Class: Dockerchain::CLI::OptionParser

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ OptionParser

Returns a new instance of OptionParser.



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# File 'lib/dockerchain/cli/option_parser.rb', line 10

def initialize
  # The options specified on the command line will be collected in *options*.
  # We set default values here.
  @options = ::OpenStruct.new
  options.chain_file = ''
  options.log_file = ''
  options.src_path = ''
  options.build_path = ''

  @opt_parser = ::OptionParser.new do |opts|
    opts.banner = 'Usage: dockerchain CHAINFILE [options]'

    opts.separator ''
    opts.separator 'Specific options:'

    opts.on('-l', '--logfile LOGFILE',
            'Specify the LOGFILE to log output to') do |log_file|
      options.log_file = log_file
    end

    opts.on('-s', '--srcpath SRCPATH',
            'Specify the SRCPATH for where to download repositories') do |src_path|
      options.src_path = src_path
    end

    opts.on('-b', '--buildpath BUILDPATH',
            'Specify the BUILDPATH for where to do work') do |build_path|
      options.build_path = build_path
    end

    opts.separator ''
    opts.separator 'Common 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('-v', '--version', 'Show version') do
      puts Dockerchain::VERSION
      exit
    end
  end

end

Instance Attribute Details

#opt_parser ⇒ Object

Returns the value of attribute opt_parser.



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# File 'lib/dockerchain/cli/option_parser.rb', line 8

def opt_parser
  @opt_parser
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/dockerchain/cli/option_parser.rb', line 8

def options
  @options
end

Instance Method Details

#help ⇒ Object 



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# File 'lib/dockerchain/cli/option_parser.rb', line 59

def help
  opt_parser.help
end

#parse(args) ⇒ Object

Return a structure describing the options.



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# File 'lib/dockerchain/cli/option_parser.rb', line 66

def parse(args)
  begin      
    opt_parser.parse!(args)
  rescue ::OptionParser::InvalidOption => e
    puts help
    exit(1)
  end
  options
end