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Debugging.md

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Running and Debugging Flutter for Desktop in IDEs

VS Code

To enable desktop support in Dart Code, add the flag to dart.env in the VS Code settings.json:

"dart.env": {
    "ENABLE_FLUTTER_DESKTOP": true,
}

You may need to restart VS Code for this change to take effect.

Note: This is not consistently working for everyone; investigation is in progress, but for now if this doesn't work, use the approach described under "Android Studio/IntelliJ" below.

Running

Once desktop support is enabled, you can run and debug using the normal Dart Code workflow.

Attaching

Add a launch configuration like the following:

 {
   "name": "Flutter Desktop Attach",
   "request": "attach",		
   "observatoryUri": "http://127.0.0.1:1234/abcdef123456/",	
   "type": "dart"	
 }

You will need to update the observatoryUri every time you re-launch your application using the logged Observatry URI (look for a line starting with Observatory listening on), as both the port (1234) and token (abcdef123456) portions will change on every launch. Be sure to save the file before trying to attach.

In the future, there will hopefully be a simpler workflow that uses a prompt rather than having to edit the launch configuration every time. Watch this Dart Code issue for updates.

Android Studio/IntelliJ

Running

It is not currently possible to set the ENABLE_FLUTTER_DESKTOP environment variable from within IntelliJ. However, if you set it in the environment used to launch the application (details vary by OS), you should be able to use the normal run/debug workflow.

Attaching

TBD. It may be possible to create an attach configuration for IntelliJ using the observatory URI printed to the console. If you test IntelliJ and are able to attach successfully, please contribute instructions!