.bash_prompt

#!/usr/local/bin/bash
#
# .bash_prompt
#
# @author Rodney Smith
#
export BASH_CONF=".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 Monaco 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=" [${s}]";
		echo -e "${1}${branchName}${2}${s}";
	else
		return;
	fi
}

## Solarized colors, taken from http://git.io/solarized-colors.
#SOLARIZED HEX     16/8 TERMCOL  XTERM/HEX   L*A*B      RGB         HSB
#--------- ------- ---- -------  ----------- ---------- ----------- -----------
#base03    #002b36  8/4 brblack  234 #1c1c1c 15 -12 -12   0  43  54 193 100  21
#base02    #073642  0/4 black    235 #262626 20 -12 -12   7  54  66 192  90  26
#base01    #586e75 10/7 brgreen  240 #585858 45 -07 -07  88 110 117 194  25  46
#base00    #657b83 11/7 bryellow 241 #626262 50 -07 -07 101 123 131 195  23  51
#base0     #839496 12/6 brblue   244 #808080 60 -06 -03 131 148 150 186  13  59
#base1     #93a1a1 14/4 brcyan   245 #8a8a8a 65 -05 -02 147 161 161 180   9  63
#base2     #eee8d5  7/7 white    254 #e4e4e4 92 -00  10 238 232 213  44  11  93
#base3     #fdf6e3 15/7 brwhite  230 #ffffd7 97  00  10 253 246 227  44  10  99
#yellow    #b58900  3/3 yellow   136 #af8700 60  10  65 181 137   0  45 100  71
#orange    #cb4b16  9/3 brred    166 #d75f00 50  50  55 203  75  22  18  89  80
#red       #d30102  1/1 red      124 #af0000 45  70  60 211   1   2   0  99  83
#magenta   #d33682  5/5 magenta  125 #af005f 50  65 -05 211  54 130 331  74  83
#violet    #6c71c4 13/5 brmagenta 61 #5f5faf 50  15 -45 108 113 196 237  45  77
#blue      #268bd2  4/4 blue      33 #0087ff 55 -10 -45  38 139 210 205  82  82
#cyan      #2aa198  6/6 cyan      37 #00afaf 60 -35 -05  42 161 152 175  74  63
#green     #859900  2/2 green     64 #5f8700 60 -20  65 133 153   0  68 100  60

# Colors
#Black       0;30     Bold Black    1;30
#Red         0;31     Bold Red      1;31
#Green       0;32     Bold Green    1;32
#Yellow      0;33     Bold Yellow   1;33
#Blue        0;34     Bold Blue     1;34
#Purple      0;35     Bold Purple   1;35
#Cyan        0;36     Bold Cyan     1;36
#White       0;37     Bold White    1;37

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 153);
	green=$(tput setaf 71);
	orange=$(tput setaf 166);
	red=$(tput setaf 167);
	white=$(tput setaf 15);
	yellow=$(tput setaf 228);
else
	bold='';
	reset="\e[0m";
	black="\e[0;30m";
	blue="\e[0;34m";
	green="\e[0;32m";
	orange="\e[0;33m";
	red="\e[0;31m";
        cyan="\e[0;36m";
	white="\e[1;37m";
	yellow="\e[1;33m";
        ltblue="\e[1;34m";
        ltgreen="\e[1;32m";
        ltcyan="\e[1;36m";
        ltred="\e[1;31m";
        purple="\e[0;35m";
        ltpurple="\e[1;35m";
fi

# Highlight the user name when logged in as root.
if [[ "${USER}" == "root" ]]; then
	userStyle="${red}";
else
	userStyle="${cyan}";
fi

# Highlight the hostname when connected via SSH.
if [[ "${SSH_TTY}" ]]; then
	hostStyle="${bold}${red}";
else
	hostStyle="${orange}";
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+="\[${yellow}\]\W"; # working directory
PS1+="\$(prompt_git \"\[${white}\] on \[${blue}\]\" \"\[${blue}\]\")"; # Git repository details
PS1+="\n";
PS1+="\[${white}\]\$ \[${reset}\]"; # `$` (and reset color)
export PS1

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