nixos-config/config/apps/bash/nxr.sh

# shellcheck disable=SC2148
function nxr() {
    set -u

    local pkg=""
    local bin=""

    local count=0
    for var in "$@"; do
        if [ "$var" == "--" ]; then
            count=$((count + 1))
            break
        fi

        if [ "$count" == "0" ]; then
            pkg="$var"
        fi

        if [ "$count" == "1" ]; then
            bin="$var"
        fi

        count=$((count + 1))
    done

    shift $count

    if [ -z "$pkg" ]; then
        echo "Error: no pkg name given"
        exit 1
    fi

    if [ -z "$bin" ]; then
        bin="$pkg"
    fi

    echo "Running nxr with:"
    printf "\tpkg=%s" "$pkg"
    printf "\tbin=%s" "$bin"
    printf "\topts=%s" "$@"
    printf "\n\n"

    nix-shell -p "$pkg" --run "$bin $*"
    set +u
}