How to set up a multiproject Grails using Gradle?

Question

I am trying to set up a gradle build script for a multiproject grails application. I have used the grails-gradle plugin and got it up and running to create a new application.

However, I have some problems when I want to convert an existing grails multiproject application to use gradle.

I have declared all subprojects in my settings.gradle file as follows:

include 'core',

        //Plugins
        'plugin1',
        'plugin2'

and for each subproject set up its dependencies in their own build.gradle files. e.g. plugin1 is dependent on plugin2 so I have declared the following in plugin1's build.gradle file:

dependencies {
  compile project(':plugin2')
}

However, I got the following error when I try to run the gradle test command:

UNRESOLVED DEPENDENCIES

What went wrong:
Execution failed for task ':plugin1:test'.
Cause: Could not resolve all dependencies for configuration ':plugin1:runtime':
- unresolved dependency: {}#plugin2;1.5-SNAPSHOT: configuration not found in {}#plugin2;1.5-SNAPSHOT: 'default'. It was required from {}#plugin1;1.5-SNAPSHOT compile

My question is then, How do I set up the subproject dependencies in gradle?

I have declared them in each subprojects BuildConfig.groovy as inline dependencies, do I have to declare them in gradle as well?

The 'grails' plugin is added to the subproject through a subprojects closure in the main build file. Stacktrace can be viewed here: Stacktrace — Mathias Åhsberg

Mathias Åhsberg Mathias Åhsberg · Accepted Answer · 2011-07-28T12:27:03

I answer my own question If anyone else have the same issue.

I wanted to set the build order for a multiproject grails application (A main application that was dependent on several grails-plugins located in separate folders).

I ended up by declaring a dependsOn() in each subproject buildfile.

Example: My main application is dependent on pluginA and pluginB. PluginB is dependent on PluginC

In my root build.gradle I declared:

dependsOnChildren()

and in my root settings.gradle I declared:

include "pluginA","pluginB","pluginC"

In pluginB:s build.gradle file I declared

dependsOn(":pluginC")

That solved my issue. However it also introduced another issue that the the tests for each plugin were compiled but not executed.

I found a solution for this @ GRAILS-7296

I created a _Events.groovy file in the scripts folder for each subproject and included:

// Override to workaround GRAILS-7296
org.codehaus.groovy.grails.test.support.GrailsTestTypeSupport.metaClass.getSourceDir = { ->
    new File(delegate.buildBinding.grailsSettings.testSourceDir, delegate.relativeSourcePath)
}

This solved all my problems and I have now a multiproject-grails application that uses Gradle for the build.

How to set up a multiproject Grails using Gradle?

2 Answers