#!/usr/bin/env bash

set -e

if git diff --quiet '*.nix'; then
  echo "No changes detected, exiting"
  exit 0
fi

alejandra . &>/dev/null ||
  (
    alejandra .
    echo "formatting failed!" && exit 1
  )

git diff -U0 '*.nix'

echo "NixOS rebuilding..."

sudo nixos-rebuild switch --impure --flake . &>nixos-switch.log || (cat nixos-switch.log | grep --color error && exit 1)

current=$(nixos-rebuild list-generations --json | jq '.[] | select (.current == true) | "\(.generation) \(.date) \(.nixosVersion) \(.kernelVersion)"')

git commit -am "$current"

echo "OK"