Nice bash prompt for git

When checking out jfrazelle's Dockerfiles which are super fun I went down the rabbit hole with her dotfiles

I stole, and liked the setup for her bash prompt when working with GIT.

Chuck the following in your .bash_profile or fork a dotfiles repo.

prompt_git() {
 local s='';
 local branchName='';

 # Check if the current directory is in a Git repository.
 if [ $(git rev-parse --is-inside-work-tree &>/dev/null; echo "${?}") == '0' ]; then

  # check if the current directory is in .git before running git checks
  if [ "$(git rev-parse --is-inside-git-dir 2> /dev/null)" == 'false' ]; then

   # Ensure the index is up to date.
   git update-index --really-refresh -q &>/dev/null;

   # Check for uncommitted changes in the index.
   if ! $(git diff --quiet --ignore-submodules --cached); then
    s+='+';
   fi;

   # Check for unstaged changes.
   if ! $(git diff-files --quiet --ignore-submodules --); then
    s+='!';
   fi;

   # Check for untracked files.
   if [ -n "$(git ls-files --others --exclude-standard)" ]; then
    s+='?';
   fi;

   # Check for stashed files.
   if $(git rev-parse --verify refs/stash &>/dev/null); then
    s+='$';
   fi;

  fi;

  # Get the short symbolic ref.
  # If HEAD isn’t a symbolic ref, get the short SHA for the latest commit
  # Otherwise, just give up.
  branchName="$(git symbolic-ref --quiet --short HEAD 2> /dev/null || \
   git rev-parse --short HEAD 2> /dev/null || \
   echo '(unknown)')";

  [ -n "${s}" ] && s=" [${s}]";

  echo -e "${1}${branchName}${blue}${s}";
 else
  return;
 fi;
# Highlight the user name when logged in as root.
if [[ "${USER}" == "root" ]]; then
 userStyle="${red}";
else
 userStyle="${orange}";
fi;

# Highlight the hostname when connected via SSH.
if [[ "${SSH_TTY}" ]]; then
 hostStyle="${bold}${red}";
else
 hostStyle="${yellow}";
fi;

if tput setaf 1 &> /dev/null; then
 tput sgr0; # reset colors
 bold=$(tput bold);
 reset=$(tput sgr0);
 # Solarized colors, taken from http://git.io/solarized-colors.
 black=$(tput setaf 0);
 blue=$(tput setaf 33);
 cyan=$(tput setaf 37);
 green=$(tput setaf 64);
 orange=$(tput setaf 166);
 purple=$(tput setaf 125);
 red=$(tput setaf 124);
 violet=$(tput setaf 61);
 white=$(tput setaf 15);
 yellow=$(tput setaf 136);
else
 bold='';
 reset="\e[0m";
 black="\e[1;30m";
 lightblue="\e[94m";
 blue="\e[1;34m";
 cyan="\e[1;36m";
 green="\e[1;32m";
 orange="\e[1;33m";
 purple="\e[1;35m";
 red="\e[1;31m";
 violet="\e[1;35m";
 white="\e[1;37m";
 yellow="\e[1;33m";
 notdim="\e[22m"
 dim="\e[2m"
fi;


# Set the terminal title to the current working directory.
PS1="\[\033]0;\w\007\]";
PS1+="\[${bold}\]\n"; # newline
PS1+="\[${userStyle}\]\u"; # username
PS1+="\[${white}\] at ";
PS1+="\[${hostStyle}\]\h"; # host
PS1+="\[${white}\] in ";
PS1+="\[${green}\]\w"; # working directory
PS1+="\$(prompt_git \"${white} on ${violet}\")"; # Git repository details
PS1+="\n";
PS1+="\[${blue}\]\$ \[${reset}\]"; # `$` (and reset color)
export PS1;
}

Pretty useful.