Bug 1390968: add a py(3) job; r=gps

MozReview-Commit-ID: 1BkOEvPKjSD

--HG--
extra : rebase_source : 5b330030b5961cf8557a33346c2b8b7208aaf99c

taskcluster/ci/source-test/python-tests.yml

@@ -148,3 +148,23 @@ mozlint:
         files-changed:
             - 'python/mozlint/**'
             - 'python/mach_commands.py'
+
+python3:
+    description: regression tests for python3 compatibility
+    platform: linux64/opt
+    treeherder:
+        symbol: py(3)
+        kind: test
+        tier: 2
+    worker-type: aws-provisioner-v1/gecko-t-linux-large
+    worker:
+        docker-image: {in-tree: "lint"}
+        max-run-time: 3600
+    run:
+        using: run-task
+        # this will evolve as we get closer and closer to python 3 compatibility. It may
+        # eventually be a mach command or shell script.
+        command: python3 -mcompileall python/
+    when:
+        files-changed:
+            - 'python/**/*.py'

taskcluster/docker/lint/system-setup.sh

@@ -15,6 +15,8 @@ apt_packages+=('locales')
 apt_packages+=('git')
 apt_packages+=('python')
 apt_packages+=('python-pip')
+apt_packages+=('python3')
+apt_packages+=('python3-pip')
 apt_packages+=('sudo')
 apt_packages+=('wget')
 apt_packages+=('xz-utils')