Fix issue with stale cache from bad builds.

We always want to re-build packages we are revving, however, if the last
build succeeds in building but fails tests, we have a bad local cache that
has revved packages.  This avoids this issue by working on all packages we
are revving.

Change-Id: I3bd7463a4090b1f007d09be81bdf65657bd9c3f3

BUG=7589
TEST=Ran it with cbuildbot.

Review URL: http://codereview.chromium.org/3745006

bin/cbuildbot.py

@@ -345,6 +345,14 @@ def _UprevCleanup(buildroot, error_ok=False):
               '--tracking_branch="cros/master"', 'clean'],
              cwd=cwd, error_ok=error_ok)
 
+  workon_packages = RunCommand(['./cros_workon', 'list'],
+                               enter_chroot=True, cwd=cwd, error_ok=error_ok,
+                               redirect_stdout=True)
+  if workon_packages:
+    Info('Cleaning up workon packages %s' % workon_packages)
+    RunCommand(['./cros_workon', 'stop'] + workon_packages.split(),
+               enter_chroot=True, cwd=cwd, error_ok=False)
+
 
 def _UprevPush(buildroot):
   """Pushes uprev changes to the main line."""
@@ -439,7 +447,6 @@ def main():
         # Master bot needs to check if the other slaves completed.
         if cbuildbot_comm.HaveSlavesCompleted(config):
           _UprevPush(buildroot)
-          _UprevCleanup(buildroot)
         else:
           # At least one of the slaves failed or we timed out.
           _UprevCleanup(buildroot)
@@ -449,7 +456,7 @@ def main():
         if buildconfig['important']:
           cbuildbot_comm.PublishStatus(cbuildbot_comm.STATUS_BUILD_COMPLETE)
 
-        _UprevCleanup(buildroot)
+      _UprevCleanup(buildroot)
   except:
     # Send failure to master bot.
     if not buildconfig['master'] and buildconfig['important']:

cros_mark_all_as_stable

@@ -99,6 +99,8 @@ if [ -n "${PACKAGE_LIST}" ] ; then
   ./cros_mark_as_stable --board ${FLAGS_board} -p "${PACKAGE_LIST}" \
     -i "${COMMIT_ID_LIST}" -t ${FLAGS_tracking_branch} commit  || \
     die "Could not mark all packages as stable"
+
+  ./cros_workon start ${PACKAGE_LIST}
 else
   info "No candidate packages to be marked"
 fi

cros_mark_as_stable.py

@@ -123,7 +123,8 @@ def _PrintUsageAndDie(error_message=''):
     command_usage += '  %s: %s\n' % (command, _COMMAND_DICTIONARY[command])
   commands_str = '|'.join(commands)
   Warning('Usage: %s FLAGS [%s]\n\n%s\nFlags:%s' % (sys.argv[0], commands_str,
-                                                  command_usage, gflags.FLAGS))
+                                                    command_usage,
+                                                    gflags.FLAGS))
   if error_message:
     Die(error_message)
   else: