fix issue #2 again

LeaderF couldn't work if an directory parameter was supplied to the
LeaderF command.

autoload/leaderf/fileExpl.py

@@ -148,8 +148,13 @@ def _refresh(self):
                         cacheFile.write(line + '\n')
 
     def getContent(self, *args, **kwargs):
-        dir = os.getcwd() if len(args) == 0 else args[0]
-        dir = os.path.abspath(dir)
+        if len(args) > 0:
+            if os.path.exists(args[0]):
+                os.chdir(args[0])
+            else:
+                vim.command("echohl ErrorMsg | redraw | echon 'Unknown directory `%s`' | echohl NONE" % args[0])
+                return None
+        dir = os.getcwd()
         if vim.eval("g:Lf_UseMemoryCache") == 0 or dir != self._curDir:
             self._curDir = dir
             self._content = self._getFileList(dir)

autoload/leaderf/manager.py

@@ -368,10 +368,6 @@ def accept(self, mode = ''):
             self._accept(file, mode)
 
     def quit(self):
-        if self._autochdir == 1:
-            cwd = os.getcwd()
-            vim.command("set autochdir")    # I think vim has a bug here
-            os.chdir(cwd)
         self._cli.clear()
         self._selections.clear()
         if self._winPos != 0 and len(vim.windows) > 1:
@@ -386,6 +382,10 @@ def quit(self):
             vim.command("call getchar(0) | redraw | echo")
         else:
             vim.command("call getchar(0)")
+        if self._autochdir == 1:
+            cwd = os.getcwd()
+            vim.command("set autochdir")    # I think vim has a bug here
+            os.chdir(cwd)
 
     def refresh(self, content = None):
         rContent = self._getExplorer().getFreshContent()
@@ -424,10 +424,12 @@ def addSelections(self):
 
     def startExplorer(self, *args, **kwargs):
         self._cli.setFullPathFeature(self._getExplorer().supportsFullPath())
-        self._gotoBuffer()
         vim.command("let g:Lf_statusline_function = '%s'" % self._getExplorer().getStlFunction())
         vim.command("echohl WarningMsg | redraw | echo ' searching ...' | echohl NONE")
         content = self._getExplorer().getContent(*args, **kwargs)
+        if content is None:
+            return
+        self._gotoBuffer()
         vim.command("let g:Lf_statusline_curDir = '%s'" % self._getExplorer().getStlCurDir())
         self.startExplAction(content)