#!/bin/bash
# git for the shells of CodeCraft agents: `git commit` gets the co-author trailer from
# $CODECRAFT_COMMIT_TRAILER (model, provider, CodeCraft). Everything else goes to the real
# git unchanged. Git itself skips the trailer when the message already ends with it.
real=${CODECRAFT_REAL_GIT:-/usr/bin/git}
[[ -n $CODECRAFT_COMMIT_TRAILER ]] || exec "$real" "$@"
# The subcommand comes after git's global options (-C dir, -c key=value, --git-dir=…).
i=1
while (( i <= $# )); do
  case ${!i} in
    -C | -c | --git-dir | --work-tree | --namespace | --exec-path | --config-env) i=$((i + 2)) ;;
    --) break ;;
    -*) i=$((i + 1)) ;;
    *) break ;;
  esac
done
if (( i <= $# )) && [[ ${!i} == commit ]]; then
  # Right after "commit", so it stays an option even before "-- <paths>".
  exec "$real" "${@:1:i}" --trailer "$CODECRAFT_COMMIT_TRAILER" "${@:i+1}"
fi
exec "$real" "$@"