Accessing to aspect from class doesnt work after rebuild

[hohserg1]

How to reproduce:

1. create new project
   build.gradle: https://gist.github.com/hohserg1/fa5cface77c0613ff2421bb3a9f31d27
   gradle-wrapper.properties: distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
2. add source code: https://gist.github.com/hohserg1/ae21ca49f281dfebe6c7431372c37bfd
3. execute gradlew build
   got compilation error: https://gist.github.com/hohserg1/26cd155afdca7e9dadba3d171fc2f04d
4. change source code(remove accessing to aspect from class): https://gist.github.com/hohserg1/1c7b32834c0e2b2233e3efcff97d78b3
5. execute gradlew build
   compilation successed
6. try run

> Task :Main.main()
from Main
from TestAspect

8. change source code back: https://gist.github.com/hohserg1/ae21ca49f281dfebe6c7431372c37bfd
9. execute gradlew build
   compilation successed
10. try run

> Task :Main.main()
from Main
from TestAspect
true

11. execute gradlew clean
12. execute gradlew build
    got compilation error: https://gist.github.com/hohserg1/26cd155afdca7e9dadba3d171fc2f04d
13. repeat from step 5

Expected behavior:
Compilation must be successed from clean project

I'm not sure, if its really need to access to aspect's fields/methods, but kinda bug

Also reproducing at 6.5.1 plugin version

[larsgrefer]

TL;DR: The post-compile-weaving plugin is not meant to compile *.aj sources directly, try io.freefair.aspectj

With your current setup, you are using both javac and ajc to compile your source files.

First, javac runs as it usually would with gradles "compileJava" task. But javac can only read *.java files, so it cannot find org.example.aspect.TestAspect. After removing the reference to org.example.aspect.TestAspect javac can compile the .java file just fine.

After this, an additional action added to the compileJava task executes ajc, which will successfully compile both source files.

Once the aspect has been compiled once by ajc, javac can now also see the .class file of the aspect.
So from then on, javac can compile the .java file with access to the aspect.

When dealing with .aj files, you should try the io.freefair.aspectj plugin instead, which adds an additional sourceDir src/main/aspectj where you can put .aj and .java files, which will then be compiled by ajc only.