Shell script to get BibTeX citations from PDF. For use in .bib files that you use to do references in LaTeX.

pdfbib-citer

#!/bin/env bash

#https://gist.github.com/Fitzy1293/5c6019479456054b267764354df2a899

if [ $# -eq 0 ]; then
    echo "Enter a pdf to create a bibtex citation for"
    ls *.pdf | tr ' ' '\n'
    exit 1
fi

if [ ! -f $1 ]; then
    echo "$1 does not exist"
    exit 1
fi

inFnameNoExtension="$(echo $1 | cut -d "." -f 1)"
outFname="$inFnameNoExtension.txt"

pdftotext -layout $1 $outFname -l 25

# ==============================================================================================

# Tries to get a bibtex citation from a doi.
doiFind="$(awk '/doi:/+/DOI:/' $outFname | head -n 1 | sed -e 's/\s//g' -e 's/.*://' | grep -o -E "[0-9]|\.|\/")"
doi="doi:$(echo $doiFind | sed 's/ //g')"
crossrefEndpoint="http://api.crossref.org/works/$doi/transform/application/x-bibtex"
crossref="$(curl -s $crossrefEndpoint)"
if ! echo $crossref | head -n 1 | grep -q "Resource" ; then
    echo "$crossref"
    exit 0
fi

# ==============================================================================================

# Tries to use an isbn to get bibtex.
# Example isbn for boas, math methods in the physical sciences
  #ISBN 0-471-19826-9
  #0471198269

isbn="$(grep -m 1 -o "ISBN .*" $outFname | sed 's/[^0-9]*//g')"

isbnSearch="$(curl -s "https://www.ottobib.com/isbn/$isbn" | grep -A 10 "@Book")"
bookBibReference="$(echo $isbnSearch | grep -o "@Book.*"\
| sed -e 's/<.*//'\
 -e 's/}, /},\n/g'\
 -e 's/, author/,\nauthor/'\
 -e 's/} }/}\n}/')"

echo "$bookBibReference" | head -n 1
echo "$bookBibReference" | grep -i "^[a-z]" | sed 's/^/\t/g'
echo "$bookBibReference" | tail -n 1

# ==============================================================================================

exit 0