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# This code is mostly duplicated from the `gitlint.shell` module. We conciously duplicate this code as to not depend
# on gitlint internals for our integration testing framework.
import subprocess
from qa.utils import USE_SH_LIB, DEFAULT_ENCODING
if USE_SH_LIB:
from sh import git, echo, gitlint # pylint: disable=unused-import,no-name-in-module,import-error
gitlint = gitlint.bake(_unify_ttys=True, _tty_in=True) # pylint: disable=invalid-name
# import exceptions separately, this makes it a little easier to mock them out in the unit tests
from sh import CommandNotFound, ErrorReturnCode, RunningCommand # pylint: disable=import-error
else:
class CommandNotFound(Exception):
""" Exception indicating a command was not found during execution """
pass
class RunningCommand:
pass
class ShResult(RunningCommand):
""" Result wrapper class. We use this to more easily migrate from using https://amoffat.github.io/sh/ to using
the builtin subprocess module. """
def __init__(self, full_cmd, stdout, stderr='', exitcode=0):
self.full_cmd = full_cmd
# TODO(jorisroovers): The 'sh' library by default will merge stdout and stderr. We mimic this behavior
# for now until we fully remove the 'sh' library.
self.stdout = stdout + stderr.decode(DEFAULT_ENCODING)
self.stderr = stderr
self.exit_code = exitcode
def __str__(self):
return self.stdout
class ErrorReturnCode(ShResult, Exception):
""" ShResult subclass for unexpected results (acts as an exception). """
pass
def git(*command_parts, **kwargs):
return run_command("git", *command_parts, **kwargs)
def echo(*command_parts, **kwargs):
return run_command("echo", *command_parts, **kwargs)
def gitlint(*command_parts, **kwargs):
return run_command("gitlint", *command_parts, **kwargs)
def run_command(command, *args, **kwargs):
args = [command] + list(args)
result = _exec(*args, **kwargs)
# If we reach this point and the result has an exit_code that is larger than 0, this means that we didn't
# get an exception (which is the default sh behavior for non-zero exit codes) and so the user is expecting
# a non-zero exit code -> just return the entire result
if hasattr(result, 'exit_code') and result.exit_code > 0:
return result
return str(result)
def _exec(*args, **kwargs):
pipe = subprocess.PIPE
popen_kwargs = {'stdout': pipe, 'stderr': pipe, 'shell': kwargs.get('_tty_out', False)}
if '_cwd' in kwargs:
popen_kwargs['cwd'] = kwargs['_cwd']
if '_env' in kwargs:
popen_kwargs['env'] = kwargs['_env']
try:
with subprocess.Popen(args, **popen_kwargs) as p:
result = p.communicate()
except FileNotFoundError as exc:
raise CommandNotFound from exc
exit_code = p.returncode
stdout = result[0].decode(DEFAULT_ENCODING)
stderr = result[1] # 'sh' does not decode the stderr bytes to unicode
full_cmd = '' if args is None else ' '.join(args)
# If not _ok_code is specified, then only a 0 exit code is allowed
ok_exit_codes = kwargs.get('_ok_code', [0])
if exit_code in ok_exit_codes:
return ShResult(full_cmd, stdout, stderr, exit_code)
# Unexpected error code => raise ErrorReturnCode
raise ErrorReturnCode(full_cmd, stdout, stderr, p.returncode)
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