Bash prompt

.bash_prompt

# Shell prompt based on the Solarized Dark theme.
# Screenshot: http://i.imgur.com/EkEtphC.png
# Heavily inspired by @necolas’s prompt: https://github.com/necolas/dotfiles
# iTerm → Profiles → Text → use 13pt Fira Code with 1.1 vertical spacing.

if [[ $COLORTERM = gnome-* && $TERM = xterm ]] && infocmp gnome-256color >/dev/null 2>&1; then
  export TERM='gnome-256color';
elif infocmp xterm-256color >/dev/null 2>&1; then
  export TERM='xterm-256color';
fi;

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 "${1}${branchName}${blue}${s}";
    echo "${1}${branchName}${s}";
  else
    return;
  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";
  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";
# 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;

# Set the terminal title to the current working directory.
PS1="\[\033]0;\w\007\]";
PS1+="\n\[${black}\][\D{%H:%M}] "
PS1+="\[${bold}\]";
# PS1+="\[${userStyle}\]\u"; # username
# PS1+="\[${white}\] at ";
# PS1+="\[${hostStyle}\]\h"; # host
# PS1+="\[${white}\] in ";
PS1+="${userStyle}\w"; # working directory
PS1+="\$(prompt_git \"\[${white}\] on \[${violet}\]\")";
PS1+=" ";
PS1+="\[${white}\]→ \[${reset}\]"; # `$` (and reset color)
export PS1;

PS2="\[${yellow}\]→ \[${reset}\]";
export PS2;