Hilt Gradle Plugin does not work with AGP 9.0.0-alpha04

[pablobaxter]

Looks like the BaseExtension was removed with the latest AGP 9 release:

The extension wasn't removed, but it's not created when the Hilt plugin checks for it. Unsure where the issue lies for this, but leaving this issue open.

Caused by: java.lang.IllegalStateException: Android BaseExtension not found.
    at dagger.hilt.android.plugin.HiltGradlePlugin.configureCompileClasspath(HiltGradlePlugin.kt:139)
at dagger.hilt.android.plugin.HiltGradlePlugin.configureHilt(HiltGradlePlugin.kt:109)
at dagger.hilt.android.plugin.HiltGradlePlugin.apply$lambda$0(HiltGradlePlugin.kt:79)
at dagger.hilt.android.plugin.HiltGradlePlugin.apply$lambda$1(HiltGradlePlugin.kt:77)

[ducrohet]

This is expected. in 9.0 we are switching over to the new DSL, which is documented here. All the former DSL types are not used at runtime, so the implementation of the android extension is only based on CommonExtension, instead of both the old and the new types like we had in 7.x and 8.x.

There is an opt-out for 9.0 to reinstate the old behavior (and this is why the old DSL types are still in the jar), but that opt-out (and the old types) will be removed in ~ summer 2026. So plugins should adapt to the new DSL ASAP.

(9.0 release notes with this particular change should show up in a day or two here)

[Tolriq]

@ducrohet can you already provide the name of the opt out flag ? I can't seem to find it on the doc page that already covers the android.builtInKotlin.

And could those changes also trigger the ben-manes/gradle-versions-plugin#930 (comment) issue ? (Seems AGP breaks Gradle convention and modify things at some steps it should not)

[ychescale9]

The flag is android.newDsl=false.