Module: CLI::UI::StdoutRouter

Defined in:
lib/cli/ui/stdout_router.rb

Defined Under Namespace

Classes: Capture, Writer

Constant Summary collapse

WRITE_WITHOUT_CLI_UI =
:write_without_cli_ui
NotEnabled =
Class.new(StandardError)

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.duplicate_output_toObject

Returns the value of attribute duplicate_output_to


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# File 'lib/cli/ui/stdout_router.rb', line 8

def duplicate_output_to
  @duplicate_output_to
end

Class Method Details

.assert_enabled!Object

Raises:


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# File 'lib/cli/ui/stdout_router.rb', line 178

def assert_enabled!
  raise NotEnabled unless enabled?
end

.current_idObject


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# File 'lib/cli/ui/stdout_router.rb', line 174

def current_id
  Thread.current[:cliui_output_id]
end

.disableObject


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# File 'lib/cli/ui/stdout_router.rb', line 205

def disable
  return false unless enabled?($stdout) && enabled?($stderr)
  deactivate($stdout)
  deactivate($stderr)
  true
end

.enableObject


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# File 'lib/cli/ui/stdout_router.rb', line 194

def enable
  return false if enabled?($stdout) || enabled?($stderr)
  activate($stdout, :stdout)
  activate($stderr, :stderr)
  true
end

.enabled?(stream = $stdout) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/cli/ui/stdout_router.rb', line 201

def enabled?(stream = $stdout)
  stream.respond_to?(WRITE_WITHOUT_CLI_UI)
end

.ensure_activatedObject

TODO: remove this


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# File 'lib/cli/ui/stdout_router.rb', line 190

def ensure_activated
  enable unless enabled?
end

.with_enabledObject


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# File 'lib/cli/ui/stdout_router.rb', line 182

def with_enabled
  enable
  yield
ensure
  disable
end

.with_id(on_streams:) ⇒ Object


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# File 'lib/cli/ui/stdout_router.rb', line 154

def with_id(on_streams:)
  unless on_streams.is_a?(Array) && on_streams.all? { |s| s.respond_to?(:write) }
    raise ArgumentError, <<~EOF
    on_streams must be an array of objects that respond to `write`
    These do not respond to write
    #{on_streams.reject { |s| s.respond_to?(:write) }.map.with_index { |s| s.class.to_s }.join("\n")}
    EOF
  end

  require 'securerandom'
  id = format("%05d", rand(10**5))
  Thread.current[:cliui_output_id] = {
    id: id,
    streams: on_streams,
  }
  yield(id)
ensure
  Thread.current[:cliui_output_id] = nil
end