| A Flutter-command that attaches to applications that have been launched |
| without `flutter run` and provides a HotRunner (enabling hot reload/restart). |
| There are four ways for the attach command to discover a running app: |
| 1. If the app is already running and the observatory port is known, it can be |
| explicitly provided to attach via the command-line, e.g. `$ flutter attach |
| 1. If the app is already running and the platform is iOS, attach can use mDNS |
| to lookup the observatory port via the application ID, with just `$ flutter |
| 1. If the platform is Fuchsia the module name must be provided, e.g. `$ |
| flutter attach --module=mod_name`. This can be called either before or after |
| the application is started, attach will poll the device if it cannot |
| immediately discover the port |
| 1. On other platforms (i.e. Android), if the app is not yet running attach |
| will listen and wait for the app to be (manually) started with the default |
| command: `$ flutter attach` |
| See the [source](https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/commands/attach.dart) for the attach command. |
