“git checkout - .”和“git checkout -- .”之间的区别

使用“git checkout”时，我对这两个选项感到有点困惑

我一直用git checkout -- .清除我的工作目录。

但今天当我打字时git checkout - .因为失误。我发现 git 没有错误警报。

我读过git文档，也不知道这是什么-选项确实如此。这很难用谷歌搜索。

那么请问有人对此有任何想法吗？

使用时git checkout， 您可以使用-作为简写@{-1}.
From man git-checkout（强调第二段）：

<branch>
    Branch to checkout; if it refers to a branch (i.e., a name that, when
    prepended with "refs/heads/", is a valid ref), then that branch is checked
    out. Otherwise, if it refers to a valid commit, your HEAD becomes
    "detached" and you are no longer on any branch (see below for details).

    As a special case, the "@{-N}" syntax for the N-th last branch/commit
    checks out branches (instead of detaching). You may also specify - which is
    synonymous with "@{-1}".

通过在分支中创建文件来在空存储库中尝试此操作master，在另一个分支中修改它，并使用checkout -来自大师：

$ git init
Initialized empty Git repository in workspace/git-test/.git/

git:(master)  $ echo a > a
git:(master*) $ git add a 
git:(master*) $ git commit
[master (root-commit) 8433343] Add a to master
 1 file changed, 1 insertion(+)
 create mode 100644 a

git:(master)  $ git checkout -b other
Switched to a new branch 'other'

git:(other)   $ echo b > a
git:(other*)  $ git add a 
git:(other*)  $ git commit
[other be2298f] Replace a by b
 1 file changed, 1 insertion(+), 1 deletion(-)

git:(other)   $ git checkout -
Switched to branch 'master'

git:(master)  $ git checkout -- . # no changes (no * next to master in the line below)
git:(master)  $ git checkout - . # checking out files from alternate branch 'other'
git:(master*) $ git status
On branch master
Changes to be committed:
  (use "git reset HEAD <file>..." to unstage)

        modified:   a

git:(master*) $ cat a
b