зеркало из https://github.com/github/ruby.git
78 строки
2.1 KiB
Ruby
78 строки
2.1 KiB
Ruby
# frozen_string_literal: true
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# :stopdoc:
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# Hack to handle syck's DefaultKey bug
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#
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# This file is always loaded AFTER either syck or psych are already
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# loaded. It then looks at what constants are available and creates
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# a consistent view on all rubys.
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#
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# All this is so that there is always a YAML::Syck::DefaultKey
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# class no matter if the full yaml library has loaded or not.
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#
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module YAML # :nodoc:
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# In newer 1.9.2, there is a Syck toplevel constant instead of it
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# being underneath YAML. If so, reference it back under YAML as
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# well.
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if defined? ::Syck
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# for tests that change YAML::ENGINE
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# 1.8 does not support the second argument to const_defined?
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remove_const :Syck rescue nil
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Syck = ::Syck
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# JRuby's "Syck" is called "Yecht"
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elsif defined? YAML::Yecht
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Syck = YAML::Yecht
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# Otherwise, if there is no YAML::Syck, then we've got just psych
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# loaded, so lets define a stub for DefaultKey.
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elsif !defined? YAML::Syck
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module Syck
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class DefaultKey # :nodoc:
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end
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end
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end
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# Now that we've got something that is always here, define #to_s
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# so when code tries to use this, it at least just shows up like it
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# should.
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module Syck
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class DefaultKey
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remove_method :to_s rescue nil
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def to_s
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'='
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end
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end
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end
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SyntaxError = Error unless defined? SyntaxError
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end
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# Sometime in the 1.9 dev cycle, the Syck constant was moved from under YAML
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# to be a toplevel constant. So gemspecs created under these versions of Syck
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# will have references to Syck::DefaultKey.
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#
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# So we need to be sure that we reference Syck at the toplevel too so that
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# we can always load these kind of gemspecs.
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#
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if !defined?(Syck)
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Syck = YAML::Syck
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end
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# Now that we've got Syck setup in all the right places, store
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# a reference to the DefaultKey class inside Gem. We do this so that
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# if later on YAML, etc are redefined, we've still got a consistent
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# place to find the DefaultKey class for comparison.
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module Gem
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# for tests that change YAML::ENGINE
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remove_const :SyckDefaultKey if const_defined? :SyckDefaultKey
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SyckDefaultKey = YAML::Syck::DefaultKey
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end
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# :startdoc:
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