depot_tools: import bot_update gclient git rietveld tryserver recipe modules (reland #1)

recipe_modules/gclient/test_api.py

+# Copyright 2014 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.
+
+import hashlib
+
+from recipe_engine import recipe_test_api
+
+class GclientTestApi(recipe_test_api.RecipeTestApi):
+  def output_json(self, projects, git_mode=False):
+    """Deterministically synthesize json.output test data for gclient's
+    --output-json option.
+
+    Args:
+      projects - a list of project paths (e.g. ['src', 'src/dependency'])
+      git_mode - Return git hashes instead of svn revs.
+    """
+    # TODO(iannucci): Account for parent_got_revision_mapping. Right now the
+    # synthesized json output from this method will always use
+    # gen_revision(project), but if parent_got_revision and its ilk are
+    # specified, we should use those values instead.
+    return self.m.json.output({
+      'solutions': dict(
+        (p+'/', {'revision': self.gen_revision(p, git_mode)})
+        for p in projects
+      )
+    })
+
+  @staticmethod
+  def gen_revision(project, GIT_MODE):
+    """Hash project to bogus deterministic revision values."""
+    h = hashlib.sha1(project)
+    if GIT_MODE:
+      return h.hexdigest()
+    else:
+      import struct
+      return struct.unpack('!I', h.digest()[:4])[0] % 300000