1Config::MVP::Reader(3)User Contributed Perl DocumentationConfig::MVP::Reader(3)
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NAME

6       Config::MVP::Reader - object to read config from storage into an
7       assembler
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VERSION

10       version 2.200013
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SYNOPSIS

13         use Config::MVP::Reader::YAML; # this doesn't really exist
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15         my $reader   = Config::MVP::Reader::YAML->new;
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17         my $sequence = $reader->read_config('/etc/foobar.yml');
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DESCRIPTION

20       A Config::MVP::Reader exists to read configuration data from storage
21       (like a file) and convert that data into instructions to a
22       Config::MVP::Assembler, which will in turn convert them into a
23       Config::MVP::Sequence, the final product.
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PERL VERSION

26       This module should work on any version of perl still receiving updates
27       from the Perl 5 Porters.  This means it should work on any version of
28       perl released in the last two to three years.  (That is, if the most
29       recently released version is v5.40, then this module should work on
30       both v5.40 and v5.38.)
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32       Although it may work on older versions of perl, no guarantee is made
33       that the minimum required version will not be increased.  The version
34       may be increased for any reason, and there is no promise that patches
35       will be accepted to lower the minimum required perl.
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ATTRIBUTES

38   add_cwd_to_lib
39       If true (which it is by default) then the current working directly will
40       be locally added to @INC during config loading.  This helps deal with
41       changes made in Perl v5.26.1.
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METHODS

44   read_config
45         my $sequence = $reader->read_config($location, \%arg);
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47       This method is passed a location, which has no set meaning, but should
48       be the mechanism by which the Reader is told how to locate
49       configuration.  It might be a file name, a hashref of parameters, a
50       DBH, or anything else, depending on the needs of the specific Reader
51       subclass.
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53       It is also passed a hashref of arguments, of which there is only one
54       valid argument:
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56        assembler - the Assembler object into which to read the config
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58       If no assembler argument is passed, one will be constructed by calling
59       the Reader's "build_assembler" method.
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61       Subclasses should generally not override "read_config", but should
62       instead implement a "read_into_assembler" method, described below.  If
63       a subclass does override "read_config" it should take care to respect
64       the "add_cwd_to_lib" attribute, above.
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66   read_into_assembler
67       This method should not be called directly.  It is called by
68       "read_config" with the following parameters:
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70         my $sequence = $reader->read_into_assembler( $location, $assembler );
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72       The method should read the configuration found at $location and use it
73       to instruct the $assembler (a Config::MVP::Assembler) what
74       configuration to perform.
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76       The default implementation of this method will throw an exception
77       complaining that it should have been implemented by a subclass.
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79   build_assembler
80       If no Assembler is provided to "read_config"'s "assembler" parameter,
81       this method will be called on the Reader to construct one.
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83       It must return a Config::MVP::Assembler object, and by default will
84       return an entirely generic one.
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AUTHOR

87       Ricardo Signes <cpan@semiotic.systems>
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90       This software is copyright (c) 2022 by Ricardo Signes.
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92       This is free software; you can redistribute it and/or modify it under
93       the same terms as the Perl 5 programming language system itself.
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97perl v5.36.0                      2023-01-20            Config::MVP::Reader(3)
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