#!/usr/bin/env bash
# docpp_make
# wrapper script for generating distro packages

proj="docpp"
prefix="${prefix:-/usr}"
release="${release:-Release}"

clean() {
    rm -rf ./*.zst* ./*.tar* ./*.sig* *.PKGBUILD *.ebuild *.ebuild* build/ PKGBUILD
}

check_correct_dir() {
    [ ! -d ".git" ] && printf "Incorrect directory.\n" && exit 1
}

gen_pkg() {
    [ "$(id -u)" = "0" ] && printf "Do not run as root.\n" && exit 1
    version="${version:-$(grep project CMakeLists.txt | sed "s/project(${proj} VERSION //g")}"

    if [ ! -e ".git" ]; then
        printf "This is not a git repository.\n"
        exit 1
    fi

    if [ ! -x "$(command -v git)" ]; then
        printf "git is required for this action.\n"
        exit 1
    fi

    rm -f ${proj} ${proj}-${version}.tar.gz ${proj}-${version}.PKGBUILD *.o *zst*
    mkdir -p ${proj}-${version}
    cp -rf $(git ls-files | cut -d/ -f1 | uniq) "${proj}-${version}"
    tar -cf ${proj}-${version}.tar ${proj}-${version}
    gzip ${proj}-${version}.tar
    rm -rf ${proj}-${version}

    USER="$(whoami)"

    if [ "$1" = "release" ]; then
        printf "Is your GPG key '$(whoami)'?\n"
        select yn in "Yes" "No"; do
            case $yn in
                Yes) USER="$(whoami)"; break ;;
                No) printf "\n> "; read -r USER; break ;;
            esac
        done
    fi

    if [ -x "$(command -v gpg)" ] && [ "$1" = "release" ]; then
        gpg --detach-sign --yes --local-user "${USER}" ${proj}-${version}.tar.gz
    fi

    if [ -x "$(command -v md5sum)" ] && [ "$1" = "release" ]; then
        md5sum *.tar.gz | cut -d ' ' -f 1 > ${proj}-${version}.tar.gz.md5
    fi

    if [ -x "$(command -v sha256sum)" ] && [ "$1" = "release" ]; then
        sha256sum *.tar.gz | cut -d ' ' -f 1 > ${proj}-${version}.tar.gz.sha256
    fi
}

help() {
cat << EOF
$0 - Wrapper script for generating distro packages
End users should not run this script directly, this is for maintainers only.

$0 clean         Clean up the source tree
$0 dist          Create a distro package for ${proj}
$0 help          Print this help
EOF
}

main() {
    case "$1" in
        "clean") action="clean" ;;
        "dist") action="dist" ;;
        "help") action="help" ;;
        "") action="help" ;;
        *) [ -z "$action" ] && action="wrong" ;;
    esac

    check_correct_dir

    case "$action" in
        "wrong") printf "Invalid action: %s\n" "$1" && exit 1 ;;
        "clean") clean ;;
        "help") help ;;
        "dist") gen_pkg ;;
        "dist_release") gen_pkg "release";
    esac

    exit $?
}

main "$@"