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Add a --show-diff-on-failure option

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This commit is contained in:
Anthony Sottile 2017-02-25 10:14:17 -08:00
parent 0ece39c484
commit 05c88738b0
3 changed files with 32 additions and 1 deletions
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8
pre_commit/commands/run.py
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@ -3,6 +3,7 @@ from __future__ import unicode_literals
import logging
import os
import subprocess
import sys
from pre_commit import color
@ -152,6 +153,13 @@ def _run_hooks(repo_hooks, args, environ):
retval = 0
for repo, hook in repo_hooks:
retval |= _run_single_hook(hook, repo, args, skips, cols)
if (
retval and
args.show_diff_on_failure and
subprocess.call(('git', 'diff', '--quiet')) != 0
):
print('All changes made by hooks:')
subprocess.call(('git', 'diff'))
return retval