为什么Git使用冒号（：< branch>）来删除远程分支 [英] Why Git use the colon (:<branch>) to delete remote branch

问题描述

我在考虑为什么Git命令使用

git push< remote> ：< branch>
像
git push origin：featureA 删除远程服务器中的featureA分支。我很感兴趣，为什么把冒号作为删除标志。它与

git branch -d

为什么不做类似于

git branch -d --remote origin< branchname>


还是有我以前从不知道的冒号符号的深层含义？


解决方案

它本身不是：的含义，而是存在的或在它之前缺少的。

refspec格式为

  +< source>：< destination> 
  

（可选+用于非快进）

所以，当你做一些类似于 git push origin：featureA 的东西时，你需要指定一个空的源代码，并且基本上将目标设置为空白或删除它。

PS：请注意，：的refspec或没有任何意思，但并不意味着什么也不是。它使得git推送匹配分支：对于本地存在的每个分支，如果远程端已经存在相同名称的分支，则更新远程端。

I am thinking about why the Git command use

git push <remote> :<branch> like git push origin :featureA to delete featureA branch in the remote server. I am interest that why make the colon as the delete flag. It is so difference from

git branch -d <localbranch>

Why don't make something like

git branch -d --remote origin <branchname>

or there are deep meaning of colon symbol that I never know before?

解决方案

It is not the meaning of the : per se, but what is present, or rather absent before it.

The refspec format is

<+><source>:<destination>

(optional + for non-fast forward)

So when you do something like git push origin :featureA, you are specifying an empty source ref and basically making the destination "empty" or deleting it.

PS: Note that the refspec of : or nothing doesn't mean push nothing to nothing however. It makes git to push "matching" branches: for every branch that exists on the local side, the remote side is updated if a branch of the same name already exists on the remote side.

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