#!/bin/bash
#
# Syntax:  ltl [-p] [-f] [-h]
#
# Purpose: Processes the most recently changed .tex file in the
#          current directory. If option -p is specified, the
#          corresponding postscript file will also be generated.
#          If option -f is specified, the corresponding pdf file
#          will also be generated (also works for beamer presentations).
#          The -h flag shows the help info for this command.

# Created: Aug 19, 1998       by Bart De Schutter
# Last revised: Nov 18, 2012  by Bart De Schutter
#
# See http://www.deschutter.info/util/scripts.html for the latest version of
# this script.

# Status: public
# Category: latex

make_ps=0
make_pdf=0
while getopts :pfh option
do
   case "$option" in
      p) make_ps=1;;
      f) make_pdf=1;;
      h) sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
         exit 1;;
     \?) echo >&2
         echo >&2 "Unknown option: $OPTARG"
         echo >&2
         sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
         exit 1;;
   esac
done
shift $(($OPTIND-1))

if [ $# -ne 0 ];
then 
   echo >&2
   echo >&2 "ERROR: ${0##*/} requires no input arguments."
   echo >&2
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

texfile=$( (ls -t *.tex | head -1) 2>/dev/null )

if [ -n "$texfile" ];
then
   echo "Processing $texfile ."
   latex "$texfile"
   base="${texfile%.tex}"
   dvifile="${base}.dvi"
   if [  $make_ps -eq 1  -a  "$dvifile" -nt "$texfile"  ];
   then
      dvips -o "${base}.ps" "$dvifile"
   fi
   if [  $make_pdf -eq 1  -a  "$dvifile" -nt "$texfile"  ];
   then
      # Check whether the file is a beamer file (requires option -t none 
      # in dvi2pdf)
      grep \\\\documentclass "$texfile" | grep -E "beamer|tudprosper" > /dev/null 2>&1
      if [ $? == 0 ]
      then
         dvi2pdf -t none "$dvifile"
      else
         dvi2pdf "$dvifile"
      fi
   fi
else
   echo "No .tex files found."
fi