mirror of
https://github.com/pre-commit/pre-commit.git
synced 2026-01-13 12:30:08 -06:00
87 lines
2.6 KiB
Python
87 lines
2.6 KiB
Python
|
|
import os
|
|
import os.path
|
|
import subprocess
|
|
|
|
|
|
class CalledProcessError(RuntimeError):
|
|
def __init__(self, returncode, cmd, expected_returncode, output=None):
|
|
self.returncode = returncode
|
|
self.cmd = cmd
|
|
self.expected_returncode = expected_returncode
|
|
self.output = output
|
|
|
|
def __str__(self):
|
|
return (
|
|
'Command: {0!r}\n'
|
|
'Return code: {1}\n'
|
|
'Expected return code {2}\n',
|
|
'Output: {3!r}\n'.format(
|
|
self.cmd,
|
|
self.returncode,
|
|
self.expected_returncode,
|
|
self.output,
|
|
),
|
|
)
|
|
|
|
|
|
def _replace_cmd(cmd, **kwargs):
|
|
return [part.format(**kwargs) for part in cmd]
|
|
|
|
|
|
class PrefixedCommandRunner(object):
|
|
"""A PrefixedCommandRunner allows you to run subprocess commands with
|
|
comand substitution.
|
|
|
|
For instance:
|
|
PrefixedCommandRunner('/tmp/foo').run(['{prefix}foo.sh', 'bar', 'baz'])
|
|
|
|
will run ['/tmpl/foo/foo.sh', 'bar', 'baz']
|
|
"""
|
|
def __init__(self, prefix_dir, popen=subprocess.Popen, makedirs=os.makedirs):
|
|
self.prefix_dir = prefix_dir.rstrip(os.sep) + os.sep
|
|
self.__popen = popen
|
|
self.__makedirs = makedirs
|
|
|
|
def _create_path_if_not_exists(self):
|
|
if not os.path.exists(self.prefix_dir):
|
|
self.__makedirs(self.prefix_dir)
|
|
|
|
def run(self, cmd, retcode=0, stdin=None, **kwargs):
|
|
self._create_path_if_not_exists()
|
|
replaced_cmd = _replace_cmd(cmd, prefix=self.prefix_dir)
|
|
proc = self.__popen(
|
|
replaced_cmd,
|
|
stdin=subprocess.PIPE,
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE,
|
|
**kwargs
|
|
)
|
|
stdout, stderr = proc.communicate(stdin)
|
|
returncode = proc.returncode
|
|
|
|
if retcode is not None and retcode != returncode:
|
|
raise CalledProcessError(
|
|
returncode, replaced_cmd, retcode, output=(stdout, stderr),
|
|
)
|
|
|
|
return proc.returncode, stdout, stderr
|
|
|
|
def path(self, *parts):
|
|
path = os.path.join(self.prefix_dir, *parts)
|
|
return os.path.normpath(path)
|
|
|
|
def exists(self, *parts):
|
|
return os.path.exists(self.path(*parts))
|
|
|
|
@classmethod
|
|
def from_command_runner(cls, command_runner, path_end):
|
|
"""Constructs a new command runner from an existing one by appending
|
|
`path_end` to the command runner's prefix directory.
|
|
"""
|
|
return cls(
|
|
command_runner.path(path_end),
|
|
popen=command_runner.__popen,
|
|
makedirs=command_runner.__makedirs,
|
|
)
|