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package Mojolicious::Plugin::Config;
use Mojo::Base 'Mojolicious::Plugin';
use File::Spec::Functions 'file_name_is_absolute';
use Mojo::Util qw(decode slurp);
sub load {
my ($self, $file, $conf, $app) = @_;
$app->log->debug(qq{Reading configuration file "$file".});
return $self->parse(decode('UTF-8', slurp $file), $file, $conf, $app);
}
sub parse {
my ($self, $content, $file, $conf, $app) = @_;
# Run Perl code
my $config
= eval 'package Mojolicious::Plugin::Config::Sandbox; no warnings;'
. "sub app; local *app = sub { \$app }; use Mojo::Base -strict; $content";
die qq{Can't load configuration from file "$file": $@} if !$config && $@;
die qq{Configuration file "$file" did not return a hash reference.\n}
unless ref $config eq 'HASH';
return $config;
}
sub register {
my ($self, $app, $conf) = @_;
# Config file
my $file = $conf->{file} || $ENV{MOJO_CONFIG};
$file ||= $app->moniker . '.' . ($conf->{ext} || 'conf');
# Mode specific config file
my $mode = $file =~ /^(.*)\.([^.]+)$/ ? join('.', $1, $app->mode, $2) : '';
my $home = $app->home;
$file = $home->rel_file($file) unless file_name_is_absolute $file;
$mode = $home->rel_file($mode) if $mode && !file_name_is_absolute $mode;
$mode = undef unless $mode && -e $mode;
# Read config file
my $config = {};
if (-e $file) { $config = $self->load($file, $conf, $app) }
# Check for default and mode specific config file
elsif (!$conf->{default} && !$mode) {
die qq{Configuration file "$file" missing, maybe you need to create it?\n};
}
# Merge everything
$config = {%$config, %{$self->load($mode, $conf, $app)}} if $mode;
$config = {%{$conf->{default}}, %$config} if $conf->{default};
return $app->defaults(config => $app->config)->config($config)->config;
}
1;
=encoding utf8
=head1 NAME
Mojolicious::Plugin::Config - Perl-ish configuration plugin
=head1 SYNOPSIS
# myapp.conf (it's just Perl returning a hash)
{
foo => "bar",
music_dir => app->home->rel_dir('music')
};
# Mojolicious
my $config = $self->plugin('Config');
say $config->{foo};
# Mojolicious::Lite
my $config = plugin 'Config';
say $config->{foo};
# foo.html.ep
%= $config->{foo}
# The configuration is available application wide
my $config = app->config;
say $config->{foo};
# Everything can be customized with options
my $config = plugin Config => {file => '/etc/myapp.stuff'};
=head1 DESCRIPTION
L<Mojolicious::Plugin::Config> is a Perl-ish configuration plugin.
The application object can be accessed via C<$app> or the C<app> function,
L<strict>, L<warnings>, L<utf8> and Perl 5.10 features are automatically
enabled. You can extend the normal configuration file C<$moniker.conf> with
C<mode> specific ones like C<$moniker.$mode.conf>. A default configuration
filename will be generated from the value of L<Mojolicious/"moniker">.
The code of this plugin is a good example for learning to build new plugins,
you're welcome to fork it.
See L<Mojolicious::Plugins/"PLUGINS"> for a list of plugins that are available
by default.
=head1 OPTIONS
L<Mojolicious::Plugin::Config> supports the following options.
=head2 default
# Mojolicious::Lite
plugin Config => {default => {foo => 'bar'}};
Default configuration, making configuration files optional.
=head2 ext
# Mojolicious::Lite
plugin Config => {ext => 'stuff'};
File extension for generated configuration filenames, defaults to C<conf>.
=head2 file
# Mojolicious::Lite
plugin Config => {file => 'myapp.conf'};
plugin Config => {file => '/etc/foo.stuff'};
Full path to configuration file, defaults to the value of the C<MOJO_CONFIG>
environment variable or C<$moniker.conf> in the application home directory.
=head1 METHODS
L<Mojolicious::Plugin::Config> inherits all methods from
L<Mojolicious::Plugin> and implements the following new ones.
=head2 load
$plugin->load($file, $conf, $app);
Loads configuration file and passes the content to L</"parse">.
sub load {
my ($self, $file, $conf, $app) = @_;
...
return $self->parse($content, $file, $conf, $app);
}
=head2 parse
$plugin->parse($content, $file, $conf, $app);
Parse configuration file.
sub parse {
my ($self, $content, $file, $conf, $app) = @_;
...
return $hash;
}
=head2 register
my $config = $plugin->register(Mojolicious->new);
my $config = $plugin->register(Mojolicious->new, {file => '/etc/app.conf'});
Register plugin in L<Mojolicious> application and merge configuration.
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.
=cut
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