Core extension library
Check for an existing method in the current class before extending. IF the method already exists, then a warning is printed and the extension is not added. Otherwise the block is yielded and any definitions in the block will take effect.
Usage:
class String rake_extension("xyz") do def xyz ... end end end
# File lib/rake/ext/core.rb, line 20 def rake_extension(method) if method_defined?(method) $stderr.puts "WARNING: Possible conflict with Rake extension: #{self}##{method} already exists" else yield end end
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