space-android/scripts/hooks/pre-push

#!/bin/bash
# Pre-push: Don't allow commits without Signed-off-by. Skip with "git push --no-verify".
set -euo pipefail

z40=0000000000000000000000000000000000000000 # magic deleted ref

while read local_ref local_sha remote_ref remote_sha
do
	if [ "$local_sha" != $z40 ]
	then
		if [ "$remote_sha" = $z40 ]
		then
			# New branch, examine all commits
			range="$(git merge-base master $local_sha)..$local_sha"
		else
			# Update to existing branch, examine new commits
			range="$remote_sha..$local_sha"
		fi

		# Check for WIP commit
		commit=$(git rev-list --grep 'Signed-off-by' --invert-grep "$range")
		if [ -n "$commit" ]
		then
			echo >&2 "Found commits without signoff in $local_ref. Aborting push. Offending commits:"
			echo >&2 "$commit"
			exit 1
		fi
	fi
done

exit 0