Class: Hotdog::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/hotdog/application.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Application

Returns a new instance of Application.



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# File 'lib/hotdog/application.rb', line 40

def initialize()
  @logger = Logger.new(STDERR)
  @optparse = OptionParser.new
  @optparse.version = Hotdog::VERSION
  @options = {
    endpoint: nil,
    api_key: nil,
    application_key: nil,
    application: self,
    confdir: find_confdir(File.expand_path(".")),
    debug: false,
    expiry: 3600,
    fixed_string: false,
    force: false,
    format: "text",
    headers: false,
    source: "datadog",
    status: nil,
    listing: false,
    logger: @logger,
    max_time: 5,
    offline: false,
    print0: false,
    print1: true,
    print2: false,
    primary_tag: nil,
    tags: [],
    display_search_tags: false,
    verbose: false,
    verbosity: VERBOSITY_NULL,
  }.reject { |key, val|
    # reject nil values to declare sensible default later in subcommand
    val.nil?
  }
  @source_provider = nil # will be initialized later in `main()`
  define_options
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/hotdog/application.rb', line 77

def logger
  @logger
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/hotdog/application.rb', line 78

def options
  @options
end

#optparse ⇒ Object (readonly)

Returns the value of attribute optparse.



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# File 'lib/hotdog/application.rb', line 79

def optparse
  @optparse
end

#source_provider ⇒ Object (readonly)

Returns the value of attribute source_provider.



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# File 'lib/hotdog/application.rb', line 80

def source_provider
  @source_provider
end

Instance Method Details

#main(argv = []) ⇒ Object 



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# File 'lib/hotdog/application.rb', line 82

def main(argv=[])
  config = File.join(options[:confdir], "config.yml")
  if File.file?(config)
    begin
      loaded = YAML.load(ERB.new(File.read(config)).result)
    rescue => error
      STDERR.puts("hotdog: failed to load configuration file at #{config.inspect}: #{error}")
      exit(1)
    end
    if Hash === loaded
      @options = @options.merge(Hash[loaded.map { |key, value| [Symbol === key ? key : key.to_s.to_sym, value] }])
    end
  end
  args = @optparse.order(argv)

  begin
    if Hash === @options[:source_alias]
      source_name = @options[:source_alias].fetch(@options[:source], @options[:source])
    else
      source_name = @options[:source]
    end
    @source_provider = get_source(source_name)
  rescue NameError
    STDERR.puts("hotdog: '#{source_name}' is not a valid hotdog source.")
    exit(1)
  end

  begin
    given_command_name = ( args.shift || "help" )
    if Hash === @options[:command_alias]
      command_alias = @options[:command_alias].fetch(given_command_name, given_command_name)
      if Array === command_alias
        command_name, *command_args = command_alias
      else
        command_name, *command_args = Shellwords.shellsplit(command_alias)
      end
    else
      command_name = given_command_name
      command_args = []
    end
    begin
      command = get_command(command_name)
    rescue NameError
      STDERR.puts("hotdog: '#{command_name}' is not a hotdog command.")
      get_command("help").run(["commands"], options)
      exit(1)
    end

    @optparse.banner = "Usage: hotdog #{command_name} [options]"
    command.define_options(@optparse, @options)

    begin
      args = command.parse_options(@optparse, command_args + args)
    rescue OptionParser::ParseError => error
      STDERR.puts("hotdog: #{error.message}")
      command.parse_options(@optparse, ["--help"])
      exit(1)
    end

    if options[:format] == "ltsv"
      options[:headers] = true
    end

    if Hash === @options[:format_alias]
      format_name = @options[:format_alias].fetch(@options[:format], @options[:format])
    else
      format_name = @options[:format]
    end
    options[:formatter] = get_formatter(format_name)

    if ( options[:debug] or options[:verbose] ) and ( options[:verbosity] < VERBOSITY_DEBUG )
      options[:verbosity] = VERBOSITY_DEBUG
    end

    if VERBOSITY_DEBUG <= options[:verbosity]
      options[:logger].level = Logger::DEBUG
    else
      if VERBOSITY_INFO <= options[:verbosity]
        options[:logger].level = Logger::INFO
      else
        options[:logger].level = Logger::WARN
      end
    end

    command.run(args, @options)
  rescue Interrupt
    STDERR.puts("Interrupt")
  rescue Errno::EPIPE => error
    STDERR.puts(error)
  rescue => error
    raise # to show error stacktrace
  end
end

#status ⇒ Object 



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# File 'lib/hotdog/application.rb', line 176

def status()
  options.fetch(:status, STATUS_RUNNING)
end

#status_name(status = self.status) ⇒ Object 



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# File 'lib/hotdog/application.rb', line 180

def status_name(status=self.status)
  {
    STATUS_PENDING       => "pending",
    STATUS_RUNNING       => "running",
    STATUS_SHUTTING_DOWN => "shutting-down",
    STATUS_TERMINATED    => "terminated",
    STATUS_STOPPING      => "stopping",
    STATUS_STOPPED       => "stopped",
  }.fetch(status, "unknown")
end