Add a roll_versions.py script and roll versions once.

sky/tools/roll_versions.py

Index: sky/tools/roll_versions.py
diff --git a/sky/tools/roll_versions.py b/sky/tools/roll_versions.py
new file mode 100755
index 0000000000000000000000000000000000000000..0108cca01565ab86e134d8b9ea9babefade710fd
--- /dev/null
+++ b/sky/tools/roll_versions.py
@@ -0,0 +1,93 @@
+#!/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.
+
+import yaml
+import xml.etree.ElementTree as ET
+
+PUBSPECS = [
+    'sky/sdk/pubspec.yaml',
+    'mojo/public/dart/pubspec.yaml',
+    'mojo/dart/mojo_services/pubspec.yaml',
+    'mojo/dart/mojom/pubspec.yaml',
+]
+
+MANIFESTS = [
+    'sky/apk/demo/AndroidManifest.xml',
+]
+
+MANIFEST_PREFACE = '''<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+ -->
+'''
+
+
+def increment_version(version):
+    pieces = version.split('.')
+    pieces[-1] = str(int(pieces[-1]) + 1)
+    return '.'.join(pieces)
+
+
+def sort_dict(unsorted):
+    sorted_dict = collections.OrderedDict()
+    for key in sorted(unsorted.keys()):
+        sorted_dict[key] = unsorted[key]
+    return sorted_dict
+
+
+def update_pubspec(pubspec):
+    # TODO(eseidel): This does not prserve any manual sort-order of the yaml.
+    with open(pubspec, 'r') as stream:
+        spec = yaml.load(stream)
+        old_version = spec['version']
+        spec['version'] = increment_version(old_version)
+        print "%20s  %6s => %6s" % (spec['name'], old_version, spec['version'])
+
+    with open(pubspec, 'w') as stream:
+        yaml.dump(spec, stream=stream, default_flow_style=False)
+
+
+def prepend_to_file(to_prepend, filepath):
+    with open(filepath, 'r+') as f:
+        content = f.read()
+        f.seek(0, 0)
+        f.write(to_prepend + content)
+
+
+def update_manifest(manifest):
+    VERSION_CODE = '{http://schemas.android.com/apk/res/android}versionCode'
+    VERSION_NAME = '{http://schemas.android.com/apk/res/android}versionName'
+    tree = ET.parse(manifest)
+    root = tree.getroot()
+    package_name = root.get('package')
+    old_code = root.get(VERSION_CODE)
+    old_name = root.get(VERSION_NAME)
+    root.set(VERSION_CODE, increment_version(old_code))
+    root.set(VERSION_NAME, increment_version(old_name))
+    print "%20s  %6s (%s) => %6s (%s)" % (package_name, old_name, old_code,
+        root.get(VERSION_NAME), root.get(VERSION_CODE))
+    # TODO(eseidel): This isn't smart enough to wrap/intent multi-attribute
+    # elements like <manifest> as is the typical AndroidManifiest.xml style
+    # we could write our own custom prettyprinter to do that?
+    tree.write(manifest)
+    prepend_to_file(MANIFEST_PREFACE, manifest)
+
+
+def main():
+    print 'Pub packages:'
+    for pubspec in PUBSPECS:
+        update_pubspec(pubspec)
+
+    # TODO(eseidel): Without this ET uses 'ns0' for 'android' which is wrong.
+    ET.register_namespace('android', 'http://schemas.android.com/apk/res/android')
+
+    print 'APKs:'
+    for manifest in MANIFESTS:
+        update_manifest(manifest)
+
+
+if __name__ == '__main__':
+    main()