我无法克隆git树 [英] I cannot clone git tree

问题描述

我对git有疑问，我试图克隆一棵树，但没有成功.

I have a question about git, I tried to clone a tree but without success.

git clone https://github.com/cer/event-sourcing-examples/tree/d2077e21aa677a00095f90250470ff011c132ab8/java-spring

我克隆了项目

git clone https://github.com/cer/event-sourcing-examples

我试图切换到那棵树，但没有效果

and I tried to switch to that tree but no effect

您有什么建议吗?

最诚挚的问候

推荐答案

Git无法直接克隆树.您需要克隆整个存储库，然后签出使用所需树的提交.不过，为了减少混乱，请注意，树"和提交"之间有区别，

Git cannot clone a tree directly. You need to clone the entire repository, and then check out a commit that uses the tree you want. For the sake of reducing confusions, though, do note that there is a difference between the terms "tree" and "commit", though:

• 树是代表目录的Git对象，并包含指向Blob(文件)和其他树的链接.树不一定是存储库的根目录.
• 提交对象包含到存储库的 root 树的链接，以及一些其他信息，例如提交消息，日期和其他标头.

• A tree is a Git object representing a directory, and contains links to blobs (files) and other trees. A tree is not necessarily the root directory of the repository.
• A commit object contains a link to the root tree of the repository, and some extra information such as commit message, dates and other headers.

您只能检出提交.很少有Git命令直接处理树对象(git cat-file和git ls-tree是例外).但是，GitHub URL中的对象ID确实是提交的ID，所以这不是问题.

You can only check out commits. Few Git commands deal directly with tree objects (git cat-file and git ls-tree being among the exceptions). However, the object ID in your GitHub URL is indeed the ID of a commit, so that's not a problem.

然后，您可以做的就是在克隆存储库之后将想要的提交检入新分支:

What you can do, then, is check out the commit you want into a new branch after you've cloned the repository:

git checkout -b test-branch d2077e21

如果您要解决的问题只是从远程存储库中获取单个提交(或树)，那么您就不走运了，因为Git的远程协议不支持该操作.如果有的话，如果您可以在所需的提交中将分支插入远程存储库，则可以直接克隆该分支，而无需任何历史记录:

If the problem you're trying to solve is just fetching a single commit (or tree) from a remote repository, then you're out of luck, because Git's remote protocol does not support that operation. If anything, if you can insert a branch into the remote repository at the commit you want, you can clone that branch directly, without any history:

git clone -b test-branch --depth 1 https://github.com/cer/event-sourcing-examples

但是，如果您不能做到这一点，那么您仍然不走运.远程协议仅允许引用命名的ref，而不是任意提交.

If you can't do that, however, then you're still out of luck. The remote protocol only allows referencing named refs, not arbitrary commits.

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