#!/bin/bash
set -e

backup_dir=$(mktemp -d)
trap 'rm -rf "$backup_dir"' EXIT

revert() {
  cp "$backup_dir/go.mod" "go.mod"
  cp "$backup_dir/go.sum" "go.sum"
}

cp go.mod go.sum "$backup_dir"
if [[ $(go mod tidy 2>&1) ]]; then
  printf "FAIL: error in go.mod. Please run 'go mod tidy' and fix any issues\n"
  revert
  exit 1
fi

if [[ $(diff "go.mod" "$backup_dir/go.mod") ]] || [[ $(diff "go.sum" "$backup_dir/go.sum") ]]; then
  printf "FAIL: go.mod/go.sum are not up to date. Please run 'go mod tidy'\n"
  revert
  exit 1
fi