10 Jan 2021 00:52:16 UTC
- Distribution: Config-MVP
- Module version: 2.200012
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Config::MVP::Reader - object to read config from storage into an assembler
use Config::MVP::Reader::YAML; # this doesn't really exist my $reader = Config::MVP::Reader::YAML->new; my $sequence = $reader->read_config('/etc/foobar.yml');
A Config::MVP::Reader exists to read configuration data from storage (like a file) and convert that data into instructions to a Config::MVP::Assembler, which will in turn convert them into a Config::MVP::Sequence, the final product.
If true (which it is by default) then the current working directly will be locally added to
@INCduring config loading. This helps deal with changes made in Perl v5.26.1.
my $sequence = $reader->read_config($location, \%arg);
This method is passed a location, which has no set meaning, but should be the mechanism by which the Reader is told how to locate configuration. It might be a file name, a hashref of parameters, a DBH, or anything else, depending on the needs of the specific Reader subclass.
It is also passed a hashref of arguments, of which there is only one valid argument:
assembler - the Assembler object into which to read the config
If no assembler argument is passed, one will be constructed by calling the Reader's
Subclasses should generally not override
read_config, but should instead implement a
read_into_assemblermethod, described below. If a subclass does override
read_configit should take care to respect the
This method should not be called directly. It is called by
read_configwith the following parameters:
my $sequence = $reader->read_into_assembler( $location, $assembler );
The method should read the configuration found at
$locationand use it to instruct the
$assembler(a Config::MVP::Assembler) what configuration to perform.
The default implementation of this method will throw an exception complaining that it should have been implemented by a subclass.
If no Assembler is provided to
assemblerparameter, this method will be called on the Reader to construct one.
It must return a Config::MVP::Assembler object, and by default will return an entirely generic one.
Ricardo Signes <firstname.lastname@example.org>
This software is copyright (c) 2021 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.