Use gradle plugin in parent project's buildSrc

Question

How can a subproject in a multiproject Gradle build use a Gradle plugin that's defined in the root project's buildSrc folder?

I've basically got:

• settings.gradle
• buildSrc/src/main/groovy/com/example/conventions/JavaConventionsPlugin.groovy
• buildSrc/build.gradle
• common/build.gradle

and I'm trying to apply the plugin in the common project:

apply plugin: 'com.example.conventions.JavaConventionsPlugin'

but it says

Plugin with id 'com.example.conventions.JavaConventionsPlugin' not found.

Answer 1

Looks like the plugin layout is different in buildSrc and I should have been following this example: https://docs.gradle.org/current/samples/sample_convention_plugins.html

• buildSrc/build.gradle
• buildSrc/settings.gradle
• buildSrc/src/main/groovy/example.java-conventions.gradle
• buildSrc/src/main/groovy/com/example/conventions/JavaConventionsPlugin.groovy

and applying using:

plugins {
    id 'example.java-conventions'
}