src/trigger.py: Switch key data structure for main loop

Build configurations list will not be known up front when external
configuration files are enabled in Maestro. Switching main loop to
iterate over monitored trees will allow obtaining this information right
before its use.

Signed-off-by: Paweł Wieczorek <pawiecz@collabora.com>

Author: pawiecz

src/trigger.py

@@ -26,6 +26,7 @@ class Trigger(Service):
     def __init__(self, configs, args):
         super().__init__(configs, args, 'trigger')
         self._build_configs = configs['build_configs']
+        self._trees = configs['trees']
         self._current_user = self._api.user.whoami()
 
     def _log_revision(self, message, build_config, head_commit):
@@ -134,9 +135,11 @@ def _run_trigger(self, build_config, force, timeout, trees):
         except Exception as ex:
             self.traceback(ex)
 
-    def _iterate_build_configs(self, force, timeout, trees):
-        for name, config in self._build_configs.items():
-            self._run_trigger(config, force, timeout, trees)
+    def _iterate_trees(self, force, timeout, trees):
+        for tree in self._trees.keys():
+            build_configs = {name: config for name, config in self._build_configs.items() if config.tree.name == tree}
+            for name, config in build_configs.items():
+                self._run_trigger(config, force, timeout, trees)
 
     def _setup(self, args):
         return {
@@ -159,7 +162,7 @@ def _run(self, ctx):
             time.sleep(startup_delay)
 
         while True:
-            self._iterate_build_configs(force, timeout, trees)
+            self._iterate_trees(force, timeout, trees)
             if poll_period:
                 self.log.info(f"Sleeping for {poll_period}s")
                 time.sleep(poll_period)