#!/usr/bin/env bash

git_root() {
  git rev-parse --show-toplevel
}

# get the relative path of current path according to root of repo
git_root_relative() {
    rel=$(git rev-parse --show-prefix)
    if [ -z "$rel" ]; then
        # git rev-parse --show-prefix will output empty string when we are in the root dir
        echo "."
    else
        echo "$rel"
    fi
}

if test $# -eq 0; then
    git_root
else
    case "$1" in
    -r|--relative)
        git_root_relative
        ;;
    *)
        git_root
        ;;
    esac
fi