Gradle: common resource dependency for multiple java projects

Question

I\'m developing a multi-module project with gradle/intellij-idea, and here is the structure of my project home:

project/
  sub-project-1
    /main/resources
         


        

Answer 1

You need to choose the project which will hold your resources. All the other projects that require those resources, will add them to the resources component of the sourceSets.

sourceSets {
    data {
        resources {
            srcDir "${project(':data').projectDir}/src/main/resources"
            include "your_pattern_here**"
        }
    }
    main {
        resources {
            srcDirs += [ data.resources ]
        }
    }
}

Answer 2

Ok, I figured it out. It's actually pretty simple. Just treat the "data" folder as another project and add dependency declarations to sub projects will do the trick. For example:

dependencies {
    compile project (':data')
    testCompile project (':data')
}

Answer 3

And here is version for Kotlin DSL - to sync all resources from :data module to root and all sub-modules build/resources folders:

// Synchronizing resources from :data module to project root: build/resources
synchronizeSharedResources()

subprojects {
    // Synchronizing resources from :data module to all submodules: build/resources
    synchronizeSharedResources()
}

fun Project.synchronizeSharedResources() {
    sourceSets {
        main {
            resources.srcDir(project(":data").sourceSets["main"].resources.srcDirs)
        }
        test {
            resources.srcDir(project(":data").sourceSets["test"].resources.srcDirs)
        }
    }
}

Answer 4

One solution is to apply the Java plugin also to the data project, and then use regular project dependencies (e.g. dependencies { runtime project(":data") }). However, this would require a bit of effort to prevent shipping the test resources.

Another solution is not to make data a Gradle project but literally include its resource directories in the other two projects (sourceSets.main.resources.srcDir "../data/main/resources"; sourceSets.test.resources.srcDir "../data/test/resources").

Answer 5

The approach I took was to use project reference

sourceSets {
    main {
        resources {
            srcDirs += [
                project(':data').sourceSets.main.resources
            ]
        }
    }
}

Answer 6

sourceSets {
    main {
        resources {
            srcDirs += [
                '../sub-project-1/src/main/resources',
                '../sub-project-2/src/main/resources',
                '../data/src/main/resources'
            ]
        }
    }

    test {
        resources {
            srcDir '../data/src/test/resources'
        }
    }    
}