PS1 setup with sad smiley for process failure and dangerous bend symbol for README files

ps1_notifications-2018-08.sh

#!/bin/bash

# Cleaned up version of ps1_notifications.sh made on 2018-08-05
# 
# See rybak/scriptps github repository for the full version
# link: https://github.com/rybak/scripts/blob/master/config/ps1_notifications.sh

# copy of lib/colors.sh instead of calling source "$HOME/scripts/lib/colors.sh"

BLACK_FG="$(tput setaf 0)"
RED_FG="$(tput setaf 1)"
GREEN_FG="$(tput setaf 2)"
YELLOW_FG="$(tput setaf 3)"
BLUE_FG="$(tput setaf 4)"
MAGENTA_FG="$(tput setaf 5)"
CYAN_FG="$(tput setaf 6)"
WHITE_FG="$(tput setaf 7)"

BLACK="$BLACK_FG"
RED="$RED_FG"
GREEN="$GREEN_FG"
YELLOW="$YELLOW_FG"
BLUE="$BLUE_FG"
MAGENTA="$MAGENTA_FG"
CYAN="$CYAN_FG"
WHITE="$WHITE_FG"

RESET_FONT="\e[0m"
BRIGHT_FG="\e[1m"
DIM_FG="\e[2m"
HIGHLIGHT_FONT="\e[4m"

PS_RESET_FONT='\[\e[0m\]'

function ps1_reset_font() {
    PS1="$PS1${PS_RESET_FONT}"
}

# /colors.sh

__TOP_BRACKET="\[\e[2m\]┌─"
__BOTTOM_BRACKET="\\[\\e[2m\\]└─"
# set up simple PS1
PS1=
ps1_reset_font
USERNAME_FONT='\033[0;33;93m'
HOSTNAME_FONT='\033[0;32m'
PS1="$__BRACKET_COLOR${__TOP_BRACKET}$PS1\[$USERNAME_FONT\]"'\u' # user
PS1="$PS1\[$WHITE\]"'@'  # @
PS1="$PS1\[$HOSTNAME_FONT\]"'\h' # host
ps1_reset_font

PS1="${PS1}\[\033[01;34m\]" # change to directory color
PS1="$PS1"'\w'                # current working directory
ps1_reset_font

__README_COLOR="$DIM_FG$MAGENTA_FG"

case "$TERM" in
xterm*|rxvt* )
	__SMILEY='☹ '
	__README_SYMBOL='☡'
    ;;
* )
	__SMILEY='('
	__README_SYMBOL='z'
    ;;
esac

function __custom_ps1() {
	local EXIT=$?

	local PREF="$1"
	local POST="$2"
	local SADNESS=
	local NOTIFY=
	local POST_RESET=
	if [[ "$EXIT" != '0' ]]
	then
		SADNESS="$__SMILEY"
	fi
	if [[ -n $(find -maxdepth 1 -iname '*README*' 2>/dev/null) ]]
	then
		NOTIFY='\['$__README_COLOR'\]'"$__README_SYMBOL$PS_RESET_FONT"
		POST_RESET="$PS_RESET_FONT"
	fi

	local GIT_POST="${NOTIFY}\n${SADNESS}${POST}${POST_RESET}"
	__git_ps1 "$PREF" "$GIT_POST"
}

PROMPT_COMMAND="__custom_ps1 '$PS1' '$__BOTTOM_BRACKET$PS_RESET_FONT\\\$ '"