Remove layout option, adapt -t option accordingly

The layout option no longer makes much sense since config repos are
where layouts come from now. The -t option is still useful for testing
the static config, and may one day be expanded to fully load all config
repos and test them.

There were also chunks left in the scheduler from the old way.

Change-Id: I0a0b521b3ed20762e1cd60a042daa1f8c4f57a65
diff --git a/zuul/cmd/scheduler.py b/zuul/cmd/scheduler.py
index e5497dc..0abab47 100755
--- a/zuul/cmd/scheduler.py
+++ b/zuul/cmd/scheduler.py
@@ -44,15 +44,11 @@
         parser = argparse.ArgumentParser(description='Project gating system.')
         parser.add_argument('-c', dest='config',
                             help='specify the config file')
-        parser.add_argument('-l', dest='layout',
-                            help='specify the layout file')
         parser.add_argument('-d', dest='nodaemon', action='store_true',
                             help='do not run as a daemon')
-        parser.add_argument('-t', dest='validate', nargs='?', const=True,
-                            metavar='JOB_LIST',
-                            help='validate layout file syntax (optionally '
-                            'providing the path to a file with a list of '
-                            'available job names)')
+        parser.add_argument('-t', dest='validate', action='store_true',
+                            help='validate config file syntax (Does not'
+                            'validate config repo validity)')
         parser.add_argument('--version', dest='version', action='version',
                             version=self._get_version(),
                             help='show zuul version')
@@ -79,38 +75,19 @@
         self.stop_gear_server()
         os._exit(0)
 
-    def test_config(self, job_list_path):
+    def test_config(self):
         # See comment at top of file about zuul imports
         import zuul.scheduler
-        import zuul.launcher.gearman
-        import zuul.trigger.gerrit
+        import zuul.launcher.client
 
         logging.basicConfig(level=logging.DEBUG)
-        self.sched = zuul.scheduler.Scheduler(self.config,
-                                              testonly=True)
-        self.configure_connections()
-        self.sched.registerConnections(self.connections, load=False)
-        layout = self.sched.testConfig(self.config.get('zuul',
-                                                       'layout_config'),
-                                       self.connections)
-        if not job_list_path:
-            return False
-
-        failure = False
-        path = os.path.expanduser(job_list_path)
-        if not os.path.exists(path):
-            raise Exception("Unable to find job list: %s" % path)
-        jobs = set()
-        jobs.add('noop')
-        for line in open(path):
-            v = line.strip()
-            if v:
-                jobs.add(v)
-        for job in sorted(layout.jobs):
-            if job not in jobs:
-                print("FAILURE: Job %s not defined" % job)
-                failure = True
-        return failure
+        try:
+            self.sched = zuul.scheduler.Scheduler(self.config,
+                                                  testonly=True)
+        except Exception as e:
+            self.log.error("%s" % e)
+            return -1
+        return 0
 
     def start_gear_server(self):
         pipe_read, pipe_write = os.pipe()
@@ -223,14 +200,8 @@
 
     scheduler.read_config()
 
-    if scheduler.args.layout:
-        scheduler.config.set('zuul', 'layout_config', scheduler.args.layout)
-
     if scheduler.args.validate:
-        path = scheduler.args.validate
-        if path is True:
-            path = None
-        sys.exit(scheduler.test_config(path))
+        sys.exit(scheduler.test_config())
 
     if scheduler.config.has_option('zuul', 'pidfile'):
         pid_fn = os.path.expanduser(scheduler.config.get('zuul', 'pidfile'))
diff --git a/zuul/scheduler.py b/zuul/scheduler.py
index 6fbac9b..e1630ae 100644
--- a/zuul/scheduler.py
+++ b/zuul/scheduler.py
@@ -293,11 +293,6 @@
         self.stopConnections()
         self.wake_event.set()
 
-    def testConfig(self, config_path, connections):
-        # Take the list of set up connections directly here rather than with
-        # registerConnections as we don't want to do the onLoad event yet.
-        return self._parseConfig(config_path, connections)
-
     def registerConnections(self, connections, load=True):
         # load: whether or not to trigger the onLoad for the connection. This
         # is useful for not doing a full load during layout validation.