Add support for running comparison of dart2js and dart2js with --dump-info output to the bots.

tools/bots/dart2js_dump_info.py

+#!/usr/bin/python
+
+# Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+"""
+Buildbot steps for testing dart2js with --dump-info turned on
+"""
+import os
+import shutil
+import sys
+import bot
+import bot_utils
+
+utils = bot_utils.GetUtils()
+HOST_OS = utils.GuessOS()
+
+def DumpConfig(name, is_buildbot):
+  """Returns info for the current buildbot.
+  We only run this bot on linux, so all of this is just hard coded.
+  """
+  return bot.BuildInfo('none', 'none', 'release', 'linux')
+
+def Run(args):
+  print "Running: %s" % ' '.join(args)
+  sys.stdout.flush()
+  bot.RunProcess(args)
+
+def DumpSteps(build_info):
+  build_root = utils.GetBuildRoot(HOST_OS, mode='release', arch='ia32')
+  compilations_dir = os.path.join(bot_utils.DART_DIR,
+                                  build_root,
+                                  'generated_compilations')
+  tests = ['html', 'samples']
+
+  with bot.BuildStep('Cleaning out old compilations'):
+    print "Cleaning out %s" % compilations_dir
+    shutil.rmtree(compilations_dir, ignore_errors=True)
+
+  with utils.TempDir() as temp_dir:
+    normal_compilations = os.path.join(temp_dir, 'normal')
+    dump_compilations = os.path.join(temp_dir, 'dump')
+    normal_compilation_command = [sys.executable, './tools/test.py',
+                                  '--mode=' + build_info.mode,
+                                  '-cdart2js', '-rnone'] + tests
+    with bot.BuildStep('Compiling without dump info'):
+      Run(normal_compilation_command)
+      pass
+
+    with bot.BuildStep('Store normal compilation artifacts'):
+      args = ['mv', compilations_dir, normal_compilations]
+      Run(args)
+
+    with bot.BuildStep('Compiling with dump info'):
+      args = normal_compilation_command + ['--dart2js-options=--dump-info']
+      Run(args)
+
+    with bot.BuildStep('Store normal compilation artifacts'):
+      args = ['mv', compilations_dir, dump_compilations]
+      Run(args)
+
+    with bot.BuildStep('Compare outputs'):
+      args = ['diff', '-rq', '-x', '*\.json',
+              normal_compilations, dump_compilations]
+      # Diff will return non zero and we will throw if there are any differences
+      Run(args)
+
+    with bot.BuildStep('Validate dump files'):
+      # Do whatever you like :-), files are in dump_compilations
+      pass
+
+if __name__ == '__main__':
+  bot.RunBot(DumpConfig, DumpSteps)
+