Bug 1333424 - Implicitly add relevant taskcluster configuration files to 'files-changed' attribute, r=dustin

This will ensure that if the taskgraph module, taskcluster configs related to a task or docker image related
to a task are modified, the task will run.

MozReview-Commit-ID: 1H6LnYsxxpc

--HG--
extra : rebase_source : 51aae8aa445be83f64d0a381cee01a0b5861b41a

taskcluster/ci/android-stuff/kind.yml

@@ -61,7 +61,6 @@ jobs:
         when:
             files-changed:
               - "mobile/android/config/**"
-              - "taskcluster/docker/android-gradle-build/**"
               - "testing/mozharness/configs/builds/releng_sub_android_configs/*gradle_dependencies.py"
               - "**/*.gradle"
 

taskcluster/ci/source-check/mozlint.yml

@@ -40,7 +40,6 @@ mozlint-eslint/opt:
             # Other misc lint related files.
             - 'python/mozlint/**'
             - 'tools/lint/**'
-            - 'taskcluster/docker/lint/**'
 
 mozlint-flake8/opt:
     description: flake8 run over the gecko codebase
@@ -66,7 +65,6 @@ mozlint-flake8/opt:
             - '**/.flake8'
             - 'python/mozlint/**'
             - 'tools/lint/**'
-            - 'taskcluster/docker/lint/**'
 
 wptlint-gecko/opt:
     description: web-platform-tests linter
@@ -94,4 +92,3 @@ wptlint-gecko/opt:
             - 'testing/web-platform/mozilla/meta/MANIFEST.json'
             - 'python/mozlint/**'
             - 'tools/lint/**'
-            - 'taskcluster/docker/lint/**'

taskcluster/taskgraph/transforms/task.py

@@ -741,6 +741,25 @@ def add_index_routes(config, tasks):
         yield task
 
 
+@transforms.add
+def add_files_changed(config, tasks):
+    for task in tasks:
+        if 'files-changed' not in task.get('when', {}):
+            yield task
+            continue
+
+        task['when']['files-changed'].extend([
+            '{}/**'.format(config.path),
+            'taskcluster/taskgraph/**',
+        ])
+
+        if 'in-tree' in task['worker'].get('docker-image', {}):
+            task['when']['files-changed'].append('taskcluster/docker/{}/**'.format(
+                task['worker']['docker-image']['in-tree']))
+
+        yield task
+
+
 @transforms.add
 def build_task(config, tasks):
     for task in tasks: