#!/bin/sh
set -eu

PROGNAME=$(basename "$0")
usage() {
    cat <<EOF
usage:
    ${PROGNAME} [REPO]
EOF
}

if [ "$#" -eq 0 ]; then
    REPO="$(pwd)"
elif [ "$#" -eq 1 ]; then
    REPO="${1}"
else
    usage
    exit 1
fi

(cd "${REPO}" && git log --format='%aI' | mf "$(which average-commit-time.mf)")