Class: Lrama::OptionParser

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

Overview

Handle option parsing for the command line interface.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ OptionParser

Returns a new instance of OptionParser.



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# File 'lib/lrama/option_parser.rb', line 8

def initialize
  @options = Options.new
  @trace = []
  @report = []
end

Instance Method Details

#parse(argv) ⇒ Object 



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# File 'lib/lrama/option_parser.rb', line 14

def parse(argv)
  parse_by_option_parser(argv)

  @options.trace_opts = validate_trace(@trace)
  @options.report_opts = validate_report(@report)
  @options.grammar_file = argv.shift

  unless @options.grammar_file
    abort "File should be specified\n"
  end

  if @options.grammar_file == '-'
    @options.grammar_file = argv.shift or abort "File name for STDIN should be specified\n"
  else
    @options.y = File.open(@options.grammar_file, 'r')
  end

  if !@report.empty? && @options.report_file.nil? && @options.grammar_file
    @options.report_file = File.dirname(@options.grammar_file) + "/" + File.basename(@options.grammar_file, ".*") + ".output"
  end

  if !@options.header_file && @options.header
    case
    when @options.outfile
      @options.header_file = File.dirname(@options.outfile) + "/" + File.basename(@options.outfile, ".*") + ".h"
    when @options.grammar_file
      @options.header_file = File.dirname(@options.grammar_file) + "/" + File.basename(@options.grammar_file, ".*") + ".h"
    end
  end

  @options
end