So I think I m missing something obvious but I ve been stuck

Question

So I think I m missing something obvious but I ve been stuck on this problem for a while and can t find any examples solving a similar problem What I m doing is generating a type adapter that takes classes of As and turns them into classes of B This has gone pretty well but I m running issues with the next step I want to take which is generating a B provider using the adapters It seems like this requires knowing what all the adapters I ve already created are so I need a second phase of file generation and this is where I ve been running into issues Are there any examples of generating files in the analysisCompleted phase or modifying files in that phase I haven t been able to figure out how to create a `Transformation newSources` from within that function or how to create a new KtFile successfully the KtFile I ve created and added to the files list have led to a NPE with the message VirtualFile is null for KtFile Any insight into how to create the provider in a second phase of analysis would be helpful or a way of incrementally building a file during analysis that would only be written out when analysis was completed

raulraja · Answer

Not sure if it helps but the current proof system finds providers of instances based on extension functions which is how you go there from a type to another Do you have some sample code What you are describing sounds close to our proof system in terms of impl

dalexander · Answer

That does sound somewhat similar I can share some code in DM depending on what you re interested in seeing

dalexander · Answer

I didn t mention in the initial info dump but I also just tried regenerating the provider file every time I create a new adapter but even though there s only a single output file the compiler seems to find N instances of the file which leads to an error message about redeclaring the DataProvider class

dalexander · Answer

To answer my own question sweat smile it appears as thought KtPsiFactory createFile will potentially cause this NPE about the VirtualFile being null the solution appears to be to call `createPhysicalFile` instead which seems to resolve the issue

dalexander · Answer

I m still running into other complications about package paths I ll try and share the solution when I find it so other people who need to do something similar will have some guideposts It is notable that `Transform newSources lt KtFile gt fileText file fileName filePath ` in the `analysisCompleted` phase doesn t seem to work because internally it creates a KtFile that doesn t have a virtualPath so trying to use that seems to cause a NPE I mentioned in the original message

raulraja · Answer

that is most likely a bug if you don t mind creating an issue it should be an easy fix where we can create instead a temp file

dalexander · Answer

I ll see about opening a ticket with the stack trace and what I learned about the underlying issue

dalexander · Answer

```fun Meta reanalyze shouldReanalyze gt Boolean onReanalyze gt Unit ExtensionPhase = analysis doAnalysis = gt null analysisCompleted = project module bindingTrace files gt if shouldReanalyze onReanalyze AnalysisResult RetryWithAdditionalRoots bindingTrace bindingContext module emptyList listOfNotNull addToEnvironment = true else null ``` In case anyone else out there is trying to manage a many to one mapping of source files classes to output files adding this particular extension phase to the extension phases in a `meta ` will cause analysis to be re performed then you can use quote syntax to generate new sources Hopefully this saves someone some time