Class: SnowmanIO::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/snowman-io/cli.rb

Overview

The command line interface for SnowmanIO.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/snowman-io/cli.rb', line 13

def initialize(options = {})
  @options = options
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/snowman-io/cli.rb', line 6

def options
  @options
end

Class Method Details

.run ⇒ Object 



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# File 'lib/snowman-io/cli.rb', line 8

def self.run
  options = Options.new.parse!(ARGV)
  new(options).run
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/snowman-io/cli.rb', line 17

def run
  setup_logger

  # Self-pipe for deferred signal-handling (http://cr.yp.to/docs/selfpipe.html)
  self_read, self_write = IO.pipe

  %w(INT TERM USR1 USR2 TTIN).each do |sig|
    begin
      trap sig do
        self_write.puts(sig)
      end
    rescue ArgumentError
      puts "Signal #{sig} not supported"
    end
  end

  launcher = Launcher.new(options)

  begin
    launcher.start
    while readable_io = IO.select([self_read])
      signal = readable_io.first[0].gets.strip
      handle_signal(signal)
    end
  rescue Interrupt
    SnowmanIO.logger.info 'Shutting down'
    launcher.stop
    exit(0)
  end
end