open-worktree

#! /bin/bash

set -e

if [ "${#}" != "2" ]; then
  echo "usage: $(basename "${0}") <GIT_PARENT_DIRECTORY> <WORKTREE_PARENT_DIRECTORY>"
  echo
  echo "Prints the selected worktree directory"
  exit 1
fi

git_parent_directory="${1}"
worktree_parent_directory="${2}"

git_directory="$(find "${git_parent_directory}" -type d -execdir sh -c 'git -C {} rev-parse --is-inside-work-tree >/dev/null 2>/dev/null' ';' -print -prune | fzf)"

shortref="$(git -C "${git_directory}" for-each-ref --format="%(refname:short)" | fzf --bind=enter:accept-or-print-query)"

if git -C "${git_directory}" rev-parse --verify --quiet "${shortref}" >/dev/null; then
  fullref="$(git -C "${git_directory}" rev-parse --symbolic-full-name "${shortref}")"
  worktree="$(git -C "${git_directory}" for-each-ref --omit-empty --format='%(worktreepath)' "${fullref}")"
  if [ -z "${worktree}" ]; then
    # TODO: Find and open detached worktrees
    worktree="$(mktemp -d -p "${worktree_parent_directory}" -t worktree)"
    git -C "${git_directory}" worktree add "${worktree}" "${shortref}" >/dev/tty
  fi
else
  # create a branch in a worktree
  starting_point="$(git -C "${git_directory}" for-each-ref --format="%(refname:short)" | fzf)"
  worktree="$(mktemp -d -p "${worktree_parent_directory}" -t worktree)"
  git -C "${git_directory}" worktree add --quiet -b "${shortref}" "${worktree}" "${starting_point}" --no-track >/dev/tty
fi

echo ${worktree}