你需要创建一个分支来检出特定的git修订版吗？ [英] Do you need to create a branch to check out a specific git revision?

问题描述

我想要做的一件事是将我的工作副本恢复到特定版本，进行一些测试，然后将其恢复到我当前主人的头上。在过去，我天真地做了一个混帐检查哈希只是为了失去我的头。自从我学会了我可以创建一个分支并检查出来，然后切换回来并删除分支，但感觉像是进行简单检查的步骤太多了。在SVN的说法中，有没有办法快速恢复，然后迅速回到git的trunk端？

编辑：我想我的困惑源于这样一个事实：当我签出一个散列并且然后签入git日志时，我看不到在签出散列之后发生的变化（当你想到它时这是合理的）。但接受的答案是正确的; git checkout branch会将头部恢复到前一分支。

解决方案

假设你已经在一个分支上（你总是应该为你想要保留的变更），你可以做

  git checkout<修改以检出>> 
  

这将带您离开您正在研究的主题分支（无分支），其中工作副本直接指向提交ID而不是正常的分支名称。

然后返回，简单地说：

  git checkout<旧分行名称> 
  

一个有用的方法是：git checkout永远不会改变分支;它只是改变你的工作副本当前正在查看的东西（即HEAD），它可能是一个分支（在这种情况下，提交会更新分支）或随机提交哈希。

因此，只要您想保留的更改位于分支上，您就不必担心git checkout会丢失它们。

A common thing I'd like to do is revert my working copy to a particular revision, do some testing, and then bring it back to the head of my current master. In the past I have naively done a "git checkout hash" only to lose my head. I've since learned I can create a branch and check that out, switch back and delete the branch, but it feels like too many steps for a simple check. In SVN parlance, is there a way to quickly revert and then quickly go back to the tip of trunk in git?

Edit: I think my confusion stems from the fact that when I checkout a hash and then git log, I don't see the changes that happened after the checked out hash (which is reasonable, when you think of it). But the accepted answer is correct; "git checkout branch" will restore the head to the previous branch.

解决方案

Assuming you're already on a branch (which you always should be for changes you want to keep), you can just do

git checkout <revision to check out>

This will take you off the topic branch you were working on into (no branch), in which the working copy refers directly to a commit ID rather than a branch name as normal.

Then to move back, simply:

git checkout <old branch name>

A helpful way to think of it is this: git checkout never alters branches; it merely changes what your working copy is currently looking at (ie, HEAD), which might either be a branch (in which case commits will update the branch) or a random commit hash.

As such, as long as the changes you want to keep are on a branch, you don't have to worry about git checkout losing them.

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