mirror of
https://github.com/pre-commit/pre-commit.git
synced 2026-01-13 12:30:08 -06:00
58 lines
1.6 KiB
Python
58 lines
1.6 KiB
Python
from __future__ import unicode_literals
|
|
|
|
import os
|
|
import os.path
|
|
import subprocess
|
|
|
|
from pre_commit.util import cmd_output
|
|
|
|
|
|
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 ['/tmp/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, **kwargs):
|
|
self._create_path_if_not_exists()
|
|
replaced_cmd = [
|
|
part.replace('{prefix}', self.prefix_dir) for part in cmd
|
|
]
|
|
return cmd_output(*replaced_cmd, __popen=self.__popen, **kwargs)
|
|
|
|
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,
|
|
)
|