Shell script to count citations in TeX files

countbib

#!/bin/bash
#
# Counts the number of lines each citation appears on a tex file.
#
# Usage:
#
#     ./countbib texfile.tex
#

TEXFILE=$1
BIBFILE=$(cat $TEXFILE | grep "\\\bibliography" | sed "s/.*\\\bibliography{\(.*\)}.*/\1/g")
BIBENTRIES=$(cat "${BIBFILE}.bib" | grep "^@" | sed "s/^@.*{\(.*\)[^A-Za-z0-9]/\1/g")

COUNTLIST=$(
    for BIB in $BIBENTRIES; do
        LINECOUNT=$(grep $BIB $TEXFILE | wc -l)
        printf "%4s %s\n" $LINECOUNT $BIB
    done
)

echo "$COUNTLIST" | sort -n