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# This file is part of Buildbot. Buildbot is free software: you can
# redistribute it and/or modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation, version 2.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright Buildbot Team Members
from __future__ import absolute_import
from __future__ import print_function
from future.moves.urllib.parse import quote as urlquote
from future.utils import itervalues
from future.utils import text_type
import os
import re
from twisted.internet import defer
from twisted.internet import utils
from twisted.python import log
from buildbot import config
from buildbot.changes import base
from buildbot.util import ascii2unicode
from buildbot.util import bytes2NativeString
from buildbot.util import bytes2unicode
from buildbot.util import unicode2bytes
from buildbot.util.state import StateMixin
class GitError(Exception):
"""Raised when git exits with code 128."""
class GitPoller(base.PollingChangeSource, StateMixin):
"""This source will poll a remote git repo for changes and submit
them to the change master."""
compare_attrs = ("repourl", "branches", "workdir",
"pollInterval", "gitbin", "usetimestamps",
"category", "project", "pollAtLaunch",
"buildPushesWithNoCommits")
def __init__(self, repourl, branches=None, branch=None,
workdir=None, pollInterval=10 * 60,
gitbin='git', usetimestamps=True,
category=None, project=None,
pollinterval=-2, fetch_refspec=None,
encoding='utf-8', name=None, pollAtLaunch=False,
buildPushesWithNoCommits=False, only_tags=False):
# for backward compatibility; the parameter used to be spelled with 'i'
if pollinterval != -2:
pollInterval = pollinterval
if name is None:
name = repourl
base.PollingChangeSource.__init__(self, name=name,
pollInterval=pollInterval,
pollAtLaunch=pollAtLaunch)
if project is None:
project = ''
if only_tags and (branch or branches):
config.error("GitPoller: can't specify only_tags and branch/branches")
if branch and branches:
config.error("GitPoller: can't specify both branch and branches")
elif branch:
branches = [branch]
elif not branches:
if only_tags:
branches = lambda ref: ref.startswith('refs/tags/')
else:
branches = ['master']
self.repourl = repourl
self.branches = branches
self.encoding = encoding
self.buildPushesWithNoCommits = buildPushesWithNoCommits
self.gitbin = gitbin
self.workdir = workdir
self.usetimestamps = usetimestamps
self.category = category if callable(
category) else ascii2unicode(category)
self.project = ascii2unicode(project)
self.changeCount = 0
self.lastRev = {}
if fetch_refspec is not None:
config.error("GitPoller: fetch_refspec is no longer supported. "
"Instead, only the given branches are downloaded.")
if self.workdir is None:
self.workdir = 'gitpoller-work'
def activate(self):
# make our workdir absolute, relative to the master's basedir
if not os.path.isabs(self.workdir):
self.workdir = os.path.join(self.master.basedir, self.workdir)
log.msg("gitpoller: using workdir '%s'" % self.workdir)
d = self.getState('lastRev', {})
@d.addCallback
def setLastRev(lastRev):
self.lastRev = lastRev
d.addCallback(lambda _: base.PollingChangeSource.activate(self))
d.addErrback(log.err, 'while initializing GitPoller repository')
return d
def describe(self):
str = ('GitPoller watching the remote git repository ' +
bytes2NativeString(self.repourl, self.encoding))
if self.branches:
if self.branches is True:
str += ', branches: ALL'
elif not callable(self.branches):
str += ', branches: ' + ', '.join(self.branches)
if not self.master:
str += " [STOPPED - check log]"
return str
def _getBranches(self):
d = self._dovccmd('ls-remote', [self.repourl])
@d.addCallback
def parseRemote(rows):
branches = []
for row in rows.splitlines():
if '\t' not in row:
# Not a useful line
continue
sha, ref = row.split("\t")
branches.append(ref)
return branches
return d
def _headsFilter(self, branch):
"""Filter out remote references that don't begin with 'refs/heads'."""
return branch.startswith("refs/heads/")
def _removeHeads(self, branch):
"""Remove 'refs/heads/' prefix from remote references."""
if branch.startswith("refs/heads/"):
branch = branch[11:]
return branch
def _trackerBranch(self, branch):
return "refs/buildbot/%s/%s" % (urlquote(self.repourl, ''),
self._removeHeads(branch))
@defer.inlineCallbacks
def poll(self):
try:
yield self._dovccmd('init', ['--bare', self.workdir])
except GitError as e:
log.msg(e.args[0])
return
branches = self.branches
if branches is True or callable(branches):
branches = yield self._getBranches()
if callable(self.branches):
branches = [b for b in branches if self.branches(b)]
else:
branches = [b for b in branches if self._headsFilter(b)]
refspecs = [
'+%s:%s' % (self._removeHeads(branch), self._trackerBranch(branch))
for branch in branches
]
try:
yield self._dovccmd('fetch', [self.repourl] + refspecs,
path=self.workdir)
except GitError as e:
log.msg(e.args[0])
return
revs = {}
log.msg('gitpoller: processing changes from "%s"' % (self.repourl,))
for branch in branches:
try:
rev = yield self._dovccmd(
'rev-parse', [self._trackerBranch(branch)], path=self.workdir)
revs[branch] = bytes2NativeString(rev, self.encoding)
yield self._process_changes(revs[branch], branch)
except Exception:
log.err(_why="trying to poll branch %s of %s"
% (branch, self.repourl))
self.lastRev.update(revs)
yield self.setState('lastRev', self.lastRev)
def _decode(self, git_output):
return bytes2unicode(git_output, self.encoding)
def _get_commit_comments(self, rev):
args = ['--no-walk', r'--format=%s%n%b', rev, '--']
d = self._dovccmd('log', args, path=self.workdir)
d.addCallback(self._decode)
return d
def _get_commit_timestamp(self, rev):
# unix timestamp
args = ['--no-walk', r'--format=%ct', rev, '--']
d = self._dovccmd('log', args, path=self.workdir)
@d.addCallback
def process(git_output):
if self.usetimestamps:
try:
stamp = int(git_output)
except Exception as e:
log.msg(
'gitpoller: caught exception converting output \'%s\' to timestamp' % git_output)
raise e
return stamp
else:
return None
return d
def _get_commit_files(self, rev):
args = ['--name-only', '--no-walk', r'--format=%n', rev, '--']
d = self._dovccmd('log', args, path=self.workdir)
def decode_file(file):
# git use octal char sequences in quotes when non ASCII
match = re.match('^"(.*)"$', file)
if match:
file = bytes2unicode(match.groups()[0], 'unicode_escape')
return self._decode(file)
@d.addCallback
def process(git_output):
fileList = [decode_file(file)
for file in
[s for s in git_output.splitlines() if len(s)]]
return fileList
return d
def _get_commit_author(self, rev):
args = ['--no-walk', r'--format=%aN <%aE>', rev, '--']
d = self._dovccmd('log', args, path=self.workdir)
@d.addCallback
def process(git_output):
git_output = self._decode(git_output)
if len(git_output) == 0:
raise EnvironmentError('could not get commit author for rev')
return git_output
return d
@defer.inlineCallbacks
def _process_changes(self, newRev, branch):
"""
Read changes since last change.
- Read list of commit hashes.
- Extract details from each commit.
- Add changes to database.
"""
# initial run, don't parse all history
if not self.lastRev:
return
rebuild = False
if newRev in itervalues(self.lastRev):
if self.buildPushesWithNoCommits:
existingRev = self.lastRev.get(branch)
if existingRev is None:
# This branch was completely unknown, rebuild
log.msg('gitpoller: rebuilding %s for new branch "%s"' %
(newRev, branch))
rebuild = True
elif existingRev != newRev:
# This branch is known, but it now points to a different
# commit than last time we saw it, rebuild.
log.msg('gitpoller: rebuilding %s for updated branch "%s"' %
(newRev, branch))
rebuild = True
# get the change list
revListArgs = ([b'--format=%H', r'%s' % newRev] +
[b'^' + unicode2bytes(rev, 'ascii', 'ignore')
for rev in sorted(itervalues(self.lastRev))] +
[b'--'])
self.changeCount = 0
results = yield self._dovccmd('log', revListArgs, path=self.workdir)
# process oldest change first
revList = results.split()
revList.reverse()
if rebuild and len(revList) == 0:
revList = [newRev]
self.changeCount = len(revList)
self.lastRev[branch] = newRev
if self.changeCount:
log.msg('gitpoller: processing %d changes: %s from "%s" branch "%s"'
% (self.changeCount, revList, self.repourl, branch))
for rev in revList:
dl = defer.DeferredList([
self._get_commit_timestamp(rev),
self._get_commit_author(rev),
self._get_commit_files(rev),
self._get_commit_comments(rev),
], consumeErrors=True)
results = yield dl
# check for failures
failures = [r[1] for r in results if not r[0]]
if failures:
for failure in failures:
log.err(
failure, "while processing changes for {} {}".format(newRev, branch))
# just fail on the first error; they're probably all related!
failures[0].raiseException()
timestamp, author, files, comments = [r[1] for r in results]
yield self.master.data.updates.addChange(
author=author, revision=ascii2unicode(rev), files=files,
comments=comments, when_timestamp=timestamp,
branch=ascii2unicode(self._removeHeads(branch)),
project=self.project, repository=ascii2unicode(self.repourl),
category=self.category, src=u'git')
def _dovccmd(self, command, args, path=None):
def encodeArg(arg):
if isinstance(arg, list):
return [encodeArg(a) for a in arg]
elif isinstance(arg, text_type):
return arg.encode("ascii")
return arg
d = utils.getProcessOutputAndValue(encodeArg(self.gitbin),
encodeArg([command] + args),
path=encodeArg(path), env=os.environ)
def _convert_nonzero_to_failure(res,
command,
args,
path):
"utility to handle the result of getProcessOutputAndValue"
(stdout, stderr, code) = res
stdout = bytes2NativeString(stdout, self.encoding)
stderr = bytes2NativeString(stderr, self.encoding)
args = bytes2NativeString(args, self.encoding)
if code != 0:
if code == 128:
raise GitError('command %s %s in %s on repourl %s failed with exit code %d: %s'
% (command, args, path, self.repourl, code, stderr))
raise EnvironmentError('command %s %s in %s on repourl %s failed with exit code %d: %s'
% (command, args, path, self.repourl, code, stderr))
return stdout.strip()
d.addCallback(_convert_nonzero_to_failure,
command,
args,
path)
return d