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#!/usr/bin/env python -tt
#
# Copyright (c) 2011 Intel, Inc.
#
# 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 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
from wic import WicError
logger = logging.getLogger('wic')
def runtool(cmdln_or_args, catch=1):
""" wrapper for most of the subprocess calls
input:
cmdln_or_args: can be both args and cmdln str (shell=True)
catch: 0, quitely run
1, only STDOUT
2, only STDERR
3, both STDOUT and STDERR
return:
(rc, output)
if catch==0: the output will always None
"""
if catch not in (0, 1, 2, 3):
# invalid catch selection, will cause exception, that's good
return None
if isinstance(cmdln_or_args, list):
cmd = cmdln_or_args[0]
shell = False
else:
import shlex
cmd = shlex.split(cmdln_or_args)[0]
shell = True
if catch != 3:
dev_null = os.open("/dev/null", os.O_WRONLY)
if catch == 0:
sout = dev_null
serr = dev_null
elif catch == 1:
sout = subprocess.PIPE
serr = dev_null
elif catch == 2:
sout = dev_null
serr = subprocess.PIPE
elif catch == 3:
sout = subprocess.PIPE
serr = subprocess.STDOUT
try:
process = subprocess.Popen(cmdln_or_args, stdout=sout,
stderr=serr, shell=shell)
(sout, serr) = process.communicate()
# combine stdout and stderr, filter None out and decode
out = ''.join([out.decode('utf-8') for out in [sout, serr] if out])
except OSError as err:
if err.errno == 2:
# [Errno 2] No such file or directory
raise WicError('Cannot run command: %s, lost dependency?' % cmd)
else:
raise # relay
finally:
if catch != 3:
os.close(dev_null)
return (process.returncode, out)
def show(cmdln_or_args):
"""Show all messages using logger.debug."""
rcode, out = runtool(cmdln_or_args, catch=3)
if isinstance(cmdln_or_args, list):
cmd = ' '.join(cmdln_or_args)
else:
cmd = cmdln_or_args
msg = 'running command: "%s"' % cmd
if out:
out = out.strip()
if out:
msg += ', with output::'
msg += '\n +----------------'
for line in out.splitlines():
msg += '\n | %s' % line
msg += '\n +----------------'
logger.debug(msg)
return rcode
def outs(cmdln_or_args, catch=1):
# get the outputs of tools
return runtool(cmdln_or_args, catch)[1].strip()
def quiet(cmdln_or_args):
return runtool(cmdln_or_args, catch=0)[0]
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