如何检查远程文件是否存在?

问题描述：

有没有一种方法可以检查远程中是否存在指定的相对路径下的文件?如果唯一的选择，我可以先获取信息.换句话说，我正在寻找带有指定远程和分支的选项的git-ls-files.我只对文件是否存在感兴趣(分支上的文件列表也可以)，我不在乎哈希，差异等.

Is there a way to check if a file under specified, relative path exist in a remote? I'm fine with fetching the info first if it's the only option. In other words I'm looking for git-ls-files with an option to specify remote and branch. I'm only interested if the file exists (a list of files on the branch will do as well), I don't care about hashes, diffs etc.

答

您可以使用

git cat-file -e <remote>:<filename>

，当文件存在时，它将以零退出.您可以使用远程分支名称代替上面的<remote>(但实际上它可以是任何树状对象引用).要使用这样的远程分支，您需要配置和获取远程存储库(即使用git remote add + git fetch).

which will exit with zero when the file exists. Instead of <remote> above you'd use a remote branch name (but it could in fact be any tree-ish object reference). To use such a remote branch, you'll need to have the remote repository configured and fetched (i.e. by using git remote add + git fetch).

一个具体示例:

$ git cat-file -e origin/master:README && echo README exists
README exists

$ git cat-file -e origin/master:FAILME
fatal: Not a valid object name origin/master:FAILME

需要注意的两件事:

在文件名中使用/作为路径分隔符，即使在例如Windows.
<filename>是相对于存储库根目录的完整路径(例如foo/bar/README).

Use / as path delimiter in filenames, even on e.g. Windows.
<filename> is a full path (such as foo/bar/README), relative to the root of the repository.

如何检查远程文件是否存在?

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