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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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4
pre_commit/languages/helpers.py
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@ -106,4 +106,8 @@ def run_xargs(
# but do it deterministically in case a hook cares about ordering.
file_args = _shuffled(file_args)
kwargs['target_concurrency'] = target_concurrency(hook)
if hook.pass_diff:
input_data, = file_args
kwargs['input_data'] = input_data
file_args = ()
return xargs(cmd, file_args, **kwargs)