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Is there `kotllin-dsl` version compatible with kotlin plugin `1.4-M1` ?

The `kotlin-dsl` plugin is intended to use the version of Kotlin embedded in Gradle. So, no version guaranteed to be compatible.

Did you try applying the `kotlin-dsl` plugin on a build that uses the 1.4-M1 of the kotlin gradle plugin? With what Gradle version? Does it fail? How?

Gradle `6.3` with `kotlin-dsl` `1.3.5`
Kotlin `1.4-M1`

Note that you shouldn’t specify a version for the `kotlin-dsl` plugin.

Yeah, that’s Kotlin saying mixing versions isn’t supported .. “strange errors” :slightly_smiling_face:

What happens if you let that warning not fail the build?

Solution - duplicate *default* compiler settings

Ok, so if you do that, then it works for you?

Some collection operations in `buildSrc` don’t work correctly

In any case, there’s not much more you can do except trying and crossing fingers. It’s _not supported_.

Could you please share the error you get?

I generate code in `buildSrc`

`String.replace` don’t replace all entries
Some `List` elements are lost

Hum, that sounds like some `stdlib` incompatibilities between 1.3 and 1.4 ... I suppose that’s a “strange error” like the warning says. :man-shrugging:

Is there any solution for Kotlin Compiler plugin testing in such situations?

You would need a Gradle version that embeds Kotlin 1.4 for all this to work. But that will take time before there’s an official one. We might get to publish some nightlies from a Kotlin 1.4 branch but not immediatly.

Or you could try removing the use of the `kotlin-dsl` plugin, giving up on its features, and simply use the kotlin gradle plugin in your buildSrc.

`kotlin-dsl` applied in `buildSrc` by default. Right?

The `kotlin-dsl` plugin isn’t applied by default, you have to do it:
```// buildSrc/build.gradle.kts
plugins { `kotlin-dsl` }```
If you do, then my suggestion is to remove this plugin application from your buildSrc, giving up on its features.

No warnings without my plugin, which use `kotlin-dsl` !

I can create migration branch if it has value for testing

<@U19P7SPFW> Where will be announced night builds with Kotlin `1.4` ?

Please subscribe to <https://github.com/gradle/gradle/issues/12660>, it’ll get updated when we get to it

Is there a supported alternative to the `kotlin-dsl` plugin? I don’t think I’ve ever seen a kotlin buildSrc configuration that doesn’t use it. The need in my case is to be able to define helper functions used in kotlin build scripts in the rest of the project.

I guess `kotlin("jvm")` is the one <@U2VU05RC4>

Update:

• `buildSrc` - no success with `1.4-M1`  
Invalid `String.replace`
Invalid collection operations
• Gradle plugin &amp; ordinal projects - no WA required