Support using both remote repos and a persistent clone

Author: bpineau

pkg/recorder/recorder.go

@@ -188,6 +188,10 @@ func (w *Listener) deleteObsoleteFiles() {
 	root := filepath.Clean(w.localDir)
 
 	err := afero.Walk(appFs, root, func(path string, info os.FileInfo, err error) error {
+		if info == nil {
+			return fmt.Errorf("can't stat %s", path)
+		}
+
 		if info.IsDir() {
 			return nil
 		}

pkg/store/git/git.go

@@ -163,6 +163,11 @@ func (s *Store) CloneOrInit() (err error) {
 		}
 	}
 
+	// One may both sync with a remote repos and keep a persistent local clone
+	if _, err := os.Stat(fmt.Sprintf("%s/.git/index", s.LocalDir)); err == nil {
+		return nil
+	}
+
 	if s.URL == "" {
 		err = s.Git("init", s.LocalDir)
 	} else {

pkg/store/git/git_test.go

@@ -124,8 +124,8 @@ func TestGit(t *testing.T) {
 	// test various failure modes
 
 	_, err = repo.Start()
-	if err == nil {
-		t.Error("Start/Clone on an existing repository should fail")
+	if err != nil {
+		t.Error("Start/Clone on an existing repository should not fail")
 	}
 
 	err = repo.Git("fortzob", "42")