Script to print info for all plugins applied to a given project

pluginInfo-task.gradle

import java.nio.file.FileSystem
import java.nio.file.FileSystems
import java.nio.file.FileVisitResult
import java.nio.file.Files
import java.nio.file.Path
import java.nio.file.Paths
import java.nio.file.SimpleFileVisitor
import java.nio.file.attribute.BasicFileAttributes

allprojects {
	task pluginInfo

	pluginInfo {
		doLast {
			def appliedClasses = []
			def classesIds = [:]
			Set classpath = []

			plugins.each {
				appliedClasses << it.class.name
				it.class.classLoader.getURLs().each { classpath.add(it)}
				def jarUrl = it.class.protectionDomain.codeSource.location
				
				if (jarUrl == null) {
					println "WARNING: no codeSource location found for class: " + it.class.name
					
					return
				}
				
				def pluginPath = Paths.get(jarUrl.toURI())
				def pluginUri = URI.create("jar:" + pluginPath.toUri())

				def jarFs

				try {
					jarFs = FileSystems.getFileSystem(pluginUri)
				}
				catch (Throwable t) {
				}

				if (jarFs == null) {
					jarFs = FileSystems.newFileSystem(pluginUri, Collections.emptyMap())
				}

				def gradlePlugins = jarFs.getPath("/META-INF/gradle-plugins")

				Files.walkFileTree(gradlePlugins, new SimpleFileVisitor<Path>() {
						@Override
						public FileVisitResult visitFile(Path path, BasicFileAttributes attrs) throws IOException {
							if (path.toString().endsWith(".properties")) {
								Properties properties = new Properties()
								properties.load(jarFs.provider.newInputStream(path))

								String implClass = properties.get("implementation-class")

								if (implClass != null) {
									classesIds.put(implClass, path.fileName.toString().replaceAll(".properties\$",""))
								}
							}

							return FileVisitResult.CONTINUE;
						}
					});
			}

			println "Plugin classpath..."

			classpath.each { println it }

			println "Applied ids..."

			def appliedIds = classesIds.findAll { appliedClasses.contains(it.key) }

			appliedIds.each { println "$it.value = $it.key" }

			println "\nTotal plugins applied = ${appliedIds.size()}"
		}
	}
}