[fenix] Split android-test build job into 2 so it can be signed with 2 different keys (https://github.com/mozilla-mobile/fenix/pull/6779)

taskcluster/ci/build/kind.yml

@@ -45,7 +45,7 @@ jobs:
         treeherder:
             symbol: debug(B)
 
-    android-test:
+    android-test-debug:
         attributes:
             code-review: true
         run-on-tasks-for: [github-pull-request, github-push]
@@ -56,7 +56,26 @@ jobs:
             # 2 differences here: "androidTest/" is added and "{gradle_build_type}" is forced to "debug"
             path: '/builds/worker/checkouts/src/app/build/outputs/apk/androidTest/{geckoview_engine}/debug/{fileName}'
         treeherder:
-            symbol: androidTest(B)
+            symbol: debug(Bat)
+
+    # android-test-nightly, while still being a debug build, is meant to be signed with the nightly
+    # key. The Firebase testing infrastructure requires both the androidTest APK and the APK under
+    # test to be signed with the same key. Thus, the nightly APK being signed with nightly means
+    # we need an androidTest APK with the same signature.
+    #
+    # TODO: See if we can tweak the signing kind to make 2 signing jobs out of a single `android-test`
+    # job.
+    android-test-nightly:
+        attributes:
+            nightly: true
+        run:
+            geckoview-engine: geckoNightly
+            gradle-build-type: androidTest
+        apk-artifact-template:
+            # 2 differences here: "androidTest/" is added and "{gradle_build_type}" is forced to "debug"
+            path: '/builds/worker/checkouts/src/app/build/outputs/apk/androidTest/{geckoview_engine}/debug/{fileName}'
+        treeherder:
+            symbol: nightly(Bat)
 
     performance-test:
         run:

taskcluster/ci/config.yml

@@ -2,7 +2,6 @@
 trust-domain: mobile
 treeherder:
     group-names:
-        'androidTest': 'Tasks related to the androidTest APK'
         'beta': 'Nightly-related tasks'
         'debug': 'Builds made for testing'
         'forPerformanceTest': 'Builds made for Raptor and other performance tests'

taskcluster/ci/signing/kind.yml

@@ -16,7 +16,7 @@ job-template:
     description: Sign Fenix
     worker-type:
         by-build-type:
-            (fennec-production|nightly|beta|production):
+            (fennec-production|nightly|beta|production|android-test-nightly):
                 by-level:
                     '3': signing
                     default: dep-signing
@@ -32,6 +32,10 @@ job-template:
                     by-level:
                         '3': nightly-signing
                         default: dep-signing
+                android-test-nightly:
+                    by-level:
+                        '3': nightly-signing
+                        default: dep-signing
                 performance-test: dep-signing
                 beta:
                     by-level:
@@ -49,7 +53,10 @@ job-template:
             default: {}
     run-on-tasks-for: []
     treeherder:
-        job-symbol: Bs
+        job-symbol:
+            by-build-type:
+                android-test.+: Bats
+                default: Bs
         kind: build
         platform: android-all/opt
         tier: 2

taskcluster/ci/ui-test/kind.yml

@@ -10,13 +10,13 @@ transforms:
     - taskgraph.transforms.task:transforms
 
 jobs:
-    x86:
+    x86-debug:
         attributes:
             build-type: debug
             code-review: true
         dependencies:
             signing: signing-debug
-            signing-android-test: signing-android-test
+            signing-android-test: signing-android-test-debug
         description: Test Fenix
         include-pull-request-number: true
         run-on-tasks-for: [github-pull-request, github-push]

taskcluster/fenix_taskgraph/transforms/single_dep.py

@@ -8,6 +8,7 @@ Apply some defaults and minor modifications to the single_dep jobs.
 from __future__ import absolute_import, print_function, unicode_literals
 
 from taskgraph.transforms.base import TransformSequence
+from taskgraph.util.schema import resolve_keyed_by
 from taskgraph.util.treeherder import inherit_treeherder_from_dep, join_symbol
 
 
@@ -32,6 +33,21 @@ def _get_dependent_job_name_without_its_kind(dependent_job):
     return dependent_job.label[len(dependent_job.kind) + 1:]
 
 
+@transforms.add
+def resolve_keys(config, tasks):
+    for task in tasks:
+        resolve_keyed_by(
+            task,
+            "treeherder.job-symbol",
+            item_name=task["name"],
+            **{
+                'build-type': task["attributes"]["build-type"],
+                'level': config.params["level"],
+            }
+        )
+        yield task
+
+
 @transforms.add
 def build_upstream_artifacts(config, tasks):
     for task in tasks: