Radicle Command Line

command_line.rb

#
# This was the command line implementation for Radicle. It's no longer in use, but I thought it was worthwhile
# to keep around, just in case.
#
require "optparse"

module Radicle
  class CommandLine

    # Public: Parses a command line array and returns a hash
    # of options for starting a server.
    def self.parse(argv)
      defaults = Radicle::Server.defaults
      options = defaults.clone

      OptionParser.new do |opts|
        opts.banner = "Usage: radicle [options] [services_directory]"

        opts.separator("")
        opts.separator("services_directory defaults to #{defaults[:services_dir]}")
        opts.separator("")

        opts.on("-h", "--host HOST", "listen on HOST (default: #{defaults[:host]})") do |hostname|
          options[:host] = hostname
        end

        opts.on("-p", "--port PORT", "use PORT (default: #{defaults[:port]})") do |port|
          begin
            port = Integer(port)
            raise if port < 0
          rescue
            raise "Invalid port number"
          end

          options[:port] = port
        end

        opts.on("-n", "--instances INSTANCES", "use INSTANCES number of processes (default: #{defaults[:instance_count]})") do |instances|
          begin
            instances = Integer(instances)
            raise if instances < 0
          rescue
            raise "Invalid instance count"
          end

          options[:instance_count] = instances
        end

        opts.on_tail("-h", "--help", "show this message") do
          puts opts
          exit
        end

      end.parse!(argv)

      # Use the remaining arg for our services directory
      if argv.length > 0
        options[:services_dir] = argv[0]
      end

      options
    end
  end
end