/usr/share/perl5/Config/MVP/Reader/Finder.pm is in libconfig-mvp-perl 2.200010-1.
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 | package Config::MVP::Reader::Finder;
# ABSTRACT: a reader that finds an appropriate file
$Config::MVP::Reader::Finder::VERSION = '2.200010';
use Moose;
extends 'Config::MVP::Reader';
#pod =head1 DESCRIPTION
#pod
#pod The Finder reader multiplexes many other readers that implement the
#pod L<Config::MVP::Reader::Findable> role. It uses L<Module::Pluggable> to search
#pod for modules, limits them to objects implementing the Findable role, and then
#pod selects the those which report that they are able to read a configuration file
#pod found in the config root directory. If exactly one findable configuration
#pod reader finds a file, it is used to read the file and the configuration sequence
#pod is returned. Otherwise, an exception is raised.
#pod
#pod Config::MVP::Reader::Finder's C<build_assembler> method will decline a new
#pod assembler, so if none was passed to C<read_config>, the Findable reader to
#pod which reading is delegated will be responsible for building the assembler,
#pod unless a Finder subclass overrides C<build_assembler> to set a default across
#pod all possible delegates.
#pod
#pod =cut
use Config::MVP::Error;
use Module::Pluggable::Object;
use Try::Tiny;
#pod =method default_search_path
#pod
#pod This is the default search path used to find configuration readers. This
#pod method should return a list, and by default returns:
#pod
#pod qw( Config::MVP::Reader )
#pod
#pod =cut
sub default_search_path {
return qw(Config::MVP::Reader)
}
our @DONT_FIND;
has _module_pluggable_object => (
is => 'ro',
init_arg => undef,
default => sub {
my ($self) = @_;
Module::Pluggable::Object->new(
search_path => [ $self->default_search_path ],
inner => 0,
require => 1,
# This facility here entirely for testing. -- rjbs, 2014-07-02
except => \@DONT_FIND,
);
},
);
sub _which_reader {
my ($self, $location) = @_;
my @options;
for my $pkg ($self->_module_pluggable_object->plugins) {
next unless $pkg->isa('Moose::Object');
next unless $pkg->does('Config::MVP::Reader::Findable');
my $location = $pkg->refined_location($location);
next unless defined $location;
push @options, [ $pkg, $location ];
}
Config::MVP::Error->throw("no viable configuration could be found")
unless @options;
# XXX: Improve this error message -- rjbs, 2010-05-24
Config::MVP::Error->throw("multiple possible config plugins found")
if @options > 1;
return {
'package' => $options[0][0],
'location' => $options[0][1],
};
}
has if_none => (
is => 'ro',
isa => 'Maybe[Str|CodeRef]',
);
sub read_config {
my ($self, $location, $arg) = @_;
$self = $self->new unless blessed($self);
$arg ||= {};
local $arg->{assembler} = $arg->{assembler} || $self->build_assembler;
my $which;
my $instead;
try {
$which = $self->_which_reader($location);
} catch {
die $_ unless $_ =~ /^no viable configuration/;
die $_ unless defined (my $handler = $self->if_none);
$instead = $self->$handler($location, $arg);
};
return $instead unless $which;
my $reader = $which->{package}->new;
return $reader->read_config( $which->{location}, $arg );
}
sub build_assembler { }
sub read_into_assembler {
confess "This method should never be called or reachable";
}
no Moose;
__PACKAGE__->meta->make_immutable;
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Config::MVP::Reader::Finder - a reader that finds an appropriate file
=head1 VERSION
version 2.200010
=head1 DESCRIPTION
The Finder reader multiplexes many other readers that implement the
L<Config::MVP::Reader::Findable> role. It uses L<Module::Pluggable> to search
for modules, limits them to objects implementing the Findable role, and then
selects the those which report that they are able to read a configuration file
found in the config root directory. If exactly one findable configuration
reader finds a file, it is used to read the file and the configuration sequence
is returned. Otherwise, an exception is raised.
Config::MVP::Reader::Finder's C<build_assembler> method will decline a new
assembler, so if none was passed to C<read_config>, the Findable reader to
which reading is delegated will be responsible for building the assembler,
unless a Finder subclass overrides C<build_assembler> to set a default across
all possible delegates.
=head1 METHODS
=head2 default_search_path
This is the default search path used to find configuration readers. This
method should return a list, and by default returns:
qw( Config::MVP::Reader )
=head1 AUTHOR
Ricardo Signes <rjbs@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2015 by Ricardo Signes.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|