Method: Kernel#__main__

Defined in:
lib/mug/main.rb

#__main__ ⇒ Object

Compares the calling source filename with ‘$PROGRAM_NAME` (`$0`).

Returns a falsey value if the calling context is not in the ‘main’ file.

If called without a block, and the calling context is in the ‘main’ file, returns true.

If called with a block, and the calling context is in the ‘main’ file, the block is executed and the result is returned.



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# File 'lib/mug/main.rb', line 15

def __main__
  cloc = caller_locations(1, 1)[0]
  return if cloc.nil?
  return unless File.absolute_path($0) == cloc.absolute_path
  block_given? ? (yield) : true
end