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51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
from __future__ import unicode_literals
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import os.path
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import subprocess
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from pre_commit.util import cmd_output
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class PrefixedCommandRunner(object):
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"""A PrefixedCommandRunner allows you to run subprocess commands with
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comand substitution.
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For instance:
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PrefixedCommandRunner('/tmp/foo').run(['{prefix}foo.sh', 'bar', 'baz'])
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will run ['/tmp/foo/foo.sh', 'bar', 'baz']
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"""
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def __init__(
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self,
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prefix_dir,
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popen=subprocess.Popen,
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makedirs=os.makedirs
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):
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self.prefix_dir = prefix_dir.rstrip(os.sep) + os.sep
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self.__popen = popen
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self.__makedirs = makedirs
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def _create_path_if_not_exists(self):
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if not os.path.exists(self.prefix_dir):
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self.__makedirs(self.prefix_dir)
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def run(self, cmd, **kwargs):
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self._create_path_if_not_exists()
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replaced_cmd = [
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part.replace('{prefix}', self.prefix_dir) for part in cmd
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]
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return cmd_output(*replaced_cmd, __popen=self.__popen, **kwargs)
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def path(self, *parts):
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path = os.path.join(self.prefix_dir, *parts)
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return os.path.normpath(path)
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def exists(self, *parts):
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return os.path.exists(self.path(*parts))
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def star(self, end):
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return tuple(
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path for path in os.listdir(self.prefix_dir) if path.endswith(end)
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)
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