# jack@host [~/dotfiles] master [+!?$]

# ⑆

# TODO: Add screenshot of prompt

# Terminal prefs: import Solarized theme and disable bright colors for bold text

# References:

# terminal color: http://vim.wikia.com/wiki/Xterm256_color_names_for_console_Vim

# color output: http://tldp.org/LDP/abs/html/colorizing.html

# bash prompt escape sequences:

# https://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/bash-prompt-escape-sequences.html

# http://www.cyberciti.biz/tips/howto-linux-unix-bash-shell-setup-prompt.html

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;

if [ -n "$ZSH_VERSION" ]; then

setopt PROMPT_SUBST

export RPROMPT=

fi;

is_in_git_repository() {

[ $(git rev-parse --is-inside-work-tree &>/dev/null; printf "%s" $?) = 0 ]

}

prompt_git_branch() {

local branchName=""

if is_in_git_repository ; then

# get the short symbolic ref

# if HEAD isn't a symbolic ref, get the short SHA

# otherwise, just give up

branchName="$(git symbolic-ref --quiet --short HEAD 2> /dev/null || \

git rev-parse --short HEAD 2> /dev/null || \

printf "(unknown)")"

echo $branchName

fi

}

prompt_git_status() {

local s=""

local root=""

if is_in_git_repository ; 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 index is up to date

git update-index --really-refresh -q &>/dev/null

# get root of repository

root=$(git rev-parse --show-toplevel)

# check for uncommitted changes in the index

if ! $(git diff --quiet --ignore-submodules --cached); then

s="$s+";

fi

# check for unstaged changes

if ! $(git diff-files --quiet --ignore-submodules --); then

s="$s!";

fi

# check for untracked files

if [ -n "$(git ls-files --others --exclude-standard $root)" ]; then

s="$s?";

fi

# check for stashed files

if $(git rev-parse --verify refs/stash &>/dev/null); then

s="$s$";

fi

fi

[ -n "$s" ] && s="[$s]"

echo $s

fi

}

# Define colors used in prompt

# TODO: replace associative array to be compatible with Bash versions < 4.0

declare -A colors

declare -A colors_escaped

# The following colors assume use of a terminal with a solarized color palette

# like gnome-terminal. If not using a solarized terminal palette, use the colors

# from http://git.io/solarized-colors.

if tput setaf 1 &> /dev/null; then

tput sgr0; # reset colors

colors[bold]=$(tput bold);

colors[reset]=$(tput sgr0);

colors[black]=$(tput setaf 0);

colors[gray]=$(tput setaf 12);

colors[white]=$(tput setaf 7);

colors[red]=$(tput setaf 1);

colors[orange]=$(tput setaf 9);

colors[yellow]=$(tput setaf 3);

colors[green]=$(tput setaf 2);

colors[cyan]=$(tput setaf 6);

colors[blue]=$(tput setaf 4);

colors[purple]=$(tput setaf 13);

else

colors[bold]='';

colors[reset]="\e[0m";

colors[black]="\e[30m";

colors[gray]="\e[37m";

colors[white]="\e[37m";

colors[red]="\e[31m";

colors[orange]="\e[91m";

colors[yellow]="\e[33m";

colors[green]="\e[32m";

colors[cyan]="\e[36m";

colors[blue]="\e[34m";

colors[purple]="\e[95m";

fi;

# Set variables for special prompt characters.

if [ -n "$BASH_VERSION" ]; then

echo $username;

username="\u";

hostname="\h";

workdir="\w";

escapeLeft="\[";

escapeRight="\]";

elif [ -n "$ZSH_VERSION" ]; then

echo $username;

username="%n";

hostname="%m";

workdir="%~";

escapeLeft="%{";

escapeRight="%}";

fi;

# Wrap color sequences in escaped brackets so shell doesn't count them towards

# the character length of the prompt. See a detailed explanation here:

# https://unix.stackexchange.com/a/124409.

generate_escaped_colors() {

if [ -n "$ZSH_VERSION" ]; then emulate -L ksh; fi

for i in "${!colors[@]}"; do

colors_escaped[$i]="$escapeLeft${colors[$i]}$escapeRight"

done

}

generate_escaped_colors

# Highlight the username when logged in as root.

if [[ "${USER}" == "root" ]]; then

userStyle="${colors_escaped[red]}";

else

userStyle="${colors_escaped[orange]}";

fi;

# Highlight the hostname when connected via SSH.

if [[ "${SSH_TTY}" ]]; then

hostStyle="${colors_escaped[bold]}${colors_escaped[red]}";

else

hostStyle="${colors_escaped[yellow]}";

fi;

if [ -n "$ZSH_VERSION" ]; then

setopt PROMPT_SUBST;

fi;

# Set the terminal title and prompt.

PS1="${colors_escaped[reset]}"

# PS1+="\[\e]0;\w\007\]"; # terminal title (set to working directory full path)

PS1+="${userStyle}$username${colors_escaped[reset]}"; # username

PS1+="@";

PS1+="${hostStyle}$hostname${colors_escaped[reset]}"; # host

PS1+=" ";

PS1+="${colors_escaped[green]}[$workdir]"; # working directory full path

PS1+=" ";

PS1+="${colors_escaped[cyan]}"

PS1+='$(prompt_git_branch)'; # git branch

PS1+="${colors_escaped[blue]} "

PS1+='$(prompt_git_status)'; # git status

PS1+=$'\n';

PS1+="${colors_escaped[white]}"

PS1+=$'\u2446' # prompt icon (⑆)

PS1+=" ";

PS1+="${colors_escaped[reset]}";

export PS1;

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

export PS2;

unset colors_escaped;

unset userStyle;

unset hostStyle;

unset username;

unset hostname;

unset workdir;

unset escapeRight;

unset escapeLeft;