使用 GIT 获得Linux Kernel的代码并查看，追踪历史记录-白红宇

使用 GIT 获得Linux Kernel的代码并查看，追踪历史记录

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发布时间：2019-06-25

本文共 6022 字，大约阅读时间需要 20 分钟。

Linux kernel 的官方 GIT地址是：

可以从这个地址拿到 kernel 的代码仓库。

1. 拿代码仓库

git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git

2. 查看状态：

$ git status  # On branch master  nothing to commit (working directory clean)

3. 更新本地的代码：

$ git pull  Already up-to-date.

4. 切换到分支：

$ git checkout linux-3.10.y   Checking out files: 100% (25952/25952), done.  Switched to branch 'linux-3.10.y'

5. 查看分支信息：

$ git branch    * linux-3.10.y    master

$ git branch  -a  * linux-3.10.y    master    remotes/origin/HEAD -> origin/master    remotes/origin/linux-2.6.11.y    remotes/origin/linux-2.6.12.y    remotes/origin/linux-2.6.13.y    remotes/origin/linux-2.6.14.y    remotes/origin/linux-2.6.15.y    remotes/origin/linux-2.6.16.y    remotes/origin/linux-2.6.17.y    remotes/origin/linux-2.6.18.y    remotes/origin/linux-2.6.19.y    remotes/origin/linux-2.6.20.y    remotes/origin/linux-2.6.21.y    remotes/origin/linux-2.6.22.y    remotes/origin/linux-2.6.23.y    remotes/origin/linux-2.6.24.y    remotes/origin/linux-2.6.25.y    remotes/origin/linux-2.6.26.y    remotes/origin/linux-2.6.27.y    remotes/origin/linux-2.6.28.y    remotes/origin/linux-2.6.29.y    remotes/origin/linux-2.6.30.y    remotes/origin/linux-2.6.31.y    remotes/origin/linux-2.6.32.y    remotes/origin/linux-2.6.33.y    remotes/origin/linux-2.6.34.y    remotes/origin/linux-2.6.35.y    remotes/origin/linux-2.6.36.y    remotes/origin/linux-2.6.37.y    remotes/origin/linux-2.6.38.y    remotes/origin/linux-2.6.39.y    remotes/origin/linux-3.0.y    remotes/origin/linux-3.1.y    remotes/origin/linux-3.10.y    remotes/origin/linux-3.11.y    remotes/origin/linux-3.12.y    remotes/origin/linux-3.13.y    remotes/origin/linux-3.14.y    remotes/origin/linux-3.2.y    remotes/origin/linux-3.3.y    remotes/origin/linux-3.4.y    remotes/origin/linux-3.5.y    remotes/origin/linux-3.6.y    remotes/origin/linux-3.7.y    remotes/origin/linux-3.8.y    remotes/origin/linux-3.9.y    remotes/origin/master

6. 创建一个新分支：

$ git checkout -b linux-3.10-charles   Switched to a new branch 'linux-3.10-charles'

$ git branch   * linux-3.10-charles    linux-3.10.y    master

7. 修改文件 init/main.c, 加入一行注释，然后执行

git add .

$ git status  # On branch linux-3.10-charles  # Changes to be committed:  #   (use "git reset HEAD 
     
      ..." to unstage)  #  #   modified:   init/main.c  #

e$ git add -i             staged     unstaged path    1:        +2/-0      nothing init/main.c    *** Commands ***    1: [s]tatus     2: [u]pdate     3: [r]evert     4: [a]dd untracked    5: [p]atch      6: [d]iff   7: [q]uit   8: [h]elp  What now>

如果选择 revert 命令，相当于 undo "git add .":

What now> r             staged     unstaged path    1:        +2/-0      nothing [i]nit/main.c  Revert>>   reverted one path    *** Commands ***    1: [s]tatus     2: [u]pdate     3: [r]evert     4: [a]dd untracked    5: [p]atch      6: [d]iff   7: [q]uit   8: [h]elp  What now> q

这个时候再执行 git status:

$ git status  # On branch linux-3.10-charles  # Changes not staged for commit:  #   (use "git add 
     
      ..." to update what will be committed)  #   (use "git checkout -- 
      
       ..." to discard changes in working directory)  #  #   modified:   init/main.c  #  no changes added to commit (use "git add" and/or "git commit -a")

8. 提交修改：

$ git commit -a -m "This is just for testing git"  [linux-3.10-charles 9eabb78] This is just for testing git   1 file changed, 1 insertion(+), 1 deletion(-)

9. 查看修改记录(git log)：

commit 9eabb788b5c33efed589b1263aedd69b97e592ac  Author: Taotao Ding 
     
        Date:   Wed May 7 03:36:55 2014 +0900        This is just for testing git    commit 5d897eedc505bb8af1f4865ae381eadbfd3bc8c1  Author: Greg Kroah-Hartman 
      
         Date:   Tue May 6 07:56:24 2014 -0700        Linux 3.10.39    commit 6b32172a1d3cffa74067ced96612bd13658d4fcf  Author: Felipe Balbi 
       
          Date:   Tue Feb 25 10:58:43 2014 -0600        usb: musb: avoid NULL pointer dereference

可以看到，修改已经被记录起来了。

git log  -p  commit 9eabb788b5c33efed589b1263aedd69b97e592ac  Author: Taotao Ding 
     
        Date:   Wed May 7 03:36:55 2014 +0900        This is just for testing git    diff --git a/init/main.c b/init/main.c  index e83ac04..febc1e9 100644  --- a/init/main.c  +++ b/init/main.c  @@ -10,7 +10,7 @@    */      #define DEBUG          /* Enable initcall_debug */  -  +/* This is a test line for git */   #include 
      
          #include 
       
           #include

10：查看一个文件最近的修改记录：

$ git log master..HEAD init/main.c  commit 9eabb788b5c33efed589b1263aedd69b97e592ac  Author: Taotao Ding 
     
        Date:   Wed May 7 03:36:55 2014 +0900        This is just for testing git    commit b7a52f5111bc53ffbfff96330621cbde80df6ba4  Author: Theodore Ts'o 
      
         Date:   Tue Sep 10 10:52:35 2013 -0400        random: run random_int_secret_init() run after all late_initcalls            commit 47d06e532e95b71c0db3839ebdef3fe8812fca2c upstream.            The some platforms (e.g., ARM) initializes their clocks as      late_initcalls for some unknown reason.  So make sure      random_int_secret_init() is run after all of the late_initcalls are      run.            Signed-off-by: "Theodore Ts'o" 
       
              Signed-off-by: Greg Kroah-Hartman

11：比较两个分支的差异：

$ git log linux-3.10.y..linux-3.10-charles   commit 9eabb788b5c33efed589b1263aedd69b97e592ac  Author: Taotao Ding 
     
        Date:   Wed May 7 03:36:55 2014 +0900        This is just for testing git

当前分支也可写成 HEAD，所以：

$ git log linux-3.10.y..HEAD  commit 9eabb788b5c33efed589b1263aedd69b97e592ac  Author: Taotao Ding 
     
        Date:   Wed May 7 03:36:55 2014 +0900        This is just for testing git

reference:

P.S.

配置 username 和 user.email 的方法：

git config user.email "username"

git config user.email "email@server"

这两个命令改变 .git/config 配置文件（local)

git config --global user.email "username"

git config --global user.email "email@server"

git config --global core.editor "vim"

则改变全局的 git 配置文件（～/.gitconfig)

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