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Implement 'negate' to simplify pcre

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This commit is contained in:
Anthony Sottile 2016-03-21 19:56:41 -07:00
parent b7d395410b
commit a932315a15
5 changed files with 51 additions and 39 deletions
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26
pre_commit/languages/pcre.py
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@ -2,7 +2,6 @@ from __future__ import unicode_literals
from sys import platform
from pre_commit.util import shell_escape
from pre_commit.xargs import xargs
@ -19,21 +18,12 @@ def install_environment(
def run_hook(repo_cmd_runner, hook, file_args):
grep_command = '{0} -H -n -P'.format(
'ggrep' if platform == 'darwin' else 'grep',
)
# For PCRE the entry is the regular expression to match
return xargs(
(
'sh', '-c',
# Grep usually returns 0 for matches, and nonzero for non-matches
# so we flip it here.
'! {0} {1} {2} $@'.format(
grep_command, ' '.join(hook['args']),
shell_escape(hook['entry']),
),
'--',
),
file_args,
)
cmd = (
'ggrep' if platform == 'darwin' else 'grep',
'-H', '-n', '-P',
) + tuple(hook['args']) + (hook['entry'],)
# Grep usually returns 0 for matches, and nonzero for non-matches so we
# negate it here.
return xargs(cmd, file_args, negate=True)