#!/bin/sh

SUDO=doas
_fossil_co=$(fossil all ls -c | grep fossil) # fossil checkout location
_ask_upgrade=1
_ask_all=1
_clean_build=0
_make_jobs=8

usage() {
    echo "usage: fossil-update [OPTIONS]"
    echo "options:"
    echo "  -y  upgrade without asking"
    echo "  -a  upgrade and turn off the fossil service(if it's running) without asking"
    echo "  -c  clean build, run 'make distclean' before building"
    echo "  -h  print this help message"
}

check_service() {
    _fsl_pid=$(pgrep -u root -f "$(which fossil)") && export _fsl_pid
    [ -n "$_fsl_pid" ] && {
        [ "$_ask_all" -ne 0 ] && {
            echo "fossil service is active. stop it? (Y/y)"
            read -r _stop_fsl
            case $_stop_fsl in
                [Yy] ) stop_service && return 0
                    ;;
                * ) echo "upgrade is not possible" && exit 2
                    ;;
            esac
        }
    stop_service
    }
}

stop_service() {
    # i am using systemd service to run fossil server
    $SUDO systemctl stop fossil
}

compile() {
    echo "configuring..." && \
        ./configure >/dev/null && \
        echo "building..." && make -j "$_make_jobs" >/dev/null \
        && echo "build done"
}

install() {
    check_service
    $SUDO make install >/dev/null && echo "upgrade done"
    [ -n "$_fsl_pid" ] && echo "don't forget to enable fossil service back" \
        || return 0
}

main() {
    cd "$_fossil_co" || return
    [ $_clean_build -gt 0 ] && {
        echo "cleaning previous build"
        [ -f Makefile ] && make distclean >/dev/null
    }
    fossil up trunk
    [ $_ask_all -eq 0 ] || [ $_ask_upgrade -eq 0 ] && {
        compile && install
        exit
    }
    echo "upgrade? (Y/y)" && \
        read -r _upgrade && \
        case $_upgrade in
            [Yy] ) compile && install
                ;;
            * ) exit 1
                ;;
        esac
}

while getopts yach opts
do
    case "$opts" in
        y)
            _ask_upgrade=0
            ;;
        a)
            _ask_all=0
            ;;
        c)
            _clean_build=1
            ;;
        h|*)
            usage && exit 1
            ;;
    esac
done

main