Set up Android build config.

tools/bots/android.py

+#!/usr/bin/python
+
+# Copyright (c) 2012 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.
+
+"""
+Android buildbot steps.
+"""
+
+import re
+import sys
+
+import bot
+
+ANDROID_BUILDER = r'vm-android-(linux|mac|win)'
+
+def AndroidConfig(name, is_buildbot):
+  """Returns info for the current buildbot based on the name of the builder.
+
+  Currently, this is just:
+  - mode: always "release" (for now)
+  - system: "linux", "mac", or "win"
+  """
+  android_pattern = re.match(ANDROID_BUILDER, name)
+  if not android_pattern:
+    return None
+
+  system = android_pattern.group(1)
+  if system == 'win': system = 'windows'
+
+  return bot.BuildInfo('none', 'vm', 'release', system, checked=True)
+
+
+def AndroidSteps(build_info):
+  # Here's where we'll run tests.

[Bob Nystrom, 2012/10/25 00:49:16]

Make this a TODO comment.

[Emily Fortuna, 2012/10/25 01:33:34]

Done.

+  #bot.RunTest('android', build_info, ['android'])
+  pass
+
+def BuildAndroid(mode, system):
+  """
+  Builds the android target.
+
+  - mode: either 'debug' or 'release'
+  - system: the host system where we're building. Either 'linux', 'mac', or
+      'win7'.
+  """
+  with bot.BuildStep('Build Android'):
+    args = [sys.executable, './tools/build.py', '--mode=' + mode,
+        '--os=android dart']

[Bob Nystrom, 2012/10/25 00:49:16]

How about we add OS to BuildInfo and then have the BuildSDK fn in bot.py check
that and add the flag as needed? Is that the only difference between this one
and the one in bot.py?

And, now that I look at it, bot.BuildSDK can probably just take the whole
build_info object instead of splitting out the mode and system (which it doesn't
even appear to use).

[gram, 2012/10/25 00:51:36]

The target 'dart' here is going to change so we probably want to pull that out
and make it a parameter.

[Emily Fortuna, 2012/10/25 01:33:34]

@Bob, the difference is that the one in bot.py is building the sdk, whereas this
is building the android target, not the sdk. 

@Graham, more info, please? in what way will it change? how should it be
communicated to the buildbot?

[Bob Nystrom, 2012/10/25 16:12:16]

Ah, that makes sense. I didn't notice the target was different too. Does the
Android bot not need the SDK built at all?

[Emily Fortuna, 2012/10/25 18:19:38]

@Bob Apparently not (?) (Graham feel free to correct me)

+    print 'Building Android: %s' % (' '.join(args))
+    bot.RunProcess(args)
+
+if __name__ == '__main__':
+  bot.RunBot(AndroidConfig, AndroidSteps, build_step=BuildAndroid)