Grails 3.2.9 custom plugin dependencies - maven

Question

Is it possible to make one custom plugin in Grails 3 dependent on another custom plugin? Here's my project structure:
grails3-home
myApp
customPlugin1
build.gradle
settings.gradle
customPlugin2 ...
I would like to make customPlugin1 dependent on customPlugin2. Everything I've read says this possible with multi-project builds between apps and plugins in Grails 3. And I'm able to declare both plugins as dependencies in myApp with no issues. However, I have not been successful in getting this to work between the two plugins.
I have added the following line to customPlugin1 > settings.gradle
include "customPlugin2"
And to customPlugin1 > build.gradle
grails {
plugins {
compile project(':customPlugin2')
}
}
However when I try to build customPlugin1, I get the following error:
FAILURE: Build failed with an exception.
What went wrong:
A problem occurred configuring root project 'customPlugin1'.
Could not resolve all dependencies for configuration ':runtime'.
Project : declares a dependency from configuration 'compile' to configuration 'default' which is not declared in the descriptor for project :customPlugin2.
Is anyone aware if what I'm trying to do is possible, and if so, what I might be missing?
Update:
If I change my configuration to
include "../customPlugin2"
and
grails {
plugins {
compile project(':../customPlugin2')
}
}
the plugin builds successfully, but I am no longer able to import domains classes from customPlugin2 into customPlugin1 domains classes

Answer 1

You should do the include in the root settings.gradle
include 'myApp', 'customPlugin1', 'customPlugin2'
Then in plugin 1:
grails {
plugins {
compile project(':customPlugin2')
}
}
Note that this simply defines a dependency. If you need plugin 2 to load before or after plugin 1 you need to define that as well in the plugin descriptor.