Class: Zeta::Runner

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

Constant Summary collapse

COMMANDS = 
{
  'full_check'             => 'Update contracts and validate infrastructure',
  'validate'               => 'Validate the architecture in the contracts cache dir',
  'update_own_contracts'   => 'Update your own contracts in the contracts cache dir',
  'fetch_remote_contracts' => 'Download remote contracts and update your own contracts in the contracts cache dir'
}

Class Method Summary collapse

Class Method Details

.run ⇒ Object 



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# File 'lib/zeta/runner.rb', line 12

def self.run
  options = {}
  parser = OptionParser.new do |opts|
    opts.banner = "#{'Usage:'.red} zeta [options] command"

    opts.separator ""
    opts.separator "Commands:".yellow

    longest_command = COMMANDS.keys.map(&:length).sort.last + 1
    command_list = []
    COMMANDS.each do |cmd, desc|
      padded_cmd = "#{cmd}:".ljust(longest_command, " ")
      command_list << "    #{padded_cmd} #{desc}"
    end
    opts.separator command_list

    opts.separator ""
    opts.separator "Specific options:".yellow

    opts.on("-c CONFIG_FILE", "--config=CONFIG_FILE", "Config file (default: config/zeta.yml)") do |c|
      options[:config_file] = c
    end

    opts.on("-e ENVIRONMENT", "--env=ENVIRONMENT", "Environment (default: RAILS_ENV, if it is set)") do |e|
      options[:env] = e
    end

    opts.on("-s", "--silent", "No output, just an appropriate return code") do |s|
      options[:silent] = s
    end

    opts.on("-t", "--trace", "Print exception stack traces") do |t|
      options[:trace] = t
    end

    opts.separator ""
    opts.separator "Common options:".yellow

    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 Zeta::VERSION
      exit
    end
  end
  parser.parse!

  commands = ARGV
  if commands.empty? or !(commands-COMMANDS.keys).empty?
    puts parser
    exit(-1)
  end

  options[:verbose] = !options.delete(:silent)
  zeta = Zeta.new(options)

  begin
    if commands.include?('fetch_remote_contracts') or commands.include?('full_check')
      zeta.update_contracts
      puts "\n" if options[:verbose]
    end

    if commands.include?('update_own_contracts')
      puts "Copying #{zeta.config[:service_name].to_s.camelize} contracts..." if options[:verbose]
      zeta.update_own_contracts
      puts "\n" if options[:verbose]
    end

    if commands.include?('validate') or commands.include?('full_check')
      puts "Validating your infrastructure with #{zeta.infrastructure.publishers.length} publishers and #{zeta.infrastructure.consumers.length} consumers..." if options[:verbose]
      zeta.contracts_fulfilled?
      unless zeta.errors.empty?
        exit(-1)
      end
    end
  rescue => e
    if options[:trace]
      raise
    else
      puts "ERROR: ".red + e.message
      puts "(Pssst: try the "+"--trace".yellow+" option?)"
    end
    exit(-1)
  end
end