Add fetch recipe for fletch

R=erikcorry@google.com, iannucci@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1317833004

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@296978 0039d316-1c4b-4281-b951-d872f2087c98

recipes/fletch.py

+# Copyright 2015 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 sys
+
+import recipe_util  # pylint: disable=F0401
+
+# This class doesn't need an __init__ method, so we disable the warning
+# pylint: disable=W0232
+class Fletch(recipe_util.Recipe):
+  """Basic Recipe class for Fletch."""
+
+  @staticmethod
+  def fetch_spec(props):
+    url = 'https://github.com/dart-lang/fletch.git'
+    solution = {
+      'name'   :'fletch',
+      'url'    : url,
+      'deps_file': 'DEPS',
+      'managed'   : False,
+      'custom_deps': {},
+      'safesync_url': '',
+    }
+    spec = {
+      'solutions': [solution],
+    }
+    if props.get('target_os'):
+      spec['target_os'] = props['target_os'].split(',')
+    return {
+      'type': 'gclient_git',
+      'gclient_git_spec': spec,
+    }
+
+  @staticmethod
+  def expected_root(_props):
+    return 'fletch'
+
+
+def main(argv=None):
+  return Fletch().handle_args(argv)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))