#!/bin/sh
#
# gitsch2ppm - Generate PPM files for KiCad schematics in git
#
# Written 2010 by Werner Almesberger
# Copyright 2010 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.
#


usage()
{
    cat <<EOF 1>&2
usage: $0 [options] top-dir top-schem [commit] outdir

  -c         use cached Postscript files (from previous run, with -k)
  -k         keep checked-out tree (for immediate reuse with -c)
  -r XxY     image resolution (default: $RES)
  -S         sanitize the KiCad profile
  -w points  Postscript line width (default: $LINEWIDTH)
EOF
    exit 1
}


cache=false
keep=false
res=
sanitize=
width=
while true; do
    case "$1" in
    -c)	cache=true
	shift;;
    -k)	keep=true
	shift;;
    -r)	[ -z "$2" ] && usage
	res="-r $2"
	shift 2;;
    -S) sanitize=-S
	shift;;
    -w)	[ -z "$2" ] && usage
	width="-r $2"
	shift 2;;
    -*)
	usage;;
    *)
	break;;
    esac
done

tmp=`pwd`/_gitsch2ppm
eval outdir=\${$#}

# with thanks to http://www.faqs.org/faqs/unix-faq/faq/part2/section-12.html
argv=
while [ $# -gt 1 ]; do
    argv="$argv \"$1\""
    shift
done
eval set x "$argv"
shift

if ! $cache; then
    rm -rf "$tmp"
    rm -rf "$outdir"
    gitsch2ps $sanitize "$@" "$tmp"
    for n in "$tmp"/*.ps; do
	normalizeschps $width "$n"
    done
fi

mkdir -p "$outdir"
for n in "$tmp"/*.ps; do
    schps2ppm $res "$n" "$outdir/`basename \"${n%.ps}.ppm\"`"
done

$keep || rm -rf "$tmp"