Presubmit: Always run recipe test and gen_tasks test on commit

infra/bots/recipes/swarm_presubmit.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 
 # Recipe which runs the Skia presubmit.
 
 
 DEPS = [
+  'build/file',
   'core',
   'depot_tools/depot_tools',
   'recipe_engine/path',
   'recipe_engine/properties',
   'recipe_engine/step',
   'recipe_engine/uuid',
   'vars',
 ]
 
 
 def RunSteps(api):
   api.vars.setup()
   api.core.checkout_steps()
 
+  # Create a local GOPATH.
+  gopath = api.vars.slave_dir.join('gopath')
+  if not api.path.exists(gopath):
+    api.file.makedirs('gopath', gopath)
+
   api.step('git status',
            cmd=['git', 'status'],
            cwd=api.vars.skia_dir)
 
   depot_tools_path = api.depot_tools.package_repo_resource()
   script = depot_tools_path.join('presubmit_support.py')
-  env = {'PATH': api.path.pathsep.join([str(depot_tools_path), '%(PATH)s'])}
+  env = {
+      'PATH': api.path.pathsep.join([str(depot_tools_path), '%(PATH)s']),
+      'GOPATH': str(gopath),
+  }
   # TODO(borenet): --upstream=HEAD^ is a hack to force presubmit_support to
   # find a diff. Otherwise, it quits early with:
   #  "Warning, no PRESUBMIT.py found."
   api.step('presubmit',
            cmd=[script, '--commit', '--upstream=HEAD^', '-v', '-v'],
            cwd=api.vars.skia_dir,
            env=env)
 
 
 def GenTests(api):
   yield (
       api.test('presubmit') +
       api.properties(buildername='Housekeeper-PerCommit-Presubmit',
                      mastername='client.skia.fyi',
                      slavename='dummy-slave',
                      buildnumber=5,
                      revision='abc123',
                      path_config='kitchen',
                      swarm_out_dir='[SWARM_OUT_DIR]')
   )