git mv与直接mv的区别

git mv

行为：

　　1.创建一个和之前文件内容一样的文件，文件名为新的文件名

　　2.将原来的文件删除

　　3.将删除的文件添加到暂存区

　　4.将新建的文件添加到暂存区

$ git status
On branch master
Changes to be committed:
　　(use "git reset HEAD <file>..." to unstage)

　　renamed: a -> a1

提交：

　　直接 git commit -m ''

[master 863356d] rename a to a1
　　1 file changed, 0 insertions(+), 0 deletions(-)
　　rename a => a1 (100%)

$ git status
　　On branch master
　　nothing to commit, working directory clean

恢复：

　　1. 恢复暂存区（git reset HEAD oldName）

　　2. 将新添加的文件从暂存区移除（git reset HEAD newName）

　　3. 将原来的文件从暂存区恢复到工作区（git checout -- oldName）

　　3. 从工作区删除新添加的这个文件（rm newName）

$ git reset HEAD a
Unstaged changes after reset:
D       a

$ git status
On branch master
Changes to be committed:
  (use "git reset HEAD <file>..." to unstage)

        new file:   a1

Changes not staged for commit:
  (use "git add/rm <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

        deleted:    a


$ git reset HEAD a1
Unstaged changes after reset:
D       a

$ git status
On branch master
Changes not staged for commit:
  (use "git add/rm <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

        deleted:    a

Untracked files:
  (use "git add <file>..." to include in what will be committed)

        a1

no changes added to commit (use "git add" and/or "git commit -a")

$ git checkout -- a

$ git status
On branch master
Untracked files:
  (use "git add <file>..." to include in what will be committed)

        a1

nothing added to commit but untracked files present (use "git add" to track)

$ rm a1

$ git status
On branch master
nothing to commit, working directory clean

直接调用系统的mv

行为：

　　只是重命名了一个文件

$ mv a a1

$ git status
On branch master
Changes not staged for commit:
  (use "git add/rm <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

        deleted:    a

Untracked files:
  (use "git add <file>..." to include in what will be committed)

        a1

no changes added to commit (use "git add" and/or "git commit -a")

提交：

　　1.把新文件和旧文件加入暂存区

　　2.提交暂存区的改动

$ git add a a1

$ git status
On branch master
Changes to be committed:
  (use "git reset HEAD <file>..." to unstage)

        renamed:    a -> a1


$ git commit -m 'rename a to a1'
[master 8b02e6a] rename a to a1
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename a => a1 (100%)

$ git status
On branch master
nothing to commit, working directory clean

恢复：

　　1.将旧文件恢复到工作区，git checout -- oldName

　　2.将新文件删除， rm newName

$ git checkout -- a
$ rm a1

$ git status
On branch master
nothing to commit, working directory clean