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package File::ChangeNotify::Watcher::Default;
use strict;
use warnings;
use namespace::autoclean;
our $VERSION = '0.31';
use Time::HiRes qw( sleep );
use Moo;
with 'File::ChangeNotify::Watcher';
sub sees_all_events {0}
## no critic (Subroutines::ProhibitUnusedPrivateSubroutines)
sub _always_requires_mtime {1}
## use critic
sub BUILD {
my $self = shift;
$self->_set_map( $self->_current_map );
return;
}
sub wait_for_events {
my $self = shift;
while (1) {
my @events = $self->_interesting_events;
return @events if @events;
sleep $self->sleep_interval;
}
}
sub _interesting_events {
my $self = shift;
my @interesting;
my $old_map = $self->_map;
my $new_map = $self->_current_map;
for my $path ( sort keys %{$old_map} ) {
if ( !exists $new_map->{$path} ) {
if ( $old_map->{$path}{is_dir} ) {
$self->_remove_directory($path);
}
push @interesting, $self->event_class->new(
path => $path,
type => 'delete',
);
}
else {
# If we're tracking stat info changes then we get the old & new
# stat info back in @extra. No need to stat the path _again_.
my ( $modified, @extra )
= $self->_path_was_modified( $path, $old_map, $new_map );
if ($modified) {
push @interesting, $self->event_class->new(
path => $path,
type => 'modify',
@extra,
$self->_modify_event_maybe_content_changes(
$path, $old_map, $new_map
),
);
}
}
}
for my $path ( sort grep { !exists $old_map->{$_} } keys %{$new_map} ) {
push @interesting, $self->event_class->new(
path => $path,
type => 'create',
);
}
$self->_set_map($new_map);
return @interesting;
}
sub _path_was_modified {
my $self = shift;
my $path = shift;
my $old_map = shift;
my $new_map = shift;
my $old_entry = $old_map->{$path};
my $new_entry = $new_map->{$path};
# If it's a file and the mtime or size changed we know it's been modified
# in some way.
return 1
if !$old_entry->{is_dir}
&& ( $old_entry->{stat}{mtime} != $new_entry->{stat}{mtime}
|| $old_entry->{size} != $new_entry->{size} );
if (
my @attrs = $self->_modify_event_maybe_file_attribute_changes(
$path, $old_map, $new_map
)
) {
return ( 1, @attrs );
}
return 0;
}
__PACKAGE__->meta->make_immutable;
1;
# ABSTRACT: Fallback default watcher subclass
__END__
=pod
=encoding UTF-8
=head1 NAME
File::ChangeNotify::Watcher::Default - Fallback default watcher subclass
=head1 VERSION
version 0.31
=head1 DESCRIPTION
This class implements watching by comparing two snapshots of the filesystem
tree. It if inefficient and dumb, and so it is the subclass of last resort.
Its C<< $watcher->wait_for_events >> method sleeps between
comparisons of the filesystem snapshot it takes.
=head1 SUPPORT
Bugs may be submitted at L<http://rt.cpan.org/Public/Dist/Display.html?Name=File-ChangeNotify> or via email to L<bug-file-changenotify@rt.cpan.org|mailto:bug-file-changenotify@rt.cpan.org>.
I am also usually active on IRC as 'autarch' on C<irc://irc.perl.org>.
=head1 SOURCE
The source code repository for File-ChangeNotify can be found at L<https://github.com/houseabsolute/File-ChangeNotify>.
=head1 AUTHOR
Dave Rolsky <autarch@urth.org>
=head1 COPYRIGHT AND LICENSE
This software is Copyright (c) 2009 - 2019 by Dave Rolsky.
This is free software, licensed under:
The Artistic License 2.0 (GPL Compatible)
The full text of the license can be found in the
F<LICENSE> file included with this distribution.
=cut
|
