#!/bin/sh

set -eo pipefail

DIR=$(realpath $(dirname $0))
D=$(mktemp -du)
ROOT="$DIR/roots/uwu.nix"

echo Active tree: $DIR

## Build the libkookie tree
function build {  
    NIXPKGS_ALLOW_UNFREE=1 \
            nix build -f '<nixpkgs/nixos>' config.system.build \
            -I nixos-config="$ROOT" \
            -I "nixpkgs=$DIR/nixpkgs" \
            -I "nixpkgs-overlays=$DIR/overlays" \
            -I "home-manager=$DIR/home-manager" \
            --out-link "$D" $ARGV
}

## Build and output build path for debugging
function debug {
    build $ROOT
    echo "Build path: $D-18"
    exit 0
}

## Build and switch to the new configuration (requires root)
function switch {
    build $ROOT
    $D-18/bin/switch-to-configuration switch
}

case "$1" in
    -s* | --switch*) shift; switch ;;
    -d* | --debug*)  shift; debug ;;
    *)               shift; build ;;
esac

rm -rf $D*