Git - 如何查看方法/函数的更改历史记录？ [英] Git - how do I view the change history of a method/function?

问题描述

所以我发现了如何查看文件的变化历史的问题，但是这个特定文件的变化历史是巨大的，我真的只对特定方法的变化感兴趣。那么是否有可能只查看特定方法的更改历史记录？

我知道这需要git来分析代码，并且分析结果会因不同而有所不同语言，但方法/函数声明在大多数语言中看起来非常相似，所以我想也许有人已经实现了这个功能。

我目前使用的语言是Objective- C和我目前使用的SCM是git，但我很想知道这个功能是否适用于任何SCM /语言。

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最近版本的 git log 已学习 -L 参数的特殊形式：

-L： < funcname>：< file>

跟踪由< start>，<< （或函数名正则表达式< funcname> ）的结尾> <文件> 。您不可以提供任何路径限制器。这目前仅限于从单个修订开始，也就是说，您可能只给出零个或一个正面修订参数。您可以多次指定此选项。

...

如果：< funcname> < start> 和< end> 的位置，它是一个正则表达式，表示从第一个与< funcname> 匹配的funcname行，直到下一个funcname行。 ：< funcname>从前一个 -L 范围的末尾搜索（如果有的话），否则从文件开始。 ^：< funcname>从文件开始的搜索。

换句话说：如果你要求Git git log -L：myfunction：path / to / myfile.c ，它现在会很高兴地打印出该函数的变化历史记录。

So I found the question about how to view the change history of a file, but the change history of this particular file is huge and I'm really only interested in the changes of a particular method. So would it be possible to see the change history for just that particular method?

I know this would require git to analyze the code and that the analysis would be different for different languages, but method/function declarations look very similar in most languages, so I thought maybe someone has implemented this feature.

The language I'm currently working with is Objective-C and the SCM I'm currently using is git, but I would be interested to know if this feature exists for any SCM/language.

解决方案

Recent versions of git log learned a special form of the -L parameter:

-L :<funcname>:<file>

Trace the evolution of the line range given by "<start>,<end>" (or the function name regex <funcname>) within the <file>. You may not give any pathspec limiters. This is currently limited to a walk starting from a single revision, i.e., you may only give zero or one positive revision arguments. You can specify this option more than once.
...
If ":<funcname>" is given in place of <start> and <end>, it is a regular expression that denotes the range from the first funcname line that matches <funcname>, up to the next funcname line. ":<funcname>" searches from the end of the previous -L range, if any, otherwise from the start of file. "^:<funcname>" searches from the start of file.

In other words: if you ask Git to git log -L :myfunction:path/to/myfile.c, it will now happily print the change history of that function.

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