Gradle 'Unknown Property' : Importing Plugin within my Custom Plugin - gradle

Question

I am writing a custom Plugin that has a task which makes HTTP-API Calls.
Hence within my custom plugin's build.gradle, I have included the below plugins tag
plugins {
id 'java-gradle-plugin'
id 'groovy'
id 'maven-publish'
id 'io.github.http-builder-ng.http-plugin' version '0.1.1'
}
The task within my custom-plugin is this
task makeRESTCall() {
onlyIf {
!inputList.empty
}
doLast {
//println 'Successfully made REST Call'
//println inputList
def http = groovyx.net.http.HttpBuilder.configure {
request.uri = 'http://localhost:8080'
request.contentType = 'application/json'
request.uri.path = '/api/v1/validate'
}
http.post {
request.body = inputList.toString()
response.success {resp, json ->
println json
if (!json) {
throw new GradleException("Validation Failed")
}
}
}
}
}
My custom-plugin gets built property and when i include the custom-plugin in another project and when I execute the task makeRESTCall, i get the below exception
Execution failed for task ':api:makeRESTCall'.
Could not get unknown property 'groovyx' for task ':api:makeRESTCall' of type org.gradle.api.DefaultTask.
the http-plugin that I import within my custom-plugin is not getting imported properly in my Project

Answer 1

In your custom plugin, you are using HTTP-Builder-NG library (groovyx.net.http.HttpBuilder class), so you need to configure a dependency to this library in your plugin project:
dependencies {
compile "io.github.http-builder-ng:http-builder-ng-core:1.0.3"
}
To make a quick test you could create the following temporary plugin in the buildSrc directory of the project you want to apply the plugin to:
buildSrc/build.gradle
dependencies {
compile "io.github.http-builder-ng:http-builder-ng-core:1.0.3"
}
repositories {
mavenCentral()
}
buildSrc/src/main/groovy/com/mycompany/MyPlugin.groovy
package com.mycompany
import org.gradle.api.GradleException
import org.gradle.api.Plugin
import org.gradle.api.Project
class MyPlugin implements Plugin<Project> {
void apply(Project project) {
// ... your plugin login here, with 'inputList' definition
project.task ('makeRESTCall') {
onlyIf {
!inputList.empty
}
doLast {
//println 'Successfully made REST Call'
println inputList
def http = groovyx.net.http.HttpBuilder.configure{
request.uri = 'http://localhost:8080'
request.contentType = 'application/json'
request.uri.path = '/api/v1/validate'
}
http.post {
request.body = inputList.toString()
response.success {resp, json ->
println json
if (!json) {
throw new GradleException("Validation Failed")
}
}
}
}
}
}
build.gradle
import com.mycompany.MyPlugin
apply plugin: MyPlugin
Note : I don't think you need to apply plugin id "io.github.http-builder-ng.http-plugin" version "0.1.1", unless you are using the HTTPTask that this plugin exposes, which is just a Gradle Task wrapper around groovyx.net.http.HttpBuilder