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#!/bin/sh
[ -z "$1" ] && echo "Give either a pdf file or a DOI as an argument." && exit
if [ -f "$1" ]; then
# Try to get DOI from pdfinfo or pdftotext output.
doi=$(pdfinfo "$1" | grep -io "doi:.*") ||
doi=$(pdfinfo "$1" | grep -io "Digital Object Identifier.*") ||
doi=$(pdftotext "$1" - | grep -io "doi:.*" -m 1) ||
doi=$(pdftotext "$1" - | grep -io "DOI:.*" -m 1) ||
doi=$(pdftotext "$1" - | grep -io "doi.org/.*" -m 1) ||
doi=$(pdftotext "$1" - | grep -io "Digital Object Identifier.*" -m 1) ||
exit 1
else
doi="$1"
fi
# DOI never has spaces, so we can always take the last word in line
doi=$(echo "$doi" | awk '{ print $NF }')
echo "Detected DOI: $doi"
# Check crossref.org for the bib citation.
curl -s "http://api.crossref.org/works/$doi/transform/application/x-bibtex" -w "\\n"
#wget "https://doi.org/$doi"
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