A basic, but fast git prompt.

README.md

bash-basic-git-prompt

This is a considerably faster, but much more basic alternative to bash-git-prompt.

Thanks to @michaelneu for inspiration. I modified the script to make it even faster on windows, where subshells are too slow. I also inserted a new line into the prompt as personal preference.

bash-basic-git-prompt.sh

COLOR_GIT_CLEAN='\[\e[1;30m\]'
COLOR_GIT_MODIFIED='\[\e[1;31m\]'
COLOR_RESET='\[\e[0m\]'
COLOR_GREEN='\[\e[0;32m\]'
COLOR_YELLOW='\[\e[0;33m\]'

function append_git_prompt() {
  declare -A counts
  while read -a l ; do
    local tag="${l[0]}"
    [[ $tag = "fatal:" ]] && return
    [[ $tag = "??" ]] && tag="U"
    counts[$tag]=$((${counts[$tag]:-0} + 1))
  done < <(git status --porcelain 2>&1)

  local branch_name=$(git symbolic-ref -q HEAD)
  branch_name=${branch_name##refs/heads/}
  branch_name=${branch_name:-HEAD}
  PS1+="→ "
  if [[ "${#counts[@]}" = "0" ]] ; then
    PS1+="${COLOR_GIT_CLEAN}"
  else
    PS1+="${COLOR_GIT_MODIFIED}"
  fi
  PS1+="$branch_name${COLOR_RESET}"
  [[ ${counts[M]} -gt 0 ]] && PS1+=" *${counts[M]}"
  [[ ${counts[A]} -gt 0 ]] && PS1+=" +${counts[A]}"
  [[ ${counts[U]} -gt 0 ]] && PS1+=" ?${counts[U]}"
  PS1+=" "
}

function prompt() {
  PS1="${COLOR_GREEN}\u@\h${COLOR_RESET} [ ${COLOR_YELLOW}\w${COLOR_RESET} "
  append_git_prompt
  PS1+="]\n\$ "
}

PROMPT_COMMAND=prompt