devserver: remove temp directory for storing devserver codes.

Currently, when devserver tries to transfer devserver package, it first copies
the codes without some unneccesary files to a temp directory, then transfer the
whole package to device. This procedure will leave a temp directory on
devserver and won't be deleted after the provision succeeds or fails.

This CL helps the devserver to pass the temp directory to the auto_updater, and
then delete the directory after provision is finished.

BUG=chromium:654953
TEST=run repair with local autotest and devserver.

Change-Id: I4d0bd4516923a3bd41c455175ca36093e24266c1
Reviewed-on: https://chromium-review.googlesource.com/399989
Commit-Ready: Xixuan Wu <xixuan@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Allen Li <ayatane@chromium.org>
diff --git a/devserver.py b/devserver.py
index ea0d70b..95b498b 100755
--- a/devserver.py
+++ b/devserver.py
@@ -41,7 +41,6 @@
 
 from __future__ import print_function
 
-import glob
 import json
 import optparse
 import os
@@ -917,7 +916,7 @@
 
   @cherrypy.expose
   def handler_cleanup(self, **kwargs):
-    """Clean track status log for CrOS auto-update process.
+    """Clean track status log and temp directory for CrOS auto-update process.
 
     Args:
       kwargs:
@@ -933,6 +932,7 @@
     host_name = kwargs['host_name']
     pid = kwargs['pid']
     cros_update_progress.DelTrackStatusFile(host_name, pid)
+    cros_update_progress.DelAUTempDirectory(host_name, pid)
 
   @cherrypy.expose
   def kill_au_proc(self, **kwargs):
@@ -949,8 +949,8 @@
       raise common_util.DevServerHTTPError((KEY_ERROR_MSG % 'host_name'))
 
     host_name = kwargs['host_name']
-    file_filter = cros_update_progress.TRACK_LOG_FILE_PATH % (host_name, '*')
-    track_log_list = glob.glob(file_filter)
+    track_log_list = cros_update_progress.GetAllTrackStatusFileByHostName(
+        host_name)
     for log in track_log_list:
       # The track log's full path is: path/host_name_pid.log
       # Use splitext to remove file extension, then parse pid from the
@@ -984,11 +984,12 @@
 
     host_name = kwargs['host_name']
     pid = kwargs['pid']
+
+    # Fetch the execute log recorded by cros_update_progress.
     au_log = cros_update_progress.ReadExecuteLogFile(host_name, pid)
     cros_update_progress.DelExecuteLogFile(host_name, pid)
     return au_log
 
-
   @cherrypy.expose
   def locate_file(self, **kwargs):
     """Get the path to the given file name.