is there a way to pass an option to ksp extension ...

# ksp

[Vaios Tsitsonis]

is there a way to pass an option to ksp extension based on the results of a gradle task? 🤔

[evant]

if your other task exposes a property it should be easy enough to wire up

val otherTask = ...

tasks.withType<com.google.devtools.ksp.gradle.KspTask>().all {
    apOptions.put("myKey", otherTask.output)
}

[Vaios Tsitsonis]

By doing so, environment.options returns an empty map, so SymbolProcessor does not get this option :S

[evant]

is your output of type Property ? If not you'll need to explicitly add the task dependency too

[Vaios Tsitsonis]

I added the following snippet and options are still empty

tasks.withType<com.google.devtools.ksp.gradle.KspTask>().all {
    apOptions.put("myKey", "someDummyValue")
}

[evant]

Oh interesting, looks like the task configuration overrides it with the extension value and prevents further changes

fun configureAsKspTask(kspTask: KspTask, isIncremental: Boolean) {
            // depends on the processor; if the processor changes, it needs to be reprocessed.
            val processorClasspath = project.configurations.maybeCreate("${kspTaskName}ProcessorClasspath")
                .extendsFrom(*nonEmptyKspConfigurations.toTypedArray())
            kspTask.processorClasspath.from(processorClasspath)
            kspTask.dependsOn(processorClasspath.buildDependencies)

            kspTask.options.addAll(
                kspTask.project.provider {
                    getSubpluginOptions(
                        project,
                        kspExtension,
                        processorClasspath,
                        sourceSetName,
                        isIncremental,
                        kspExtension.allWarningsAsErrors
                    )
                }
            )
            kspTask.destination = kspOutputDir
            kspTask.blockOtherCompilerPlugins = kspExtension.blockOtherCompilerPlugins
            kspTask.apOptions.value(kspExtension.arguments).disallowChanges()
            kspTask.kspCacheDir.fileValue(getKspCachesDir(project, sourceSetName)).disallowChanges()

            if (kspExtension.blockOtherCompilerPlugins) {
                // FIXME: ask upstream to provide an API to make this not implementation-dependent.
                val cfg = project.configurations.getByName(kotlinCompilation.pluginConfigurationName)
                kspTask.overridePluginClasspath.value(
                    kspTask.project.provider {
                        val dep = cfg.dependencies.single { it.name == KSP_ARTIFACT_NAME }
                        cfg.fileCollection(dep)
                    }
                )
            }
            kspTask.isKspIncremental = isIncremental
        }

may be worth opening an issue about this

[evant]

In theory KspExtension could be updated to use a MapProperty and then you could configure it like

ksp {
  arg("myKey", myTask.output)
}

[Vaios Tsitsonis]

I found a way to pass value from a task with the help of project.extra I do not know if it is the best/recommended way though...