Unable to resolve a plugin using the new plugin mechanism in Gradle - gradle

Question

While trying to upgrade some of our scripts to Gradle 4.0.1 on of the plugins we are using is failing and I thought of fixing that plugin first. The plugin is a third party open source project.
So I have cloned the project and tried to compile it. However it fails with following message:
c:\source\gradle-xld-plugin>gradlew build
FAILURE: Build failed with an exception.
* Where:
Build file 'C:\source\gradle-xld-plugin\build.gradle' line: 2
* What went wrong:
Plugin [id: 'com.gradle.plugin-publish', version: '0.9.7'] was not found in
any of the following sources:
- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- maven(https://artifactory/java-v) (Could not resolve plugin artifact 'com.gradle.plugin-publish:com.gradle.plugin-publish.gradle.plugin:0.9.7')
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --
debug option to get more log output.
BUILD FAILED in 0s
The build.gradle script for the plugin starts like this:
plugins {
id "com.gradle.plugin-publish" version "0.9.7"
id "com.github.hierynomus.license" version "0.11.0"
id 'nebula.nebula-release' version '4.0.1'
id "com.jfrog.bintray" version "1.7.3"
}
In addition to this the company policy dictates we have to go through an internal artifactory server, so following has been added to the settings.gradle file:
pluginManagement {
repositories {
maven {
url "https://artifactory/java-v"
}
}
}
The jar file exists at following location: https://artifactory/java-v/com/gradle/publish/plugin-publish-plugin/0.9.7/plugin-publish-plugin-0.9.7.jar
but when I look at the error message I am a little puzzled that it says that it cannot find com.gradle.plugin-publish:com.gradle.plugin-publish.gradle.plugin:0.9.7.
It seems to have suffixed the id with .gradle.plugin.
Does anyone know whether I am looking at the wrong location or how come it is suffixing the id with .gradle.plugin. And shouldn't it look at a location that has the GAV like this: com.gradle.plugin-publish:com.gradle.plugin-publish:0.9.7?
And does anyone know about how the resolution mechanism for the new plugin mechanism in Gradle works.
Thanks in advance
Edit
Thanks to Mateusz Chrzaszcz I was able to progress.
The only caveat I have with the solution is that it seems like a workaround rather than a solution. But it works!
In addition to his solution you had to resolve the plugins. I was able to hack my way to actually resolve the appropriate names.
In order to do so one has to do as follows:
In a webbrowser go for the plugin: id "com.github.hierynomus.license" version "0.11.0" go to following URL: https://plugins.gradle.org/api/gradle/4.0.1/plugin/use/com.github.hierynomus.license/0.11.0
The json returned contains the GAV needed in the useModule call. Use that
The following serves as an example:
resolutionStrategy {
eachPlugin {
if (requested.id.namespace == 'com.gradle' && requested.id.name == 'plugin-publish') {
useModule('com.gradle.publish:plugin-publish-plugin:0.9.7')
} else if(requested.id.namespace == 'com.github.hierynomus' && requested.id.name == 'license') {
useModule('nl.javadude.gradle.plugins:license-gradle-plugin:0.11.0')
}
}
}

Answer 1

Try to implement Plugin Resolution Rules.
According to gradle documentation:
Plugin resolution rules allow you to modify plugin requests made in plugins {} blocks, e.g. changing the requested version or explicitly specifying the implementation artifact coordinates.
To add resolution rules, use the resolutionStrategy {} inside the pluginManagement {} block
like that:
pluginManagement {
resolutionStrategy {
eachPlugin {
if (requested.id.namespace == 'com.gradle.plugin-publish') {
useModule('com.gradle.plugin-publish:0.9.7') //try a few combinations
}
}
}
repositories {
maven {
url 'https://artifactory/java-v'
}
}
}
Keep in mind this is incubating feature though.