#!/usr/bin/env bash
# reset environment variables that could interfere with normal usage
unset -v GREP_OPTIONS
# put all utility functions here

# make a temporary file
git_extra_mktemp() {
    mktemp -t "$(basename "$0")".XXXXXXX
}

git_extra_default_branch() {
    local extras_default_branch init_default_branch
    extras_default_branch=$(git config --get git-extras.default-branch)
    init_default_branch=$(git config --get init.defaultBranch)
    if [ -n "$extras_default_branch" ]; then
        echo "$extras_default_branch"
    elif [ -n "$init_default_branch" ]; then
        echo "$init_default_branch"
    else
        echo "main"
    fi
}
#
# check whether current directory is inside a git repository
#

is_git_repo() {
  git rev-parse --show-toplevel > /dev/null 2>&1
  result=$?
  if test $result != 0; then
    >&2 echo 'Not a git repo!'
    exit $result
  fi
}

is_git_repo

git version
echo "git-extras version ""$(git-extras -v)"
echo "type 'ls' to ls files below current directory, '!command' to execute any command or just 'subcommand' to execute any git subcommand"

while true; do
  # Current branch
  cur=$(git symbolic-ref HEAD 2> /dev/null | cut -d/ -f3-)

  # Prompt
  if test -n "$cur"; then
    prompt="git ($cur)> "
  else
    prompt="git> "
  fi

  # Readline
  read -e -r -p "$prompt" cmd

  # EOF
  test $? -ne 0 && break

  # History
  history -s "$cmd"

  # Built-in commands
  case $cmd in
    ls) cmd=ls-files;;
    "") continue;;
    quit|exit) break;;
  esac

  if [[ $cmd == !*  ]]; then
    eval ${cmd:1} 
  elif [[ $cmd == git* ]]; then
    eval $cmd
  else
    eval git "$cmd"
  fi
done

echo
