SoftwareComponentInternal with name 'java' not found.

[GuilhE]

This is my setup:

Module: checks (java-library)
Module: styling-lint (android-library) which works like a bridge between checks and projects who implements styling-lint:

apply plugin: 'com.android.library'
apply from: rootProject.file('deploy-bintray.gradle.kts')
android {...}
dependencies { lintPublish project(':checks') }

deploy-bintray.gradle.kts it's my bintray/maven publications script. You can find the code here.

I'm having problems generating .jar files:

val sourcesJar by tasks.registering(Jar::class) {
    archiveClassifier.set("sources")
    from(project.the<SourceSetContainer>()["main"].allSource)
}

publications {
        create<MavenPublication>(bintrayRepo) {
            groupId = publishedGroupId
            artifactId = artifact
            version = libraryVersion

            from(components["java"])
            artifact(sourcesJar.get())
            artifact(dokkaJar.get())
            ...
            }
        }
    }

it fails with:

SoftwareComponentInternal with name 'java' not found.

or, if I comment from(components["java"]) it fails with:

SourceSet with name 'main' not found.

If I add java plugin:

The 'java' plugin has been applied, but it is not compatible with the
Android plugins.

So I'm stuck here.
I believe the problem with the sources it's related to the fact that the android-library module has no code and it only imports the checks module by lintPublish project(':checks') }. This setup is desired because I want the lint jar created by checks to be "auto-imported" when other projects depend (implementation) on styling-lint project.

How can I solve this?

[GuilhE]

I've made some improvements. Regarding sourcesJar I've moved that function to the module build.gradle.kts and changed it to from(android.sourceSets.getByName("main").java.srcDirs) so the build.gradle became:

plugins {
    id("com.android.library")
}

android {
    compileSdkVersion(AndroidConstants.compileSdkVersions)

    defaultConfig {
        minSdkVersion(AndroidConstants.minSdkVersion)
        targetSdkVersion(AndroidConstants.targetSdkVersion)
    }

    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
}

dependencies {
    /** Package the given lint checks library into this AAR  */
    lintPublish(project(":checks"))
}

val sourcesJar by tasks.registering(Jar::class) {
    archiveClassifier.set("sources")
    from(android.sourceSets.getByName("main").java.srcDirs)
}

apply(from = rootProject.file("deploy-bintray.gradle.kts"))

This was the only way I found to avoid:

SourceSet with name 'main' not found.

Is it correct?

Next, I've updated deploy-bintray.gradle.kts to:

publications {
       create<MavenPublication>(bintrayRepo) {
           groupId = publishedGroupId
           artifactId = artifact
           version = libraryVersion

           from(components["java"])
//            artifact(sourcesJar.get())
           artifact(tasks.findByName("sourcesJar"))
           artifact(dokkaJar.get())

Unfortunately from(components["java"]) still fails...

[GuilhE]

The problem was not related to lintPublish configuration.

I finally found a solution!
I was doing a few things wrong, first, both dokkaJar and sourceJar tasks have to be in the main build.gradle and not inside deploy-bintray.gradle.kts. Moving them made it work and fixes:

SourceSet with name 'main' not found.

Secondly we cannot use from(components["java"]) because this is an Android lib so I've replaced that line with artifact("$buildDir/outputs/aar/${artifactId}-release.aar").

Last but not least, as stated here (step 7):

"Also, the POM file generated does not include the dependency chain so
it must be explicitly added..."

I had to add this:

pom {
...
    withXml {
       val dependenciesNode = asNode().appendNode("dependencies")
       configurations.getByName("implementation") {
         dependencies.forEach {
            val dependencyNode = dependenciesNode.appendNode("dependency")
            dependencyNode.appendNode("groupId", it.group)
            dependencyNode.appendNode("artifactId", it.name)
            dependencyNode.appendNode("version", it.version)
         }
       }     
    }       
}