module Dev::UI::StdoutRouter

Constants

NotEnabled
WRITE_WITHOUT_DEV_UI

Attributes

duplicate_output_to[RW]

Public Class Methods

assert_enabled!() click to toggle source
# File lib/dev/ui/stdout_router.rb, line 134
def assert_enabled!
  raise NotEnabled unless enabled?
end
disable() click to toggle source
# File lib/dev/ui/stdout_router.rb, line 161
def disable
  return false unless enabled?($stdout) && enabled?($stderr)
  deactivate($stdout)
  deactivate($stderr)
  true
end
enable() click to toggle source
# File lib/dev/ui/stdout_router.rb, line 150
def enable
  return false if enabled?($stdout) || enabled?($stderr)
  activate($stdout, :stdout)
  activate($stderr, :stderr)
  true
end
enabled?(stream = $stdout) click to toggle source
# File lib/dev/ui/stdout_router.rb, line 157
def enabled?(stream = $stdout)
  stream.respond_to?(WRITE_WITHOUT_DEV_UI)
end
ensure_activated() click to toggle source

TODO: remove this

# File lib/dev/ui/stdout_router.rb, line 146
def ensure_activated
  enable unless enabled?
end
with_enabled() { || ... } click to toggle source
# File lib/dev/ui/stdout_router.rb, line 138
def with_enabled
  enable
  yield
ensure
  disable
end

Private Class Methods

activate(stream, streamname) click to toggle source
# File lib/dev/ui/stdout_router.rb, line 176
def activate(stream, streamname)
  writer = StdoutRouter::Writer.new(stream, streamname)

  raise if stream.respond_to?(WRITE_WITHOUT_DEV_UI)
  stream.singleton_class.send(:alias_method, WRITE_WITHOUT_DEV_UI, :write)
  stream.define_singleton_method(:write) do |*args|
    writer.write(*args)
  end
end
deactivate(stream) click to toggle source
# File lib/dev/ui/stdout_router.rb, line 170
def deactivate(stream)
  sc = stream.singleton_class
  sc.send(:remove_method, :write)
  sc.send(:alias_method, :write, WRITE_WITHOUT_DEV_UI)
end