#!/bin/sh
#-------------------------------------------------------------------------------
# bib2pdf  --  Script to convert BibTeX files to PDF
# cb2Bib Tools
#
# Copyright (C) 2005-2015 by Pere Constans
# constans@molspaces.com
#
# Improvements and modifications:
# Copyright (C) 2009 by Filippo Rusconi
# rusconi@mnhn.fr
#
# May/June 2009:
# - Added checks to ensure that the used commands are available on
#   system.
# - Make use of mktemp to create a temp directory.
#
# See LICENSE file that comes with this distribution
#
# Usage: bib2pdf input_bib output_pdf
#-------------------------------------------------------------------------------

#-------------------------------------------------------------------------------
# Init variables
#-------------------------------------------------------------------------------
# Modify accordingly, by choosing either pdflatex or latex+dvipdfm
#latexCmd=pdflatex
latexCmd=latex ; dvi2pdfCmd=dvipdfm

bibtexCmd=bibtex
#-------------------------------------------------------------------------------

# Immediately check that the needed programs are there:
"${latexCmd}" --version > /dev/null 2>&1

if [ "$?" != "0" ]
then
    echo "Program ${latexCmd} (LaTeX software) is required."
    echo "Ending processing."
    exit 1
fi

"${bibtexCmd}" --version > /dev/null 2>&1

if [ "$?" != "0" ]
then
    echo "Program ${bibtexCmd} (BibTeX software) is required."
    echo "Ending processing."
    exit 1
fi

# Special case with dvi2pdf:

if [ "x${dvi2pdfCmd}" != "x" ]
then
    "${dvi2pdfCmd}" --version | head -n2 | grep dvipdfm > /dev/null 2>&1
    if [ "$?" != "0" ]
    then
	echo "Program ${dvi2pdfCmd} (LaTeX software) is required."
	echo "Ending processing."
	exit 1
    fi	
fi


# Make sure we trap errors (we put that after the tests above because
# we need the tests to fail, in case, without exiting immediately).
set -e

# Getting filenames from command line
echo "cb2Bib Tools: Script to convert BibTeX to PDF"
if test "$#" != 2; then
  cat <<EOF
Usage: $0 input_bib output_pdf
EOF
  exit 2
fi


# Init some other variables (Modify accordingly) and create temporary
# directory.
latex_flags="-interaction=nonstopmode"
# Note that we use the mktemp utility that ensures that
# we do not overwrite any preexisting directory.
tmp_dir=$(mktemp -d --tmpdir c2b_tools_tmp.XXXXXXXX)


# Setting files
bib="$1"
pdf="$2"
work_dir="$PWD"

cat > "${tmp_dir}"/c2b_tmp.tex <<EOF
\documentclass[a4paper,10pt]{article}
%\documentclass[letterpaper,10pt]{article}
\pagenumbering{roman}
\bibliographystyle{unsrt}

\oddsidemargin 0.0in 
\evensidemargin 1.0in 
\textwidth 6.0in 
\headheight 0.0in 
\topmargin 0.in 
\textheight 9.0in 

\begin{document}

\nocite{*}
\bibliography{c2b_tmp}

\end{document}

EOF
cp "$bib" "${tmp_dir}"/c2b_tmp.bib

# LaTeX procedure (Modify accordingly)
cd "${tmp_dir}"
# There might be bibliography errors, do not stop.
set +e
"${latexCmd}" $latex_flags c2b_tmp > /dev/null 2>&1
"${bibtexCmd}" c2b_tmp
"${latexCmd}" $latex_flags c2b_tmp > /dev/null 2>&1
"${latexCmd}" $latex_flags c2b_tmp
if [ "x${dvi2pdfCmd}" != "x" ]
then
    "${dvi2pdfCmd}" c2b_tmp > /dev/null 2>&1
fi

# Make sure we trap errors.
set -e

# Clean up
cd "${work_dir}"
cp "${tmp_dir}"/c2b_tmp.pdf "$pdf"
rm -rf "${tmp_dir}"
echo "$0 ended."
