Incremental processing doesn't copy backed up files after KSP finishes

[LukasAnda]

Prerequisites:

• Annotation that is used by multiple classes

Steps to reproduce:

1. Clean project + rebuild project
2. Change one of the files containing annotation
3. Make project

Expected results:
All non-dirty files should be where they were

Actual results:
Only changed files get processed and non-dirty files get deleted

Ksp version: 1.7.20-1.0.7

[neetopia]

is this your reproduce repo?
https://github.com/LukasAnda/NaviKator

[LukasAnda]

It needs to be updated with reproducible example, I'll do that tomorrow

[LukasAnda]

@neetopia yes, that is the repo with reproducible issue. Right now in app's build.gradle there is a fix with a gradle task that copies the remaining files.

Steps to reproduce the bug:

1. In app's build.gradle comment out the afterEvaluate block (lines 52 to 68)
2. Clean build + rebuild
3. Change a line (for example add a newline) in HomeViewModel
4. Make project (The hammer icon)
5. See the compilation fails.

Expected result:
The compilation should work

How to fix this:

1. Enable task to fix the issue in app's build.gradle once again
2. Clean build + rebuild
3. Any changes + Make will result in compilation working

Please note that the project should be opened in Android Studio. I've used AS Electric Eel 2022.1.1 Beta 5

[huanglongyu]

I encountered the same problem, but fortunately @LukasAnda was able to provide a solution. I am looking forward to the official resolution.

[ting-yuan]

Hi @LukasAnda, KSP needs processors' help to associate inputs and outputs so as to maintain the clean outputs. In the given sample project, all the outputs are not associated to any (clean) sources, and therefore they are orphaned and got purged.

Can you try to supply originatingKSFiles to FileSpec.writeTo?

E.g.,

// NavigationRouteGenerator.kt
fileSpec.writeTo(
    codeGenerator,
    aggregating = false,
    originatingKSFiles = listOf(viewModel.containingFile!!, content.containingFile!!)
)

// NavigationRouteVisitor.kt
fileSpec.writeTo(
    codeGenerator,
    aggregating = true,
    originatingKSFiles = listOf(classDeclaration.containingFile!!)
)

[huanglongyu]

it works in my case