27 lines
668 B
Ruby
27 lines
668 B
Ruby
# frozen_string_literal: true
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class Module
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# Check for an existing method in the current class before extending. If
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# the method already exists, then a warning is printed and the extension is
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# not added. Otherwise the block is yielded and any definitions in the
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# block will take effect.
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#
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# Usage:
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#
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# class String
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# rake_extension("xyz") do
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# def xyz
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# ...
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# end
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# end
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# end
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#
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def rake_extension(method) # :nodoc:
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if method_defined?(method)
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$stderr.puts "WARNING: Possible conflict with Rake extension: " +
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"#{self}##{method} already exists"
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else
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yield
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end
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end
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end
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