Class: LazyGraph::CLI

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

Class Method Summary collapse

Class Method Details

.invoke!(rack_app) ⇒ Object

A builder group rack-app can be exposed via a simple rack based HTTP server with routes corresponding to each builder class deeply nested withhin the builder group module.



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# File 'lib/lazy_graph/cli.rb', line 8

def self.invoke!(rack_app)
  require 'etc'
  require 'optparse'
  require 'rack'

  options = {
    port: 9292,
    workers: (Environment.development? ? 1 : Etc.nprocessors)
  }

  OptionParser.new do |opts|
    opts.banner = "Usage: #{$0} [options]"

    opts.on('-p PORT', '--port PORT', Integer, "Set the port (default: #{options[:port]})") do |p|
      options[:port] = p
    end

    opts.on('-w WORKERS', '--workers WORKERS', Integer,
            "Set the number of workers (default: #{options[:workers]})") do |w|
      options[:workers] = w
    end

    opts.on('-h', '--help', 'Print this help') do
      puts opts
      exit
    end
  end.parse!
  # A builder group can be exposed as a simple rack based HTTP server
  # with routes corresponding to each builder class deeply nested
  # withhin the builder group module.

  RackServer.new(
    Rack::Builder.new do
      use Rack::Lint if Environment.development?
      run rack_app
    end
  ).start(port: options[:port], workers: options[:workers])
end