.bash_prompt

#!/usr/bin/env bash
# Modified from https://github.com/twolfson/sexy-bash-prompt/blob/master/.bash_prompt
ESC='\033'
BEL=$(tput bel)

# If we are on a coloured terminal
if tput setaf 1 &> /dev/null; then
    # Reset the shell from the above `if` check
    tput sgr0 &> /dev/null

    prompt_bold="$(tput bold)"
    prompt_reset="$(tput sgr0)"
    peompr_underline="$(tput sgr 0 1)"

    # If the terminal supports at least 256 colors
    if [[ "$(tput colors)" -ge 256 ]] &> /dev/null; then
        prompt_white="$prompt_bold$(tput setaf 7)"
        prompt_red="$prompt_bold$(tput setaf 9)"
        prompt_green="$prompt_bold$(tput setaf 76)"
        prompt_blue="$prompt_bold$(tput setaf 27)"
    # otherwise use 8 bit colours
    else
        prompt_white="$prompt_bold$(tput setaf 7)"
        prompt_red="$prompt_bold$(tput setaf 1)"
        prompt_green="$prompt_bold$(tput setaf 2)"
        prompt_blue="$prompt_bold$(tput setaf 4)"
    fi
# otherwise use ANSI escape sequences
else
    prompt_reset="${ESC}[m"
    prompt_white="${ESC}[1;37m"
    prompt_red="${ESC}[1;31m"
    prompt_green="${ESC}[1;32m"
    prompt_blue="${ESC}[1;34m"
fi

function prompt_get_git_branch() {
    # On branches, this returns the branch name
    ref="$(git symbolic-ref HEAD 2> /dev/null | sed -e 's/refs\/heads\///')"
    if [[ "$ref" != "" ]]; then
        echo "$ref"
    else
        echo "(no branch)"
    fi
}

# Window title of X terminals
function prompt_window_title() {
    echo "${ESC}]0;\u@\h:\w${BEL}"
}

function prompt_headline() {
    if [[ ${EUID} -eq 0 ]]; then
        echo "$prompt_red\u@\h$prompt_reset $prompt_blue\w$prompt_reset"
    else
        echo "$prompt_green\u@\h$prompt_reset $prompt_blue\w$prompt_reset"
    fi
}

function prompt_exit_status() {
    token='\$'
    #token="→"
    if [[ "$return_value" -eq 0 ]]; then
        output="$prompt_white$token$prompt_reset"
    else
        output="$prompt_red($return_value) $token$prompt_reset"
    fi
    echo "$output"
}

function prompt_command() {
    export return_value=$?
    export PS1="\
$(prompt_window_title)\
$(prompt_headline)\
\n\
$(prompt_exit_status) \
$prompt_reset"
}

export PROMPT_COMMAND=prompt_command