如何在Git历史记录中grep（搜索）已提交的代码 [英] How to grep (search) committed code in the Git history

问题描述

我过去某个时候已经删除了文件或文件中的某些代码。我可以在内容中添加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)?

一个非常差的解决方案是grep日志：

A very poor solution is to grep the log:

git log -p | grep <pattern>

但是，这不会立即返回提交哈希。我玩了 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

进行搜索对于提交内容（即，实际的源代码行，而不是提交消息等），您需要执行以下操作：

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

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

git rev-list- -all |如果遇到参数列表过长错误，xargs git grep<表达式> 将起作用。

如果要限制搜索到某个子树（例如 lib / util），则需要将其传递给 rev-list 子命令和 grep ：

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

此将会遍历 regexp 的所有提交文本。

This will grep through all your commit text for regexp.

在两个命令中传递路径的原因是 rev-list 将返回修订列表，其中对 lib / util 的所有更改都已发生，但是您还需要传递给 grep ，以便仅在 lib / util 中搜索。

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 in lib/util.

试想一下以下情况： grep 可能在包含的其他文件上找到相同的® regexp> rev-list 返回的同一修订版中（即使该修订版对该文件没有更改）。

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).

以下是搜索来源的其他有用方法：

Here are some other useful ways of searching your source:

在工作树中搜索与正则表达式regexp匹配的文本：

Search working tree for text matching regular expression regexp:

git grep <regexp>

在工作树中搜索与正则表达式regexp1或regexp2匹配的文本行：

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

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

在工作树中搜索与正则表达式regexp1和regexp2匹配的文本行，仅报告文件路径：

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

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

在工作树中搜索文本匹配正则表达式regexp1和文本匹配正则表达式的文件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>

在工作树中搜索已更改的文本匹配模式行：

Search working tree for changed lines of text matching pattern:

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

在所有修订中搜索与正则表达式regexp匹配的文本：

Search all revisions for text matching regular expression regexp:

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

在rev1和rev2之间的所有修订中搜索常规文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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