readme.txt
中添加了一行:$ cat readme.txt
Git is a distributed version control system.
Git is free software distributed under the GPL.
Git has a mutable index called stage.
Git tracks changes of files.
My stupid boss still prefers SVN.
stupid boss
可能会让你丢掉这个月的奖金!
git status
查看一下:
$ git status
On branch master
Changes not staged for commit:
(use "git add <file>..." to update what will be committed)
(use "git checkout -- <file>..." to discard changes in working directory)
modified: readme.txt
no changes added to commit (use "git add" and/or "git commit -a")
git checkout -- file
可以丢弃工作区的修改:$ git checkout -- readme.txt
命令git checkout -- readme.txt
意思就是,把readme.txt
文件在工作区的修改全部撤销,这里有两种情况:
readme.txt
自修改后还没有被放到暂存区,现在,撤销修改就回到和版本库一模一样的状态;
readme.txt
已经添加到暂存区后,又作了修改,现在,撤销修改就回到添加到暂存区后的状态。
git commit
或git add
时的状态。
readme.txt
的文件内容:
$ cat readme.txt
Git is a distributed version control system.
Git is free software distributed under the GPL.
Git has a mutable index called stage.
Git tracks changes of files.
git checkout -- file
命令中的–很重要,没有--
,就变成了“切换到另一个分支”的命令,我们在后面的分支管理中会再次遇到git checkout
命令。
git add
到暂存区了:
$ cat readme.txt
Git is a distributed version control system.
Git is free software distributed under the GPL.
Git has a mutable index called stage.
Git tracks changes of files.
My stupid boss still prefers SVN.
$ git add readme.txt
commit
之前,你发现了这个问题。用git status
查看一下,修改只是添加到了暂存区,还没有提交:$ git status
On branch master
Changes to be committed:
(use "git reset HEAD <file>..." to unstage)
modified: readme.txt
git reset HEAD <file>
可以把暂存区的修改撤销掉(unstage)
,重新放回工作区:$ git reset HEAD readme.txt
Unstaged changes after reset:
M readme.txt
git reset
命令既可以回退版本,也可以把暂存区的修改回退到工作区。当我们用HEAD
时,表示最新的版本。
git status
查看一下,现在暂存区是干净的,工作区有修改:
$ git status
On branch master
Changes not staged for commit:
(use "git add <file>..." to update what will be committed)
(use "git checkout -- <file>..." to discard changes in working directory)
modified: readme.txt
$ git checkout -- readme.txt
$ git status
On branch master
nothing to commit, working tree clean
整个世界终于清静了!
git checkout -- file
。
git reset HEAD <file>
,就回到了场景1,第二步按场景1操作。