Edit File: CPAN::Meta::Merge.3pm
.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is turned on, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{ . if \nF \{ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" ======================================================================== .\" .IX Title "CPAN::Meta::Merge 3" .TH CPAN::Meta::Merge 3 "2016-08-18" "perl v5.16.3" "User Contributed Perl Documentation" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" CPAN::Meta::Merge \- Merging CPAN Meta fragments .SH "VERSION" .IX Header "VERSION" version 2.150010 .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 2 \& my $merger = CPAN::Meta::Merge\->new(default_version => "2"); \& my $meta = $merger\->merge($base, @additional); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" .SH "METHODS" .IX Header "METHODS" .SS "new" .IX Subsection "new" This creates a CPAN::Meta::Merge object. It takes one mandatory named argument, \f(CW\*(C`version\*(C'\fR, declaring the version of the meta-spec that must be used for the merge. It can optionally take an \f(CW\*(C`extra_mappings\*(C'\fR argument that allows one to add additional merging functions for specific elements. .PP The \f(CW\*(C`extra_mappings\*(C'\fR 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. .PP .Vb 11 \& my $merger = CPAN::Meta::Merge\->new( \& default_version => \*(Aq2\*(Aq, \& extra_mappings => { \& \*(Aqoptional_features\*(Aq => \e&custom_merge_function, \& \*(Aqx_custom\*(Aq => \*(Aqset_addition\*(Aq, \& \*(Aqx_meta_meta\*(Aq => { \& name => \*(Aqidentical\*(Aq, \& tags => \*(Aqset_addition\*(Aq, \& } \& } \& ); .Ve .SS "merge(@fragments)" .IX Subsection "merge(@fragments)" Merge all \f(CW@fragments\fR together. It will accept both CPAN::Meta objects and (possibly incomplete) hashrefs of metadata. .SH "MERGE STRATEGIES" .IX Header "MERGE STRATEGIES" \&\f(CW\*(C`merge\*(C'\fR uses various strategies to combine different elements of the CPAN::Meta objects. The following strategies can be used with the extra_mappings argument of \f(CW\*(C`new\*(C'\fR: .IP "identical" 4 .IX Item "identical" The elements must be identical .IP "set_addition" 4 .IX Item "set_addition" The union of two array refs .Sp .Vb 1 \& [ a, b ] U [ a, c] = [ a, b, c ] .Ve .IP "uniq_map" 4 .IX Item "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. .IP "improvise" 4 .IX Item "improvise" This merge strategy will try to pick the appropriate predefined strategy based on what element type. Array refs will try to use the \&\f(CW\*(C`set_addition\*(C'\fR strategy, Hash refs will try to use the \f(CW\*(C`uniq_map\*(C'\fR strategy, and everything else will try the \f(CW\*(C`identical\*(C'\fR strategy. .SH "AUTHORS" .IX Header "AUTHORS" .IP "\(bu" 4 David Golden <dagolden@cpan.org> .IP "\(bu" 4 Ricardo Signes <rjbs@cpan.org> .IP "\(bu" 4 Adam Kennedy <adamk@cpan.org> .SH "COPYRIGHT AND LICENSE" .IX Header "COPYRIGHT AND LICENSE" This software is copyright (c) 2010 by David Golden, Ricardo Signes, Adam Kennedy and Contributors. .PP This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.