def GRADLE_PROPERTIES_FILENAME = "gradle.properties"

def getFile = { dir, filename ->
    File file = new File("$dir$File.separator$filename")
    file?.exists() ? file : null
}

def getPropertyFile = { dir ->
    return getFile(dir, GRADLE_PROPERTIES_FILENAME)
}

ext.getUserProperties = { dir ->
    def file = getPropertyFile(dir)
    if (!file) {
        return null
    }

    Properties properties = new Properties()
    properties.load(file.newInputStream())

    return properties
}