What's the correct way to install a grails plugin from a zip file?

Question

In recent versions of Grails install-plugin command has been deprecated. What is now the recommended way of installing a plugin that is not available via some repository. As

Answer 1

I think the easiest approach is to place the zip file in the project's lib folder and then add an entry in the BuildConfig.groovy. For example:

1. 'grails-image-tools-1.0.5.zip' placed in lib.
2. runtime ":grails-image-tools:1.0.5" added to BuildConfig.groovy

Since the dependency manager looks inside the project's lib folder as well, I don't have to worry about setting any paths etc.

EDIT: The latest Grails version that I worked on was 2.1.1. I'm unable to check but according to @Saurabh's comment below this isn't applicable for Grails 2.4.3

EDIT2: But @Jay says that it works with 2.4.5