Catalyst::Plugin::ConfigLoader(3pm)

1Catalyst::Plugin::ConfiUgsLeoradCeorn(t3r)ibuted Perl DoCcautmaelnytsatt:i:oPnlugin::ConfigLoader(3)
2
3
4

NAME

6       Catalyst::Plugin::ConfigLoader - Load config files of various types
7

SYNOPSIS

9           package MyApp;
10
11           # ConfigLoader should be first in your list so
12           # other plugins can get the config information
13           use Catalyst qw( ConfigLoader ... );
14
15           # by default myapp.* will be loaded
16           # you can specify a file if you'd like
17           __PACKAGE__->config( 'Plugin::ConfigLoader' => { file => 'config.yaml' } );
18
19       In the file, assuming it's in YAML format:
20
21           foo: bar
22
23       Accessible through the context object, or the class itself
24
25           $c->config->{foo}    # bar
26           MyApp->config->{foo} # bar
27

DESCRIPTION

29       This module will attempt to load find and load a configuration file of
30       various types. Currently it supports YAML, JSON, XML, INI and Perl
31       formats. Special configuration for a particular driver format can be
32       stored in "MyApp->config->{ 'Plugin::ConfigLoader' }->{ driver }".  For
33       example, to pass arguments to Config::General, use the following:
34
35           __PACKAGE__->config( 'Plugin::ConfigLoader' => {
36               driver => {
37                   'General' => { -LowerCaseNames => 1 }
38               }
39           } );
40
41       See Config::Any's "driver_args" parameter for more information.
42
43       To support the distinction between development and production
44       environments, this module will also attemp to load a local config (e.g.
45       myapp_local.yaml) which will override any duplicate settings.  See
46       "get_config_local_suffix" for details on how this is configured.
47

METHODS

49   setup( )
50       This method is automatically called by Catalyst's setup routine. It
51       will attempt to use each plugin and, once a file has been successfully
52       loaded, set the config() section.
53
54   load_config
55       This method handles loading the configuration data into the Catalyst
56       context object. It does not return a value.
57
58   find_files
59       This method determines the potential file paths to be used for config
60       loading.  It returns an array of paths (up to the filename less the
61       extension) to pass to Config::Any for loading.
62
63   get_config_path
64       This method determines the path, filename prefix and file extension to
65       be used for config loading. It returns the path (up to the filename
66       less the extension) to check and the specific extension to use (if it
67       was specified).
68
69       The order of preference is specified as:
70
71       •   $ENV{ MYAPP_CONFIG }
72
73       •   $ENV{ CATALYST_CONFIG }
74
75       •   "$c->config->{ 'Plugin::ConfigLoader' }->{ file }"
76
77       •   "$c->path_to( $application_prefix )"
78
79       If either of the first two user-specified options are directories, the
80       application prefix will be added on to the end of the path.
81
82   get_config_local_suffix
83       Determines the suffix of files used to override the main config. By
84       default this value is "local", which will load "myapp_local.conf".  The
85       suffix can be specified in the following order of preference:
86
87       •   $ENV{ MYAPP_CONFIG_LOCAL_SUFFIX }
88
89       •   $ENV{ CATALYST_CONFIG_LOCAL_SUFFIX }
90
91       •   "$c->config->{ 'Plugin::ConfigLoader' }->{ config_local_suffix }"
92
93       The first one of these values found replaces the default of "local" in
94       the name of the local config file to be loaded.
95
96       For example, if  $ENV{ MYAPP_CONFIG_LOCAL_SUFFIX } is set to "testing",
97       ConfigLoader will try and load myapp_testing.conf instead of
98       myapp_local.conf.
99
100   finalize_config
101       This method is called after the config file is loaded. It can be used
102       to implement tuning of config values that can only be done at runtime.
103       If you need to do this to properly configure any plugins, it's
104       important to load ConfigLoader before them.  ConfigLoader provides a
105       default "finalize_config" method which walks through the loaded config
106       hash and calls the config_substitutions method on any string.
107
108   config_substitutions( $value )
109       This method substitutes macros found with calls to a function. There
110       are a number of default macros:
111
112       •   "__HOME__" - replaced with "$c->path_to('')"
113
114       •   "__ENV(foo)__" - replaced with the value of $ENV{foo}
115
116       •   "__path_to(foo/bar)__" - replaced with "$c->path_to('foo/bar')"
117
118       •   "__literal(__FOO__)__" - leaves __FOO__ alone (allows you to use
119           "__DATA__" as a config value, for example)
120
121       The parameter list is split on comma (","). You can override this
122       method to do your own string munging, or you can define your own macros
123       in "MyApp->config->{ 'Plugin::ConfigLoader' }->{ substitutions }".
124       Example:
125
126           MyApp->config->{ 'Plugin::ConfigLoader' }->{ substitutions } = {
127               baz => sub { my $c = shift; qux( @_ ); }
128           }
129
130       The above will respond to "__baz(x,y)__" in config strings.
131

AUTHOR

133       Brian Cassidy <bricas@cpan.org>
134

CONTRIBUTORS

136       The following people have generously donated their time to the
137       development of this module:
138
139       •   Joel Bernstein <rataxis@cpan.org> - Rewrite to use Config::Any
140
141       •   David Kamholz <dkamholz@cpan.org> - Data::Visitor integration
142
143       •   Stuart Watt - Addition of ENV macro.
144
145       Work to this module has been generously sponsored by:
146
147       •   Portugal Telecom <http://www.sapo.pt/> - Work done by Joel
148           Bernstein
149

COPYRIGHT AND LICENSE

151       Copyright 2006-2010 by Brian Cassidy
152
153       This library is free software; you can redistribute it and/or modify it
154       under the same terms as Perl itself.
155