[tools] backport_node.py increments V8 version in target.

R=franzih@chromium.org, machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2846883002
Cr-Commit-Position: refs/heads/master@{#44943}

tools/release/backport_node.py

@@ -14,7 +14,8 @@ Usage:
   $ backport_node.py <path_to_v8> <path_to_node> <commit-hash>
 
   This will apply the commit to <path_to_node>/deps/v8 and create a commit in
-  the Node.js checkout and copy over the original commit message.
+  the Node.js checkout, increment patch level, and copy over the original
+  commit message.
 
 Optional flags:
   --no-review  Run `gclient sync` on the V8 checkout before updating.
@@ -23,9 +24,19 @@ Optional flags:
 import argparse
 import os
 import subprocess
+import re
 import sys
 
+from common_includes import *
+
 TARGET_SUBDIR = os.path.join("deps", "v8")
+VERSION_FILE = os.path.join("include", "v8-version.h")
+VERSION_PATTERN = r'(?<=#define V8_PATCH_LEVEL )\d+'
+
+def Clean(options):
+  print ">> Cleaning target directory."
+  subprocess.check_call(["git", "clean", "-fd"],
+                        cwd = os.path.join(options.node_path, TARGET_SUBDIR))
 
 def CherryPick(options):
   print ">> Apply patch."
@@ -42,6 +53,16 @@ def CherryPick(options):
     while raw_input("[RESOLVED]") != "RESOLVED":
       print ">> You need to type RESOLVED"
 
+def UpdateVersion(options):
+  print ">> Increment patch level."
+  version_file = os.path.join(options.node_path, TARGET_SUBDIR, VERSION_FILE)
+  text = FileToText(version_file)
+  def increment(match):
+    patch = int(match.group(0))
+    return str(patch + 1)
+  text = re.sub(VERSION_PATTERN, increment, text, flags=re.MULTILINE)
+  TextToFile(text, version_file)
+
 def CreateCommit(options):
   print ">> Creating commit."
   # Find short hash from source.
@@ -84,8 +105,10 @@ def ParseOptions(args):
 
 def Main(args):
   options = ParseOptions(args)
+  Clean(options)
   try:
     CherryPick(options)
+    UpdateVersion(options)
     CreateCommit(options)
   except:
     print ">> Failed. Resetting."

tools/release/test_backport_node.py

@@ -10,6 +10,7 @@ import sys
 import tempfile
 import unittest
 
+from common_includes import FileToText
 import backport_node
 
 # Base paths.
@@ -62,5 +63,9 @@ class TestUpdateNode(unittest.TestCase):
     )
     self.assertIn('+zonk', gitlog.strip())
 
+    # Check version.
+    version_file = os.path.join(node_cwd, "deps", "v8", "include", "v8-version.h")
+    self.assertIn('#define V8_PATCH_LEVEL 4322', FileToText(version_file))
+
 if __name__ == "__main__":
   unittest.main()

tools/release/testdata/node/deps/v8/include/v8-version.h

@@ -0,0 +1,20 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_INCLUDE_VERSION_H_  // V8_VERSION_H_ conflicts with src/version.h
+#define V8_INCLUDE_VERSION_H_
+
+// These macros define the version number for the current version.
+// NOTE these macros are used by some of the tool scripts and the build
+// system so their names cannot be changed without changing the scripts.
+#define V8_MAJOR_VERSION 1
+#define V8_MINOR_VERSION 2
+#define V8_BUILD_NUMBER 3
+#define V8_PATCH_LEVEL 4321
+
+// Use 1 for candidates and 0 otherwise.
+// (Boolean macro values are not supported by all preprocessors.)
+#define V8_IS_CANDIDATE_VERSION 0
+
+#endif  // V8_INCLUDE_VERSION_H_

tools/verify_source_deps.py

@@ -56,6 +56,7 @@ ALL_GYP_PREFIXES = [
 GYP_UNSUPPORTED_FEATURES = [
   'gcmole',
   'setup-isolate-deserialize.cc',
+  'v8-version.h'
 ]
 
 GN_FILES = [
@@ -80,6 +81,7 @@ GN_UNSUPPORTED_FEATURES = [
   'qnx',
   'solaris',
   'vtune',
+  'v8-version.h',
   'x87',
 ]