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# Copyright (C) 2011 Codethink Limited
#
# 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.
#
# 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.
import logging
import os
import subprocess
import morphlib
class CommandFailure(Exception):
pass
class Execute(object):
'''Execute commands for morph.'''
def __init__(self, dirname, msg):
self._setup_env()
self.dirname = dirname
self.msg = msg
def _setup_env(self):
self.env = dict(os.environ)
def run(self, commands):
'''Execute a list of commands.
If a command fails (returns non-zero exit code), the rest are
not run, and CommandFailure is returned.
'''
stdouts = []
for command in commands:
self.msg('# %s' % command)
p = subprocess.Popen([command], shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
env=self.env,
cwd=self.dirname)
out, err = p.communicate()
logging.debug('Exit code: %d' % p.returncode)
logging.debug('Standard output:\n%s' % morphlib.util.indent(out))
logging.debug('Standard error:\n%s' % morphlib.util.indent(err))
if p.returncode != 0:
raise CommandFailure('Command failed: %s\n%s' %
(command, morphlib.util.indent(err)))
stdouts.append(out)
return stdouts
def runv(self, argv):
'''Run a command given as a list of argv elements.
Return standard output. Raise ``CommandFailure`` if the command
fails. Log standard output and error in any case.
'''
self.msg('# %s' % ' '.join(argv))
p = subprocess.Popen(argv, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, err = p.communicate()
logging.debug('Exit code: %d' % p.returncode)
logging.debug('Standard output:\n%s' % morphlib.util.indent(out))
logging.debug('Standard error:\n%s' % morphlib.util.indent(err))
if p.returncode != 0:
raise CommandFailure('Command failed: %s\n%s' %
(argv, morphlib.util.indent(err)))
return out
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