How to debug Gradle + Groovy in VSCode?

[aentwist]

I have a Gradle + Groovy Micronaut project that I want to debug in VSCode. The project has one caveat, it has a dotenv environment variable file .env.local.

I am currently running the project with dotenv -c -- ./gradlew run. To debug it, I add the --debug-jvm option. I am able to attach on port 5005.

I make a request that runs over a breakpoint, but execution does not stop at the breakpoint. Am I doing something wrong?

Attach configuration:

{
  "type": "java",
  "request": "attach",
  "name": "Attach to Java App",
  "hostName": "localhost",
  "port": 5005
}

Also, if there is any way to start the project with a launch configuration, that would be better than starting it elsewhere and then attaching? My current launch configuration seems to hang. Maybe I need to use preLaunchTask somehow?

Launch configuration:

{
  "type": "java",
  "request": "launch",
  "name": "Launch Java App",
  "mainClass": "com.example.Main",
  "envFile": "${workspaceFolder}/.env.local",
  "vmArgs": ["-Dorg.gradle.debug"]
}

[graemerocher]

This works out of the box if you uninstall VSCode for Java and install the "GraalVM Tools for Micronaut". Just open the Main class and hit F5 to debug.

See https://marketplace.visualstudio.com/items?itemName=oracle-labs-graalvm.micronaut