如何在git历史中grep（搜索）提交的代码？ [英] How to grep (search) committed code in the git history?

问题描述

我过去曾在某个文件中删除过一个文件或一些代码。我可以在内容中grep（不在提交消息中）吗？

I have deleted a file or some code in a file sometime in the past. Can I grep in the content (not in the commit messages)?

一个非常糟糕的解决方案是grep日志：

A very poor solution is to grep the log:

git log -p | grep <pattern>

但是，这并不会立即返回提交散列。我使用了 git grep 无济于事。

However this doesn't return the commit hash straight away. I played around with git grep to no avail.

推荐答案

对于commit content （即实际的源代码行，而不是提交消息等），你需要做的是：

To search for commit content (i.e., actual lines of source, as opposed to commit messages and the like), what you need to do is:

git grep <regexp> $(git rev-list --all)

更新： git rev-list --all | xargs git grep表达式会在你遇到参数列表太长时间错误时工作

Updates: git rev-list --all | xargs git grep expression will work if you run into an "Argument list too long" error

如果你想限制搜索到某个子树（例如lib / util），您需要将它传递给 rev-list 子命令并将 grep 作为< well：

If you want to limit the search to some subtree (for instance "lib/util") you will need to pass that to the rev-list subcommand and grep as well:

git grep <regexp> $(git rev-list --all -- lib/util) -- lib/util

将grep通过所有提交文本的正则表达式。

This will grep through all your commit text for regexp.

在两个命令中传递路径的原因是因为 rev-list 将返回修订列表，其中发生了对 lib / util 的所有更改，但您还需要传递给 grep 以便它只搜索 lib / util 。

The reason for passing the path in both commands is because rev-list will return the revisions list where all the changes to lib/util happened, but also you need to pass to grep so that it will only search on lib/util.

试想下面的情况：<$ c $对于包含在由 rev返回的相同修订中的其他文件，c> grep 可能会找到相同的< regexp> -list （即使该修订版本中没有对该文件进行更改）。

Just imagine the following scenario: grep might find the same <regexp> on other files which are contained in the same revision returned by rev-list (even if there was no change to that file on that revision).

以下是搜索源代码的其他一些有用方法：

Here are some other useful ways of searching your source:

搜索文本匹配正则表达式正则表达式的工作树：

Search working tree for text matching regular expression regexp:

git grep <regexp>

搜索匹配正则表达式regexp1或regexp2的文本行的工作树：

Search working tree for lines of text matching regular expression regexp1 or regexp2:

git grep -e <regexp1> [--or] -e <regexp2>

搜索与正则表达式regexp1和regexp2匹配的文本行的工作树，仅报告文件路径： p>

Search working tree for lines of text matching regular expression regexp1 and regexp2, reporting file paths only:

git grep -e <regexp1> --and -e <regexp2>

搜索具有与正则表达式regexp1匹配的文本行和匹配正则表达式的文本行的文件的工作树regexp2：

Search working tree for files that have lines of text matching regular expression regexp1 and lines of text matching regular expression regexp2:

git grep -l --all-match -e <regexp1> -e <regexp2>

搜索工作树以更改文字匹配模式的行：

Search working tree for changed lines of text matching pattern:

git diff --unified=0 | grep <pattern>

搜索文本匹配正则表达式正则表达式的所有修订版本：

Search all revisions for text matching regular expression regexp:

git grep <regexp> $(git rev-list --all)

搜索rev1和rev2之间的所有版本表达式正则表达式：

Search all revisions between rev1 and rev2 for text matching regular expression regexp:

git grep <regexp> $(git rev-list <rev1>..<rev2>)

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