Gradle plugin read configuration - gradle

Question

I write a plugin for Gradle and I need to create dynamic tasks based on my extension configuration.
Example from build.gradle file:
exampleext {
t1 {
}
t2 {
}
}
So I want to create tasks like sometask#t1 and sometask#t2 and so on.
I could not find any info, how could I read this Closure configuration and use it for building these tasks? It's read in tasks only, but I want to use it before executing tasks.
Thanks in advance.

Answer 1

You could use Groovy's dynamic features:
class ExamplePlugin implements Plugin<Project> {
void apply(Project project) {
project.extensions.create("exampleext", ExampleExt, project)
}
}
class ExampleExt {
Project project
ExampleExt(Project project) {
this.project = project
}
def methodMissing(String name, Object args) {
def configClosure = args ? args[0] : {}
project.tasks.create(name: "sometask#$name", type: Copy, configClosure)
}
}
apply plugin: ExamplePlugin
exampleext {
t1 {
from "src/main/java"
into "$buildDir/tmp/main"
}
t2 {
from "src/test/java"
into "$buildDir/tmp/test"
}
}
You can have a look at https://github.com/tschulte/gradle-jnlp-plugin/blob/374360c118e2a7373ee2fa5be7d1b784240bb1aa/gradle-jnlp-plugin/src/main/groovy/de/gliderpilot/gradle/jnlp/war/GradleJnlpWarPluginExtension.groovy, where I allow dynamic task creation plus some more nesting. E.g.
jnlpWar {
versions {
"1.0"('org.example:application:1.0:webstart#zip')
}
}
is made possible by
void versions(Closure closure) {
closure.delegate = new Versions()
closure()
}
private class Versions {
#Override
Object invokeMethod(String name, Object args) {
project.configurations.maybeCreate(name)
return project.dependencies.invokeMethod(name, args)
}
}
However, maybe you should have a look at the incubating gradle model (https://docs.gradle.org/current/userguide/software_model.html).