Split of rolling Chromium from push-to-trunk.

tools/push-to-trunk/chromium_roll.py

Index: tools/push-to-trunk/chromium_roll.py
diff --git a/tools/push-to-trunk/chromium_roll.py b/tools/push-to-trunk/chromium_roll.py
new file mode 100755
index 0000000000000000000000000000000000000000..9abe4e1da86d2f2696a016f8447efa2c72440a88
--- /dev/null
+++ b/tools/push-to-trunk/chromium_roll.py
@@ -0,0 +1,196 @@
+#!/usr/bin/env python
+# Copyright 2014 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without

[Jakob Kummerow, 2014/03/20 15:16:54]

use the new short license header for new files

+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import argparse
+import os
+import sys
+
+from common_includes import *
+
+DEPS_FILE = "DEPS_FILE"
+CHROMIUM = "CHROMIUM"
+
+CONFIG = {
+  PERSISTFILE_BASENAME: "/tmp/v8-chromium-roll-tempfile",
+  DOT_GIT_LOCATION: ".git",
+  DEPS_FILE: "DEPS",
+}
+
+
+class Preparation(Step):
+  MESSAGE = "Preparation."
+
+  def RunStep(self):
+    self.CommonPrepare()
+
+
+class DetectLastPush(Step):
+  MESSAGE = "Detect commit ID of last push to trunk."
+
+  def RunStep(self):
+    self["last_push"] = self._options.last_push or self.FindLastTrunkPush()
+    self["trunk_revision"] = self.GitSVNFindSVNRev(self["last_push"])
+    self["push_title"] = self.GitLog(n=1, format="%s",
+                                     git_hash=self["last_push"])
+
+
+class CheckChromium(Step):
+  MESSAGE = "Ask for chromium checkout."
+
+  def Run(self):
+    self["chrome_path"] = self._options.chromium
+    if not self["chrome_path"]:
+      self.DieNoManualMode("Please specify the path to a Chromium checkout in "
+                           "forced mode.")
+      print ("Do you have a \"NewGit\" Chromium checkout and want "
+          "this script to automate creation of the roll CL? If yes, enter the "

[Jakob Kummerow, 2014/03/20 15:16:54]

This prompt doesn't make sense any more. Suggestion: turn the loop into 'while
not self["chrome_path"]:' and update the printed text.

+          "path to (and including) the \"src\" directory here, otherwise just "
+          "press <Return>: "),
+      self["chrome_path"] = self.ReadLine()
+
+
+class SwitchChromium(Step):
+  MESSAGE = "Switch to Chromium checkout."
+  REQUIRES = "chrome_path"
+
+  def RunStep(self):
+    self["v8_path"] = os.getcwd()
+    os.chdir(self["chrome_path"])
+    self.InitialEnvironmentChecks()
+    # Check for a clean workdir.
+    if not self.GitIsWorkdirClean():  # pragma: no cover
+      self.Die("Workspace is not clean. Please commit or undo your changes.")
+    # Assert that the DEPS file is there.
+    if not os.path.exists(self.Config(DEPS_FILE)):  # pragma: no cover
+      self.Die("DEPS file not present.")
+
+
+class UpdateChromiumCheckout(Step):
+  MESSAGE = "Update the checkout and create a new branch."
+  REQUIRES = "chrome_path"
+
+  def RunStep(self):
+    os.chdir(self["chrome_path"])
+    self.GitCheckout("master")
+    self.GitPull()
+    self.GitCreateBranch("v8-roll-%s" % self["trunk_revision"])
+
+
+class UploadCL(Step):
+  MESSAGE = "Create and upload CL."
+  REQUIRES = "chrome_path"
+
+  def RunStep(self):
+    os.chdir(self["chrome_path"])
+
+    # Patch DEPS file.
+    deps = FileToText(self.Config(DEPS_FILE))
+    deps = re.sub("(?<=\"v8_revision\": \")([0-9]+)(?=\")",
+                  self["trunk_revision"],
+                  deps)
+    TextToFile(deps, self.Config(DEPS_FILE))
+
+    if self._options.reviewer:
+      print "Using account %s for review." % self._options.reviewer
+      rev = self._options.reviewer
+    else:
+      print "Please enter the email address of a reviewer for the roll CL: ",
+      self.DieNoManualMode("A reviewer must be specified in forced mode.")
+      rev = self.ReadLine()
+
+    commit_title = "Update V8 to %s." % self["push_title"].lower()
+    self.GitCommit("%s\n\nTBR=%s" % (commit_title, rev))
+    self.GitUpload(author=self._options.author,
+                   force=self._options.force_upload)
+    print "CL uploaded."
+
+
+class SwitchV8(Step):
+  MESSAGE = "Returning to V8 checkout."
+  REQUIRES = "chrome_path"
+
+  def RunStep(self):
+    os.chdir(self["v8_path"])
+
+
+class CleanUp(Step):
+  MESSAGE = "Done!"
+
+  def RunStep(self):
+    print("Congratulations, you have successfully rolled the push r%s it into "
+          "Chromium. Please don't forget to update the v8rel spreadsheet."
+          % self["trunk_revision"])
+
+    # Clean up all temporary files.
+    Command("rm", "-f %s*" % self._config[PERSISTFILE_BASENAME])
+
+
+class ChromiumRoll(ScriptsBase):
+  def _PrepareOptions(self, parser):
+    group = parser.add_mutually_exclusive_group()
+    group.add_argument("-f", "--force",
+                      help="Don't prompt the user.",
+                      default=False, action="store_true")
+    group.add_argument("-m", "--manual",
+                      help="Prompt the user at every important step.",
+                      default=False, action="store_true")
+    parser.add_argument("-c", "--chromium",
+                        help=("The path to your Chromium src/ "
+                              "directory to automate the V8 roll."))
+    parser.add_argument("-l", "--last-push",
+                        help="The git commit ID of the last push to trunk.")
+
+  def _ProcessOptions(self, options):  # pragma: no cover
+    if not options.manual and not options.reviewer:
+      print "A reviewer (-r) is required in (semi-)automatic mode."
+      return False
+    if not options.manual and not options.chromium:
+      print "A chromium checkout (-c) is required in (semi-)automatic mode."
+      return False
+    if not options.manual and not options.author:
+      print "Specify your chromium.org email with -a in (semi-)automatic mode."
+      return False
+
+    options.tbr_commit = not options.manual
+    return True
+
+  def _Steps(self):
+    return [
+      Preparation,
+      DetectLastPush,
+      CheckChromium,
+      SwitchChromium,
+      UpdateChromiumCheckout,
+      UploadCL,
+      SwitchV8,
+      CleanUp,
+    ]
+
+
+if __name__ == "__main__":  # pragma: no cover
+  sys.exit(ChromiumRoll(CONFIG).Run())