#! /bin/sh
#
# Convert Hyperlatex documents to dvi, html, or gif's

if [ -z "$HYPERLATEX_SYS_DIR" ]; then

## Edit the following line to reflect your choice of the
## Hyperlatex directory:

  HYPERLATEX_SYS_DIR="$HOME/Hyperlatex/Hlx"
fi

if [ -z "$HYPERLATEX_DIR" ]; then
  HYPERLATEX_DIR=$HYPERLATEX_SYS_DIR
else
  HYPERLATEX_DIR=$HYPERLATEX_DIR:$HYPERLATEX_SYS_DIR
fi

export HYPERLATEX_DIR

EMACS=/usr/local/bin/emacs
if [ ! -x $EMACS ]; then
  EMACS=/usr/bin/emacs
  if [ ! -x $EMACS ]; then
    EMACS=/sw/bin/emacs
    if [ ! -x $EMACS ]; then
      echo "hyperlatex: cannot find emacs" 1>&2
    fi
  fi
fi

usage() {
  echo "usage: hyperlatex [ -html | -dvi | -image | -gif | -png] file" 1>&2
  exit 1
}

[ $# -lt 1 ] && usage

run_latex=0
make_images=0

case $1 in
  -html)
    shift;;
  -dvi)
    run_latex=1
    latex_flag=
    make_images=0
    shift;;
  -gif)
    run_latex=1
    latex_flag='\def\makeimages{}'
    make_images=1
    shift;;
  -png)
    run_latex=1
    latex_flag='\def\makeimages{}'
    make_images=1
    shift;;
  -image)
    run_latex=1
    latex_flag='\def\makeimages{}'
    make_images=1
    shift;;
  -*)
    usage
esac

if [ $# -lt 1 ]; then
  echo "hyperlatex: no file specified" 1>&2
  exit 2
fi

case $1 in
  *.tex) name=$1;;
  *.ltx) name=$1;;
  *)     name=$1.tex
esac

if [ ! -r $name ]; then
  echo "hyperlatex: Cannot find file "\"$name\" 1>&2
  exit 2
fi

if [ $run_latex -eq 1 ]; then
  latex "$latex_flag\input{$name}"
  if [ $? -eq 0 -a $make_images -eq 1 ]; then
    script=`echo $name | sed -e 's/\.tex$/.makeimage/'`
    /bin/sh $script
  fi

else

  HLXEL=$HYPERLATEX_SYS_DIR/hyperlatex.elc
  if [ ! -r $HLXEL ]; then
    HLXEL=$HYPERLATEX_SYS_DIR/hyperlatex.el
  fi
    
  $EMACS -batch -no-init-file -no-site-file \
    -l $HLXEL -funcall batch-hyperlatex-format \
    $name

fi