Is it possible to convert the output of a `TaskProvider lt S

Question

Is it possible to convert the output of a `TaskProvider lt Sync gt ` into a `Provider lt FileSystemLocation gt ` and support the config cache With ```fun TaskProvider lt Sync gt asFileSystemLocationSingleFile Provider lt FileSystemLocation gt return map it outputs files asFileTree elements get map seeing ` gt Collection is empty ` error with config cache on it first ``` I m seeing this error ```1 problem was found storing the configuration cache Task ` jenkinsfile jenkinsfile shared modifySharedGroovy` of type `Build gradle$ModifySharedGroovy` value map org gradle api file FileSystemLocation map map provider task syncOriginalSharedGroovy class org gradle api tasks Sync check type failed to unpack provider```

Zak Taccardi · Answer

This using `Set lt FileSystemLocation gt ` instead of `FileSystemLocation` however works ```fun TaskProvider lt Sync gt asFileSystemLocationSet Provider lt Set lt FileSystemLocation gt gt return map it outputs files asFileTree elements get ``` I think this is because Gradle understands that the `Set lt gt ` is live and pulling a single `FileSystemLocation` out of it breaks that behavior

Zak Taccardi · Answer

However I don t want to define my task input as `Set lt FileSystemLocation gt ` when it s only 1 file I want to define it as `FileSystemLocation`

Rodrigo Oliveira · Answer

Perhaps the following would work ```fun TaskProvider lt Sync gt asFileSystemLocationSingleFile Provider lt FileSystemLocation gt return flatMap sync gt sync outputs files asFileTree elements map it first ```

Rodrigo Oliveira · Answer

The `asFileTree` step looks redundant ```fun TaskProvider lt Sync gt asFileSystemLocationSingleFile Provider lt FileSystemLocation gt return flatMap sync gt sync outputs files elements map it first ```

Zak Taccardi · Answer

I ve had so many issues with flatmap tbh bc it switches the provider and seems to break the chain of dependent tasks but I ll try it

Zak Taccardi · Answer

```fun TaskProvider lt Sync gt asFileSystemLocationSingleFile Provider lt FileSystemLocation gt return flatMap sync gt sync outputs files asFileTree elements map it first ``` worked Needed to use ` asFileTree` to get the actual file output instead of the directory