#!/bin/bash -e

CWD=$PWD

BIB=$1
shift

if [ ! -r "$BIB" ]; then
    echo "Usage: $0 bibliography.bib [style]" >/dev/stderr
    exit 1
fi

BST=$1

if [ -z "$BST" ]; then
    echo "Using the unsrt bibliography style." >/dev/stderr
    BST=unsrt
fi

TEMP=$(mktemp -d)
trap 'rm -rf "$TEMP"' INT TERM HUP EXIT

cp -f "$BIB" "$TEMP/references.bib"
cat >"$TEMP/references.aux"<<-EOF
\bibstyle{$BST}
\citation{*}
\bibdata{references}
EOF

pushd "$TEMP" >/dev/null
bibtex references >/dev/stderr
cat references.bbl
popd >/dev/null