add support for try_name in checks

In the Azure Pipelines configuration for rustc we have two different
pipelines for auto builds and try builds, thus two different check
names. This adds support for specifying a different check name for try
builds.

Author: pietroalbini

cfg.sample.toml

@@ -158,6 +158,10 @@ name = "Travis CI - Branch"
 #
 # String name of the Checks run.
 #name = ""
+#
+# String name of the Checks run used for try runs.
+# If the field is omitted the same name as the auto build will be used.
+#try_name = ""
 
 # Use buildbot for running tests
 #[repo.NAME.buildbot]

homu/main.py

@@ -1230,7 +1230,11 @@ def start_build(state, repo_cfgs, buildbot_slots, logger, db, git_cfg):
         if found_travis_context and len(builders) == 1:
             can_try_travis_exemption = True
     if 'checks' in repo_cfg:
-        builders += ['checks-' + key for key, value in repo_cfg['checks'].items() if 'name' in value]  # noqa
+        builders += [
+            'checks-' + key
+            for key, value in repo_cfg['checks'].items()
+            if 'name' in value or (state.try_ and 'try_name' in value)
+        ]
         only_status_builders = False
 
     if len(builders) == 0:

homu/server.py

@@ -604,7 +604,10 @@ def fail(err):
         checks_name = None
         if 'checks' in repo_cfg:
             for name, value in repo_cfg['checks'].items():
-                if 'name' in value and value['name'] == current_run_name:
+                if state.try_ and 'try_name' in value:
+                    if value['try_name'] == current_run_name:
+                        checks_name = name
+                elif 'name' in value and value['name'] == current_run_name:
                     checks_name = name
         if checks_name is None:
             return 'OK'