#!/bin/bash
# 
# laps: Runs latex, then converts output to Postscript
# 
# April 15, 2001, Andrew D. Hwang, ahwang@mathcs.holycross.edu
# Sep 02, 2002, Printer options to dvips added (Walter A. Kehowski)
# Oct 04, 2002, Complete re-write, options added, defaults changed (ADH)

PROG=$(basename $0)
DVIPS_OPTS="-f"

LAPS_FILEROOT=
LAPS_VERBOSE=
LAPS_PREFIX=

function laps_parse_options {
# Command-line options start with "-"
while [ "$1" != "${1#"-"}" ]; do
    case "$1" in
 
    -vv|--verbose)
	LAPS_VERBOSE=1;
        shift;
        ;;
 
    -h|--help)
	laps_help;
        ;;
 
    -p|-ps|--ps)
	LAPS_PREFIX="ps";
	shift;
	;;

    -P*)
	DVIPS_OPTS="$1 $DVIPS_OPTS";
	shift;
	;;

    -v|--version)
	laps_version;
	;;

    *)
	laps_warn $1;
        shift;
        ;;
    esac
done

if [ "$1" = "" ]; then
    laps_die "You must specify an input file!"
else
    LAPS_FILEROOT=${1%%".tex"} # Strip .tex from filename if necessary
fi
}

function laps_compile {
if [ "$LAPS_VERBOSE" != "" ]; then
    ${LAPS_PREFIX}latex $1.tex
    dvips $DVIPS_OPTS -o $1.ps $1.dvi
else
    ${LAPS_PREFIX}latex $1.tex 1>/dev/null
    dvips $DVIPS_OPTS -o $1.ps $1.dvi &>/dev/null
fi
}

function laps_die {
    echo "$PROG: ERROR: $1" >&2 && exit 1
}

function laps_warn {
    echo "$PROG: WARNING: Ignoring unknown option \"$1\""
}

function laps_help {
    echo "Usage: $PROG [options] <filename>[.tex]" >&1

if [ "$LAPS_VERBOSE" != "" ]; then
cat <<EOF >&1

  Recognized options are:

    -vv, --verbose
      Show output messages. Mostly useful if this script hangs silently.

    -p, -ps, --ps
      Use pslatex instead of latex.

    -P<printer>
      dvips printer options, e.g. "-Pamz", may be given on the command 
      line. They are also read from ~/.dvipsrc if this file exists.

    -h, --help
      Print help message; accepts --verbose option.

    -v, --version
      Print version information; use --verbose option for license.

EOF
else
    echo "  \"$PROG --verbose -h\" for detailed help"
fi
    exit 0
} # End of laps_help

function laps_version {
cat <<VERSION1 >&1
$PROG is part of ePiX, Version 0.8.7

Copyright (C) 2001, 2002
Andrew D. Hwang <ahwang@mathcs.holycross.edu>
Department of Mathematics and Computer Science
College of the Holy Cross
Worcester, MA, 01610-2395, USA

VERSION1

if [ "$LAPS_VERBOSE" != "" ]; then
cat <<VERSION2 >&1
  ePiX 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.
 
  ePiX is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  License for more details.
 
  You should have received a copy of the GNU General Public License
  along with ePiX; if not, write to the Free Software Foundation, Inc.,
  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

VERSION2
else
    echo "  \"$PROG --verbose -v\" for license"
fi
    exit 0
} # End of laps_version

### main ###

if [ $# -eq 0 ]; then
    laps_help;
else
    laps_parse_options $@
fi

if [ ! -f $LAPS_FILEROOT.tex ]; then
    laps_die "\"$LAPS_FILEROOT.tex\" not found"

else
    laps_compile $LAPS_FILEROOT && exit 0
fi
# All branches have exited by now