git - 索引如何影响 "git diff"的输出？

Question

索引是暂存区吧？

来自 git 文档:

git diff

Let’s stop for a minute to see how the git diff command can be used to show you the difference between the version of a file in the working directory, index and most recent commit. The 3 main types of git diff commands you would likely use are:

git diff: Show differences between your working directory and the index.
git diff –cached: Show differences between the index and the most recent commit.
git diff HEAD: Show the differences between your working directory and the most recent commit.

我的问题是关于 git diff 的。问题是我还没有提交任何内容或 git add 任何内容，当我输入 git diff 时，会显示我的工作目录中的更改。我的暂存区是空的。当我输入 git status 时，我看到两个红色文件，因为我还没有使用 git add，所以它们不会被暂存。那么，为什么 git diff 会显示我在工作目录中所做的更改？

Answer 1

git diff: Show differences between your working directory and the index.

工作目录:您当前的代码，甚至是尚未暂存的文件。

Index:你没看错，这里是暂存区。

当您执行 git diff 时，它会将您当前的代码与暂存区进行比较，这正是您所描述的行为。

来自 git 文档:

git diff

This form is to view the changes you made relative to the index (staging area for the next commit). In other words, the differences are what you could tell Git to further add to the index but you still haven’t. You can stage these changes by using git-add[1].

所以，我们有 3 种不同的情况:

1 - 您没有未暂存的更改 -> git diff 不显示任何内容。

2 - 您有一些更改已暂存，一些未暂存 -> git diff 显示您的 CWD 和暂存区域之间的差异。

3 - Stage area empty, some changes -> git diff 显示 CWD 和上次提交之间的差异。