path_exists

#!/bin/bash

set -e

# Required a single argument
if [ $# -ne 1 ]
then
	cat <<EOF
Usage: ${0##*/} TITLE

For a more thorough description, please refers to i3-status man page.

EOF
	exit 1
fi >&2

# Setup default values
# path is not set and must be set
format="${format-%title: %status}"
format_down="${format_down-$format}"

# Set full text format string
fulltext_format="$format"

# Compute all placeholders values
_title="$1"
if ! test -e "$path"
then
	_status="no"
	color="#ff0000"
	fulltext_format="$format_down"
else
	_status="yes"
	color="#00ff00"
fi

# Update full text (first line)
eval "$(echo "echo \"${fulltext_format//%/\$_}\"")"

# Update text color
echo          # empty short text (second line)
echo "$color" # text color (third line)
              # no background color (four line)