| CPAN::Meta::Merge(3pm) - phpMan
CPAN::Meta::Merge(3pm) User Contributed Perl Documentation CPAN::Meta::Merge(3pm)
NAME
CPAN::Meta::Merge - Merging CPAN Meta fragments
VERSION
version 2.150010
SYNOPSIS
my $merger = CPAN::Meta::Merge->new(default_version => "2");
my $meta = $merger->merge($base, @additional);
DESCRIPTION
METHODS
new
This creates a CPAN::Meta::Merge object. It takes one mandatory named argument, "version",
declaring the version of the meta-spec that must be used for the merge. It can optionally
take an "extra_mappings" argument that allows one to add additional merging functions for
specific elements.
The "extra_mappings" arguments takes a hash ref with the same type of structure as
described in CPAN::Meta::Spec, except with its values as one of the defined merge
strategies or a code ref to a merging function.
my $merger = CPAN::Meta::Merge->new(
default_version => '2',
extra_mappings => {
'optional_features' => \&custom_merge_function,
'x_custom' => 'set_addition',
'x_meta_meta' => {
name => 'identical',
tags => 'set_addition',
}
}
);
merge(@fragments)
Merge all @fragments together. It will accept both CPAN::Meta objects and (possibly
incomplete) hashrefs of metadata.
MERGE STRATEGIES
"merge" uses various strategies to combine different elements of the CPAN::Meta objects.
The following strategies can be used with the extra_mappings argument of "new":
identical
The elements must be identical
set_addition
The union of two array refs
[ a, b ] U [ a, c] = [ a, b, c ]
uniq_map
Key value pairs from the right hash are merged to the left hash. Key collisions are
only allowed if their values are the same. This merge function will recurse into
nested hash refs following the same merge rules.
improvise
This merge strategy will try to pick the appropriate predefined strategy based on what
element type. Array refs will try to use the "set_addition" strategy, Hash refs will
try to use the "uniq_map" strategy, and everything else will try the "identical"
strategy.
AUTHORS
· David Golden <dagolden AT cpan.org>
· Ricardo Signes <rjbs AT cpan.org>
· Adam Kennedy <adamk AT cpan.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2010 by David Golden, Ricardo Signes, Adam Kennedy and
Contributors.
This is free software; you can redistribute it and/or modify it under the same terms as
the Perl 5 programming language system itself.
perl v5.20.2 2016-08-18 CPAN::Meta::Merge(3pm)
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