#!/usr/bin/env bash

set -eu

# delete any temporary or generated files.
function clean {
  rm -rf ./result
}

# Display a list of all available commands.
function help {
  printf "%s <task> [args]\n\nTasks:\n" "${0}"

  compgen -A function | grep -v "^_" | cat -n

  printf "\nExtended help:\n  Each task has comments for general usage\n"
}

# Perform nixos-rebuild commands for a specified flake on NixOS.
function nixos {
  clean

  local profile="${1}"
  local command="${2}"
  shift 2

  sudo nixos-rebuild "${command}" \
    --flake ".#${profile}" "${@}"
}

# Update the Nix Flake.
function update {
  nix flake update
}

# Perform home-manager commands on WSL2.
function wsl2 {
  clean

  local command="${1}"

  NIXPKGS_ALLOW_UNFREE=1 home-manager "${command}" \
    --extra-experimental-features flakes \
    --extra-experimental-features nix-command \
    --flake ".#wsl2" \
    --impure
}

TIMEFORMAT=$'\nTask completed in %3lR'
time "${@:-help}"