I want to create a maven publication from inside a RuleSource that will be published via the maven-publish
plugin. The artifacts of the publication are the outputs from a series of Zip tasks that are created from rules. When I try to add the artifacts, I get a circular rule exception.
Here is my very simple build.gradle
:
buildscript {
repositories {
mavenCentral()
}
dependencies {
}
}
task wrapper(type: Wrapper) {
gradleVersion = '3.3'
}
apply plugin: 'groovy'
apply plugin: 'testpub'
repositories {
mavenCentral()
}
dependencies {
compile 'org.codehaus.groovy:groovy-all:2.4.7'
}
The testpub
plugin exists in the buildSrc
directory. To be able to apply it as above, it requires the following properties file:
// buildSrc/src/main/resources/META_INF/gradle-plugins/testpub.properties
implementation-class=TestPubPlugin
Here is the very simple plugin file:
import org.gradle.api.Project
import org.gradle.api.Plugin
import org.gradle.model.RuleSource
import org.gradle.api.Task
import org.gradle.model.Mutate
import org.gradle.model.Finalize
import org.gradle.api.tasks.bundling.Zip
import org.gradle.model.ModelMap
import org.gradle.api.publish.PublishingExtension
import org.gradle.api.publish.maven.MavenPublication
class TestPubPlugin implements Plugin<Project> {
void apply(Project project) {
project.configure(project) {
apply plugin: 'maven-publish'
publishing {
repositories {
maven {
url "someUrl"
}
}
}
}
}
static class TestPubPluginRules extends RuleSource {
@Mutate
public void createSomeTasks(final ModelMap<Task> tasks) {
5.times { suffix ->
tasks.create("someTask${suffix}", Zip) {
from "src"
destinationDir(new File("build"))
baseName "someZip${suffix}"
}
}
}
@Mutate
public void configurePublishingPublications(final PublishingExtension publishing, final ModelMap<Task> tasks) {
// Intention is to create a single publication whose artifacts are formed by the `someTaskx` tasks
// where x = [0..4]
publishing {
publications {
mavPub(MavenPublication) {
tasks.matching {it.name.startsWith('someTask')}.each { task ->
artifact(task)
}
}
}
}
}
}
}
The plugin creates a number of tasks called someTaskx
where x=[0..4]
. They simply zip up the src directory. I want to add the output files as artifacts to the single MavenPublication. However, I get the following exception:
* What went wrong:
A problem occurred configuring root project 'testpub'.
> A cycle has been detected in model rule dependencies. References forming the cycle:
tasks
\- TestPubPlugin.TestPubPluginRules#createSomeTasks(ModelMap<Task>)
\- MavenPublishPlugin.Rules#realizePublishingTasks(ModelMap<Task>, PublishingExtension, File)
\- PublishingPlugin.Rules#tasksDependOnProjectPublicationRegistry(ModelMap<Task>, ProjectPublicationRegistry)
\- projectPublicationRegistry
\- PublishingPlugin.Rules#addConfiguredPublicationsToProjectPublicationRegistry(ProjectPublicationRegistry, PublishingExtension, ProjectIdentifier)
\- publishing
\- TestPubPlugin.TestPubPluginRules#configurePublishingPublications(PublishingExtension, ModelMap<Task>)
\- tasks
What is wrong and how do I fix it?