NAME

Bundler::MultiGem::Model::Gem - The utility to install multiple versions of the same ruby gem

VERSION

Version 0.02

SYNOPSIS

This module contains utility functions for manipulating gems

SUBROUTINES

new

Takes an hash reference parameter. You should provide: * name: string, gem name in repository * main_module: string, gem main module name * source: string, e.g. "https://rubygems.org" * versions: array ref of strings, e.g. [qw( 0.0.5 0.1.0 )]

    my $config = {
      name => "jsonschema_serializer",
      main_module => "JsonschemaSerializer",
      source => "https://rubygems.org",
      versions => [qw( 0.0.5 0.1.0 )]
    };
    my $gem = Bundler::MultiGem::Model::Gem->new($config);

config config getter

name

name getter

    $gem->name; # "jsonschema_serializer"

source

source getter

    $gem->source; # "https://rubygems.org"

main_module

main_module getter

    $gem->main_module; # "JsonschemaSerializer"

versions

versions getter

    $gem->versions; # [qw( 0.0.5 0.1.0 )]

vname

vname getter: combine gem name and version and format it * v: string, a gem version reference

    $gem->name; # "jsonschema_serializer"
    my $v = "0.0.5";
    $gem->vname($v); # "v005-jsonschema_serializer"

vmodule_name

vmodule_name getter: combine gem name and version and format it * v: string, a gem version reference

    $gem->main_module; # "JsonschemaSerializer"
    my $v = "0.0.5";
    $gem->vmodule_name($v); # "V005::JsonschemaSerializer"

apply

This function apply all the transformation to the gem versions to be reused in the same Gemfile: dir, a Bundler::MultiGem::Model::Directories instance

For each gem version it will: * fetch the gem version * extract it into a target directory * process_gemfile * rename_main_file * rename the lib directory including the version name * for each rb, rake and Rakefile apply process_single_file

Caveats: * if you are renaming foo-bar to V123::Foo::Bar, also partial matches will be renamed: e.g. foo-bar_baz * this is intended for benchmarking simple gems, it may break with very complex gems * the use case leading this development was benchmarking serialization gems performance

process_gemfile

Manipulates original gemfile as follows: * rename foo.gemspec for v 0.1.0 into v010-foo.gemspec * remove line importing gem version (usually require_relative 'lib/foo/version') * replace main_module version with the actual version (Foo::VERSION with '0.1.0') * replace gem name reference with gem vname (foo with v010-foo) * replace gem main_module reference with gem vmodule_name (Foo with V010::Foo) * unlink the original foo.gemspec

rename_main_file

Manipulates original gemfile as follows: * rename lib/foo.rb for v 0.1.0 into lib/v010-foo.rb * add on top of lib/v010-foo.rb: module V010; end for namespacing * copy the rest of original below

This step allows to add a namespace with the gem version (a kind of shading). All the other replacement are done with other rb, rake and Rakfile files.

process_single_file

Manipulates each file as follows: * create a backup of the original file .bak * replace gem name reference with gem vname (foo with v010-foo) * replace gem main_module reference with gem vmodule_name (Foo with V010::Foo) * unlink the backup .bak

fetch

This is an alias of the system command gem fetch

    my $gem->name; # "foo"
    my $fp = "pkg/v010-foo.gem"
    my $gv = "0.1.0";
    $gem->fetch($fp, $gv); # if $fp found, do nothing, else fetch gem version and rename it

EXPORTS

gem_vname

Reusable function to combine and format gem name and version

    use Bundler::MultiGem::Model::Gem qw(gem_vname);
    gem_vname("foo", "0.1.0"); # v010-foo
    gem_vname("foo_bar", "0.1.0"); # v010-foo_bar
    gem_vname("foo-bar", "0.1.0"); # v010-foo-bar

gem_vmodule_name

Reusable function to combine and format gem main module and version

    use Bundler::MultiGem::Model::Gem qw(gem_vmodule_name);
    gem_vname("Foo", "0.1.0"); # V010::Foo
    gem_vname("FooBar", "0.1.0"); # V010::FooBar
    gem_vname("Foo::Bar", "0.1.0"); # V010::Foo::Bar

norm_v

Utility function to normalize version name

    use Bundler::MultiGem::Model::Gem qw(norm_v);
    norm_v("123"); #v123
    norm_v("1.23"); #v123
    norm_v("12.3"); #v123
    norm_v("1.2.3"); #v123

unpack_gem

This is an alias of the system command gem unpack

AUTHOR

Mauro Berlanda, <kupta at cpan.org>

BUGS

Please report any bugs or feature requests to https://github.com/mberlanda/Bundler-MultiGem/issues, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=.. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc Bundler::MultiGem::Directories

You can also look for information at:

ACKNOWLEDGEMENTS

LICENSE AND COPYRIGHT

Copyright 2018 Mauro Berlanda.

This program is free software; you can redistribute it and/or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at:

http://www.perlfoundation.org/artistic_license_2_0

Any use, modification, and distribution of the Standard or Modified Versions is governed by this Artistic License. By using, modifying or distributing the Package, you accept this license. Do not use, modify, or distribute the Package, if you do not accept this license.

If your Modified Version has been derived from a Modified Version made by someone other than you, you are nevertheless required to ensure that your Modified Version complies with the requirements of this license.

This license does not grant you the right to use any trademark, service mark, tradename, or logo of the Copyright Holder.

This license includes the non-exclusive, worldwide, free-of-charge patent license to make, have made, use, offer to sell, sell, import and otherwise transfer the Package with respect to any patent claims licensable by the Copyright Holder that are necessarily infringed by the Package. If you institute patent litigation (including a cross-claim or counterclaim) against any party alleging that the Package constitutes direct or contributory patent infringement, then this Artistic License to you shall terminate on the date that such litigation is filed.

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