Class: Args

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

Class Method Summary collapse

Class Method Details

.parse(args) ⇒ Object

Return a structure describing the options.



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# File 'lib/lapack.rb', line 172

def self.parse(args)
  # The options specified on the command line will be collected in *options*.
  # We set default values here.
  options = OpenStruct.new
  options.command
  opt_parser = OptionParser.new do |opts|
    opts.banner = "Usage: lapack [command] [command_args]..."

    opts.separator ""
    opts.separator "Commands:"
    opts.separator "\t add [reponame] -- add repository. Currently supported: ctan"
    opts.separator "\t update [reponame] -- update repository index."
    opts.separator "\t install [reponame] [package]... [to_dir] -- install packages from repository to specified directory. If no directory specified use current working dir"
    opts.separator "\t remove [reponame] [package]... -- remove packages from local cache"
    opts.separator ""
    opts.separator "Specific options:"

    # No argument, shows at tail.  This will print an options summary.
    # Try it and see!
    opts.on_tail("-h", "--help", "Show this message") do
      puts opts
      exit
    end

    # Another typical switch to print the version.
    opts.on_tail("--version", "Show version") do
      puts Version.join('.')
      exit
    end
  end

  opt_parser.parse!(args)
  options
end