.bash_prompt

#!/bin/bash

# Check that terminfo exists before changing TERM var to xterm-256color
# Prevents prompt flashing in Mac OS X 10.6 Terminal.app
if [ -e /usr/share/terminfo/x/xterm-256color ]; then
    export TERM='xterm-256color'
fi

tput sgr 0 0

# Base styles and color palette
# Solarized colors
# https://github.com/altercation/solarized/tree/master/iterm2-colors-solarized
BOLD=$(tput bold)
RESET=$(tput sgr0)
SOLAR_BLACK=$(tput setaf 0)
SOLAR_YELLOW=$(tput setaf 136)
SOLAR_ORANGE=$(tput setaf 166)
SOLAR_RED=$(tput setaf 124)
SOLAR_MAGENTA=$(tput setaf 125)
SOLAR_VIOLET=$(tput setaf 61)
SOLAR_BLUE=$(tput setaf 33)
SOLAR_CYAN=$(tput setaf 37)
SOLAR_GREEN=$(tput setaf 64)
SOLAR_WHITE=$(tput setaf 15)

# Styles
style_at="\[${RESET}${SOLAR_VIOLET}\]"
style_path="\[${RESET}${SOLAR_GREEN}\]"
style_chars="\[${RESET}${SOLAR_WHITE}\]"
style_branch="${RESET}${SOLAR_CYAN}"
style_state="${RESET}${SOLAR_BLUE}"

# Highlight the user name when logged in as root
if [[ "$USER" == "root" ]]; then
    style_user="\[${BOLD}${SOLAR_RED}\]"
else
    style_user="\[${RESET}${SOLAR_ORANGE}\]"
fi;

# Highlight the hostname when connected via SSH
if [[ "$SSH_TTY" ]]; then
    style_host="\[${BOLD}${SOLAR_RED}\]"
else
    style_host="\[${RESET}${SOLAR_YELLOW}\]"
fi;

# Git status information
prompt_git() {
    local git_branch='';
    local git_state='';

    if [ $(git rev-parse --is-inside-work-tree &>/dev/null; echo "${?}") == '0' ]; then
        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
                git_state+='+';
            fi;

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

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

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

        git_branch="$(git symbolic-ref --quiet --short HEAD 2> /dev/null || \
                    git rev-parse --short HEAD 2> /dev/null || \
                    echo '(unknown)')";

        [ -n "${git_state}" ] && git_state="[${git_state}]"

        echo -e "${SOLAR_WHITE} on ${style_branch}${git_branch} ${style_state}${git_state}"
    else
        return;
    fi;
}


# Set the terminal title to the current working directory
PS1="\[\033]0;\w\007\]"
# Build the prompt
#PS1+="\n" # Newline

PS1+="${style_user}\u" # Username
PS1+="${style_at}@" # @
PS1+="${style_host}\h" # Host
PS1+="${style_chars}:" # :
PS1+="${style_path} \w" # Working directory
PS1+="\$(prompt_git)" # Git details
PS1+="\n" # Newline
PS1+="${style_chars}\$ \[${RESET}\]" # $ (and reset color)