Add step generator protocol, remove annotated_checkout, remove script.

scripts/slave/recipes/run_presubmit.py

 # Copyright (c) 2013 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.
 
-def GetFactoryProperties(api, factory_properties, build_properties):
+def GetSteps(api, factory_properties, build_properties):
   # TODO(iannucci): Pass the build repo info directly via build_properties
   repo_name = factory_properties.get('repo_name')
   steps = api.Steps(build_properties)
 
-  spec = steps.gclient_common_spec(repo_name)
-
-  git_steps = []
-  if spec['solutions'][0]['url'].endswith('.git'):
-    email = 'commit-bot@chromium.org'
-    git_steps = [
-      steps.git_step('config', 'user.email', email),
-      steps.git_step('config', 'user.name', 'The Commit Bot'),
-      steps.git_step('clean', '-xfq'),
-    ]
+  def git_steps(step_history, _failure):
+    spec = step_history['gclient setup'].json_data['CheckoutSpec']
+    if spec['solutions'][0]['url'].endswith('.git'):
+      seed_steps = ['git config user.email', 'git config user.name',
+                    'git clean']
+      yield steps.git('config', 'user.email', 'commit-bot@chromium.org',
+                      seed_steps=seed_steps)
+      yield steps.git('config', 'user.name', 'The Commit Bot')
+      yield steps.git('clean', '-xfq')
 
   root = build_properties.get('root', '')
   # FIXME: Rietveld passes the blink path as src/third_party/WebKit
   #        so we have to strip the src bit off before passing to
   #        api.checkout_path. :(
   if root.startswith('src'):
     root = root[3:].lstrip('/')
 
   # FIXME: Remove the blink_bare repository type.
   if repo_name == 'blink_bare':
     root = ''
 
-  return {
-    'checkout': 'gclient',
-    'gclient_spec': spec,
-    'steps': git_steps + [
-      steps.apply_issue_step(root),
-      steps.step('presubmit', [
-        api.depot_tools_path('presubmit_support.py'),
-        '--root', api.checkout_path(root),
-        '--commit',
-        '--verbose', '--verbose',
-        '--issue', build_properties['issue'],
-        '--patchset', build_properties['patchset'],
-        '--skip_canned', 'CheckRietveldTryJobExecution',
-        '--skip_canned', 'CheckTreeIsOpen',
-        '--skip_canned', 'CheckBuildbotPendingBuilds',
-        '--rietveld_url', build_properties['rietveld'],
-        '--rietveld_email', '',  # activates anonymous mode
-        '--rietveld_fetch'])
-    ]
-  }
+  return (
+    steps.gclient_checkout(repo_name),
+    git_steps,
+    steps.apply_issue(root),
+    steps.step('presubmit', [
+      api.depot_tools_path('presubmit_support.py'),
+      '--root', api.checkout_path(root),
+      '--commit',
+      '--verbose', '--verbose',
+      '--issue', build_properties['issue'],
+      '--patchset', build_properties['patchset'],
+      '--skip_canned', 'CheckRietveldTryJobExecution',
+      '--skip_canned', 'CheckTreeIsOpen',
+      '--skip_canned', 'CheckBuildbotPendingBuilds',
+      '--rietveld_url', build_properties['rietveld'],
+      '--rietveld_email', '',  # activates anonymous mode
+      '--rietveld_fetch'])
+  )