Gradle Kotlin project with no code cannot be started in Dev mode

[xstefank]

Describe the bug

$ quarkus create app org.acme:no-code-kotlin --extension quarkus-rest,kotlin --gradle-kotlin-dsl --no-code

$ quarkus dev
> Task :quarkusDev FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':quarkusDev'.
> The `src/main/java` directory is required, please create it.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

BUILD FAILED in 3s
9 actionable tasks: 1 executed, 8 up-to-date

Maven works, so this is only issue with Gradle.

Expected behavior

No response

Actual behavior

No response

How to Reproduce?

See the description.

Output of uname -a or ver

No response

Output of java -version

No response

Quarkus version or git rev

3.17.4

Build tool (ie. output of mvnw --version or gradlew --version)

$ ./gradlew --version ------------------------------------------------------------ Gradle 8.9 ------------------------------------------------------------ Build time: 2024-07-11 14:37:41 UTC Revision: d536ef36a19186ccc596d8817123e5445f30fef8 Kotlin: 1.9.23 Groovy: 3.0.21 Ant: Apache Ant(TM) version 1.10.13 compiled on January 4 2023 Launcher JVM: 21.0.5 (Eclipse Adoptium 21.0.5+11-LTS) Daemon JVM: /home/mstefank/.sdkman/candidates/java/21.0.5-tem (no JDK specified, using current Java home) OS: Linux 6.11.10-300.fc41.x86_64 amd64

Additional information

No response

[quarkus-bot]

/cc @geoand (kotlin), @glefloch, @quarkusio/devtools

[gsmet]

Ideally, when you report an issue, it would be nice if you could go the extra mile and provide a full stack trace in the description.

Granted, I can reproduce it but it's a lot better for search engines and it also helps the maintainers trying to get an understanding of the issue and prioritize properly.

In this case, quarkus dev -e gives you:

Caused by: org.gradle.api.GradleException: The `src/main/java` directory is required, please create it.
        at io.quarkus.gradle.tasks.QuarkusDev.startDev(QuarkusDev.java:334)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:125)

(for Quarkus 3.17.5)

[gsmet]

This is a can of worms - not completely surprised.

It's easy to lift the early restrictions but you then get NPEs further in the build process so I think I will just improve the log message for now.

[gsmet]

I created #45291 for now as an easy win.

I'm not sure if things can be improved further but I will let it to someone interested in contributing to the Gradle plugin.

[xstefank]

thanks @gsmet, we can open a new issue if there is further change in the gradle plugin.