#!/usr/bin/env bash

set -euo pipefail

function ls-source-files {
  git ls-files "app/*.hs" "src/*.hs" "test/*.hs"
}

function check-git-status {
  [ "$(git status -s '*.hs' | wc -l)" == "0" ]
}

function stylish {
  stylish-haskell -i $(ls-source-files)
}

if check-git-status
then
  echo "Running stylish-haskell..."
  stylish
  echo "Done."
  if check-git-status
  then
    echo "OK, impeccable style."
  else
    echo "KO! Lack of style on those files:"
    git status -sb
    exit 1
  fi
else
  echo "git status not clean, aborting"
fi