从defaultConfig中看不到Gradle项目配置

Question

我试图在BuildConfig.java中列出我的所有Android Gradle项目的实际依赖项（请参阅How to determine during the build which exactly version of dependency is used）。为此，我使用类似的代码：

def getProjectAndBuildscriptDependencies() {
    project.allprojects.collectMany{ proj ->
        def configurations = (proj.configurations + proj.buildscript.configurations)
        configurations.collectMany { it.allDependencies }
    }.findAll { it instanceof ExternalDependency }
}

private def resolveActualDependencyVersion(Dependency dependency) {
    def version = dependency.version
    boolean mightBeDynamicVersion = version != null && (version.endsWith('+') || version.endsWith(']') || version.endsWith(')') || version.startsWith('latest.'))
    if (!mightBeDynamicVersion){
        return version
    }

    def actualVersion = resolveWithAllRepositories{
        project.configurations.detachedConfiguration(dependency).resolvedConfiguration.lenientConfiguration
            .getFirstLevelModuleDependencies(org.gradle.api.specs.Specs.SATISFIES_ALL).find()?.moduleVersion ?: version
    }
    return actualVersion
}

这个函数应该收集我拥有的所有依赖项。如果我从某个任务中调用它，它会执行以下操作：

task printCurrentDependencies << {
    def current = getProjectAndBuildscriptDependencies()

    def currentVersions = [:]
    current.each { dependency ->
        def actualVersion = resolveActualDependencyVersion(dependency)
        currentVersions.put(keyOf(dependency), actualVersion)
    }
}

因此currentVersions包含所有依赖项及其实际版本。

但是当我从defaultConfig android部分调用它时，它只给了我一个依赖，这就是Gradle本身。

android {
    defaultConfig {        
        buildConfigField "int", "depsCount", getProjectDependencies().size().toString()
    }
}

这种行为上的差异使我感到困惑。为什么会这样，以及如何解决它并实现我真正想要的东西？