Initial commit

main.go

@@ -0,0 +1,161 @@
+package main
+
+import (
+	"github.com/fsnotify/fsnotify"
+	"github.com/sirupsen/logrus"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"time"
+)
+
+type Ctx struct {
+	GlobalUploadTicker time.Ticker
+	FileMap            map[string]*File
+	TempDir            string
+	BeemCommand        func(string, string) (string, []string)
+}
+
+type File struct {
+	WaitTimer *time.Timer
+	BeemLock  bool
+}
+
+var CmdString = "rclone move %file remote:/beem/%dir"
+var InactiveDelay = time.Second * 5
+
+var ctx = Ctx{
+	FileMap: make(map[string]*File, 0),
+}
+
+func main() {
+	logrus.SetLevel(logrus.TraceLevel)
+
+	initTempDir()
+	ctx.BeemCommand = parseCommand(CmdString)
+
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		logrus.Fatal(err)
+	}
+
+	defer watcher.Close()
+
+	go handleFileChange(watcher)
+
+	err = watcher.Add("./test")
+	if err != nil {
+		logrus.Fatal(err)
+	}
+
+	//TODO gracefully handle SIGINT
+	done := make(chan bool)
+	<-done
+}
+
+func getAndResetTimer(name string) *time.Timer {
+
+	file, ok := ctx.FileMap[name]
+	if ok {
+		file.WaitTimer.Stop()
+		if file.BeemLock == true {
+			return nil
+		}
+	}
+
+	newTimer := time.NewTimer(InactiveDelay)
+	ctx.FileMap[name] = &File{
+		newTimer,
+		false,
+	}
+
+	return newTimer
+}
+
+func handleFileChange(watcher *fsnotify.Watcher) {
+	for {
+		select {
+		case event, ok := <-watcher.Events:
+
+			if !ok {
+				return
+			}
+
+			if event.Op&fsnotify.Write == fsnotify.Write || event.Op&fsnotify.Create == fsnotify.Create {
+				if stat, err := os.Stat(event.Name); err == nil && stat.IsDir() {
+					logrus.WithField("name", event.Name).Info("Created dir")
+					err = watcher.Add(event.Name)
+					if err != nil {
+						logrus.Fatal(err)
+					}
+				} else {
+					t := getAndResetTimer(event.Name)
+					if t != nil {
+						go handleFileInactive(t, event.Name)
+					}
+				}
+			} else if event.Op&fsnotify.Remove == fsnotify.Remove || event.Op&fsnotify.Rename == fsnotify.Rename {
+				if stat, err := os.Stat(event.Name); err == nil && stat.IsDir() {
+					logrus.WithField("name", event.Name).Info("Removed dir")
+					err = watcher.Remove(event.Name)
+					if err != nil {
+						logrus.Fatal(err)
+					}
+				} else if file, ok := ctx.FileMap[event.Name]; ok {
+					file.WaitTimer.Stop()
+					delete(ctx.FileMap, event.Name)
+				}
+			}
+
+			if event.Op&fsnotify.Chmod != fsnotify.Chmod {
+				logrus.WithFields(logrus.Fields{
+					"name": event.Name,
+					"op":   event.Op,
+				}).Trace("fsnotify")
+			}
+
+		case err, ok := <-watcher.Errors:
+			if !ok {
+				return
+			}
+			logrus.WithError(err).Error("error with Watcher")
+		}
+	}
+}
+
+func handleFileInactive(t *time.Timer, name string) {
+	<-t.C
+
+	ctx.FileMap[name].BeemLock = true
+
+	logrus.WithFields(logrus.Fields{
+		"name": name,
+	}).Infof("has been inactive for %s and will be beemed", InactiveDelay)
+
+	beemFile(name)
+}
+
+func beemFile(filename string) {
+
+	newName := moveToTempDir(filename)
+
+	name, args := ctx.BeemCommand(newName, filepath.Dir(filename))
+
+	cmd := exec.Command(name, args...)
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		logrus.WithField("name", filename).WithError(err).Error(string(out))
+	}
+
+	logrus.WithFields(logrus.Fields{
+		"name":    newName,
+		"command": name,
+		"args":    args,
+		"out":     string(out),
+	}).Trace("Executing beem command")
+
+	err = os.Remove(newName)
+	if err != nil && !os.IsNotExist(err) {
+		logrus.WithField("name", filename).Error(err)
+	}
+}