made git pull thread safe, thanks Andrew

VERSION

@@ -1 +1 @@
-Version 2.00.0 (2012-07-28 21:32:56) dev
+Version 2.00.0 (2012-07-28 22:37:15) dev

applications/admin/controllers/default.py

@@ -1697,8 +1697,7 @@ def git_push():
         try:
             repo = Repo(os.path.join(apath(r=request),app))
             index = repo.index
-            os.chdir(os.path.join(apath(r=request),app))
-            index.add('*')
+            index.add([apath(r=request)+app+'/*'])
             new_commit = index.commit(form.vars.changelog)
             origin = repo.remotes.origin
             origin.push()
@@ -1711,6 +1710,5 @@ def git_push():
             logging.error("Unexpected error:", sys.exc_info()[0])
             session.flash = T("Push failed, git exited abnormally. See logs for details.")
             redirect(URL('site'))
-    os.chdir(apath(r=request))
     return dict(app=app,form=form)