumpfile.json")
		if err != nil {
			log.Warningln("jumpfile readfile: unexpected error: %s", err)
		}
		err = json.Unmarshal(buf, &jumpfile)
		if err != nil {
			log.Warningln("jumpfile unmarshal: unexpected error: %s", err)
		}
		log.Debugln(jumpfile)
	} else {
		log.Infoln("No jumpfile found")
	}

	// Our request handler.
	http.HandleFunc("/", handler)

	if watch {
		events := make(chan notify.EventInfo, 5)
		if err := notify.Watch(fmt.Sprintf("%s/...", root),
			events,
			notify.Create,
			notify.Remove,
			notify.Write,
			notify.Rename); err != nil {
			log.Warningln("notify.Watch:", err)
		}
		defer notify.Stop(events)

		go func() {
			for event := range events {
				log.Info("event:", event)
				// Lacks error handling as this should not run in production.
				responses.Resps, _ = pages.Load(getRoot())
			}
		}()
	}

	// Listen on port and serve with our handler.
	err = http.ListenAndServe(":"+port, nil)
	if err != nil {
		panic(err)
	}
}