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#!/usr/bin/env python
# Copyright 2014 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.
# This script retrieves the history of all V8 branches and trunk revisions and
# their corresponding Chromium revisions.
# Requires a chromium checkout with branch heads:
# gclient sync --with_branch_heads
# gclient fetch
import argparse
import csv
import itertools
import json
import os
import re
import sys
from common_includes import *
DEPS_FILE = "DEPS_FILE"
CHROMIUM = "CHROMIUM"
CONFIG = {
BRANCHNAME: "retrieve-v8-releases",
PERSISTFILE_BASENAME: "/tmp/v8-releases-tempfile",
DOT_GIT_LOCATION: ".git",
VERSION_FILE: "src/version.cc",
DEPS_FILE: "DEPS",
}
# Expression for retrieving the bleeding edge revision from a commit message.
PUSH_MESSAGE_RE = re.compile(r".* \(based on bleeding_edge revision r(\d+)\)$")
# Expression for retrieving the merged patches from a merge commit message
# (old and new format).
MERGE_MESSAGE_RE = re.compile(r"^.*[M|m]erged (.+)(\)| into).*$", re.M)
# Expression for retrieving reverted patches from a commit message (old and
# new format).
ROLLBACK_MESSAGE_RE = re.compile(r"^.*[R|r]ollback of (.+)(\)| in).*$", re.M)
# Expression for retrieving the code review link.
REVIEW_LINK_RE = re.compile(r"^Review URL: (.+)$", re.M)
# Expression with three versions (historical) for extracting the v8 revision
# from the chromium DEPS file.
DEPS_RE = re.compile(r'^\s*(?:"v8_revision": "'
'|\(Var\("googlecode_url"\) % "v8"\) \+ "\/trunk@'
'|"http\:\/\/v8\.googlecode\.com\/svn\/trunk@)'
'([0-9]+)".*$', re.M)
def SortingKey(version):
"""Key for sorting version number strings: '3.11' > '3.2.1.1'"""
version_keys = map(int, version.split("."))
# Fill up to full version numbers to normalize comparison.
while len(version_keys) < 4:
version_keys.append(0)
# Fill digits.
return ".".join(map("{0:03d}".format, version_keys))
def SortBranches(branches):
"""Sort branches with version number names."""
return sorted(branches, key=SortingKey, reverse=True)
def FilterDuplicatesAndReverse(cr_releases):
"""Returns the chromium releases in reverse order filtered by v8 revision
duplicates.
cr_releases is a list of [cr_rev, v8_rev] reverse-sorted by cr_rev.
"""
last = ""
result = []
for release in reversed(cr_releases):
if last == release[1]:
continue
last = release[1]
result.append(release)
return result
def BuildRevisionRanges(cr_releases):
"""Returns a mapping of v8 revision -> chromium ranges.
The ranges are comma-separated, each range has the form R1:R2. The newest
entry is the only one of the form R1, as there is no end range.
cr_releases is a list of [cr_rev, v8_rev] reverse-sorted by cr_rev.
cr_rev either refers to a chromium svn revision or a chromium branch number.
"""
range_lists = {}
cr_releases = FilterDuplicatesAndReverse(cr_releases)
# Visit pairs of cr releases from oldest to newest.
for cr_from, cr_to in itertools.izip(
cr_releases, itertools.islice(cr_releases, 1, None)):
# Assume the chromium revisions are all different.
assert cr_from[0] != cr_to[0]
# TODO(machenbach): Subtraction is not git friendly.
ran = "%s:%d" % (cr_from[0], int(cr_to[0]) - 1)
# Collect the ranges in lists per revision.
range_lists.setdefault(cr_from[1], []).append(ran)
# Add the newest revision.
if cr_releases:
range_lists.setdefault(cr_releases[-1][1], []).append(cr_releases[-1][0])
# Stringify and comma-separate the range lists.
return dict((rev, ", ".join(ran)) for rev, ran in range_lists.iteritems())
def MatchSafe(match):
if match:
return match.group(1)
else:
return ""
class Preparation(Step):
MESSAGE = "Preparation."
def RunStep(self):
self.CommonPrepare()
self.PrepareBranch()
class RetrieveV8Releases(Step):
MESSAGE = "Retrieve all V8 releases."
def ExceedsMax(self, releases):
return (self._options.max_releases > 0
and len(releases) > self._options.max_releases)
def GetBleedingEdgeFromPush(self, title):
return MatchSafe(PUSH_MESSAGE_RE.match(title))
def GetMergedPatches(self, body):
patches = MatchSafe(MERGE_MESSAGE_RE.search(body))
if not patches:
patches = MatchSafe(ROLLBACK_MESSAGE_RE.search(body))
if patches:
# Indicate reverted patches with a "-".
patches = "-%s" % patches
return patches
def GetRelease(self, git_hash, branch):
self.ReadAndPersistVersion()
base_version = [self["major"], self["minor"], self["build"]]
version = ".".join(base_version)
body = self.GitLog(n=1, format="%B", git_hash=git_hash)
patches = ""
if self["patch"] != "0":
version += ".%s" % self["patch"]
patches = self.GetMergedPatches(body)
title = self.GitLog(n=1, format="%s", git_hash=git_hash)
revision = self.GitSVNFindSVNRev(git_hash)
return {
# The SVN revision on the branch.
"revision": revision,
# The SVN revision on bleeding edge (only for newer trunk pushes).
"bleeding_edge": self.GetBleedingEdgeFromPush(title),
# The branch name.
"branch": branch,
# The version for displaying in the form 3.26.3 or 3.26.3.12.
"version": version,
# The date of the commit.
"date": self.GitLog(n=1, format="%ci", git_hash=git_hash),
# Merged patches if available in the form 'r1234, r2345'.
"patches_merged": patches,
# Default for easier output formatting.
"chromium_revision": "",
# Default for easier output formatting.
"chromium_branch": "",
# Link to the CL on code review. Trunk pushes are not uploaded, so this
# field will be populated below with the recent roll CL link.
"review_link": MatchSafe(REVIEW_LINK_RE.search(body)),
# Link to the commit message on google code.
"revision_link": ("https://code.google.com/p/v8/source/detail?r=%s"
% revision),
}, self["patch"]
def GetReleasesFromBranch(self, branch):
self.GitReset("svn/%s" % branch)
releases = []
try:
for git_hash in self.GitLog(format="%H").splitlines():
if self._config[VERSION_FILE] not in self.GitChangedFiles(git_hash):
continue
if self.ExceedsMax(releases):
break # pragma: no cover
if not self.GitCheckoutFileSafe(self._config[VERSION_FILE], git_hash):
break # pragma: no cover
release, patch_level = self.GetRelease(git_hash, branch)
releases.append(release)
# Follow branches only until their creation point.
# TODO(machenbach): This omits patches if the version file wasn't
# manipulated correctly. Find a better way to detect the point where
# the parent of the branch head leads to the trunk branch.
if branch != "trunk" and patch_level == "0":
break
# Allow Ctrl-C interrupt.
except (KeyboardInterrupt, SystemExit): # pragma: no cover
pass
# Clean up checked-out version file.
self.GitCheckoutFileSafe(self._config[VERSION_FILE], "HEAD")
return releases
def RunStep(self):
self.GitCreateBranch(self._config[BRANCHNAME])
# Get relevant remote branches, e.g. "svn/3.25".
branches = filter(lambda s: re.match(r"^svn/\d+\.\d+$", s),
self.GitRemotes())
# Remove 'svn/' prefix.
branches = map(lambda s: s[4:], branches)
releases = []
if self._options.branch == 'recent':
# Get only recent development on trunk, beta and stable.
if self._options.max_releases == 0: # pragma: no cover
self._options.max_releases = 10
beta, stable = SortBranches(branches)[0:2]
releases += self.GetReleasesFromBranch(stable)
releases += self.GetReleasesFromBranch(beta)
releases += self.GetReleasesFromBranch("trunk")
elif self._options.branch == 'all': # pragma: no cover
# Retrieve the full release history.
for branch in branches:
releases += self.GetReleasesFromBranch(branch)
releases += self.GetReleasesFromBranch("trunk")
else: # pragma: no cover
# Retrieve history for a specified branch.
assert self._options.branch in branches + ["trunk"]
releases += self.GetReleasesFromBranch(self._options.branch)
self["releases"] = sorted(releases,
key=lambda r: SortingKey(r["version"]),
reverse=True)
# TODO(machenbach): Parts of the Chromium setup are c/p from the chromium_roll
# script -> unify.
class CheckChromium(Step):
MESSAGE = "Check the chromium checkout."
def Run(self):
self["chrome_path"] = self._options.chromium
class SwitchChromium(Step):
MESSAGE = "Switch to Chromium checkout."
REQUIRES = "chrome_path"
def RunStep(self):
self["v8_path"] = os.getcwd()
os.chdir(self["chrome_path"])
# 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(self.Config(BRANCHNAME))
class RetrieveChromiumV8Releases(Step):
MESSAGE = "Retrieve V8 releases from Chromium DEPS."
REQUIRES = "chrome_path"
def RunStep(self):
os.chdir(self["chrome_path"])
trunk_releases = filter(lambda r: r["branch"] == "trunk", self["releases"])
if not trunk_releases: # pragma: no cover
print "No trunk releases detected. Skipping chromium history."
return True
oldest_v8_rev = int(trunk_releases[-1]["revision"])
cr_releases = []
try:
for git_hash in self.GitLog(format="%H", grep="V8").splitlines():
if self._config[DEPS_FILE] not in self.GitChangedFiles(git_hash):
continue
if not self.GitCheckoutFileSafe(self._config[DEPS_FILE], git_hash):
break # pragma: no cover
deps = FileToText(self.Config(DEPS_FILE))
match = DEPS_RE.search(deps)
if match:
svn_rev = self.GitSVNFindSVNRev(git_hash)
v8_rev = match.group(1)
cr_releases.append([svn_rev, v8_rev])
# Stop after reaching beyond the last v8 revision we want to update.
# We need a small buffer for possible revert/reland frenzies.
# TODO(machenbach): Subtraction is not git friendly.
if int(v8_rev) < oldest_v8_rev - 100:
break # pragma: no cover
# Allow Ctrl-C interrupt.
except (KeyboardInterrupt, SystemExit): # pragma: no cover
pass
# Clean up.
self.GitCheckoutFileSafe(self._config[DEPS_FILE], "HEAD")
# Add the chromium ranges to the v8 trunk releases.
all_ranges = BuildRevisionRanges(cr_releases)
trunk_dict = dict((r["revision"], r) for r in trunk_releases)
for revision, ranges in all_ranges.iteritems():
trunk_dict.get(revision, {})["chromium_revision"] = ranges
# TODO(machenbach): Unify common code with method above.
class RietrieveChromiumBranches(Step):
MESSAGE = "Retrieve Chromium branch information."
REQUIRES = "chrome_path"
def RunStep(self):
os.chdir(self["chrome_path"])
trunk_releases = filter(lambda r: r["branch"] == "trunk", self["releases"])
if not trunk_releases: # pragma: no cover
print "No trunk releases detected. Skipping chromium history."
return True
oldest_v8_rev = int(trunk_releases[-1]["revision"])
# Filter out irrelevant branches.
branches = filter(lambda r: re.match(r"branch-heads/\d+", r),
self.GitRemotes())
# Transform into pure branch numbers.
branches = map(lambda r: int(re.match(r"branch-heads/(\d+)", r).group(1)),
branches)
branches = sorted(branches, reverse=True)
cr_branches = []
try:
for branch in branches:
if not self.GitCheckoutFileSafe(self._config[DEPS_FILE],
"branch-heads/%d" % branch):
break # pragma: no cover
deps = FileToText(self.Config(DEPS_FILE))
match = DEPS_RE.search(deps)
if match:
v8_rev = match.group(1)
cr_branches.append([str(branch), v8_rev])
# Stop after reaching beyond the last v8 revision we want to update.
# We need a small buffer for possible revert/reland frenzies.
# TODO(machenbach): Subtraction is not git friendly.
if int(v8_rev) < oldest_v8_rev - 100:
break # pragma: no cover
# Allow Ctrl-C interrupt.
except (KeyboardInterrupt, SystemExit): # pragma: no cover
pass
# Clean up.
self.GitCheckoutFileSafe(self._config[DEPS_FILE], "HEAD")
# Add the chromium branches to the v8 trunk releases.
all_ranges = BuildRevisionRanges(cr_branches)
trunk_dict = dict((r["revision"], r) for r in trunk_releases)
for revision, ranges in all_ranges.iteritems():
trunk_dict.get(revision, {})["chromium_branch"] = ranges
class SwitchV8(Step):
MESSAGE = "Returning to V8 checkout."
REQUIRES = "chrome_path"
def RunStep(self):
self.GitCheckout("master")
self.GitDeleteBranch(self.Config(BRANCHNAME))
os.chdir(self["v8_path"])
class CleanUp(Step):
MESSAGE = "Clean up."
def RunStep(self):
self.CommonCleanup()
class WriteOutput(Step):
MESSAGE = "Print output."
def Run(self):
if self._options.csv:
with open(self._options.csv, "w") as f:
writer = csv.DictWriter(f,
["version", "branch", "revision",
"chromium_revision", "patches_merged"],
restval="",
extrasaction="ignore")
for release in self["releases"]:
writer.writerow(release)
if self._options.json:
with open(self._options.json, "w") as f:
f.write(json.dumps(self["releases"]))
if not self._options.csv and not self._options.json:
print self["releases"] # pragma: no cover
class Releases(ScriptsBase):
def _PrepareOptions(self, parser):
parser.add_argument("-b", "--branch", default="recent",
help=("The branch to analyze. If 'all' is specified, "
"analyze all branches. If 'recent' (default) "
"is specified, track beta, stable and trunk."))
parser.add_argument("-c", "--chromium",
help=("The path to your Chromium src/ "
"directory to automate the V8 roll."))
parser.add_argument("--csv", help="Path to a CSV file for export.")
parser.add_argument("-m", "--max-releases", type=int, default=0,
help="The maximum number of releases to track.")
parser.add_argument("--json", help="Path to a JSON file for export.")
def _ProcessOptions(self, options): # pragma: no cover
return True
def _Steps(self):
return [
Preparation,
RetrieveV8Releases,
CheckChromium,
SwitchChromium,
UpdateChromiumCheckout,
RetrieveChromiumV8Releases,
RietrieveChromiumBranches,
SwitchV8,
CleanUp,
WriteOutput,
]
if __name__ == "__main__": # pragma: no cover
sys.exit(Releases(CONFIG).Run())