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#!/usr/bin/env perl
=pod
=head1 NAME
biburl2doi.pl - convert URLs pointing to doi.org to DOIs
=head1 SYNOPSIS
biburl2doi [B<-D>] [B<-o> I<output>] I<bib_file>
=head1 OPTIONS
=over 4
=item B<-D>
Do not delete URLs converted to DOIs
=item B<-o> I<output>
Output file. If this option is not used, the name for the
output file is formed by adding C<_cleaned> to the input file
=back
=head1 DESCRIPTION
The script recognizes URL fields of the kind
C<http://dx.doi.org> and their variants and converts them to DOI
fields.
=head1 AUTHOR
Boris Veytsman
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2017 Boris Veytsman
This is free software. You may redistribute copies of it under the
terms of the GNU General Public License
L<http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the
extent permitted by law.
=cut
use strict;
BEGIN {
# find files relative to our installed location within TeX Live
chomp(my $TLMaster = `kpsewhich -var-value=SELFAUTOPARENT`); # TL root
if (length($TLMaster)) {
unshift @INC, "$TLMaster/texmf-dist/scripts/bibtexperllibs";
}
}
use IO::File;
use BibTeX::Parser;
use LaTeX::ToUnicode qw (convert);
use Getopt::Std;
my $USAGE="USAGE: $0 [-D] [-o output] file\n";
my $VERSION = <<END;
biburl2doi 1.0
This is free software. You may redistribute copies of it under the
terms of the GNU General Public License
http://www.gnu.org/licenses/gpl.html. There is NO WARRANTY, to the
extent permitted by law.
$USAGE
END
our %opts;
getopts('Do:hV',\%opts) or die $USAGE;
if ($opts{h} || $opts{V}){
print $VERSION;
exit 0;
}
################################################################
# Defaults and parameters
################################################################
my $inputfile = shift;
my $outputfile = $inputfile;
$outputfile =~ s/\.([^\.]*)$/_cleaned.$1/;
if (exists $opts{o}) {
$outputfile = $opts{o};
}
my $deleteUrl = 1;
if (exists $opts{D}) {
$deleteUrl = 0;
}
my $input= IO::File->new($inputfile) or
die "Cannot find BibTeX file $inputfile\n$USAGE\n";
my $output = IO::File->new("> $outputfile") or
die "Cannot write to $outputfile\n$USAGE\n";
my $parser=new BibTeX::Parser($input);
# Processing the input
while (my $entry = $parser->next) {
if (!$entry->parse_ok()) {
print STDERR "Cannot understand entry: ";
$entry->print(*STDERR);
print STDERR "Skipping this entry\n";
next;
}
if ($entry->has('doi') || !$entry->has('url')) {
print $output $entry->raw_bibtex(), "\n\n";
next;
}
if ($entry->field('url') =~ m|^http(?:s)?://(?:dx\.)?doi\.org/(.*)$|) {
$entry->field('doi', $1);
if ($deleteUrl) {
delete $entry->{'url'};
}
print $output $entry->to_string(), "\n\n";
} else {
print $output $entry->raw_bibtex(), "\n\n";
}
}
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