Cloning in Industrial Practice - CLIP

我们希望调查在大型、长期存在的工业软件系统中，例如由CA开发或购买的那些系统中，代码克隆和代码分叉是否是相当常见的实践，正如已经确定的那样，在开放源码系统中是这样的。我们建议使用CA拥有的一个或多个系统作为本研究的案例研究。在此专有软件中检测到的代码克隆，然后需要根据它被引入系统的原因以及这种有意或无意的代码克隆的软件工程优点进行分类。在开发了一种分类方法来对商业系统中产生代码克隆的不同方式进行分类之后，我们希望扩展和增强我们开发的现有工具，当大型软件系统出现时，这些工具执行对这些系统内的代码复制程度的评估，以及这种复制的优点。我们还希望开发工具，自动减少源代码，以便删除克隆代码，而不会在克隆代码被认为不受欢迎的情况下改变该代码的外部行为。

We wish to investigate if in large, long-lived industrial software systems, such as those developed or purchased by CA, code cloning, and code forking is a fairly common practice, as has already determined is the case in open source systems. We propose to use one or more systems owned by CA as case studies for this research. The code cloning that is detected in this proprietary software, then needs to be categorized according to why it was introduced into the system, and on the software engineering merits of this deliberate or unintentional code cloning. Having developed a taxonomy to classify the different ways in which code cloning arises in commercial systems, we then wish to extend and enhance existing tools developed by us, that when presented with large software systems perform an assessment of the degree of code duplication within these systems, and the merits of that duplication. We also wish to develop tools that automate the reduction of source code, so as to remove cloned code, without altering the external behaviour of that code when this cloned code is deemed to be undesirable.