Evening, all. I'm converting a project from Gradl...

# announcements

[Alec Muffett]

Evening, all. I'm converting a project from Gradle-Kotlin to Maven, and in the process of migration have kicked up a worrying warning message. I'm not sure where to report it, suggestions, please?

[INFO] --- kotlin-maven-plugin:1.4.20-RC:compile (compile) @ app ---
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.intellij.util.ReflectionUtil (file:/Users/alecm/.m2/repository/org/jetbrains/kotlin/kotlin-compiler/1.4.20-RC/kotlin-compiler-1.4.20-RC.jar) to method java.util.ResourceBundle.setParent(java.util.ResourceBundle)
WARNING: Please consider reporting this to the maintainers of com.intellij.util.ReflectionUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

[Big Chungus]

I'm curious why you're migrating to maven? Usually it's the other way around since gradle is the main recommended build tool for kotlin.

[Alec Muffett]

Hi @Big Chungus - it's an experiment. So far I have had really bad experiences with trying to use Kotlin-Gradle, there's so little build.gradle.kts documentation for so many of my dependencies, and now as part of the experiment I am learning that some other dependencies are deprecating maven, too. It is beginning to look that the only way to build Kotlin is to use non-Kotlin-gradle. i.e.: Groovy or whatever.

Does this reflect your experience, please?

[Big Chungus]

I have no issues with kotlin-gradle and love using it. The docs are not lacking, just spread out all over the place, so it can be somewhat hard to get a consistent picture of them.

[Alec Muffett]

My challenge is stuff like this: Wire Gradle Plugin - where I don't know enough Gradle to convert the Groovy config over to a KotlinGradle equivalent.

[Big Chungus]

In most cases you should be able to just replace all ' to " and all implicit groovy method invocations to explicits like srcDir 'src/main/protos' -> srcDir("src/main/protos")

[Alec Muffett]

@Big Chungus would you be able to advise me re: converting the gradle-plugin directives on this page, to the .kts equivalent, please?

[Alec Muffett]

If I insert id("com.squareup.wire") version "3.5.0" into the plugins{} then I just get a Plugin ...was not found in any of the following sources which seems odd for something that is in Maven

[Big Chungus]

Most likely that plugin is not published with gradle plugin marker artifact. Another reason could be that it's not in gradlePluginPortal and you need to add its repo into settings.gradle.kts pluginManagement.repositories

[Big Chungus]

Also this groovy block is invalid

plugins {
  id 'application'
  id 'org.jetbrains.kotlin.jvm'
  id 'com.squareup.wire'
}

Since the page there doesn't specify where the version is listed

[Alec Muffett]

so it should be something like: id("com.squareup.wire") version "3.5.0" ?

[Big Chungus]

Here's what you need in build.gradle.kts

plugins {
  application
  kotlin("jvm") version "1.4.10"
  id("com.squareup.wire") version "3.5.0"
}

[Big Chungus]

You might need to swap the order of kotlin and application plugins

[Alec Muffett]

Still fails. I have set the pluginManagement.repositories to include Maven, and it is still not being found.

* What went wrong:
Plugin [id: 'com.squareup.wire', version: '3.5.0'] was not found in any of the following sources:

- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Plugin Repositories (could not resolve plugin artifact 'com.squareup.wire:com.squareup.wire.gradle.plugin:3.5.0')
  Searched in the following repositories:
    Gradle Central Plugin Repository
    MavenRepo

The name at Maven does not match the above; on the website is it given as wire-gradle-plugin with hyphens. On that basis, I tried the following, too:

implementation("com.squareup.wire:wire-gradle-plugin:3.5.0")

...and although that stops the breakage, it does not seem to install the plugin in a usable state; I cannot do wire{} for instance

[Big Chungus]

Try this (in build.gradle.kts at the top, but after plugins block):

buildscript {
  repositories {
    mavenCentral()
    gradlePluginPortal()
  }
  dependencies {
    classpath("com.squareup.wire:wire-gradle-plugin:3.5.0")
  }
}

apply(plugin = "wire-gradle-plugin")

[Big Chungus]

If that doesn't work, try replacing apply line with apply(plugin = "com.squareup.wire:wire-gradle-plugin")

[Big Chungus]

P.S. Plugin docs are very bad 👮

[Alec Muffett]

@Big Chungus - no joy, but I have logged an issue, and hopefully cited you: https://github.com/square/wire/issues/1848

[Alec Muffett]

Thank you greatly for your help, this has been terribly frustrating.

[Big Chungus]

Yes you found my github handle right 😄 I'm at a loss why they've left out repo/version in their docs, though... First time I'm seeing such thing in published stuff.

[Alec Muffett]

It's even a quite popular package; there are several citations in this slack.

[Big Chungus]

Did some search in their repo and this should work for you:

buildscript {
  repositories {
    mavenCentral()
    gradlePluginPortal()
  }
  dependencies {
    classpath("com.squareup.wire:wire-gradle-plugin:3.5.0")
  }
}
apply(plugin = "com.squareup.wire")

[Big Chungus]

Because of this: https://github.com/square/wire/blob/master/wire-library/wire-gradle-plugin/build.gradle#L7

[Big Chungus]

It's not on gradlePluginPortal, sadly

[Big Chungus]

So you do need mavenCentral repo setup

[Big Chungus]

Looks like I was right and

plugins {
  application
  kotlin("jvm") version "1.4.10"
  id("com.squareup.wire") version "3.5.0"
}

Is not gonna work due to the plugin not having plugin marker published

[Big Chungus]

But buildScript way should resolve fine now. Let me know how it goes.

[Alec Muffett]

Plugin [id: 'com.squareup.wire', version: '3.5.0', apply: false] was not found in any of the following sources:

[Alec Muffett]

😕

[Alec Muffett]

ah, wait.

[Alec Muffett]

I forgot to remove the entry from plugin, at first. ..,, it loads but then fails to work. Documented at https://github.com/square/wire/issues/1848#issuecomment-724096310

[Alec Muffett]

<afk tea>

[Alec Muffett]

@Big Chungus thank you for your help with all that 🙂

[Big Chungus]

Np, I take it you've solved it? 🎉

[Alec Muffett]

Yes indeed - there's a simple but inobvious workaround.

[Alec Muffett]

https://github.com/alecmuffett/wire-playground/commit/44033df36647e646c237a40b552336b0131933e3

[Alec Muffett]

hack on resolutionStrategy

[Big Chungus]

I've left a comment on that issue for plugin maintainers on how to publish it properly so they wouldn't need to hack it anymore.