#!/bin/bash

# check that the dotfiles repository is up-to-date and clean
# otherwise create the dirty stamp file

script_path=$(realpath "$0")
script_dir=$(dirname "${script_path}")
dotfiles_dir=$(realpath "${script_dir}/..")

dirty_stamp=~/.local/var/dotfiles/dirty

if [ ! -d "${dotfiles_dir}" ]; then
    echo "no dotfiles dir"
    exit 1
fi

git -C "${dotfiles_dir}" fetch -q --all || (echo "error updating remote" && exit 1)
count=$(git -C "${dotfiles_dir}" rev-list --left-right --count '@{upstream}'...HEAD 2>/dev/null | grep -v '^0\s0$')

git -C "${dotfiles_dir}" diff --exit-code >/dev/null
repo_dirty=$?

if [[ -n "${count}" || $repo_dirty -ne 0 ]]; then
    touch "${dirty_stamp}"
else
    rm -f "${dirty_stamp}"
fi