#!/bin/bash
#
# sch2pdf - Generate PDF from schematics, using eeshow
#
# Written 2016 by Werner Almesberger
# Copyright 2016 by Werner Almesberger
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#

#
# Known bugs:
# - expects first sheet to be index page
# - only renders sub-sheets
# - has all the limitations of eeshow (see TODO)
#


usage()
{
	cat <<EOF 1>&2
usage: $0 [-n first_num] [-o output.pdf] [-q] [-t template.fig ]
	  file.lib ... file.sch
EOF
	exit 1
}


out=out.pdf
quiet=false
template=
num=1
while [ "$1" ]; do
	case "$1" in
	-n)	num=$2
		shift 2;;
	-o)	out=$2
		shift 2;;
	-q)	quiet=true
		shift;;
	-t)	template="-t $2"
		shift 2;;
	-*)	usage;;
	*)	break;;
	esac
done

[ "$1" ] || usage

libs=
while [ "$2" ]; do
	libs="$libs $1"
	shift
done

./eeshow $libs "$1" \
    -- fig $template "TITLE=`basename \"$1\" .sch`" NUMBER=$num |
    fig2dev -L pdf >"$out"

sheet=false
while read line; do
	if ! $sheet; then
		[ "${line#\$Sheet}" != "$line" ] && sheet=true
		continue
	else
		if [ "${line#\$EndSheet}" != "$line" ]; then
			sheet=false
			continue
		fi
	fi

	if [ "${line#F0 \"}" != "$line" ]; then
		name=${line#F0 \"}
		name=${name%%\"*}
	fi
	[ "${line#F1 \"}" = "$line" ] && continue
	file=${line#F1 \"}
	file=${file%%\"*}

	num=`expr $num + 1`

	$quiet || echo "$file" 1>&2
	./eeshow $libs `dirname "$1"`/$file \
	    -- fig $template "TITLE=$name" NUMBER=$num |
	    fig2dev -L pdf >_tmp.pdf
	pdfunite "$out" _tmp.pdf _tmp2.pdf
	mv _tmp2.pdf "$out"
done <"$1"
exit