restructure inotify package and add some tests

internal/inotify/inotify.go

@@ -6,26 +6,12 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-type InotifyWatcher struct{}
-
-func NewInotifyWatcher() *InotifyWatcher {
-	return &InotifyWatcher{}
-}
-
-func (i *InotifyWatcher) Setup(rdirs, dirs []string) (chan struct{}, chan string, error) {
-	triggerCh := make(chan struct{})
-	fsEventCh := make(chan string)
-	return triggerCh, fsEventCh, nil
-}
-
 type Inotify struct {
 	fd       int
 	watchers map[int]*watcher
-	ping     chan struct{}
-	paused   bool
 }
 
-func NewInotify(ping chan struct{}, print bool) (*Inotify, error) {
+func NewInotify() (*Inotify, error) {
 	fd, errno := unix.InotifyInit1(unix.IN_CLOEXEC)
 	if fd == -1 {
 		return nil, fmt.Errorf("Can't init inotify: %d", errno)
@@ -34,16 +20,13 @@ func NewInotify(ping chan struct{}, print bool) (*Inotify, error) {
 	i := &Inotify{
 		fd:       fd,
 		watchers: make(map[int]*watcher),
-		ping:     ping,
-		paused:   false,
 	}
-	go watch(i, print)
 
 	return i, nil
 }
 
 func (i *Inotify) Watch(dir string) error {
-	w, err := newWatcher(i.fd, dir, i.ping)
+	w, err := newWatcher(i.fd, dir)
 	if err != nil {
 		return fmt.Errorf("creating watcher: %v", err)
 	}
@@ -58,14 +41,6 @@ func (i *Inotify) Close() error {
 	return nil
 }
 
-func (i *Inotify) Pause() {
-	i.paused = true
-}
-
-func (i *Inotify) UnPause() {
-	i.paused = false
-}
-
 func (i *Inotify) NumWatchers() int {
 	return len(i.watchers)
 }
@@ -81,24 +56,3 @@ func (i *Inotify) String() string {
 		return fmt.Sprintf("Watching %d directories", len(i.watchers))
 	}
 }
-
-type bufRead struct {
-	n   int
-	buf []byte
-}
-
-func watch(i *Inotify, print bool) {
-	buf := make([]byte, 5*unix.SizeofInotifyEvent)
-	buffers := make(chan bufRead)
-	go eventLogger(i, buffers, print)
-	for {
-		n, _ := unix.Read(i.fd, buf)
-		if !i.paused {
-			i.ping <- struct{}{}
-		}
-		buffers <- bufRead{
-			n:   n,
-			buf: buf,
-		}
-	}
-}