#!/bin/sh5
#
# Author:  Dag Asheim, email: dash@ifi.uio.no
#
# bib2dvi:  From a .bib sourcefile generate a printable .dvi file.
#
# The .dvi file is formated with filename and date on top.
# Uses bibliography style 'plain' and LaTeX-option 'a4' by default.
# Changable with options -b and -l.
#
# \bibitem{dummy} is filtered out if present (it is dummy after all).
#
# Assumes bibtex and latex in path, in addition to standard shell utilities:
# basename, getopt, [, ls, wc, echo, expr, dirname, ln, sed, cat, rm, mv, awk

#PATH=/bin:/usr/bin:/usr/ucb:/usr/local/bin

USAGE='usage:  '`basename $0`' [-h|t] [-l LaTeX-options] [-i input.tex] [-b BiBTeX-style] [file.bib]'

BIBSTYLE=plain
LATEXOPT=fullpage
KEEPTEXF=false
INPUT=/u/smann/lib/null.tex
CWD=`pwd`

set -- `getopt htl:b:i: $* || echo ERROR`
if [ "$*" = ERROR ]
then
	echo "$USAGE" 1>&2
	exit 1
fi

for arg in $*
do
        case $arg in
                -h)     exec 1>&2
			echo "$USAGE"
			cat << 'EOF'

From a .bib sourcefile generate a printable .dvi file.

The .dvi file is formated with filename and date on top.
Uses bibliography style 'plain' and LaTeX-options 'a4' by default.
Changable with options -b and -l.  

\bibitem{dummy} is filtered out if present.
EOF
			exit 0;      shift;shift;;
                -l)     LATEXOPT=$2; shift;shift;;
                -b)     BIBSTYLE=$2; shift;shift;;
		-i)	INPUT=$CWD/$2;    shift;shift;;
                -t)     KEEPTEXF=true;	   shift;;
                --)     shift; break 2;;
        esac
done

if [ $# -eq 0 ]	
then
	if [ `ls *.bib 2> /dev/null | wc -w` -eq 1 ]
	then
		BIBALL=`ls *.bib`
	elif  [ `ls *.bib 2> /dev/null | wc -w` -eq 0 ]
	then
		echo "No .bib file on current working directory." 1>&2
		echo "$USAGE" 1>&2
		exit 1
	else
		exec 1>&2
		echo "Ambiguous number of .bib files on current directory:"
		ls *.bib
		echo "$USAGE"
		exit 1
	fi
elif [ $# -eq 1 ]
then
	if [ -f $1 ]
	then
		BIBALL=$1
	else
		echo "Argument not an existing file." 1>&2
		echo "$USAGE" 1>&2
		exit 1
	fi
else
	echo "Wrong number of arguments." 1>&2
	echo "$USAGE" 1>&2
	exit 1
fi

OLDDIR=`pwd`
BIBLIO=`basename $BIBALL .bib`

if [ $KEEPTEXF != true ]
then
	if expr x$BIBALL : x/ > /dev/null
	then
		BIBDIR=`dirname $BIBALL`
	else
		BIBDIR=$OLDDIR/`dirname $BIBALL`
	fi

	cd /tmp

	if [ -f $BIBLIO.aux \
		 -o -f $BIBLIO.blg \
		 -o -f $BIBLIO.log \
		 -o -f $BIBLIO.bbl \
		 -o -f $BIBLIO.tex \
		 -o -f $BIBLIO.bib ]
	then
		exec 1>&2
		echo "Filename conflict (on /tmp):"
		for i in $BIBLIO.blg $BIBLIO.log $BIBLIO.bbl $BIBLIO.tex $BIBLIO.bib
		do
			if [ -f $i ]
			then
				echo "	$i"
			fi
		done

		echo "Aborting."
		exit 1
	fi

	ln -s $BIBDIR/$BIBLIO.bib

	sed -e "s/xxx/${BIBLIO}/" -e "s/yyy/${BIBSTYLE}/" > $BIBLIO.aux << EOF
\relax 
\citation{*}
\bibdata{xxx}
\bibstyle{yyy}
EOF

	if (echo "hi\c" ; echo " ") | grep -s c	# How to suppress newlines?
	then
	    N='-n'				# ...using -n.
	    C=''
	else
	    N=''
	    C='\c'				# ...using \c
	fi

trap 'cd /tmp; rm -f $BIBLIO.aux $BIBLIO.bbl $BIBLIO.bib $BIBLIO.blg $BIBLIO.log $BIBLIO.tex; exit 1' 2 3

	echo $N bibtex...$C

	if bibtex $BIBLIO | grep -s error
	then
		exec 1>&2
		echo
		echo "BiBTeX detected an error:"
		echo
		cat $BIBLIO.blg
		echo
		rm $BIBLIO.aux $BIBLIO.bbl $BIBLIO.bib $BIBLIO.blg
		exit 1
	fi

	mv $BIBLIO.bbl $BIBLIO.blg
	awk 	'BEGIN			{RS = ""; FS = "\n"; OFS = "\n"; ORS = "\n\n"}
		 /^\\bibitem{dummy}/	{next}
					{print}' < $BIBLIO.blg > $BIBLIO.bbl
fi

#sed -e "s/xxx/${BIBLIO}/" -e "s/yyy/${LATEXOPT}/" -e "s/zzz/${BIBSTYLE}/" -e "s/xyz/${INPUT}/" > $BIBLIO.tex << EOF
sed -e "s/xxx/${BIBLIO}/" -e "s/yyy/${LATEXOPT}/" -e "s/zzz/${BIBSTYLE}/" > $BIBLIO.tex << EOF
\batchmode
\documentstyle[yyy]{article}
\begin{document}
\input{${INPUT}}
\centerline{\bf xxx.bib}
\centerline{\today}
\sloppypar
\nocite{*}
\bibliographystyle{zzz}
\bibliography{xxx}
\end{document}
EOF

if [ $KEEPTEXF = true ]
then	exit 0
fi

echo $N " latex..."$C

echo bye | latex $BIBLIO > /dev/null

if grep -s "^!" $BIBLIO.log
then
	exec 1>&2
	echo
	echo "LaTeX detected an error:"
	awk 	'/^!/	{PRINT=1; print ""}
	 	/^$/	{PRINT=0}
			{if (PRINT) print}' < $BIBLIO.log
	rm $BIBLIO.aux $BIBLIO.bbl $BIBLIO.bib $BIBLIO.blg $BIBLIO.log $BIBLIO.tex
	exit 1
fi

rm -f $BIBLIO.aux $BIBLIO.bbl $BIBLIO.bib $BIBLIO.blg $BIBLIO.log $BIBLIO.tex
mv $BIBLIO.dvi $OLDDIR/$BIBLIO.dvi
echo " done."