pungi/pypungi/__init__.py

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#!/usr/bin/python -tt
# 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; 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 Library 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.
import logging
import os
import subprocess
import shutil
import sys
class PungiBase(object):
"""The base Pungi class. Set up config items and logging here"""
def __init__(self, config):
self.config = config
self.doLoggerSetup()
self.workdir = os.path.join(self.config.get('default', 'destdir'),
'work',
self.config.get('default', 'flavor'),
self.config.get('default', 'arch'))
def doLoggerSetup(self):
"""Setup our logger"""
logdir = os.path.join(self.config.get('default', 'destdir'), 'logs')
_ensuredir(logdir, None, force=True) # Always allow logs to be written out
if self.config.get('default', 'flavor'):
logfile = os.path.join(logdir, '%s.%s.log' % (self.config.get('default', 'flavor'),
self.config.get('default', 'arch')))
else:
logfile = os.path.join(logdir, '%s.log' % (self.config.get('default', 'arch')))
# Create the root logger, that will log to our file
logging.basicConfig(level=logging.DEBUG,
format='%(name)s.%(levelname)s: %(message)s',
filename=logfile)
def _doRunCommand(command, logger, rundir='/tmp', output=subprocess.PIPE, error=subprocess.PIPE, env=None):
"""Run a command and log the output. Error out if we get something on stderr"""
logger.info("Running %s" % ' '.join(command))
p1 = subprocess.Popen(command, cwd=rundir, stdout=output, stderr=error, universal_newlines=True, env=env)
(out, err) = p1.communicate()
if out:
logger.debug(out)
if p1.returncode != 0:
logger.error("Got an error from %s" % command[0])
logger.error(err)
raise OSError, "Got an error from %s: %s" % (command[0], err)
def _link(local, target, logger, force=False):
"""Simple function to link or copy a package, removing target optionally."""
if os.path.exists(target) and force:
os.remove(target)
try:
os.link(local, target)
except OSError, e:
if e.errno != 18: # EXDEV
logger.error('Got an error linking from cache: %s' % e)
raise OSError, e
# Can't hardlink cross file systems
shutil.copy2(local, target)
def _ensuredir(target, logger, force=False, clean=False):
"""Ensure that a directory exists, if it already exists, only continue
if force is set."""
# We have to check existance of a logger, as setting the logger could
# itself cause an issue.
def whoops(func, path, exc_info):
message = 'Could not remove %s' % path
if logger:
logger.error(message)
else:
sys.stderr(message)
sys.exit(1)
if os.path.exists(target) and not os.path.isdir(target):
message = '%s exists but is not a directory.' % target
if logger:
logger.error(message)
else:
sys.stderr(message)
sys.exit(1)
if not os.path.isdir(target):
os.makedirs(target)
elif force and clean:
shutil.rmtree(target, onerror=whoops)
os.makedirs(target)
elif force:
return
else:
message = 'Directory %s already exists. Use --force to overwrite.' % target
if logger:
logger.error(message)
else:
sys.stderr(message)
sys.exit(1)