为什么 Git 使用冒号(: < Branch >)来删除远程分支？

Git 为什么使用

git push <remote> :<branch>

就是

git push origin :featureA

从远程服务器中删除分支 featureA？

我感兴趣的是为什么使用冒号作为删除标志。

和 git branch -d <localbranch>完全不同。

我们为什么不做点什么呢

git branch -d --remote origin <branchname>

还是冒号背后有我不知道的深层含义？

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The colon isn't a "delete flag". Note that git push and git pull both accept zero or more refspecs as their final argument(s). Now read about refspecs. A colon separates source from destination in a refspec. The command git push origin :foo has an empty source and essentially says "push nothing to branch foo of origin", or, in other words, "make branch foo on origin not exist".

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最佳答案

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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