Re-generating reference file for BibLatex

vkregeneratebiblatexreferences.sh

#!/bin/bash

## this script parses *.aux files (LaTeX/bibtex temporary files) in 
## the current directory, extracts cited references and re-generates
## a biblatex-file 

RESULTFILE=newreferences.bib
REFERENCESTMPFILE=`mktemp`
TMPFILE=`mktemp`

handle_outputfile_found()
{
    echo
    echo "ERROR: I already found file \"${RESULTFILE}\". To prevent data loss, I quit now."
    echo
    exit 1
}

handle_no_auxfile_found()
{
    echo
    echo "ERROR: I found no file with an \".aux\" extension in the current folder."
    echo
    exit 2
}

handle_no_bibtexfile_found()
{
    echo "WARNING: I found no bibtex-file \"${1}\". Continuing ...."
}

generate_result_file_from_referred_papers()
{
    referredpapers=`cat ${REFERENCESTMPFILE}`

    for currentref in ${referredpapers}; do
        #echo "do: ${currentref}";
        nextfile="${HOME}/archive/library/${currentref}.bib"
        if [ -f "${nextfile}" ]; then
    	cat "${nextfile}" >> "${RESULTFILE}"
        else
    	handle_no_bibtexfile_found "${nextfile}"
        fi
    done
}

[ -f "${RESULTFILE}" ] && handle_outputfile_found
touch "${RESULTFILE}"
#echo "Creating new output reference file: ${RESULTFILE}"

numaux=`ls -l *aux | wc -l`
[ ${numaux} -eq 0 ] && handle_no_auxfile_found

referredpapers=`grep citekey *bcf | sed 's/.*<bcf:citekey>//' | sed 's#</bcf:citekey>.*##' | sort | uniq > "${REFERENCESTMPFILE}"`

generate_result_file_from_referred_papers


## resolving cross references:

crossreferences=`grep -i crossref ${RESULTFILE} | sed 's/.*{//' | sed 's#}.*##' >> "${REFERENCESTMPFILE}"`
rm ${RESULTFILE}  ## will be re-generated with previous citations *and* crossrefs

sort "${REFERENCESTMPFILE}" | uniq > ${TMPFILE}
mv "${TMPFILE}" "${REFERENCESTMPFILE}"

generate_result_file_from_referred_papers


rm ${REFERENCESTMPFILE}
echo "successfully finished writing: ${RESULTFILE}"

#end