v8/tools/push-to-trunk/git_recipes.py

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#!/usr/bin/env python
# Copyright 2014 the V8 project authors. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# 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 re
SHA1_RE = re.compile('^[a-fA-F0-9]{40}$')
ROLL_DEPS_GIT_SVN_ID_RE = re.compile('^git-svn-id: .*@([0-9]+) .*$')
# Regular expression that matches a single commit footer line.
COMMIT_FOOTER_ENTRY_RE = re.compile(r'([^:]+):\s+(.+)')
# Footer metadata key for commit position.
COMMIT_POSITION_FOOTER_KEY = 'Cr-Commit-Position'
# Regular expression to parse a commit position
COMMIT_POSITION_RE = re.compile(r'(.+)@\{#(\d+)\}')
# Key for the 'git-svn' ID metadata commit footer entry.
GIT_SVN_ID_FOOTER_KEY = 'git-svn-id'
# e.g., git-svn-id: https://v8.googlecode.com/svn/trunk@23117
# ce2b1a6d-e550-0410-aec6-3dcde31c8c00
GIT_SVN_ID_RE = re.compile(r'[^@]+@(\d+)\s+(?:[a-zA-Z0-9\-]+)')
# Copied from bot_update.py.
def GetCommitMessageFooterMap(message):
"""Returns: (dict) A dictionary of commit message footer entries.
"""
footers = {}
# Extract the lines in the footer block.
lines = []
for line in message.strip().splitlines():
line = line.strip()
if len(line) == 0:
del(lines[:])
continue
lines.append(line)
# Parse the footer
for line in lines:
m = COMMIT_FOOTER_ENTRY_RE.match(line)
if not m:
# If any single line isn't valid, the entire footer is invalid.
footers.clear()
return footers
footers[m.group(1)] = m.group(2).strip()
return footers
class GitFailedException(Exception):
pass
def Strip(f):
def new_f(*args, **kwargs):
result = f(*args, **kwargs)
if result is None:
return result
else:
return result.strip()
return new_f
def MakeArgs(l):
"""['-a', '', 'abc', ''] -> '-a abc'"""
return " ".join(filter(None, l))
def Quoted(s):
return "\"%s\"" % s
class GitRecipesMixin(object):
def GitIsWorkdirClean(self, **kwargs):
return self.Git("status -s -uno", **kwargs).strip() == ""
@Strip
def GitBranch(self, **kwargs):
return self.Git("branch", **kwargs)
def GitCreateBranch(self, name, remote="", **kwargs):
assert name
remote_args = ["--upstream", remote] if remote else []
self.Git(MakeArgs(["new-branch", name] + remote_args), **kwargs)
def GitDeleteBranch(self, name, **kwargs):
assert name
self.Git(MakeArgs(["branch -D", name]), **kwargs)
def GitReset(self, name, **kwargs):
assert name
self.Git(MakeArgs(["reset --hard", name]), **kwargs)
def GitStash(self, **kwargs):
self.Git(MakeArgs(["stash"]), **kwargs)
def GitRemotes(self, **kwargs):
return map(str.strip,
self.Git(MakeArgs(["branch -r"]), **kwargs).splitlines())
def GitCheckout(self, name, **kwargs):
assert name
self.Git(MakeArgs(["checkout -f", name]), **kwargs)
def GitCheckoutFile(self, name, branch_or_hash, **kwargs):
assert name
assert branch_or_hash
self.Git(MakeArgs(["checkout -f", branch_or_hash, "--", name]), **kwargs)
def GitCheckoutFileSafe(self, name, branch_or_hash, **kwargs):
try:
self.GitCheckoutFile(name, branch_or_hash, **kwargs)
except GitFailedException: # pragma: no cover
# The file doesn't exist in that revision.
return False
return True
def GitChangedFiles(self, git_hash, **kwargs):
assert git_hash
try:
files = self.Git(MakeArgs(["diff --name-only",
git_hash,
"%s^" % git_hash]), **kwargs)
return map(str.strip, files.splitlines())
except GitFailedException: # pragma: no cover
# Git fails using "^" at branch roots.
return []
@Strip
def GitCurrentBranch(self, **kwargs):
for line in self.Git("status -s -b -uno", **kwargs).strip().splitlines():
match = re.match(r"^## (.+)", line)
if match: return match.group(1)
raise Exception("Couldn't find curent branch.") # pragma: no cover
@Strip
def GitLog(self, n=0, format="", grep="", git_hash="", parent_hash="",
branch="", reverse=False, **kwargs):
assert not (git_hash and parent_hash)
args = ["log"]
if n > 0:
args.append("-%d" % n)
if format:
args.append("--format=%s" % format)
if grep:
args.append("--grep=\"%s\"" % grep.replace("\"", "\\\""))
if reverse:
args.append("--reverse")
if git_hash:
args.append(git_hash)
if parent_hash:
args.append("%s^" % parent_hash)
args.append(branch)
return self.Git(MakeArgs(args), **kwargs)
def GitGetPatch(self, git_hash, **kwargs):
assert git_hash
return self.Git(MakeArgs(["log", "-1", "-p", git_hash]), **kwargs)
# TODO(machenbach): Unused? Remove.
def GitAdd(self, name, **kwargs):
assert name
self.Git(MakeArgs(["add", Quoted(name)]), **kwargs)
def GitApplyPatch(self, patch_file, reverse=False, **kwargs):
assert patch_file
args = ["apply --index --reject"]
if reverse:
args.append("--reverse")
args.append(Quoted(patch_file))
self.Git(MakeArgs(args), **kwargs)
def GitUpload(self, reviewer="", author="", force=False, cq=False,
bypass_hooks=False, cc="", **kwargs):
args = ["cl upload --send-mail"]
if author:
args += ["--email", Quoted(author)]
if reviewer:
args += ["-r", Quoted(reviewer)]
if force:
args.append("-f")
if cq:
args.append("--use-commit-queue")
if bypass_hooks:
args.append("--bypass-hooks")
if cc:
args += ["--cc", Quoted(cc)]
# TODO(machenbach): Check output in forced mode. Verify that all required
# base files were uploaded, if not retry.
self.Git(MakeArgs(args), pipe=False, **kwargs)
def GitCommit(self, message="", file_name="", author=None, **kwargs):
assert message or file_name
args = ["commit"]
if file_name:
args += ["-aF", Quoted(file_name)]
if message:
args += ["-am", Quoted(message)]
if author:
args += ["--author", "\"%s <%s>\"" % (author, author)]
self.Git(MakeArgs(args), **kwargs)
def GitPresubmit(self, **kwargs):
self.Git("cl presubmit", "PRESUBMIT_TREE_CHECK=\"skip\"", **kwargs)
def GitCLLand(self, **kwargs):
self.Git(
"cl land -f --bypass-hooks", retry_on=lambda x: x is None, **kwargs)
def GitDiff(self, loc1, loc2, **kwargs):
return self.Git(MakeArgs(["diff", loc1, loc2]), **kwargs)
def GitPull(self, **kwargs):
self.Git("pull", **kwargs)
def GitFetchOrigin(self, **kwargs):
self.Git("fetch origin", **kwargs)
@Strip
# Copied from bot_update.py and modified for svn-like numbers only.
def GetCommitPositionNumber(self, git_hash, **kwargs):
"""Dumps the 'git' log for a specific revision and parses out the commit
position number.
If a commit position metadata key is found, its number will be returned.
Otherwise, we will search for a 'git-svn' metadata entry. If one is found,
its SVN revision value is returned.
"""
git_log = self.GitLog(format='%B', n=1, git_hash=git_hash, **kwargs)
footer_map = GetCommitMessageFooterMap(git_log)
# Search for commit position metadata
value = footer_map.get(COMMIT_POSITION_FOOTER_KEY)
if value:
match = COMMIT_POSITION_RE.match(value)
if match:
return match.group(2)
# Extract the svn revision from 'git-svn' metadata
value = footer_map.get(GIT_SVN_ID_FOOTER_KEY)
if value:
match = GIT_SVN_ID_RE.match(value)
if match:
return match.group(1)
raise GitFailedException("Couldn't determine commit position for %s" %
git_hash)