Python 3 compatibility

buildbot/buildbot_run.py

 #!/usr/bin/env python
 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Argument-less script to select what to run on the buildbots."""
 
+from __future__ import print_function
+
 import os
 import shutil
 import subprocess
 import sys
 
 
 BUILDBOT_DIR = os.path.dirname(os.path.abspath(__file__))
 TRUNK_DIR = os.path.dirname(BUILDBOT_DIR)
 ROOT_DIR = os.path.dirname(TRUNK_DIR)
 CMAKE_DIR = os.path.join(ROOT_DIR, 'cmake')
 CMAKE_BIN_DIR = os.path.join(CMAKE_DIR, 'bin')
 OUT_DIR = os.path.join(TRUNK_DIR, 'out')
 
 
 def CallSubProcess(*args, **kwargs):
   """Wrapper around subprocess.call which treats errors as build exceptions."""
   with open(os.devnull) as devnull_fd:
     retcode = subprocess.call(stdin=devnull_fd, *args, **kwargs)
   if retcode != 0:
-    print '@@@STEP_EXCEPTION@@@'
+    print('@@@STEP_EXCEPTION@@@')
     sys.exit(1)
 
 
 def PrepareCmake():
   """Build CMake 2.8.8 since the version in Precise is 2.8.7."""
   if os.environ['BUILDBOT_CLOBBER'] == '1':
-    print '@@@BUILD_STEP Clobber CMake checkout@@@'
+    print('@@@BUILD_STEP Clobber CMake checkout@@@')
     shutil.rmtree(CMAKE_DIR)
 
   # We always build CMake 2.8.8, so no need to do anything
   # if the directory already exists.
   if os.path.isdir(CMAKE_DIR):
     return
 
-  print '@@@BUILD_STEP Initialize CMake checkout@@@'
+  print('@@@BUILD_STEP Initialize CMake checkout@@@')
   os.mkdir(CMAKE_DIR)
 
-  print '@@@BUILD_STEP Sync CMake@@@'
+  print('@@@BUILD_STEP Sync CMake@@@')
   CallSubProcess(
       ['git', 'clone',
        '--depth', '1',
        '--single-branch',
        '--branch', 'v2.8.8',
        '--',
        'git://cmake.org/cmake.git',
        CMAKE_DIR],
       cwd=CMAKE_DIR)
 
-  print '@@@BUILD_STEP Build CMake@@@'
+  print('@@@BUILD_STEP Build CMake@@@')
   CallSubProcess(
       ['/bin/bash', 'bootstrap', '--prefix=%s' % CMAKE_DIR],
       cwd=CMAKE_DIR)
 
   CallSubProcess( ['make', 'cmake'], cwd=CMAKE_DIR)
 
 
 def GypTestFormat(title, format=None, msvs_version=None, tests=[]):
   """Run the gyp tests for a given format, emitting annotator tags.
 
   See annotator docs at:
     https://sites.google.com/a/chromium.org/dev/developers/testing/chromium-build-infrastructure/buildbot-annotations
   Args:
     format: gyp format to test.
   Returns:
     0 for sucesss, 1 for failure.
   """
   if not format:
     format = title
 
-  print '@@@BUILD_STEP ' + title + '@@@'
+  print('@@@BUILD_STEP ' + title + '@@@')
   sys.stdout.flush()
   env = os.environ.copy()
   if msvs_version:
     env['GYP_MSVS_VERSION'] = msvs_version
   command = ' '.join(
       [sys.executable, 'gyp/gyptest.py',
        '--all',
        '--passed',
        '--format', format,
        '--path', CMAKE_BIN_DIR,
        '--chdir', 'gyp'] + tests)
   retcode = subprocess.call(command, cwd=ROOT_DIR, env=env, shell=True)
   if retcode:
     # Emit failure tag, and keep going.
-    print '@@@STEP_FAILURE@@@'
+    print('@@@STEP_FAILURE@@@')
     return 1
   return 0
 
 
 def GypBuild():
   # Dump out/ directory.
-  print '@@@BUILD_STEP cleanup@@@'
-  print 'Removing %s...' % OUT_DIR
+  print('@@@BUILD_STEP cleanup@@@')
+  print('Removing %s...' % OUT_DIR)
   shutil.rmtree(OUT_DIR, ignore_errors=True)
-  print 'Done.'
+  print('Done.')
 
   retcode = 0
   if sys.platform.startswith('linux'):
     retcode += GypTestFormat('ninja')
     retcode += GypTestFormat('make')
     PrepareCmake()
     retcode += GypTestFormat('cmake')
   elif sys.platform == 'darwin':
     retcode += GypTestFormat('ninja')
     retcode += GypTestFormat('xcode')
     retcode += GypTestFormat('make')
   elif sys.platform == 'win32':
     retcode += GypTestFormat('ninja')
     if os.environ['BUILDBOT_BUILDERNAME'] == 'gyp-win64':
       retcode += GypTestFormat('msvs-ninja-2013', format='msvs-ninja',
                                msvs_version='2013',
                                tests=[
                                   r'test\generator-output\gyptest-actions.py',
                                   r'test\generator-output\gyptest-relocate.py',
                                   r'test\generator-output\gyptest-rules.py'])
       retcode += GypTestFormat('msvs-2013', format='msvs', msvs_version='2013')
   else:
     raise Exception('Unknown platform')
   if retcode:
     # TODO(bradnelson): once the annotator supports a postscript (section for
     #     after the build proper that could be used for cumulative failures),
     #     use that instead of this. This isolates the final return value so
     #     that it isn't misattributed to the last stage.
-    print '@@@BUILD_STEP failures@@@'
+    print('@@@BUILD_STEP failures@@@')
     sys.exit(retcode)
 
 
 if __name__ == '__main__':
   GypBuild()