Separate watcher, create event object

watcher.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"github.com/howeyc/fsnotify"
+)
+
+func StartWatching(watchDir string, fileUpdates chan *Event) {
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		panic("Failed to create fsnotify watcher")
+	}
+
+	err = watcher.Watch(watchDir)
+	if err != nil {
+		panic("Failed to watch " + watchDir)
+	}
+
+	for {
+		select {
+		case ev := <-watcher.Event:
+			event := new(Event)
+			if ev.IsCreate() || ev.IsModify() {
+				event.Type = UPDATE
+			} else if ev.IsDelete() || ev.IsRename() {
+				event.Type = DELETE
+			} else {
+				panic("Unknown fsnotify event type")
+			}
+
+			event.Path = ev.Name
+			if event.IsUpdate() {
+				event.Hash, err = HashFile(ev.Name)
+				if err != nil { continue }
+			} else {
+				event.Hash = ""
+			}
+
+			fileUpdates <- event
+
+			//TODO if creating a directory, start watching it (and then initiate a full scan of it so we're sure nothing slipped through the cracks)
+
+		case err := <-watcher.Error:
+			panic(err)
+		}
+	}
+}