Git使用总结

一，原理

首先，我们要明白Git是什么，它是一个管理工具或软件，用来管理什么的呢？当然是在软件开发过程中管理软件或者文件的不同版本的工具，一些作家也可以用这个管理自己创作的文本文件，由Linus开发的，也是Linux系统开发所用到的分布式版本控制软件。一说到分布式，其实就是每个电脑都有这么个版本库，而摒弃了传统的中心文件系统服务，所以每个人都能保存、还原之前的版本。在航天二院实习的时候，mentor让我改一个软件的Bug，由于国企没有外网，所以不能用github，院里面也没有搭建自己的Git文件服务器，所以每次改Bug之前都要备份一个之前的版本，以日期命名，而且后面还容易忘记那个版本有哪些功能模块，就我们两个人开发一个软件都把版本搞错了好几次，真心头痛。

git1_thumb[2]

二，Git常用命令

git的常用命令有：init、add、rm、mv、commit、push、pull、clone、log、checkout、megre、status、branch、diff、config、remote、fetch、reset、tag、show、stash、grep、rebase、gc等。

 

1，本地操作

Git命令 解释 撒旦法备注
git init 初始化Git环境 先cd到要管理的文件夹中
git add *.txt / . 添加文件到暂存区 . 是将所有文件都添加到暂存区
git status 查看文件的状态  
git commit -m 'First commit' 提交更新到版本库 -m 是message的缩写，即每次添加更新的备注
git log 查看提交更新的记录  
git rm *.txt 删除文件  
git mv a.txt b.txt 修改文件名 将a.txt的文件名改为b.txt

 

2，远程操作

Git命令 解释 撒旦法备注
git config --global user.name "your name" 设置username，因为github每次commit都会记录他们 github注册时的用户名
git config --global user.email "your_email@youremail.com" 设置email github注册时的邮箱地址
git remote add origin https://...git 查看文件的状态与Github建立远程连接 现在github网站上建立仓库
git push -u origin master 提交推送到Github的仓库中 master分支可以是其他分支
   

 

在远程操作Github之前要进行ssh key的配置，网上有很多教程可以参考。大概分三步：

  • 在本地创建ssh key，$ ssh-keygen -t rsa -C "your_email@youremail.com" （github网站上注册的邮箱），回车后会在当前用户.ssh文件夹下生成id_rsa、id_rsa.pub、known_hosts三个文件

  • 打开id_rsa.pub，复制里面的key， 回到github网站，进入Account Settings，左边选择SSH Keys，Add SSH Key, Title随便填，粘贴key。

  • 验证是否成功，在本地git bash下输入，$ ssh -T git@github.com ，回车就会看到：You’ve successfully authenticated, but GitHub does not provide shell access 。这就表示已成功连上github。

参考链接：

git中sshkey有何作用？

http://www.bootcss.com/p/git-guide/

 

Git命令脑图（图片来自Github）

Git_V2.16.2

 

3，Git分支管理模型Pic

git分支管理模型_thumb[3]

三，Demo

1，初始化一个git仓库，新建一个code.txt文件，提交到git版本库，现在git开始管理code.txt文件了

ckjbug@ckjbug MINGW64 ~/Desktop

$ mkdir gituse

ckjbug@ckjbug MINGW64 ~/Desktop

$ cd gituse

ckjbug@ckjbug MINGW64 ~/Desktop/gituse

$ git init

Initialized empty Git repository in C:/Users/Enz/Desktop/gituse/.git/

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git status

On branch master

No commits yet

Untracked files:

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

code.txt

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

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git add code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git status

On branch master

No commits yet

Changes to be committed:

  (use "git rm --cached <file>..." to unstage)

new file:   code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git commit -m 'First commit'

[master (root-commit) 0f67f2c] First commit

 1 file changed, 0 insertions(+), 0 deletions(-)

 create mode 100644 code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git status

On branch master

nothing to commit, working tree clean

2，修改文件，在code.txt添加一行代码，然后用checkout回到修改前（即没有添加代码前的版本，这里之前写入的代码没有了，空文本），这只是checkout的一种用法，更多是后面学习的git的分支转换。

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ 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:   code.txt

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

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git checkout -- code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ notepad code.txt

3，还是上面这个功能，回到文本修改前的状态，但是我们修改文件后已经添加到暂存区了，这时使用git checkout code.txt已经没用了，可以用git reset回到没有添加到暂存区的状态（最初始的状态）

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ clear

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ 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:   code.txt

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

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git add code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git checkout code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git reset

Unstaged changes after reset:

M       code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ 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:   code.txt

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

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git checkout -- code.txt

4，添加、切换、删除分支（添加develop开发者的工作分支）

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git branch

* master

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git branch develop

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git branch

  develop

* master

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git checkout develop

Switched to branch 'develop'

M       code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git branch

* develop

  master

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git checkout master

Switched to branch 'master'

M       code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git branch

  develop

* master

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git branch -d develop

Deleted branch develop (was 0f67f2c).

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git branch

* master

5，新建一个开发者develop分支，然后添加develop.txt文本，添加到暂存库，提交，最后转换到master分支，发现develop.txt文本不见了，这就是版本管理，每个分支控制一个版本，当我们转回到develop分支下时这个devel.txt文件又出现了。如果我们在develop分支下修改了master分支的code.txt，当我们转换为master分支上时，不会出现develop分支下的修改。

ckjbug@ckjbug MINGW64 ~/Desktop/gituse

$ git init

Initialized empty Git repository in C:/Users/Enz/Desktop/gituse/.git/

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git status

On branch master

No commits yet

Untracked files:

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

code.txt

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

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git add .

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git status

On branch master

No commits yet

Changes to be committed:

  (use "git rm --cached <file>..." to unstage)

new file:   code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git commit -m 'First commit'

[master (root-commit) 2571887] First commit

 1 file changed, 0 insertions(+), 0 deletions(-)

 create mode 100644 code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git status

On branch master

nothing to commit, working tree clean

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git branch

* master

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git branch develop

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git checkout develop  //之后添加一个develop.txt文件

Switched to branch 'develop'

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git branch

* develop

  master

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git status

On branch develop

Untracked files:

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

develop.txt

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

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git add develop.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git commit -m 'add a develop_txt on branch develop'

[develop 2fd0d60] add a develop_txt on branch develop

 1 file changed, 0 insertions(+), 0 deletions(-)

 create mode 100644 develop.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git branch

* develop

  master

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git checkout master

Switched to branch 'master'

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git checkout develop  //在develop分支下修改master分支下的code.txt文件

Switched to branch 'develop'

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git status

On branch develop

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:   code.txt

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

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git add code.txt

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git commit -m '在develop分支下修改了master分支的code.txt文件'

[develop 903c8e0] 在develop分支下修改了master分支的code.txt文件

 1 file changed, 1 insertion(+)

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git status

On branch develop

nothing to commit, working tree clean

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (develop)

$ git checkout master   //此时code.txt修改的代码不在了

Switched to branch 'master'

Image

 

6,融合分支，在master分支上时，将develop分支merge到master分支上。这时develop.txt文件出现了。即融合到了master分支中。

ckjbug@ckjbug MINGW64 ~/Desktop/gituse (master)

$ git merge develop

Updating 2571887..903c8e0

Fast-forward

 code.txt    | 1 +

 develop.txt | 0

 2 files changed, 1 insertion(+)

 create mode 100644 develop.txt

7，Merge时冲突的处理，加入两个不同分支同时修改了主分支下code.txt中的第三行代码，两个分支在融合时会冲突。

解决冲突的参考链接：https://www.liaoxuefeng.com/wiki/0013739516305929606dd18361248578c67b8067c8c017b000/001375840202368c74be33fbd884e71b570f2cc3c0d1dcf000

 

8，远程推送push、拉取pull项目代码，在实际项目中，往往已经存在了远程的项目，当你参与到项目的开发当中时，

如果我们将一个Github已经存在的项目clone下来，然后修改后与远程仓库连接，出现这样的错误：fatal: remote origin already exists. 则可以输入 git remote rm origin后从新建立连接。
参考链接：

https://blog.csdn.net/weijinqian0/article/details/76217014

 

split

相关链接：

在线教程【廖雪峰】

知乎

我的GitHub总结大全

posted @ 2018-10-09 16:51  ckjbug  阅读(354)  评论(2)  编辑  收藏  举报