This file is indexed.

/usr/share/perl5/Catalyst/Restarter.pm is in libcatalyst-devel-perl 1.36-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
package Catalyst::Restarter;

use Moose;

use Cwd qw( abs_path );
use File::ChangeNotify;
use File::Spec;
use FindBin;
use Catalyst::Utils;
use namespace::clean -except => 'meta';

has start_sub => (
    is       => 'ro',
    isa      => 'CodeRef',
    required => 1,
);

has argv =>  (
    is       => 'ro',
    isa      => 'ArrayRef',
    required => 1,
);

has _watcher => (
    is  => 'rw',
    isa => 'File::ChangeNotify::Watcher',
);

has _filter => (
    is      => 'rw',
    isa     => 'RegexpRef',
);

has _child => (
    is  => 'rw',
    isa => 'Int',
);

sub pick_subclass {
    my $class = shift;

    my $subclass;
    $subclass =
        defined $ENV{CATALYST_RESTARTER}
            ? $ENV{CATALYST_RESTARTER}
            :  $^O eq 'MSWin32'
            ? 'Win32'
            : 'Forking';

    $subclass = 'Catalyst::Restarter::' . $subclass;

    Catalyst::Utils::ensure_class_loaded($subclass);

    return $subclass;
}

sub BUILD {
    my $self = shift;
    my $p    = shift;

    delete $p->{start_sub};

    $p->{filter} ||= qr/(?:\/|^)(?![.#_]).+(?:\.yml$|\.yaml$|\.conf|\.pm)$/;

    my $app_root = abs_path( File::Spec->catdir( $FindBin::Bin, '..' ) );

    # Monitor application root dir
    $p->{directories} ||= $app_root;

    # exclude t/, root/ and hidden dirs
    $p->{exclude} ||= [
        File::Spec->catdir($app_root, 't'),
        File::Spec->catdir($app_root, 'root'),
        qr(/\.[^/]*/?$),    # match hidden dirs
    ];

    # keep filter regexp to make sure we don't restart on deleted
    # files or directories where we can't check -d
    $self->_filter( $p->{filter} );

    # We could make this lazily, but this lets us check that we
    # received valid arguments for the watcher up front.
    $self->_watcher( File::ChangeNotify->instantiate_watcher( %{$p} ) );
}

sub run_and_watch {
    my $self = shift;

    $self->_fork_and_start;

    return unless $self->_child;

    $self->_restart_on_changes;
}

sub _restart_on_changes {
    my $self = shift;

    # We use this loop in order to avoid having _handle_events() call back
    # into this method. We used to do that, and the end result was that stack
    # traces became longer and longer with every restart. Using this loop, the
    # portion of the stack trace that covers this code does not grow.
    while (1) {
        my @events = $self->_watcher->wait_for_events();
        $self->_handle_events(@events);
    }
}

sub _handle_events {
    my $self   = shift;
    my @events = @_;

    my @files;
    # Filter out any events which are the creation / deletion of directories
    # so that creating an empty directory won't cause a restart
    for my $event (@events) {
        my $path = $event->path();
        my $type = $event->type();
        if (   ( $type ne 'delete' && -f $path )
            || ( $type eq 'delete' && $path =~ $self->_filter ) )
        {
            push @files, { path => $path, type => $type };
        }
    }

    if (@files) {
        print STDERR "\n";
        print STDERR "Saw changes to the following files:\n";

        for my $f (@files) {
            my $path = $f->{path};
            my $type = $f->{type};
            print STDERR " - $path ($type)\n";
        }

        print STDERR "\n";
        print STDERR "Attempting to restart the server\n\n";

        $self->_kill_child;

        $self->_fork_and_start;
    }
}

sub DEMOLISH {
    my $self = shift;

    $self->_kill_child;
}

__PACKAGE__->meta->make_immutable;

1;

__END__

=head1 NAME

Catalyst::Restarter - Uses File::ChangeNotify to check for changed files and restart the server

=head1 SYNOPSIS

    my $class = Catalyst::Restarter->pick_subclass;

    my $restarter = $class->new(
        directories => '/path/to/MyApp',
        regex       => '\.yml$|\.yaml$|\.conf|\.pm$',
        start_sub => sub { ... }
    );

    $restarter->run_and_watch;

=head1 DESCRIPTION

This is the base class for all restarters, and it also provide
functionality for picking an appropriate restarter subclass for a
given platform.

This class uses L<File::ChangeNotify> to watch one or more directories
of files and restart the Catalyst server when any of those files
changes.

=head1 METHODS

=head2 pick_subclass

Returns the name of an appropriate subclass for the given platform.

=head2 new ( start_sub => sub { ... }, ... )

This method creates a new restarter object, but should be called on a
subclass, not this class.

The "start_sub" argument is required. This is a subroutine reference
that can be used to start the Catalyst server.

=head2 run_and_watch

This method forks, starts the server in a child process, and then
watched for changed files in the parent. When files change, it kills
the child, forks again, and starts a new server.

=head1 SEE ALSO

L<Catalyst>, L<File::ChangeNotify>

=head1 AUTHORS

Catalyst Contributors, see Catalyst.pm

=head1 COPYRIGHT

This program is free software, you can redistribute it and/or modify
it under the same terms as Perl itself.

=cut