allow to break the commands cycle with return code 2

Author: Vladimir Kotal

tools/sync/commands.py

@@ -70,6 +70,8 @@ def run(self):
         """
         Run the sequence of commands and capture their output and return code.
         First command that returns code other than 0 terminates the sequence.
+        If the command has return code 2, the sequence will be terminated
+        however it will not be treated as error.
         """
 
         for command in self.commands:
@@ -81,9 +83,15 @@ def run(self):
             self.outputs[str(cmd)] = cmd.getoutput()
 
             # If a command fails, terminate the sequence of commands.
-            if cmd.getretcode() != 0:
-                self.logger.debug("command {} failed, breaking".format(cmd))
-                self.failed = True
+            retcode = cmd.getretcode()
+            if retcode != 0:
+                if retcode == 2:
+                    self.logger.info("command '{}' requested break".
+                                     format(cmd))
+                else:
+                    self.logger.info("command '{}' failed with code {}, "
+                                     "breaking".format(cmd, retcode))
+                    self.failed = True
                 break
 
     def check(self, ignore_errors):

tools/sync/mirror.py

@@ -195,7 +195,7 @@
         if project_config.get('disabled'):
             logger.info("Project {} disabled, exiting".
                         format(args.project))
-            sys.exit(0)
+            sys.exit(2)
 
     lock = filelock.FileLock(os.path.join(tempfile.gettempdir(),
                              args.project + "-mirror.lock"))