copyDeps.gradle

/**
 * Taken from https://gist.github.com/n-belokopytov/d44949590748b096c1a497008b761d04
 */
android.libraryVariants.all { variant ->
    task "copyDependencies${variant.name.capitalize()}"() {
        outputs.upToDateWhen { false }
        doLast {
            println "Executing copyDependencies${variant.name.capitalize()}"
            variant.getCompileClasspath().each { fileDependency ->
                def sourcePath = fileDependency.absolutePath
                def destinationPath = project.projectDir.path + "/build/dependencies/${variant.name}/"
                println "Copying dependency:"
                println sourcePath

                //The monstrous regex that gets the name of the lib from it’s exploded .aar path
                def dependencyName
                if (sourcePath.contains("classes.jar")) {
                    def dependencyAarNameRegexResult = (sourcePath =~ /.*\/(.*)\.aar\/.*\/jars\/classes\.jar/)
                    if (dependencyAarNameRegexResult.size() > 0) {
                        dependencyName = dependencyAarNameRegexResult[0][1]
                        println "Exploded AAR found : ${dependencyName}"
                    }
                } else {
                    def dependencyJarNameRegexResult = (sourcePath =~ /.*\/caches\/[^\/]+\/[^\/]+\/(.*)\/.*\/.*\.jar/)
                    if (dependencyJarNameRegexResult.size() > 0) {
                        dependencyName = (dependencyJarNameRegexResult[0][1]).replace("/","-")
                        println "Jar found : ${dependencyName}"
                    }
                }


                copy {
                    from sourcePath
                    into destinationPath

                    rename { String filename ->
                        if (filename.contains(".jar") && dependencyName != null) {
                            dependencyName = "${dependencyName}.jar"
                            println "Renaming dependency file to : ${dependencyName}"
                            return dependencyName
                        }
                        return filename
                    }
                }
            }
        }
    }
}