autoload -U colors && colors

function set_prompt() {
  PS1="[%{$fg[yellow]%}%D{%H:%M:%S}%{$reset_color%}] %{$fg[green]%}%n%{$fg[cyan]%}@%m %{$fg[magenta]%}%~%{$reset_color%} $(git_prompt_info)%(?..%{$fg[red]%})$ %{$reset_color%}"
}

function __git_prompt_git() {
  GIT_OPTIONAL_LOCKS=0 command git "$@"
}

function git_prompt_info() {
  if ! __git_prompt_git rev-parse --git-dir &> /dev/null ; then
    return 0
  fi
  echo "%{$reset_color%}\ue725 on %{$fg[green]%}$(git_current_branch)$(parse_git_dirty)%{$reset_color%} "
}

function git_current_branch() {
  local ref
  ref=$(__git_prompt_git symbolic-ref --quiet HEAD 2> /dev/null)
  local ret=$?
  if [[ $ret != 0 ]]; then
    [[ $ret == 128 ]] && return  # no git repo.
    ref=$(__git_prompt_git rev-parse --short HEAD 2> /dev/null) || return
  fi
  echo ${ref#refs/heads/}
}

function parse_git_dirty() {
  local STATUS
  local -a FLAGS
  FLAGS=('--porcelain')
  if [[ "$(__git_prompt_git config --get oh-my-zsh.hide-dirty)" != "1" ]]; then
    if [[ "${DISABLE_UNTRACKED_FILES_DIRTY:-}" == "true" ]]; then
      FLAGS+='--untracked-files=no'
    fi
    case "${GIT_STATUS_IGNORE_SUBMODULES:-}" in
      git)
        # let git decide (this respects per-repo config in .gitmodules)
        ;;
      *)
        # if unset: ignore dirty submodules
        # other values are passed to --ignore-submodules
        FLAGS+="--ignore-submodules=${GIT_STATUS_IGNORE_SUBMODULES:-dirty}"
        ;;
    esac
    STATUS=$(__git_prompt_git status ${FLAGS} 2> /dev/null | tail -n 1)
  fi
  if [[ -n $STATUS ]]; then
    echo "%{$fg[yellow]%}%1{±%}"
  fi
}

set_prompt
chpwd_functions+=(set_prompt)