#!/usr/bin/env bash 
set -euo pipefail

# Stolen from https://stackoverflow.com/a/29436423 
function yes_or_no {
    while true; do
        read -p "$* [y/n]: " yn
        case $yn in
            [Yy]*) return 0  ;;  
            [Nn]*) echo "Aborted" ; return  1 ;;
        esac
    done
}

function apply() {
  git push --force-with-lease
  rev=$(git rev-parse HEAD)
  sudo nixos-rebuild switch \
    --flake "git+https://git.atauno.com/atau/nixos-config.git?ref=main&rev=$rev"
}

function commit_and_apply() {
  read -p "Enter a commit message: " msg
  git add .
  git commit -m "$(hostname): $msg"
  apply
}

if [ -z "$(git status --porcelain)" ]
then
  apply
else
  yes_or_no "Git working directory is unclean, would you like to commit changes?" && commit_and_apply
fi