Manpages - CPAN_Meta_Merge.3perl
Table of Contents
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_additionstrategy, Hash refs will try to use theuniq_mapstrategy, and everything else will try theidenticalstrategy.
AUTHORS
- David Golden <dagolden@cpan.org>
- Ricardo Signes <rjbs@cpan.org>
- Adam Kennedy <adamk@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.