I've made my Gradle `sourceDirs` task more rubust....

# kobalt

[hastebrot]

I've made my Gradle sourceDirs task more rubust. one problem was, that project.sourceSets is only available for projects that have applied the java or kotlin plugin. I have a rootProject that only applied the base plugin. also confusing is, that the task closure contains a delegated sourceSets variable (IDEA knows about this variable; I think it is hardcoded into the IDEA Gradle plugin). This delegated sourceSets variable is equivalent to project.sourceSets.

allprojects { project ->
    // task to list main and test source directories.
    task("sourceDirs", group: "help").doLast {
        // ignore source directories for projects without source sets.
        if (!project.hasProperty("sourceSets")) { return }

        //def sourceSets = project.sourceSets as SourceSetContainer
        def sourceDirs = sourceSets*.allSource.srcDirs.flatten() as List<File>
        sourceDirs.each { println(it) }
    }
}