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# Copyright (C) 2018 Lars Wirzenius
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import logging
import os
import subprocess
import cliapp
class Runner:
def __init__(self, reporter, maxbuf=128*1024):
self._reporter = reporter
self._buffers = {
'stdout': b'',
'stderr': b'',
}
self._maxbuf = maxbuf
self._timeout = 1.0
def runcmd(self, *argvs, **kwargs):
for argv in argvs:
logging.debug('Runner.runcmd: argv: %r', argv)
for key in kwargs:
logging.debug('Runner.runcmd: kwargs: %r=%r', key, kwargs[key])
assert all(argv is not None for argv in argvs)
with open('/dev/null', 'rb') as devnull:
exit_code, _, _ = cliapp.runcmd_unchecked(
*argvs,
stdin=devnull,
stdout_callback=self.capture_stdout,
stderr=subprocess.STDOUT,
output_timeout=self._timeout,
timeout_callback=self.flush,
**kwargs
)
self.flush()
logging.debug('Runner.runcmd: finished, exit code: %d', exit_code)
return exit_code
def capture_stdout(self, data):
return self.capture('stdout', data)
def capture(self, stream_name, data):
self._buffers[stream_name] += data
if len(self._buffers[stream_name]) >= self._maxbuf:
self.flush()
return b''
def flush(self):
stdout = self._buffers['stdout']
stderr = self._buffers['stderr']
self._reporter.report(None, stdout, stderr)
self._buffers['stdout'] = b''
self._buffers['stderr'] = b''
class Mounter: # pragma: no cover
def __init__(self, mounts, runner):
self._mounts = mounts
self._runner = runner
def __enter__(self):
self.mount()
return self
def __exit__(self, *args):
self.unmount()
def mount(self):
for dirname, mp in self._mounts:
if not os.path.exists(mp):
os.mkdir(mp)
self._runner.runcmd(['sudo', 'mount', '--bind', dirname, mp])
def unmount(self):
for dirname, mp in reversed(self._mounts):
try:
self._runner.runcmd(['sudo', 'umount', mp])
except BaseException as e:
logging.error(
'Ignoring error while unmounting %s: %s', mp, str(e))
class ActionEnvironment: # pragma: no cover
def __init__(self, systree, workspace, reporter):
super().__init__()
self._systree = systree
self._workspace = workspace
self._reporter = reporter
self._extra_env = {}
def set_extra_env(self, extra_env):
self._extra_env = dict(extra_env)
def get_systree_directory(self):
return self._systree
def get_workspace_directory(self):
return self._workspace
def get_mounts(self):
return []
def report(self, exit_code, msg):
self._reporter.report(exit_code, msg, None)
def runcmd(self, argv):
raise NotImplementedError()
def host_runcmd(self, *argvs, cwd=None):
env = self.get_env_vars()
runner = Runner(self._reporter)
mounts = self.get_mounts()
with Mounter(mounts, runner):
return runner.runcmd(*argvs, cwd=cwd, env=env)
def get_env_vars(self):
return dict(self._extra_env)
class HostEnvironment(ActionEnvironment):
def runcmd(self, argv):
return self.host_runcmd(argv, cwd=self._workspace)
class ChrootEnvironment(ActionEnvironment):
def runcmd(self, argv):
prefix = ['sudo', 'chroot', self._workspace]
return self.host_runcmd(prefix + argv)
class ContainerEnvironment(ActionEnvironment):
def runcmd(self, argv):
bind = '{}:/workspace'.format(self._workspace)
prefix = [
'sudo', 'systemd-nspawn',
'-D', self._systree,
'--bind', bind,
'--chdir', '/workspace',
]
env = self.get_env_vars()
for key in env: # pragma: no cover
var = '{}={}'.format(key, env[key])
prefix.extend(['--setenv', var])
return self.host_runcmd(prefix + argv)
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