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support 'diff-only' hooks by passing diff via stdin (#1279)

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Ofer Koren 2020-01-12 21:18:56 +02:00
parent b2faf339ce
commit 4b7f832122
4 changed files with 20 additions and 5 deletions
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10
pre_commit/commands/run.py
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@ -139,10 +139,14 @@ def _run_single_hook(
diff_cmd = ('git', 'diff', '--no-ext-diff')
diff_before = cmd_output_b(*diff_cmd, retcode=None)
if not hook.pass_filenames:
filenames = ()
if hook.pass_diff:
inputs = (diff_before[1],)
elif hook.pass_filenames:
inputs = filenames
else:
inputs = ()
time_before = time.time()
retcode, out = hook.run(filenames, use_color)
retcode, out = hook.run(inputs, use_color)
duration = round(time.time() - time_before, 2) or 0
diff_after = cmd_output_b(*diff_cmd, retcode=None)