Don't start repo with non-directory root (fixes #276)

gui/index.html

@@ -144,6 +144,10 @@
                         <th><span class="glyphicon glyphicon-folder-open"></span>&emsp;Folder</th>
                         <td class="text-right">{{repo.Directory}}</td>
                       </tr>
+                      <tr ng-if="model[repo.ID].invalid">
+                        <th><span class="glyphicon glyphicon-warning-sign"></span>&emsp;Error</th>
+                        <td class="text-right">{{model[repo.ID].invalid}}</td>
+                      </tr>
                       <tr>
                         <th><span class="glyphicon glyphicon-comment"></span>&emsp;Synchronization</th>
                         <td class="text-right">{{repoStatus(repo.ID)}}</td>

model/model.go

@@ -628,7 +628,10 @@ func (m *Model) ScanRepos() {
 	for _, repo := range repos {
 		repo := repo
 		go func() {
-			m.ScanRepo(repo)
+			err := m.ScanRepo(repo)
+			if err != nil {
+				invalidateRepo(m.cfg, repo, err)
+			}
 			wg.Done()
 		}()
 	}

scanner/walk.go

@@ -284,10 +284,12 @@ func (w *Walker) ignoreFile(patterns map[string][]string, file string) bool {
 }
 
 func checkDir(dir string) error {
-	if info, err := os.Stat(dir); err != nil {
+	if info, err := os.Lstat(dir); err != nil {
 		return err
 	} else if !info.IsDir() {
 		return errors.New(dir + ": not a directory")
+	} else if debug {
+		l.Debugln("checkDir", dir, info)
 	}
 	return nil
 }