Custom signingConfigs from file

gistfile1.txt

signingConfigs {
    debug {
        // No debug config
    }
    release {
        def filePrivateProperties = file("../releaseSigningConfig.properties")
        if (filePrivateProperties.exists()) {
            Properties propsPrivate = new Properties()
            propsPrivate.load(new FileInputStream(filePrivateProperties))

            storeFile file(propsPrivate['key.store'])
            keyAlias propsPrivate['key.alias']
            storePassword propsPrivate['key.store.password']
            keyPassword propsPrivate['key.alias.password']
        }
    }
}