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# Bisect.py
#
# Copyright (C) 2012 Carlos Garcia Campos <carlosgc@gnome.org>
#
# This program 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
from __future__ import absolute_import, division, print_function
from builder import get_builder
from TestRun import TestRun
from Config import Config
import os
import subprocess
import sys
class GitBisect:
def __init__(self, srcdir):
self.srcdir = srcdir
def __run_cmd(self, cmd):
p = subprocess.Popen(cmd, cwd=self.srcdir, stdout=subprocess.PIPE)
stdout, stderr = p.communicate()
if stdout:
sys.stdout.write(stdout)
status = p.returncode
if not os.WIFEXITED(status) or os.WEXITSTATUS(status) != 0:
raise Exception('Command %s returned non-zero exit status %d' % (str(cmd), status))
return stdout
def __finished(self, output):
if not output:
return True
return "is the first bad commit" in output
def start(self, bad=None, good=None):
cmd = ['git', 'bisect', 'start']
if bad is not None:
cmd.append(bad)
if good is not None:
cmd.append(good)
self.__run_cmd(cmd)
def good(self):
cmd = ['git', 'bisect', 'good']
output = self.__run_cmd(cmd)
return self.__finished(output)
def bad(self):
cmd = ['git', 'bisect', 'bad']
output = self.__run_cmd(cmd)
return self.__finished(output)
def reset(self):
cmd = ['git', 'bisect', 'reset']
self.__run_cmd(cmd)
class Bisect:
def __init__(self, test, refsdir, outdir):
self._test = test
self._refsdir = refsdir
self._outdir = outdir
self.config = Config()
self._builder = get_builder(self.config.builder)
# Add run-tests options to config
self.config.keep_results = False
self.config.create_diffs = False
self.config.update_refs = False
def __get_current_revision(self):
p = subprocess.Popen(['git', 'rev-parse', 'HEAD'], cwd=self.config.src_dir, stdout=subprocess.PIPE)
return p.communicate()[0]
def run(self):
bisect = GitBisect(self.config.src_dir)
# TODO: save revision in .md5 files and get the good
# revision from refs when not provided by command line
try:
bisect.start(self.config.bad, self.config.good)
except:
print("Couldn't start git bisect")
return
finished = False
while not finished:
test_runner = TestRun(os.path.dirname(self._test), self._refsdir, self._outdir)
try:
self._builder.build()
except:
print("Impossible to find regression, build is broken in revision: %s" % (self.__get_current_revision()))
break
test_runner.run_test(os.path.basename(self._test))
if test_runner._n_passed == 0:
finished = bisect.bad()
else:
finished = bisect.good()
bisect.reset()
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