deps_convert.py

#!/usr/bin/env python
# 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.

# This is a TEMPORARY script to convert Mojo's DEPS file into a Jiri manifest.
# It is not a general purpose DEPS to manifest converter and intentionally omits
# or simplifies many of gclient's semantics. To run, invoke this script with the
# mojo DEPS file you wish to target as the only argument and pipe the output
# into the manifest you wish to populate, i.e.
#   python deps_convert.py /home/jamesr/mojo/src/DEPS > v2/default
#
# This is a python script since the DEPS file is a python object. It will go
# away when we stop using gclient for Mojo.

import sys

def print_project_header():
    print """<?xml version="1.0" encoding="UTF-8"?>
<!--- DO NOT EDIT BY HAND. This file is generated by deps_convert.py -->
<manifest label="default">
  <imports>
    <import name="buildtools"/>
    <import name="minimal"/>
  </imports>
  <hosts>
    <host name="gerrit"
        location="https://mojo-review.googlesource.com/"/>
    <host name="git"
          location="https://mojo.googlesource.com/">
       <githooks>
         <githook name="commit-msg" path="../git-hooks/add-gerrit-change-id" />
         <githook name="pre-push" path="../git-hooks/run-presubmit-checks" />
      </githooks>
    </host>
  </hosts>
  <projects>
    <!-- Mojo repositories -->
    <project name="mojo"
             path="src"
             remote="https://mojo.googlesource.com/mojo"/>
     <project name="depot_tools"
              path="depot_tools"
              remote="https://chromium.googlesource.com/chromium/tools/depot_tools.git"/>
     <project name="mojo-manifest"
              path="mojo-manifest"
              remote="https://mojo.googlesource.com/mojo-manifest"/>
    <!-- End of Mojo repositories -->

    <!-- Entries generated by deps_convert.py -->
"""

def print_project_footer():
    print """
    <!-- End of entries generated by deps_convert.py -->
  </projects>"""

def print_hooks_header():
    print """
  <hooks>
  <!-- Entries generated by deps_convert.py -->
"""

def print_hooks_footer():
    print """
  <!-- End of entries generated by deps_convert.py -->
  </hooks>
</manifest>"""

def strip_src_prefix(path):
    return path.split("src/")[-1]

def print_parsed_deps(deps):
    for path, remote_and_revision in deps.iteritems():
        remote, revision = remote_and_revision.split('@')
        name = strip_src_prefix(path).replace("/", "_")
        print """
    <project name="%s"
             remote="%s"
             path="%s"
             revision="%s"/>""" % (name, remote, path, revision)

def print_parsed_hooks(hooks):
    for hook in scope["hooks"]:
        name = hook["name"]
        action = hook["action"]
        if action[0] == "python":
            script = strip_src_prefix(action[1])
            print_python_action(name, "mojo", script, action[2:])
        elif action[0] == "src/tools/download_from_google_storage.py":
            print_download_action(name, action[1:])
        else:
            print "action %s not understood, action %s" % (name, action)
            sys.exit(1)

def print_python_action(name, project, script, args):
    print """    <hook name="%s"
      project="%s"
      interpreter="python"
      path="%s">""" % (name, project, script)
    for arg in args:
        print "      <arg>%s</arg>" % arg
    print "    </hook>"

def print_download_action(name, args):
    print_python_action(name, "mojo", "tools/download_from_google_storage.py", args)

scope = {}

def Var(key):
    return scope["vars"][key]

scope["Var"] = Var


def main():
    if len(sys.argv) != 2:
        print "must specify path to DEPS file"
        sys.exit(1)
    with open(sys.argv[1]) as deps_contents:
        d = deps_contents.read()

    exec(d, scope)
    print_project_header()
    print_parsed_deps(scope["deps"])
    print_project_footer()
    print_hooks_header()
    print_parsed_hooks(scope["hooks"])
    print_hooks_footer()

if __name__ == '__main__':
    sys.exit(main())