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#!/usr/bin/env perl
use strict;
=head1 NAME
comments - remove everyting between C<< <!-- BEGIN/END COMMENT --> >>
=head1 DESCRIPTION
Pandoc filter to ignore everything between C<< <!-- BEGIN COMMENT --> >> and
C<< <!-- END COMMENT --> >> The comment lines must appear on lines by
themselves, with blank lines surrounding them.
=cut
use Pandoc::Filter;
my $incomment = 0;
pandoc_filter sub {
my $e = shift;
if ( $e->name eq 'RawBlock' and $e->format eq 'html' ) {
if ( $e->content =~ /^\s*<!--\s*(BEGIN|END)\s+COMMENT\s*-->\s*$/ ) {
$incomment = $1 eq 'BEGIN';
return [];
}
}
return $incomment ? [] : undef;
};
=head1 SYNOPSIS
pandoc --filter comments.pl -o output.html < input.md
=head1 SEE ALSO
This is a port of
L<comments.py|https://github.com/jgm/pandocfilters/blob/master/examples/comments.py>
from Python to Perl with L<Pandoc::Elements> and L<Pandoc::Filter>.
=cut
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