#!/bin/sh

# Based on Enrico's snippet for using pdflatex for building PDFs, except we're

# switching to pregenerating the docs for the SRPM so that we don't get

# different contents when we build on multiple build machines and architectures

# (timestamps and IDs change, and even some of the compressed content looks

# different).  The filename and checksum are used to verify that the PDF always

# matches the doc which was used to generate it, and we flag an error if that

# isn't the case.

create() {

	pushd "$1" > /dev/null

	touch "$2".ind

	pdflatex "$2"

	test ! -e "$2".idx || makeindex ${3:+-s "$3".ist} "$2".idx

	pdflatex "$2"

	pdflatex "$2"

	sum=`sha1sum "$2".tex | sed 's,[[:blank:]].*,,g'`

	sed -ri \

		-e 's|^/ID \[<.{32}> <.{32}>\]|/ID [<'"$1/$2"'> <'"$sum"'>]|g' \

		"$2".pdf

	popd > /dev/null

}

check() {

	pushd "$1" > /dev/null

	sum=`sha1sum "$2".tex | sed 's, .*,,g'`

	id=`sed -rn -e '/^\/ID \[<[^>]*> <[^>]*>\]/p' "$2".pdf`

	filename=`echo "$id" | sed -r 's|^.*\[<([^>]*)> <([^>]*)>\].*|\1|g'`

	checksum=`echo "$id" | sed -r 's|^.*\[<([^>]*)> <([^>]*)>\].*|\2|g'`

	echo $filename

	echo $checksum $sum

	popd > /dev/null

	test "$filename" = "$1/$2" && test "$checksum" = "$sum"

}

mode=$1

case $mode in

	create)

	while read subdir doc style ; do

		if ! create $subdir $doc $style ; then

			exit 1

		fi

	done

	;;

	check)

	while read subdir doc style ; do

		if ! check $subdir $doc $style ; then

			exit 1

		fi

	done

	;;

esac

exit 0