Mercurial中的克隆和复制之间的区别 [英] Difference between cloning and copying in Mercurial
问题描述
是将.hg目录复制到另一个目录中还是与Mercurial中的克隆相同(尽管我认为这无关紧要，所以使用TortoiseHg)，或者Mercurial中的cloning命令在此过程中有什么特殊之处吗?
Is copying the .hg directory to another directory the same as cloning in Mercurial (using TortoiseHg although I think that's irrelevant) or does the cloning command in Mercurial do something special during that process?
推荐答案
几乎相同.克隆做了一些不同的事情，不需要做任何事情，但是其中一些很酷:
It's almost the same. Cloning does a few things different, none of which are required, but some of which are cool:
- 克隆也获得一个工作目录(使用-U可以避免该问题)
- 克隆将源回购设置为.hg/hgrc文件中用于推/拉的默认设置
- 克隆只能获取原始副本的一部分(克隆-r X只能获取修订版X，并且仅适用于所有祖先)
- 文件系统支持克隆时，克隆会使用硬链接
最后一个很酷.这意味着，如果我有一个200GB的存储库并且执行了clone -U src dest，我将得到一个完全不使用任何磁盘空间的完整克隆！如果跳过-U，我将得到一个占用空间的工作副本，并且当两个克隆开始分散时，新副本开始占用空间，但是基本的clone -U是瞬时的，并且现代文件上没有磁盘空间系统.副本并非如此(它也可以正常工作).
That last one is pretty cool. It means that if I have a 200GB repo and I do a clone -U src dest I get a full clone that uses no diskspace at all! If I skip the -U I get a working copy that takes up space, and as the two clones start to diverge the new one starts taking up space, but a basic clone -U is instantaneous and disk-space-free on modern file systems. That's not true of a copy (which does work just fine too).
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