function my_git_prompt() {
    tester=$(git rev-parse --git-dir 2> /dev/null) || return
    
    INDEX=$(git status --porcelain 2> /dev/null)
    STATUS=""
  
    # is branch ahead?
    if $(echo "$(git log origin/$(current_branch)..HEAD 2> /dev/null)" | grep '^commit' &> /dev/null); then
      STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_AHEAD"
    fi
  
    # is anything staged?
    if $(echo "$INDEX" | command grep -E -e '^(D[ M]|[MARC][ MD]) ' &> /dev/null); then
      STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_STAGED"
    fi
  
    # is anything unstaged?
    if $(echo "$INDEX" | command grep -E -e '^[ MARC][MD] ' &> /dev/null); then
      STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_UNSTAGED"
    fi
  
    # is anything untracked?
    if $(echo "$INDEX" | grep '^?? ' &> /dev/null); then
      STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_UNTRACKED"
    fi
  
    # is anything unmerged?
    if $(echo "$INDEX" | command grep -E -e '^(A[AU]|D[DU]|U[ADU]) ' &> /dev/null); then
      STATUS="$STATUS$ZSH_THEME_GIT_PROMPT_UNMERGED"
    fi
  
    if [[ -n $STATUS ]]; then
      STATUS=" $STATUS"
    fi
  
    echo "$ZSH_THEME_GIT_PROMPT_PREFIX$(my_current_branch)$STATUS$ZSH_THEME_GIT_PROMPT_SUFFIX"
  }
  
  function my_current_branch() {
    echo $(current_branch || echo "(no branch)")
  }
  
  function ssh_connection() {
    if [[ -n $SSH_CONNECTION ]]; then
      echo "%{$fg_bold[red]%}(ssh) "
    fi
  }
  
  local ret_status="%(?:%{$fg_bold[green]%}:%{$fg_bold[red]%})%?%{$reset_color%}"
  PROMPT=$'
  $(ssh_connection)%{$fg_bold[green]%}%n@%m%{$reset_color%}$(my_git_prompt) : %~
  [${ret_status}] %# '
  
  ZSH_THEME_PROMPT_RETURNCODE_PREFIX="%{$fg_bold[red]%}"
  ZSH_THEME_GIT_PROMPT_PREFIX=" $fg[white]‹ %{$fg_bold[yellow]%}"
  ZSH_THEME_GIT_PROMPT_AHEAD="%{$fg_bold[magenta]%}↑"
  ZSH_THEME_GIT_PROMPT_STAGED="%{$fg_bold[green]%}●"
  ZSH_THEME_GIT_PROMPT_UNSTAGED="%{$fg_bold[red]%}●"
  ZSH_THEME_GIT_PROMPT_UNTRACKED="%{$fg_bold[white]%}●"
  ZSH_THEME_GIT_PROMPT_UNMERGED="%{$fg_bold[red]%}✕"
  ZSH_THEME_GIT_PROMPT_SUFFIX=" $fg_bold[white]›%{$reset_color%}"