Class: Amp::Dispatch::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/amp-front/dispatch/runner.rb

Overview

This class runs Amp as a binary. Create a new instance with the arguments to use, and call run! to run Amp.

Instance Method Summary collapse

Constructor Details

#initialize(args, opts = {}) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/amp-front/dispatch/runner.rb', line 21

def initialize(args, opts={})
  @args, @opts = args, opts
end

Instance Method Details

#collect_options(arguments) ⇒ Object 



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# File 'lib/amp-front/dispatch/runner.rb', line 75

def collect_options(arguments)
  argv = arguments.dup
  _, hash = Trollop::options(argv) do
    banner "Amp - some more crystal, sir?"
    version "Amp version #{Amp::VERSION} (#{Amp::VERSION_TITLE})"
    stop_on_unknown
  end
  [hash, argv]
end

#load_ampfile!(in_dir = Dir.pwd) ⇒ Object

Loads the ampfile (or whatever it’s specified as) from the current directory or a parent directory.



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# File 'lib/amp-front/dispatch/runner.rb', line 43

def load_ampfile!(in_dir = Dir.pwd)
  file = @opts[:ampfile] || 'ampfile'
  variations = [file, file[0,1].upcase + file[1..-1]] # include titlecase
  to_load = variations.find {|x| File.exist?(File.join(in_dir, x))}
  if to_load
    load to_load
  elsif File.dirname(in_dir) != in_dir
    load_ampfile! File.dirname(in_dir)
  end
end

#load_plugins! ⇒ Object 



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# File 'lib/amp-front/dispatch/runner.rb', line 54

def load_plugins!
  Amp::Plugins::Base.all_plugins.each do |plugin|
    instance = plugin.new(@opts)
    instance.load!
    Amp::Plugins::Base.loaded_plugins << instance
  end
end

#run! ⇒ Object 



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# File 'lib/amp-front/dispatch/runner.rb', line 25

def run!
  global_opts, arguments = collect_options(@args)
  load_ampfile!
  load_plugins!

  command_class = Amp::Command.for_name(arguments.join(' '))
  if command_class.nil?
    command_class = Amp::Command::Help
  else
    arguments = trim_argv_for_command(arguments, command_class)
  end
  command = command_class.new
  opts, arguments = command.collect_options(arguments)
  command.call(opts.merge(global_opts), arguments)
end

#trim_argv_for_command(arguments, command) ⇒ Object 



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# File 'lib/amp-front/dispatch/runner.rb', line 62

def trim_argv_for_command(arguments, command)
  argv = arguments.dup
  path_parts = command.inspect.gsub(/Amp::Command::/, '').gsub(/::/, ' ').split
  path_parts.each do |part|
    next_part = argv.shift
    if next_part.downcase != part.downcase
      raise ArgumentError.new(
          "Failed to parse command line option for: #{command.inspect}")
    end
  end
  argv
end