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package App::Ack::Filter::FirstLineMatch;
=head1 NAME
App::Ack::Filter::FirstLineMatch
=head1 DESCRIPTION
The class that implements filtering files by their first line.
=cut
use strict;
use warnings;
use parent 'App::Ack::Filter';
sub new {
my ( $class, $re ) = @_;
$re =~ s{^/|/$}{}g; # XXX validate?
$re = qr{$re}i;
return bless {
regex => $re,
}, $class;
}
# This test reads the first 250 characters of a file, then just uses the
# first line found in that. This prevents reading something like an entire
# .min.js file (which might be only one "line" long) into memory.
sub filter {
my ( $self, $file ) = @_;
return $file->firstliney =~ /$self->{regex}/;
}
sub inspect {
my ( $self ) = @_;
return ref($self) . ' - ' . $self->{regex};
}
sub to_string {
my ( $self ) = @_;
(my $re = $self->{regex}) =~ s{\([^:]*:(.*)\)$}{$1};
return "First line matches /$re/";
}
BEGIN {
App::Ack::Filter->register_filter(firstlinematch => __PACKAGE__);
}
1;
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