Class: Warg::Host

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

Defined Under Namespace

Modules: Parser Classes: CommandOutcome

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(user: nil, address:, port: nil, properties: {}) ⇒ Host

Returns a new instance of Host.



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# File 'lib/warg.rb', line 764

def initialize(user: nil, address:, port: nil, properties: {})
  @user = user
  @address = address
  @port = port
  @properties = properties.transform_keys(&:to_s)

  build_uri!
end

Instance Attribute Details

#address ⇒ Object (readonly)

Returns the value of attribute address.



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# File 'lib/warg.rb', line 758

def address
  @address
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/warg.rb', line 759

def id
  @id
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/warg.rb', line 760

def port
  @port
end

#uri ⇒ Object (readonly)

Returns the value of attribute uri.



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# File 'lib/warg.rb', line 761

def uri
  @uri
end

#user ⇒ Object (readonly)

Returns the value of attribute user.



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# File 'lib/warg.rb', line 762

def user
  @user
end

Class Method Details

.from(host_data) ⇒ Object 



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# File 'lib/warg.rb', line 720

def self.from(host_data)
  case host_data
  when Host
    host_data
  when Hash
    attributes = host_data.transform_keys(&:to_sym)

    new(**attributes)
  when Array
    if host_data.length == 1 && Hash === host_data[0]
      from(host_data[0])
    elsif String === host_data[0]
      last_item_index = -1
      attributes = Parser.(host_data[0])

      if Hash === host_data[-1]
        last_item_index = -2

        more_properties = host_data[-1].transform_keys(&:to_sym)
        attributes[:properties].merge!(more_properties)
      end

      host_data[1..last_item_index].each do |property|
        name, value = property.to_s.split("=", 2)
        attributes[:properties][name.to_sym] = value
      end

      new(**attributes)
    else
      raise InvalidHostDataError.new(host_data)
    end
  when String
    new(**Parser.(host_data))
  else
    raise InvalidHostDataError.new(host_data)
  end
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql? 



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# File 'lib/warg.rb', line 795

def ==(other)
  self.class == other.class && uri == other.uri
end

#[](name) ⇒ Object 



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# File 'lib/warg.rb', line 783

def [](name)
  @properties[name.to_s]
end

#[]=(name, value) ⇒ Object 



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# File 'lib/warg.rb', line 787

def []=(name, value)
  @properties[name.to_s] = value

  build_uri!

  value
end

#create_directory(directory) ⇒ Object 



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# File 'lib/warg.rb', line 856

def create_directory(directory)
  command = "mkdir -p #{directory}"

  connection.open_channel do |channel|
    channel.exec(command)
    channel.wait
  end

  connection.loop
end

#create_file_from(content, path:, mode: 0644) ⇒ Object 



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# File 'lib/warg.rb', line 867

def create_file_from(content, path:, mode: 0644)
  filename = "#{id}-#{File.basename(path)}"

  tempfile = Tempfile.new(filename)
  tempfile.chmod(mode)
  tempfile.write(content)
  tempfile.rewind

  upload tempfile, to: path

  tempfile.unlink
end

#download(path, to: nil) ⇒ Object 



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# File 'lib/warg.rb', line 884

def download(path, to: nil)
  content = connection.scp.download!(path)

  if to
    file = File.new(to, "w+b")
  else
    file = Tempfile.new(path)
  end

  file.write(content)
  file.rewind

  file
end

#hash ⇒ Object 



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# File 'lib/warg.rb', line 801

def hash
  inspect.hash
end

#inspect ⇒ Object 



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# File 'lib/warg.rb', line 899

def inspect
  %{#<#{self.class.name} uri=#{@uri.to_s}>}
end

#matches?(filters) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/warg.rb', line 773

def matches?(filters)
  filters.all? do |name, value|
    if respond_to?(name)
      send(name) == value
    else
      @properties[name.to_s] == value
    end
  end
end

#run_command(command, &setup) ⇒ Object 



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# File 'lib/warg.rb', line 805

def run_command(command, &setup)
  outcome = CommandOutcome.new(self, command, &setup)

  connection.open_channel do |channel|
    channel.exec(command) do |_, success|
      outcome.command_started!

      channel.on_data do |_, data|
        outcome.collect_stdout(data)
      end

      channel.on_extended_data do |_, __, data|
        outcome.collect_stderr(data)
      end

      channel.on_request("exit-status") do |_, data|
        outcome.exit_status = data.read_long
      end

      channel.on_request("exit-signal") do |_, data|
        outcome.exit_signal = data.read_string
      end

      channel.on_open_failed do |_, code, reason|
        outcome.connection_failed(code, reason)
      end

      channel.on_close do |_|
        outcome.command_finished!
      end
    end

    channel.wait
  end

  connection.loop

  outcome
rescue SocketError, Errno::ECONNREFUSED, Net::SSH::AuthenticationFailed => error
  outcome.connection_failed(-1, "#{error.class}: #{error.message}")
  outcome
end

#run_script(script, &setup) ⇒ Object 



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# File 'lib/warg.rb', line 848

def run_script(script, &setup)
  create_directory script.install_directory

  create_file_from script.content, path: script.install_path, mode: 0755

  run_command(script.remote_path, &setup)
end

#to_s ⇒ Object 



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# File 'lib/warg.rb', line 903

def to_s
  @uri.to_s
end

#upload(file, to:) ⇒ Object 



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# File 'lib/warg.rb', line 880

def upload(file, to:)
  connection.scp.upload!(file, to)
end