#!/bin/sh
# commit-msg hook — STRICT DCO enforcement at commit time.
# Every commit must carry a Signed-off-by trailer (git commit -s).
# Install with: scripts/install-git-hooks.sh

if grep -qE '^Signed-off-by: .+ <.+@.+>' "$1"; then
    exit 0
fi

echo "" >&2
echo "COMMIT REJECTED: missing Signed-off-by trailer (Developer Certificate of Origin)." >&2
echo "" >&2
echo "  Sign your commit:        git commit -s" >&2
echo "  Fix the last commit:     git commit --amend -s" >&2
echo "" >&2
echo "The sign-off certifies you have the right to submit this code under the" >&2
echo "project's MIT license — see the DCO file and CONTRIBUTING.md." >&2
exit 1