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Add first version of "block skip checks" hook #222

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Add first version of "block skip checks" hook #222

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20 changes: 20 additions & 0 deletions pre-receive-hooks/block_skip_checks.sh
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Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
#!/usr/bin/env bash
#
# Check and reject commits with "skip-checks: true" trailer lines.
#
# This hook basically disables the following feature:
# https://help.github.com/articles/about-status-checks/#skipping-and-requesting-checks-for-individual-commits

ERROR_MSG="[POLICY] Skipping checks is not allowed. Please remove trailer lines with \"skip-checks: true\"."

while read OLDREV NEWREV REFNAME ; do
for COMMIT in `git rev-list $OLDREV..$NEWREV`;
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I think this call would fail if you push a new branch as $OLDREV is 40 zeros in that case. See https://github.com/github/platform-samples/blob/master/pre-receive-hooks/block_confidentials.sh#L38

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I would also wonder whether you like to recheck all commits again if somebody was copying a branch and pushing it again with a new commit on top, have a look at https://github.com/github/platform-samples/blob/master/pre-receive-hooks/block_unsigned_commits.sh#L15-L42 for an example how to exclude commits already in the repo

do
MESSAGE=`git cat-file commit $COMMIT | git interpret-trailers --parse`
if echo $MESSAGE | grep -iq "skip-checks: true"; then
echo "$ERROR_MSG" >&2
exit 1
fi
done
done
exit 0