Class: Chunker::DataParser

Inherits:
Object
  • Object
show all
Defined in:
lib/chunker.rb

Overview

Parser class for __END__ data blocks. Find each __TOKEN__ within the __END__, and put each into a DATA_TOKEN constant within the namespace that included us.

Constant Summary collapse

END_TOKEN =

The mark for a DATA block.

/^__END__\r?\n/
CHUNK_TOKEN =

The mark for a ‘sub’ block.

/^__([A-Z\_0-9]+)__\r?\n/

Instance Method Summary collapse

Constructor Details

#initialize(klass, io) ⇒ DataParser

Constructor: Given a klass and an io to the class file, extract the data blocks and install constants.



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# File 'lib/chunker.rb', line 50

def initialize( klass, io )
	io.open if io.closed?
	end_string = io.read.split( END_TOKEN, 2 ).last

	@klass   = klass
	@scanner = StringScanner.new( end_string )
	io.close

	# put each chunk into its own constant
	#
	if @scanner.check_until( CHUNK_TOKEN )
		self.extract_blocks

	# no sub blocks, put the whole mess into DATA_END
	#
	else
		@klass.const_set( :DATA_END, StringIO.new( end_string ) )
	end
end