1 package Catalyst::Plugin::ConfigLoader;
\r
7 use Module::Pluggable::Object ();
\r
8 use Data::Visitor::Callback;
\r
10 our $VERSION = '0.1';
\r
14 Catalyst::Plugin::ConfigLoader - Load config files of various types
\r
20 # ConfigLoader should be first in your list so
\r
21 # other plugins can get the config information
\r
22 use Catalyst qw( ConfigLoader ... );
\r
24 # by default myapp.* will be loaded
\r
25 # you can specify a file if you'd like
\r
26 __PACKAGE__->config( file => 'config.yaml' );
\r
30 This module will attempt to load find and load a configuration
\r
31 file of various types. Currently it supports YAML, JSON, XML,
\r
32 INI and Perl formats.
\r
34 To support the distinction between development and production environments,
\r
35 this module will also attemp to load a local config (e.g. myapp_local.yaml)
\r
36 which will override any duplicate settings.
\r
42 This method is automatically called by Catalyst's setup routine. It will
\r
43 attempt to use each plugin and, once a file has been successfully
\r
44 loaded, set the C<config()> section.
\r
50 my( $path, $extension ) = $c->get_config_path;
\r
52 my $finder = Module::Pluggable::Object->new(
\r
53 search_path => [ __PACKAGE__ ],
\r
57 for my $loader ( $finder->plugins ) {
\r
59 my @extensions = $loader->extensions;
\r
61 next unless grep { $_ eq $extension } @extensions;
\r
65 @files = map { ( "$path.$_", "${path}_local.$_" ) } @extensions;
\r
70 my $config = $loader->load( $_ );
\r
72 $c->log->debug( qq(Loaded Config "$_") ) if $c->debug;
\r
76 _fix_syntax( $config );
\r
78 $c->config( $config );
\r
82 $c->finalize_config;
\r
84 $c->NEXT::setup( @_ );
\r
87 =head2 finalize_config
\r
89 This method is called after the config file is loaded. It can be
\r
90 used to implement tuning of config values that can only be done
\r
91 at runtime. If you need to do this to properly configure any
\r
92 plugins, it's important to load ConfigLoader before them.
\r
93 ConfigLoader provides a default finalize_config method which
\r
94 walks through the loaded config hash and replaces any strings
\r
95 beginning containing C<__HOME__> with the full path to
\r
96 app's home directory (i.e. C<$c-E<gt>path_to('')> ).
\r
97 You can also use C<__path_to('foo/bar')__> which translates to
\r
98 C<$c-E<gt>path_to('foo', 'bar')>
\r
102 sub finalize_config {
\r
104 my $v = Data::Visitor::Callback->new(
\r
105 plain_value => sub {
\r
106 return unless defined $_;
\r
107 s{__HOME__}{ $c->path_to( '' ) }e;
\r
108 s{__path_to\((.+)\)__}{ $c->path_to( split( '/', $1 ) ) }e;
\r
111 $v->visit( $c->config );
\r
114 =head2 get_config_path
\r
116 This method determines the path, filename prefix and file extension to be used
\r
117 for config loading. It returns the path (up to the filename less the
\r
118 extension) to check and the specific extension to use (if it was specified).
\r
120 The order of preference is specified as:
\r
124 =item * C<$ENV{ MYAPP_CONFIG }>
\r
126 =item * C<$c->config->{ file }>
\r
128 =item * C<$c->path_to( $application_prefix )>
\r
132 If either of the first two user-specified options are directories, the
\r
133 application prefix will be added on to the end of the path.
\r
137 sub get_config_path {
\r
139 my $appname = ref $c || $c;
\r
140 my $prefix = Catalyst::Utils::appprefix( $appname );
\r
141 my $path = $ENV{ Catalyst::Utils::class2env( $appname ) . '_CONFIG' }
\r
142 || $c->config->{ file }
\r
143 || $c->path_to( $prefix );
\r
145 my( $extension ) = ( $path =~ m{\.(.{1,4})$} );
\r
148 $path =~ s{[\/\\]$}{};
\r
149 $path .= "/$prefix";
\r
152 return( $path, $extension );
\r
156 my $config = shift;
\r
159 prefix => $_ eq 'Component' ? '' : $_ . '::',
\r
160 values => delete $config->{ lc $_ } || delete $config->{ $_ }
\r
163 ref $config->{ lc $_ } || ref $config->{ $_ }
\r
165 qw( Component Model M View V Controller C )
\r
168 foreach my $comp ( @components ) {
\r
169 my $prefix = $comp->{ prefix };
\r
170 foreach my $element ( keys %{ $comp->{ values } } ) {
\r
171 $config->{ "$prefix$element" } = $comp->{ values }->{ $element };
\r
180 =item * Brian Cassidy E<lt>bricas@cpan.orgE<gt>
\r
184 =head1 CONTRIBUTORS
\r
186 The following people have generously donated their time to the
\r
187 development of this module:
\r
191 =item * David Kamholz E<lt>dkamholz@cpan.orgE<gt>
\r
195 =head1 COPYRIGHT AND LICENSE
\r
197 Copyright 2006 by Brian Cassidy
\r
199 This library is free software; you can redistribute it and/or modify
\r
200 it under the same terms as Perl itself.
\r
206 =item * L<Catalyst>
\r