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Config::JFDI - Just * Do it: A Catalyst::Plugin::ConfigLoader-style layer over Config::Any


version 0.065


Config::JFDI is an implementation of Catalyst::Plugin::ConfigLoader that exists outside of Catalyst.

Essentially, Config::JFDI will scan a directory for files matching a certain name. If such a file is found which also matches an extension that Config::Any can read, then the configuration from that file will be loaded.

Config::JFDI will also look for special files that end with a "_local" suffix. Files with this special suffix will take precedence over any other existing configuration file, if any. The precedence takes place by merging the local configuration with the "standard" configuration via Hash::Merge::Simple.

Finally, you can override/modify the path search from outside your application, by setting the <NAME>_CONFIG variable outside your application (where <NAME> is the uppercase version of what you passed to Config::JFDI->new).


    use Config::JFDI;

    my $config = Config::JFDI->new(name => "my_application", path => "path/to/my/application");
    my $config_hash = $config->get;

This will look for something like (depending on what Config::Any will find):

    path/to/my/application/my_application_local.{yml,yaml,cnf,conf,jsn,json,...} AND


... and load the found configuration information appropiately, with _local taking precedence.

You can also specify a file directly:

    my $config = Config::JFDI->new(file => "/path/to/my/application/my_application.cnf");

To later reload your configuration, fresh from disk:



We are currently kicking around ideas for a next-generation configuration loader. The goals are:

    * A universal platform for configuration slurping and post-processing
    * Use Config::Any to do configuration loading
    * A sane API so that developers can roll their own loader according to the needs of their application
    * A friendly interface so that users can have it just DWIM
    * Host/application/instance specific configuration via _local and %ENV

Find more information and contribute at:


Mailing list:

Behavior change of the 'file' parameter in 0.06

In previous versions, Config::JFDI would treat the file parameter as a path parameter, stripping off the extension (ignoring it) and globbing what remained against all the extensions that Config::Any could provide. That is, it would do this:

    Config::JFDI->new( file => 'xyzzy.cnf' );
    # Transform 'xyzzy.cnf' into '', 'xyzzy.yaml', '', ... (depending on what Config::Any could parse)

This is probably not what people intended. Config::JFDI will now squeak a warning if you pass 'file' through, but you can suppress the warning with 'no_06_warning' or 'quiet_deprecation'

    Config::JFDI->new( file => 'xyzzy.cnf', no_06_warning => 1 );
    Config::JFDI->new( file => 'xyzzy.cnf', quiet_deprecation => 1 ); # More general

If you *do* want the original behavior, simply pass in the file parameter as the path parameter instead:

    Config::JFDI->new( path => 'xyzzy.cnf' ); # Will work as before


$config = Config::JFDI->new(...)

You can configure the $config object by passing the following to new:

    name                The name specifying the prefix of the configuration file to look for and 
                        the ENV variable to read. This can be a package name. In any case,
                        :: will be substituted with _ in <name> and the result will be lowercased.

                        To prevent modification of <name>, pass it in as a scalar reference.

    path                The directory to search in

    file                Directly read the configuration from this file. Config::Any must recognize
                        the extension. Setting this will override path

    no_local            Disable lookup of a local configuration. The 'local_suffix' option will be ignored. Off by default

    local_suffix        The suffix to match when looking for a local configuration. "local" By default
                        ("config_local_suffix" will also work so as to be drop-in compatible with C::P::CL)

    no_env              Set this to 1 to disregard anything in the ENV. The 'env_lookup' option will be ignored. Off by default

    env_lookup          Additional ENV to check if $ENV{<NAME>...} is not found

    driver              A hash consisting of Config:: driver information. This is passed directly through
                        to Config::Any

    install_accessor    Set this to 1 to install a Catalyst-style accessor as <name>::config
                        You can also specify the package name directly by setting install_accessor to it 
                        (e.g. install_accessor => "My::Application")

    substitute          A hash consisting of subroutines called during the substitution phase of configuration
                        preparation. ("substitutions" will also work so as to be drop-in compatible with C::P::CL)
                        A substitution subroutine has the following signature: ($config, [ $argument1, $argument2, ... ])

    path_to             The path to dir to use for the __path_to(...)__ substitution. If nothing is given, then the 'home'
                        config value will be used ($config->get->{home}). Failing that, the current directory will be used.

    default             A hash filled with default keys/values

Returns a new Config::JFDI object

$config_hash = Config::JFDI->open( ... )

As an alternative way to load a config, ->open will pass given arguments to ->new( ... ), then attempt to do ->load

Unlike ->get or ->load, if no configuration files are found, ->open will return undef (or the empty list)

This is so you can do something like:

    my $config_hash = Config::JFDI->open( "/path/to/application.cnf" ) or croak "Couldn't find config file!"

In scalar context, ->open will return the config hash, NOT the config object. If you want the config object, call ->open in list context:

    my ($config_hash, $config) = Config::JFDI->open( ... )

You can pass any arguments to ->open that you would to ->new




Load a config as specified by ->new( ... ) and ENV and return a hash

These will only load the configuration once, so it's safe to call them multiple times without incurring any loading-time penalty


Returns a list of files found

If the list is empty, then no files were loaded/read


Return a clone of the configuration hash using Clone

This will load the configuration first, if it hasn't already


Reload the configuration, examining ENV and scanning the path anew

Returns a hash of the configuration

$config->substitute( <value>, <value>, ... )

For each given <value>, if <value> looks like a substitution specification, then run the substitution macro on <value> and store the result.

There are three default substitutions (the same as Catalyst::Plugin::ConfigLoader)

  • __HOME__ - replaced with $c->path_to('')

  • __path_to(foo/bar)__ - replaced with $c->path_to('foo/bar')

  • __literal(__FOO__)__ - leaves __FOO__ alone (allows you to use __DATA__ as a config value, for example)

The parameter list is split on comma (,).

You can define your own substitutions by supplying the substitute option to ->new








Robert Krimen <>


This software is copyright (c) 2011 by Robert Krimen.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.