Add option to run cron once

issue9475
review307931002

CHANGELOG

@@ -1,3 +1,4 @@
+* Add option to run cron once
 * Add defaults option to route
 * Add escape_wildcard in tools
 * Add option to ensure emails are sent

bin/trytond-cron

@@ -12,7 +12,7 @@ if os.path.isdir(DIR):
 import trytond.commandline as commandline
 from trytond.config import config
 
-parser = commandline.get_parser_daemon()
+parser = commandline.get_parser_cron()
 options = parser.parse_args()
 config.update_etc(options.configfile)
 commandline.config_log(options)

doc/topics/start_server.rst

@@ -54,6 +54,8 @@ run the cron server with this command line::
 
 The server will wake up every minutes and preform the scheduled actions defined
 in the `database`.
+You can also launch the command every few minutes from a scheduler with the
+option `--once`.
 
 Worker service
 ==============

trytond/commandline.py

@@ -60,6 +60,13 @@ def get_parser_worker():
     return parser
 
 
+def get_parser_cron():
+    parser = get_parser_daemon()
+    parser.add_argument("-1", "--once", dest='once', action='store_true',
+        help="run pending tasks and halt")
+    return parser
+
+
 def get_parser_admin():
     parser = get_parser()
 

trytond/cron.py

@@ -35,4 +35,8 @@ def run(options):
             logger.info('start thread for "%s"', db_name)
             thread.start()
             threads[db_name] = thread
+        if options.once:
+            break
         time.sleep(60)
+    for thread in threads.values():
+        thread.join()