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[ruby/psych] Remove unnecessary version guard from versions.rb

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Removing it triggers the following warnings when running `bundle` under
jruby from the root of the `psych` repo prints the following warnings:

```
/path/to/jruby-9.2.9.0/lib/ruby/gems/shared/gems/psych-3.1.0-java/lib/psych/versions.rb:7: warning: already initialized constant VERSION
/path/to//jruby-9.2.9.0/lib/ruby/gems/shared/gems/psych-3.1.0-java/lib/psych/versions.rb:10: warning: already initialized constant DEFAULT_SNAKEYAML_VERSION
```

This is because bundler loads the versions file relatively from the
local gemspec, and then internally loads the psych gem, causing the
redefinition warnings.

Instead, we modify the $LOAD_PATH so that when working locally on the
`psych` repo, the local version of `psych` gets used.

https://github.com/ruby/psych/commit/a3fc8191a7
This commit is contained in:
David Rodríguez 2020-02-14 00:26:37 +01:00 committed by Nobuyoshi Nakada
parent f245976386
commit cd3d035e8a
Notes: git 2020-06-05 11:50:25 +09:00 
Merged: https://github.com/ruby/ruby/pull/3188
2 changed files with 5 additions and 7 deletions
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2
ext/psych/lib/psych/versions.rb
View file

@ -2,7 +2,7 @@
# frozen_string_literal: true
module Psych
# The version of Psych you are using
VERSION = '3.1.0' unless defined?(::Psych::VERSION)
VERSION = '3.1.0'
if RUBY_ENGINE == 'jruby'
DEFAULT_SNAKEYAML_VERSION = '1.23'.freeze

10
ext/psych/psych.gemspec
View file

@ -1,12 +1,10 @@
# -*- encoding: utf-8 -*-
# frozen_string_literal: true
begin
require_relative 'lib/psych/versions'
rescue LoadError
# for Ruby core repository
require_relative 'versions'
end
lib_path = File.expand_path('lib', __dir__)
$LOAD_PATH.unshift lib_path if File.exist?(lib_path)
require 'psych/versions'
Gem::Specification.new do |s|
s.name = "psych"