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#!/usr/local/bin/perl -w
#
# btsort
#
# Reads an entire BibTeX file, sorts the entries, and spits them back out
# again.
#
# $Id: btsort 8426 2010-02-14 17:31:19Z ambs $
#
use strict;
use Text::BibTeX (':metatypes');
my ($filename, $structure, @options, $bibfile, $entry, %sortkey, @entries);
die "usage: btcheck file [structure [options]]\n" unless @ARGV >= 1;
($filename, $structure, @options) = @ARGV;
$structure ||= 'Bib';
$bibfile = new Text::BibTeX::File $filename or die "$filename: $!\n";
$bibfile->set_structure ('Bib', @options);
while ($entry = new Text::BibTeX::Entry $bibfile)
{
next unless $entry->parse_ok && $entry->metatype == BTE_REGULAR;
$entry->check;
$sortkey{$entry} = $entry->sort_key;
push (@entries, $entry);
}
$bibfile->close;
@entries = sort { $sortkey{$a} cmp $sortkey{$b} } @entries;
$entry->print while $entry = shift @entries;
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