#!/bin/sh

function help() {
    cat <<EOF
Usage:
  $0 [options] -t tag file

tag is the tag for which you'd like to create a changebar listing.

-h	Help
-t tag	the tag for which you'd like to create a changebar listing
--tex	Output tex file.
--dvi	Output dvi file.
--ps	Output ps file.
--pdf	Output pdf file
EOF
exit 1
}


TEMP=`getopt -o ht:o: --long ps,pdf,dvi,tex \
     -n $0 -- "$@"`

if [ $? != 0 ] ; then help ; fi

TEX=true
KEEP=tex

eval set -- "$TEMP"

while true
  do
  case "$1" in
      -h) help ; exit 1;;
      -t) TAG=$2; shift 2;;
      --tex) TEX=true; shift;;
      --ps) TEX=true; DVI=true; PS=true; KEEP=ps; shift ;;
      --pdf)TEX=true; DVI=true; PS=true; PDF=true ; KEEP=pdf; shift;;
      --dvi)TEX=true; DVI=true; KEEP=dvi; shift;;
      --) shift ; break ;;
      *) echo "Internal error! \"$1\"" ; exit 1 ;;
  esac
done

if [ -z "$TAG" ] ; then
    help
    exit 1
fi

for TEXFILE 
  do
  OLDTEXFILE=`basename $TEXFILE .tex`-old.tex
  CBBASE=`basename $TEXFILE .tex`-$TAG
  
  cvs update -p -r$TAG $TEXFILE > $OLDTEXFILE
  
  if [ ! -z "$TEX" ] ; then
      chbar.sh $OLDTEXFILE $TEXFILE $CBBASE.tex
      rm $OLDTEXFILE
  fi
  
  if [ ! -z "$DVI" ] ; then 
      latexmk $CBBASE
  fi
  
  if [ ! -z "$PS" ] ; then
      dvips $CBBASE -o $CBBASE.ps
  fi

  if [ ! -z "$PDF" ] ; then 
      ps2pdf $CBBASE.ps $CBBASE.pdf
  fi

  rm `ls $CBBASE*|grep -v $KEEP`

done