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@@ -0,0 +1,31 @@
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+#!/bin/bash
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+# Pre-push: Don't allow commits without Signed-off-by. Skip with "git push --no-verify".
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+set -euo pipefail
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+
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+z40=0000000000000000000000000000000000000000 # magic deleted ref
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+
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+while read local_ref local_sha remote_ref remote_sha
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+do
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+ if [ "$local_sha" != $z40 ]
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+ then
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+ if [ "$remote_sha" = $z40 ]
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+ then
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+ # New branch, examine all commits
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+ range="$(git merge-base master $local_sha)..$local_sha"
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+ else
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+ # Update to existing branch, examine new commits
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+ range="$remote_sha..$local_sha"
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+ fi
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+
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+ # Check for WIP commit
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+ commit=$(git rev-list --grep 'Signed-off-by' --invert-grep "$range")
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+ if [ -n "$commit" ]
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+ then
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+ echo >&2 "Found commits without signoff in $local_ref. Aborting push. Offending commits:"
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+ echo >&2 "$commit"
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+ exit 1
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+ fi
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+ fi
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+done
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+
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+exit 0
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