Class: EC2::Host::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/ec2/host/cli.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(argv = ARGV) ⇒ CLI

Returns a new instance of CLI



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# File 'lib/ec2/host/cli.rb', line 9

def initialize(argv = ARGV)
  @options = parse_options(argv)
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options



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# File 'lib/ec2/host/cli.rb', line 7

def options
  @options
end

Instance Method Details

#parse_options(argv = ARGV) ⇒ Object 



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# File 'lib/ec2/host/cli.rb', line 13

def parse_options(argv = ARGV)
  op = OptionParser.new

  self.class.module_eval do
    define_method(:usage) do |msg = nil|
      puts op.to_s
      puts "error: #{msg}" if msg
      exit 1
    end
  end

  opts = {
    state: ["running"]
  }

  op.on('--hostname one,two,three', Array, "name or private_dns_name") {|v|
    opts[:hostname] = v
  }
  op.on('-r', '--role one,two,three', Array, "role") {|v|
    opts[:role] = v
  }
  1.upto(Config.role_max_depth).each do |i|
    op.on("--r#{i}", "--role#{i} one,two,three", Array, "role#{i}, #{i}th part of role delimited by #{Config.role_tag_delimiter}") {|v|
      opts["role#{i}".to_sym] = v
    }
  end
  op.on('--instance-id one,two,three', Array, "instance_id") {|v|
    opts[:instance_id] = v
  }
  op.on('--state one,two,three', Array, "filter with instance state such as running, stopped (default: running)") {|v|
    opts[:state] = v
  }
  op.on('--monitoring one,two,three', Array, "filter with instance monitoring") {|v|
    opts[:monitoring] = v
  }
  op.on('--[no-]spot', "filter to spot or non-spot instances") {|v|
    opts[:spot] = v
  }
  Config.optional_options.each do |opt, tag|
    op.on("--#{opt.to_s.gsub('_', '-')} one,two,three", Array, opt) {|v|
      opts[opt.to_sym] = v
    }
  end
  op.on('-a', '--all', "list all hosts (remove default filter)") {|v|
    [:hostname, :role, :instance_id, :state, :monitoring].each do |key|
      opts.delete(key)
    end
    1.upto(Config.role_max_depth).each do |i|
      opts.delete("role#{i}".to_sym)
    end
    Config.optional_options.each do |opt, tag|
      opts.delete(opt.to_sym)
    end
  }
  op.on('--private-ip', '--ip', "show private ip address instead of hostname") {|v|
    opts[:private_ip] = v
  }
  op.on('--public-ip', "show public ip address instead of hostname") {|v|
    opts[:public_ip] = v
  }
  op.on('-i', '--info', "show host info") {|v|
    opts[:info] = v
  }
  op.on('-j', '--jsonl', "show host info in line delimited json") {|v|
    opts[:jsonl] = v
  }
  op.on('--json', "show host info in json") {|v|
    opts[:json] = v
  }
  op.on('--pretty-json', "show host info in pretty json") {|v|
    opts[:pretty_json] = v
  }
  op.on('--debug', "debug mode") {|v|
    opts[:debug] = v
  }
  op.on('-h', '--help', "show help") {|v|
    opts[:help] = v
  }
  op.on('-v', '--version', "show version") {|v|
    puts EC2::Host::VERSION
    exit 0
  }

  begin
    args = op.parse(argv)
  rescue OptionParser::InvalidOption => e
    usage e.message
  end

  if opts[:help]
    usage
  end

  opts
end

#run ⇒ Object 



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# File 'lib/ec2/host/cli.rb', line 109

def run
  hosts = EC2::Host.new(condition).sort_by {|host| host.hostname }
  if options[:info]
    hosts.each do |host|
      $stdout.puts host.info
    end
  elsif options[:jsonl]
    hosts.each do |host|
      $stdout.puts host.to_hash.to_json
    end
  elsif options[:json]
    $stdout.puts hosts.map(&:to_hash).to_json
  elsif options[:pretty_json]
    $stdout.puts JSON.pretty_generate(hosts.map(&:to_hash))
  elsif options[:private_ip]
    hosts.each do |host|
      $stdout.puts host.private_ip_address
    end
  elsif options[:public_ip]
    hosts.each do |host|
      $stdout.puts host.public_ip_address
    end
  else
    hosts.each do |host|
      $stdout.puts host.hostname
    end
  end
end