convert to print_function

BUG=chromium:414895
TEST=`./cbuildbot/run_tests` passes
TEST=`cros lint` passes (it complains if print is used incorrectly)
TEST=`cbuildbot chromiumos-sdk` passes
TEST=`cbuildbot lumpy-release` passes

Change-Id: I67e7e1290b03a16525e0c2b1afa74ebbd8d3508f
Reviewed-on: https://chromium-review.googlesource.com/218572
Reviewed-by: David James <davidjames@chromium.org>
Reviewed-by: Yu-Ju Hong <yjhong@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>

24 files changed, 56 insertions, 8 deletions

diff --git a/cbuildbot/stages/afdo_stages.py b/cbuildbot/stages/afdo_stages.py
index abe69a75b..6e37b9434 100644
--- a/cbuildbot/stages/afdo_stages.py
+++ b/cbuildbot/stages/afdo_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the AFDO stages."""
 
+from __future__ import print_function
+
 from chromite.cbuildbot import afdo
 from chromite.cbuildbot import constants
 from chromite.lib import alerts
diff --git a/cbuildbot/stages/artifact_stages.py b/cbuildbot/stages/artifact_stages.py
index 2735494e5..b6415931d 100644
--- a/cbuildbot/stages/artifact_stages.py
+++ b/cbuildbot/stages/artifact_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing stages that generate and/or archive artifacts."""
 
+from __future__ import print_function
+
 import glob
 import itertools
 import json
diff --git a/cbuildbot/stages/artifact_stages_unittest.py b/cbuildbot/stages/artifact_stages_unittest.py
index 04d2f25b2..601adaf4d 100755
--- a/cbuildbot/stages/artifact_stages_unittest.py
+++ b/cbuildbot/stages/artifact_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for the artifact stages."""
 
+from __future__ import print_function
+
 import argparse
 import mox
 import os
diff --git a/cbuildbot/stages/branch_stages.py b/cbuildbot/stages/branch_stages.py
index 5a013d9a7..333dcac7b 100644
--- a/cbuildbot/stages/branch_stages.py
+++ b/cbuildbot/stages/branch_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the branch stages."""
 
+from __future__ import print_function
+
 import logging
 import os
 import re
diff --git a/cbuildbot/stages/branch_stages_unittest.py b/cbuildbot/stages/branch_stages_unittest.py
index 259a30355..b7a34d9d8 100755
--- a/cbuildbot/stages/branch_stages_unittest.py
+++ b/cbuildbot/stages/branch_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for the branch stages."""
 
+from __future__ import print_function
+
 import os
 import sys
 
diff --git a/cbuildbot/stages/build_stages.py b/cbuildbot/stages/build_stages.py
index fe869e98f..d169a8d80 100644
--- a/cbuildbot/stages/build_stages.py
+++ b/cbuildbot/stages/build_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the build stages."""
 
+from __future__ import print_function
+
 import functools
 import glob
 import os
diff --git a/cbuildbot/stages/build_stages_unittest.py b/cbuildbot/stages/build_stages_unittest.py
index 4619e0b15..b21cb3c1d 100755
--- a/cbuildbot/stages/build_stages_unittest.py
+++ b/cbuildbot/stages/build_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for build stages."""
 
+from __future__ import print_function
+
 import contextlib
 import os
 import sys
diff --git a/cbuildbot/stages/chrome_stages.py b/cbuildbot/stages/chrome_stages.py
index b660179fc..f712276c2 100644
--- a/cbuildbot/stages/chrome_stages.py
+++ b/cbuildbot/stages/chrome_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the Chrome stages."""
 
+from __future__ import print_function
+
 import multiprocessing
 import platform
 import os
@@ -206,8 +208,8 @@ class ChromeSDKStage(generic_stages.BoardSpecificBuilderStage,
   def PerformStage(self):
     if platform.dist()[-1] == 'lucid':
       # Chrome no longer builds on Lucid. See crbug.com/276311
-      print 'Ubuntu lucid is no longer supported.'
-      print 'Please upgrade to Ubuntu Precise.'
+      print('Ubuntu lucid is no longer supported.')
+      print('Please upgrade to Ubuntu Precise.')
       cros_build_lib.PrintBuildbotStepWarnings()
       return
 
diff --git a/cbuildbot/stages/chrome_stages_unittest.py b/cbuildbot/stages/chrome_stages_unittest.py
index 6bb2633f7..424fd22eb 100755
--- a/cbuildbot/stages/chrome_stages_unittest.py
+++ b/cbuildbot/stages/chrome_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for chrome stages."""
 
+from __future__ import print_function
+
 import mox
 import os
 import sys
diff --git a/cbuildbot/stages/completion_stages.py b/cbuildbot/stages/completion_stages.py
index a2255a60d..81c745dfe 100644
--- a/cbuildbot/stages/completion_stages.py
+++ b/cbuildbot/stages/completion_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the completion stages."""
 
+from __future__ import print_function
+
 import logging
 
 from chromite.cbuildbot import commands
diff --git a/cbuildbot/stages/completion_stages_unittest.py b/cbuildbot/stages/completion_stages_unittest.py
index 349582ec5..7db1dfec3 100755
--- a/cbuildbot/stages/completion_stages_unittest.py
+++ b/cbuildbot/stages/completion_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for completion stages."""
 
+from __future__ import print_function
+
 import mox
 import os
 import sys
diff --git a/cbuildbot/stages/generic_stages.py b/cbuildbot/stages/generic_stages.py
index 441fa9449..71756820f 100644
--- a/cbuildbot/stages/generic_stages.py
+++ b/cbuildbot/stages/generic_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the generic stages."""
 
+from __future__ import print_function
+
 import contextlib
 import fnmatch
 import json
@@ -173,7 +175,7 @@ class BuilderStage(object):
   def _Print(self, msg):
     """Prints a msg to stderr."""
     sys.stdout.flush()
-    print >> sys.stderr, msg
+    print(msg, file=sys.stderr)
     sys.stderr.flush()
 
   def _PrintLoudly(self, msg):
@@ -183,7 +185,7 @@ class BuilderStage(object):
     edge = '*' * 2
 
     sys.stdout.flush()
-    print >> sys.stderr, border_line
+    print(border_line, file=sys.stderr)
 
     msg_lines = msg.split('\n')
 
@@ -192,9 +194,9 @@ class BuilderStage(object):
       del msg_lines[-1]
 
     for msg_line in msg_lines:
-      print >> sys.stderr, '%s %s' % (edge, msg_line)
+      print('%s %s' % (edge, msg_line), file=sys.stderr)
 
-    print >> sys.stderr, border_line
+    print(border_line, file=sys.stderr)
     sys.stderr.flush()
 
   def _GetPortageEnvVar(self, envvar, board):
diff --git a/cbuildbot/stages/generic_stages_unittest.py b/cbuildbot/stages/generic_stages_unittest.py
index 9cb2082ba..93835d3e8 100755
--- a/cbuildbot/stages/generic_stages_unittest.py
+++ b/cbuildbot/stages/generic_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for generic stages."""
 
+from __future__ import print_function
+
 import contextlib
 import copy
 import mox
diff --git a/cbuildbot/stages/release_stages.py b/cbuildbot/stages/release_stages.py
index 9a22a78e9..a0c1f89fa 100644
--- a/cbuildbot/stages/release_stages.py
+++ b/cbuildbot/stages/release_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the various stages that a builder runs."""
 
+from __future__ import print_function
+
 import json
 import logging
 import os
diff --git a/cbuildbot/stages/release_stages_unittest.py b/cbuildbot/stages/release_stages_unittest.py
index e165ec291..baa2ad317 100755
--- a/cbuildbot/stages/release_stages_unittest.py
+++ b/cbuildbot/stages/release_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for build stages."""
 
+from __future__ import print_function
+
 import os
 import sys
 
diff --git a/cbuildbot/stages/report_stages.py b/cbuildbot/stages/report_stages.py
index 8602486fd..751b2028c 100644
--- a/cbuildbot/stages/report_stages.py
+++ b/cbuildbot/stages/report_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the report stages."""
 
+from __future__ import print_function
+
 import logging
 import os
 import sys
diff --git a/cbuildbot/stages/report_stages_unittest.py b/cbuildbot/stages/report_stages_unittest.py
index 28da0258f..dd3e03148 100755
--- a/cbuildbot/stages/report_stages_unittest.py
+++ b/cbuildbot/stages/report_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for report stages."""
 
+from __future__ import print_function
+
 import mox
 import os
 import sys
diff --git a/cbuildbot/stages/sdk_stages.py b/cbuildbot/stages/sdk_stages.py
index d0cbf58c2..007f3a531 100644
--- a/cbuildbot/stages/sdk_stages.py
+++ b/cbuildbot/stages/sdk_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing SDK stages."""
 
+from __future__ import print_function
+
 import json
 import os
 
diff --git a/cbuildbot/stages/sdk_stages_unittest.py b/cbuildbot/stages/sdk_stages_unittest.py
index 50be2330f..92068a8c9 100755
--- a/cbuildbot/stages/sdk_stages_unittest.py
+++ b/cbuildbot/stages/sdk_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for SDK stages."""
 
+from __future__ import print_function
+
 import mox
 import json
 import os
diff --git a/cbuildbot/stages/stage_results_unittest.py b/cbuildbot/stages/stage_results_unittest.py
index 21a420b7a..0545920bd 100755
--- a/cbuildbot/stages/stage_results_unittest.py
+++ b/cbuildbot/stages/stage_results_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for the stage results."""
 
+from __future__ import print_function
+
 import os
 import signal
 import StringIO
diff --git a/cbuildbot/stages/sync_stages.py b/cbuildbot/stages/sync_stages.py
index 1cfab39e5..101daf5db 100644
--- a/cbuildbot/stages/sync_stages.py
+++ b/cbuildbot/stages/sync_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the sync stages."""
 
+from __future__ import print_function
+
 import contextlib
 import datetime
 import logging
@@ -310,8 +312,8 @@ class SyncStage(generic_stages.BuilderStage):
     if not self.skip_sync:
       self.repo.Sync(next_manifest)
 
-    print >> sys.stderr, self.repo.ExportManifest(
-        mark_revision=self.output_manifest_sha1)
+    print(self.repo.ExportManifest(mark_revision=self.output_manifest_sha1),
+          file=sys.stderr)
 
   def RunPrePatchBuild(self):
     """Run through a pre-patch build to prepare for incremental build.
diff --git a/cbuildbot/stages/sync_stages_unittest.py b/cbuildbot/stages/sync_stages_unittest.py
index eaa90cdd6..4515acdd9 100755
--- a/cbuildbot/stages/sync_stages_unittest.py
+++ b/cbuildbot/stages/sync_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for sync stages."""
 
+from __future__ import print_function
+
 import cPickle
 import itertools
 import os
diff --git a/cbuildbot/stages/test_stages.py b/cbuildbot/stages/test_stages.py
index f50a79ec1..5725d2d1c 100644
--- a/cbuildbot/stages/test_stages.py
+++ b/cbuildbot/stages/test_stages.py
@@ -4,6 +4,8 @@
 
 """Module containing the test stages."""
 
+from __future__ import print_function
+
 import collections
 import logging
 import os
diff --git a/cbuildbot/stages/test_stages_unittest.py b/cbuildbot/stages/test_stages_unittest.py
index e61f95062..2bd0aeffa 100755
--- a/cbuildbot/stages/test_stages_unittest.py
+++ b/cbuildbot/stages/test_stages_unittest.py
@@ -5,6 +5,8 @@
 
 """Unittests for test stages."""
 
+from __future__ import print_function
+
 import mox
 import os
 import sys