git diff和gif diff-index有什么区别 [英] What's the difference between git diff and gif diff-index

问题描述

当我想获取git diff文件时，发现有人在使用

When I want to get git diff files, I found someone use

git diff-index --cached  --diff-filter=AM --name-only  HEAD

如果我使用

git diff --cached --diff-filter=AM --name-only  HEAD 

可以获得相同的结果. 那么git diff和git diff-index有什么区别? 什么时候必须使用git diff-index而不是git diff?

can get the same result. So what's the difference between git diff and git diff-index? When you must use git diff-index but not git diff?

推荐答案

git diff-index 是与索引或工作树的差异:

git diff-index is a diff against the index or working tree:

将在树对象中找到的斑点的内容和模式与工作树中的相应跟踪文件或索引中的相应路径进行比较

Compares the content and mode of the blobs found in a tree object with the corresponding tracked files in the working tree, or with the corresponding paths in the index

git diff 功能更全面，可以比较两个文件或两次提交，或(像diff-index一样)一棵树和索引.

git diff is more versatile and can compare two files, or two commits, or (like diff-index) a tree and the index.

在您的情况下，diff HEAD确实会将HEAD与索引进行比较，而diff-index也会这样做.

In your case, a diff HEAD would indeed diff HEAD against the index, which diff-index does too.

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