#!/bin/sh

set -eu

help () {
  cat <<EOF
Usage: $0 DIRECTORY
Remove the specified Git worktree and any submodules that are worktrees.

This program assumes that all the submodules are themselves worktrees and
not separate clones.
EOF
}

if [ $# -eq 0 ] || [ "$1" = "--help" ]; then
  help
  exit
fi
if [ $# -ne 1 ]; then
  help >&2
  exit 120
fi

cd "$1"
# List the names first then act on them, because 'git submodule foreach'
# gets confused if you remove the submodule while it's focusing on it.
git submodule --quiet foreach --recursive 'printf %s\\n "$sm_path"' |
  while IFS= read -r sm_path; do
    git -C "$sm_path" worktree remove .
    git submodule deinit "$sm_path"
  done
git worktree remove .