再学一遍git使用方法，git把分支代码合并到master主分支

1. test分支合并到master，合并分支代码

a. 创建分支

git branch test

b. 切换分支

git checkout test

c. 需求：把test分支合并到master合并代码步骤

1）. 修改test分支代码

2）.提交test分支代码到test分支

    git add .
    git commit -m ""
    git push origin test

3）.切换到需要合并代码的分支

　　当前分支为test，切换到master

    git checkout master

4）.master分支需要pull一下

　　有时候如果改了有时候会报错

    git checkout . 这样就全恢复回来了

5）.合并代码

　　备注：现在在分支master上

    git merge test
    这个时候会出现代码冲突，强制合并为test分支的代码
    git status 查看状态，以及出现冲突的文件
    git checkout test <冲突的wenj>
    git checkout test 1.txt 　　强制合并，把冲突的test代码覆盖到master上来

6）.master提交代码

    git add .
    git commit 
    git push origin master

7）. 切换到test分支（保持一个好习惯pull一下）

git pull origin test    
# git pull origin master， 其实这里要注意一下，一般test代码为最新的，master代码都是生产环境代码比较稳定，根据现实情况是否需要在test分支pull master代码

2. 协同开发，合并代码，解决冲突

需求：

甲在test分支开发，已经提交了一次，而乙还没有pull test分支，并且继续开发，怎么合并代码并提交代码

a. 甲开发代码并提交到test分支

git add .
git commit -m ""
git push origin test

2. 乙开发并没有更新pull甲的代码

乙相对于甲还在上一个版本并开发中

3. 乙push提交代码到test分支，报错

doman@LAPTOP-BGQ47KT1 MINGW64 ~/Desktop/test_git_file/two_people_dev_file/test_git (test)
$ git add .

doman@LAPTOP-BGQ47KT1 MINGW64 ~/Desktop/test_git_file/two_people_dev_file/test_git (test)
$ git commit -m "乙修改了代码"
[test 310cb0c] 涔欎慨鏀逛簡浠ｇ爜
 1 file changed, 2 insertions(+)

doman@LAPTOP-BGQ47KT1 MINGW64 ~/Desktop/test_git_file/two_people_dev_file/test_git (test)
$ git push origin test
======================================================================================================================================
报错啦
To https://github.com/renfanzi/test_git.git
 ! [rejected]        test -> test (fetch first)
error: failed to push some refs to 'https://github.com/renfanzi/test_git.git'
hint: Updates were rejected because the remote contains work that you do
hint: not have locally. This is usually caused by another repository pushing
hint: to the same ref. You may want to first integrate the remote changes
hint: (e.g., 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.

4. 乙需要git pull origin test

doman@LAPTOP-BGQ47KT1 MINGW64 ~/Desktop/test_git_file/two_people_dev_file/test_git (test)
$ git pull origin test
remote: Enumerating objects: 5, done.
remote: Counting objects: 100% (5/5), done.
remote: Compressing objects: 100% (1/1), done.
remote: Total 3 (delta 1), reused 3 (delta 1), pack-reused 0
Unpacking objects: 100% (3/3), 283 bytes | 21.00 KiB/s, done.
From https://github.com/renfanzi/test_git
 * branch            test       -> FETCH_HEAD
   c6e0160..3d92ce9  test       -> origin/test
Auto-merging 1.txt
CONFLICT (content): Merge conflict in 1.txt      ----------------------------------》看这里，合并冲突到1.txt  conflict 冲突的意思
Automatic merge failed; fix conflicts and then commit the result.  ----------------》自动合并失败，修改冲突并提交

5. 乙需要git status查看状态，有冲突代码

doman@LAPTOP-BGQ47KT1 MINGW64 ~/Desktop/test_git_file/two_people_dev_file/test_git (test|MERGING)
$ git status
On branch test
Your branch and 'origin/test' have diverged,
and have 1 and 3 different commits each, respectively.
  (use "git pull" to merge the remote branch into yours)

You have unmerged paths.
  (fix conflicts and run "git commit")
  (use "git merge --abort" to abort the merge)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
        both modified:   1.txt　　　　--------------------》 看这里

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

6. 手动修改解决冲突

doman@LAPTOP-BGQ47KT1 MINGW64 ~/Desktop/test_git_file/two_people_dev_file/test_git (test|MERGING)
$ cat 1.txt
123456
test_master
修改了test分支代码　　
<<<<<<< HEAD　　　　----------------》 删代码吧，手动，其实可以ctrl + f搜一下

乙修改了代码
=======
master已经合并test代码

甲修改了代码

>>>>>>> 3d92ce95a546197f614f9a76c7ccb3ae6987c24f

7. 乙再次提交

git add .
git commit -m ""
git push origin test

8. 再次合并到master，按照上面的步骤

 3. 切换分支，并保存修改的代码

需求：

当我在test开发的时候，这个时候需要在master上做出一些修改；然后再切换回test分支继续完成工作，怎么办？

git commit 

步骤：

1. test上工作

git add .
git commit -m ""

2. 切换到master分支，修改代码

git checkout master
修改代码
git add .
git commit -m ""

3. 切换到test分支继续工作