#!/bin/env fish
function evalFlake --argument-names config property
    set -l argv $argv[3..]
    argparse --ignore-unknown "apply=" "json" -- $argv

    if [ -z "$_flag_json" ]
        set -a argv --raw
    else
        set -a argv --json
    end

    if [ -z "$_flag_apply" ]
        set _flag_apply "_: _"
    end

    if [ -n "$config" ]
        set config ".$config"
        set _flag_apply "_: ($_flag_apply) ((import $(status dirname)/../../../lib/eval-attribute.nix) _)"
    end

    PROPERTY="$property" \
    nix eval --impure --extra-experimental-features "nix-command flakes" \
        --apply "$_flag_apply" \
        "$(realpath (status dirname))/../../..#valhalla$config" \
        $argv
end