'''Execute commands within a docker container

ARCH = platform.machine()

if image.endswith(ARCH):

bash_arg = '/pwd/run.sh'

elif image.endswith('i686') and ARCH == 'x86_64':

bash_arg = '-c "linux32 /pwd/run.sh"'

elif image.endswith('x86_64') and ARCH == 'i686':

bash_arg = '-c "linux64 /pwd/run.sh"'

else:

raise ValueError('Unsupported Docker image: ' + image)

log('PULL', image)

system(('docker', 'pull', image))

script = [

'set -e',

'trap "chown -R {:}:{:} *" EXIT'.format(os.getuid(),

os.getgid()),

'cd /pwd'

]

script += extra_cmds

with open('run.sh', 'w') as f:

f.write(os.linesep.join(script))

os.chmod('run.sh', stat.S_IRWXU)

cmd = ' '.join(('docker', 'run', '--mount',

'type=bind,source={:},target=/pwd'.format(os.getcwd()),

image, '/bin/bash', bash_arg))

if capture:

opts = {'stderr': subprocess.PIPE, 'stdout': subprocess.PIPE}

else:

opts = {}

log('RUN', image)

p = subprocess.Popen(cmd, shell=True, **opts)

r = p.communicate()

if p.returncode != 0:

if p.returncode == 139:

sys.stderr.write("segmentation fault when running Docker (139)\n")

sys.exit(p.returncode)

if capture: