#!/usr/bin/env bash

usage() {
  cat << EOF
usage: ${0##*/} [command]
    -h | --help         Print this help message.
    -n | --no-push	Do not push submodule changes to upstream.
EOF
}

checkParameters() {
    while [ -n "$1" ]; do
        case $1 in
            -h | --help)
                usage
                exit 0
                ;;
            -n | --no-push)
		        noPush=true
                ;;
            *)
                printf '%s: invalid option %s\n' "${0##*/}" "$1"
                exit 1
                ;;
        esac
        shift
    done
}

updateSubmodules() {
    git submodule update --remote --merge
    gitStatus=$(git status --porcelain)
    grep -q "sadedot" <(echo "$gitStatus") || return
    if [[ -n $noPush && $noPush = true ]]; then
        git commit -m "Update sadedot submodule" sadedot
        git push
    fi
}

runScript() {
    lastFolder=$PWD
    sadedotParentFolder=$(pwd -P | awk '{ sub(/\/sadedot.*/, ""); print }')
    cd "$sadedotParentFolder" || { echo "Couldn't cd into '$sadedotParentFolder'." 1>&2 && exit 1; }

    checkParameters "$@"

    updateSubmodules

    cd "$lastFolder" || { echo "Couldn't cd into '$lastFolder'." 1>&2 && exit 1; }
}

runScript