Doesn't work with gradle 2.2

[berinle]

Hi,
I am attempting to update a couple of projects to gradle 2.2, but I get this error when the shadow jar plugin is included. This works fine with gradle 2.1.

Steps to reproduce:

1. gradle init --type java-library
2. edit the build.gradle file and add the shadow jar plugin

plugins {
    id "com.github.johnrengelman.shadow" version "1.1.2"
}
...

3. attempt to build the project gradle build

Error:

 * What went wrong:
A problem occurred evaluating root project 'test-gradle'.
> Failed to apply plugin [id 'java']
   > No signature of method: com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar_Decorated.getManifest() is applicable for argument types: () values: []
     Possible solutions: getManifest(), getManifest(), getManifest(), setManifest(org.gradle.api.java.archives.Manifest), setManifest(org.gradle.api.java.archives.Manifest),     manifest(groovy.lang.Closure) 

Here is a sample test project to test with https://github.com/berinle/test-shadowjar-plugin

Thanks!

[johnrengelman]

Duplicate of #106

[johnrengelman]

Thanks for the sampling project.