Hello everyone, I've recently made a library in pure Kotlin/Native and would like to release it. But...

# kotlin-native

[axeon]

Hello everyone, I've recently made a library in pure Kotlin/Native and would like to release it. But when I call gradle publish, only a .jar file gets published. Afaik, it's necessary to include a .klib as well for it to be used in other Native projects, and the problem is that publishing does not generate/upload that .klib file.

Build file:
https://github.com/reblast/KPresence/blob/master/build.gradle.kts

[Michael Paus]

Have you tried publishToMavenLocal for example? This generates all the jars and klibs for all targets I need.

[Adam S]

hi 👋

When debugging publishing I find it's helpful to add a project-local repository.

publishing {
  repositories {
    maven(file("build/dev-maven")) {
      name = "DevMaven"
    }
}

Then you can run gradle publishAllToDevMaven and check the directory. It's nicer because you can view the files in IJ rather than digging through ~/.m2, and you can more easily delete & retry.

[axeon]

Running publishToMavenLocal did generate the klib files.

[axeon]

And after that I ran publish but faced an error, seems like its not creating separate packages for each target:

[Adam S]

ahh I see, you're manually specifying the GAV for the Maven POM

https://github.com/reblast/KPresence/blob/72cc3ebbd9e08b1eabafb4518b56e80180bcf8c7/build.gradle.kts#L101-L103

publications {
        withType<MavenPublication> {
            artifact(javadocJar)
            
            pom {
                groupId = "me.blast"
                artifactId = "kpresence"
                version = project.version.toString()

[Adam S]

Kotlin needs to set the artifact ID for each variant, so you'll end up with me.blast:kpresence-macos:1.2.3, me.blast:kpresence-linux:1.2.3, me.blast:kpresence-mingw:1.2.3, etc

[Adam S]

so, remove manually specifying those in the POM, and instead, either set the group and version in build.gradle.kts

project.version = "1.2.3"
project.group = "me.blast"

Or in gradle.properties

version=1.2.3
group=me.blast

And Gradle will automatically pick those up, and use them for the Maven publications

[axeon]

whoops, got it

[axeon]

let me try again

[Adam S]

you're already setting the group and version in build.gradle.kts https://github.com/reblast/KPresence/blob/72cc3ebbd9e08b1eabafb4518b56e80180bcf8c7/build.gradle.kts#L13-L14, so you can just remove the manual override from the MavenPublications :)

[axeon]

thanks! seems to be working now

[axeon]

although, i got this warning for all targets, is this okay?

[Adam S]

ah yeah, that warning

You can try this workaround https://github.com/gradle/gradle/issues/26091#issuecomment-1722947958

[axeon]

that did the job, thanks once again

[axeon]

by the way, has anyone got any experience with publishing to sonatype? github packages does not seem to be a reliable option since it requires authentication for others to be able to use.

[axeon]

i couldnt understand anything from the docs, does it require any more additional steps other than creating a namespace?

maven {
            name = "OSS"
            val releasesRepoUrl = uri("<https://oss.sonatype.org/service/local/staging/deployByRepositoryId/${project.findProperty(>"sonatype.repository")}/")
            val snapshotsRepoUrl = uri("<https://oss.sonatype.org/content/repositories/snapshots/>")
            url = if (version.toString().endsWith("SNAPSHOT")) snapshotsRepoUrl else releasesRepoUrl

            credentials {
                username = project.findProperty("sonatype.username") as String? ?: System.getenv("SONATYPE_USERNAME")
                password = project.findProperty("sonatype.password") as String? ?: System.getenv("SONATYPE_PASSWORD")
            }
        }

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':publishKotlinMultiplatformPublicationToOSSRepository'.
Failed to publish publication 'kotlinMultiplatform' to repository 'OSS'
   > Could not PUT '<https://oss.sonatype.org/service/local/staging/deployByRepositoryId/kpresence/io/github/reblast/kpresence/0.2.1/kpresence-0.2.1.jar>'. Received status code 401 from server: Unauthorized

[axeon]

should i use maven2 instead of deployByRepositoryId? is there any difference?

[Adam S]

publishing to Maven Central is, indeed, difficult :( Although they did completely change their upload process recently, so maybe it's improved.

[Adam S]

I believe that the new way of publishing to Maven Central isn't compatible with the standard maven-publish plugin.

[axeon]

oh i see, is it the same with sonatype snapshots?

[axeon]

i was looking for a free public repository hosting with klib support

[Adam S]

some community plugins are listed here https://central.sonatype.org/publish/publish-portal-gradle/

[Adam S]

I'd try this one https://github.com/vanniktech/gradle-maven-publish-plugin

[axeon]

thank you Adam :)

[Adam S]

Amazing! Well done!

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