#!/usr/bin/env bash

set -euo pipefail

msg() {
  echo >&2 -e "${1-}"
}

die() {
  local msg=$1
  local code=${2-1} # default exit status 1
  msg "$msg"
  simpledelay.sh 2 # short delay to aid reading last message in case terminal closes on exit
  exit "$code"
}

parse_params() {
   while :; do
      case "${1-}" in
      -?*) die "Unknown option: $1" ;;
      *) break ;;
      esac
      shift
   done

   args=("$@")
   return 0
}

parse_params "$@"


this_submod=${args[0]}
this_subtmp="${args[0]}_tmp"
# https://stackoverflow.com/a/16162228

msg "moving $this_submod to $this_subtmp"
mv $this_submod $this_subtmp

msg "git submodule deinit"
git submodule deinit $this_submod

msg "git rm $this_submod"
git rm $this_submod

msg "moving back $this_submod"
mv $this_subtmp $this_submod

msg "remove the existing .git file"
rm $this_submod/.git

msg "move the .git folder from modules into $this_submod"
mv .git/modules/$this_submod $this_submod/.git

msg "remove the worktree line from .git/config"
sed -i '/worktree/d' $this_submod/.git/config

msg "add $this_submod to .gitignore"
echo "$this_submod" >> .gitignore