#!/usr/bin/env bash
#
# this generates A PDF from a HTML file

if [ ! -x _build/build.sh ] ; then
  echo "ERROR: script must be run in root of docs dir"
  exit 1
fi

if [ "$#" -lt 2 ] ; then
	echo "Usage: build-pdf.sh <source html> <target PDF> [user-style-sheet]"
	exit 1
fi

if ! command -v wkhtmltopdf >/dev/null 2>&1; then
	echo "ERROR: script requires wkhtmltopdf but it's not installed."
	exit 1
fi
	
# run the PDF build with wkhtmltopdf
wkhtmltopdf ${3:+--user-style-sheet $3} --page-size Letter --margin-top 0.75in --margin-right 0.75in --margin-bottom 0.75in --margin-left 0.75in --encoding UTF-8 $1 $2

if [ $? -eq 1 ] ; then
	echo "Note that ContentNotFoundError is usually because of the invalid relational path of a local resource such as an image"
elif [ $? -eq 0 ] ; then
	echo "PDF Built successfully."
else 
	exit $?
fi