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Diffstat (limited to 'jni/ruby/lib/rake/ext/core.rb')
-rw-r--r-- | jni/ruby/lib/rake/ext/core.rb | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/jni/ruby/lib/rake/ext/core.rb b/jni/ruby/lib/rake/ext/core.rb new file mode 100644 index 0000000..7575df1 --- /dev/null +++ b/jni/ruby/lib/rake/ext/core.rb @@ -0,0 +1,25 @@ +class Module + # 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 + # + def rake_extension(method) # :nodoc: + if method_defined?(method) + $stderr.puts "WARNING: Possible conflict with Rake extension: " + + "#{self}##{method} already exists" + else + yield + end + end +end |