[Git][多人协作][下]详细讲解

1.不同分支下多人协作

• ⼀般情况下，如果有多需求需要多⼈同时进⾏开发，是不会在⼀个分⽀上进⾏多⼈开发，⽽是⼀个需求或⼀个功能点就要创建⼀个feature分⽀
• 情景设置：
  • 目标：远程main分支下新增func1和func2文件
  • 实现：开发者A新增func1，开发者B新增func2
  • 条件：不同分支下协作完成，各自让某一个功能私有某一个分支
• 开发者A：在自己分支上，正常推送，没有问题

  $ vim func1
  $ cat func1
  fun1 from A$ git add .
  $ git commit -m "A push func1"
  [feature-1 84e77e0] A push func11 file changed, 1 insertion(+)create mode 100644 func1$ git push origin feature-1
  Enumerating objects: 4, done.
  Counting objects: 100% (4/4), done.
  Delta compression using up to 20 threads
  Compressing objects: 100% (2/2), done.
  Writing objects: 100% (3/3), 318 bytes | 159.00 KiB/s, done.
  Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
  To github.com:DieSnowK/Git-Learn.git10cd204..84e77e0  feature-1 -> feature-1
  

• 开发者B：在自己分支上，正常推送，没有问题

  $ cat func2
  fun2 fron B$ git add .
  $ git commit -m "B push func2"
  [feature-2 31c8cbb] B push func21 file changed, 1 insertion(+)create mode 100644 func2$ git push origin feature-2
  Enumerating objects: 4, done.
  Counting objects: 100% (4/4), done.
  Delta compression using up to 20 threads
  Compressing objects: 100% (2/2), done.
  Writing objects: 100% (3/3), 343 bytes | 343.00 KiB/s, done.
  Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
  To github.com:DieSnowK/Git-Learn.git10cd204..31c8cbb  feature-2 -> feature-2
  PS C:\Users\w1752\Desktop\My_Repository\Git-Learn>
  

• 至此，开发者A和开发者B都互相看不到对方开发的文档，并且在自己的分支上各自推送时，没有任何冲突，两人互不影响，开发起来很丝滑
• 假如此时开发者B无法继续完成文档开发，需要开发者A接手，该怎么办？
  • 开发者B将自己的分支名告诉开发者A，开发者A从远端仓库将该分支拉下来

    $ git branch
    * feature-1main$ git pull
    remote: Enumerating objects: 4, done.
    remote: Counting objects: 100% (4/4), done.
    remote: Compressing objects: 100% (2/2), done.
    remote: Total 3 (delta 0), reused 3 (delta 0), pack-reused 0
    Unpacking objects: 100% (3/3), 323 bytes | 323.00 KiB/s, done.
    From github.com:DieSnowK/Git-Learn* [new branch]      feature-2  -> origin/feature-2
    There is no tracking information for the current branch.
    Please specify which branch you want to merge with.
    See git-pull(1) for details.git pull <remote> <branch>If you wish to set tracking information for this branch you can do so with:git branch --set-upstream-to=origin/<branch> feature-1
    

  • 开发者A本地创建一个feature-2分支，并且和远端的feature-2分支关联起来

    $ git checkout -b feature-2 origin/feature-2
    Branch 'feature-2' set up to track remote branch 'feature-2' from 'origin'.
    Switched to a new branch 'feature-2'$ cat func2
    fun2 from B$ vim func2 # Coding...$ cat func2
    fun2 fron B
    fun2 Done from A$ git add .$ git commit -m "A edit func2 Done"
    [feature-2 2e279ac] A edit func2 Done1 file changed, 2 insertions(+), 1 deletion(-)$ git push origin feature-2
    Enumerating objects: 5, done.
    Counting objects: 100% (5/5), done.
    Delta compression using up to 20 threads
    Compressing objects: 100% (2/2), done.
    Writing objects: 100% (3/3), 280 bytes | 280.00 KiB/s, done.
    Total 3 (delta 1), reused 0 (delta 0), pack-reused 0
    remote: Resolving deltas: 100% (1/1), completed with 1 local object.
    To github.com:DieSnowK/Git-Learn.git31c8cbb..2e279ac  feature-2 -> feature-2
    

• 两人开发全部完毕后，都需要将各自的代码合并到main中才算真正的开发完毕，流程如下

  • 开发者A：

    • 切换至main，git pull，保证本地main是最新内容

    • 切换至feature-1分支，合并main分支，有冲突就在feature-1分支解决

    • 切换至main分支，合并feature-1分支

    • 将main分支推送至远端
      

      $ git checkout main
      Switched to branch 'main'
      Your branch is up to date with 'origin/main'.$ git pull
      Already up to date.$ git checkout feature-1
      Switched to branch 'feature-1'$ git merge main
      Already up to date.$ git checkout main
      Switched to branch 'main'
      Your branch is up to date with 'origin/main'.$ git merge feature-1
      Updating 10cd204..84e77e0
      Fast-forwardfunc1 | 1 +1 file changed, 1 insertion(+)create mode 100644 func1$ cat func1
      fun1 from A$ git push
      Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
      To github.com:DieSnowK/Git-Learn.git10cd204..84e77e0  main -> main
      

  • 开发者B：

    • 切换至main，git pull，保证本地main是最新内容

    • 切换至feature-2分支，合并main分支，有冲突就在feature-2分支解决

    • 由于feature-1分支已经merge进来了新内容，为了保证feature-2远程分支最新，最好在此时git push一下

      • git push的另一个原因是在实际的开发中，main的merge操作⼀般不是由我们⾃⼰在本地进进行，而是由审查人员进行
      • 其他⼈员或某些平台merge时，操作的肯定是远程分⽀，所以就要保证远程分⽀的最新
      • 如果此时merge发生冲突，解决完冲突后需要commit之后才能push

    • 切换至main分支，合并feature-2分支

    • 将main分支推送至远端
      

      $ git checkout main
      Switched to branch 'main'
      Your branch is up to date with 'origin/main'.$ git pull
      Already up to date.$ git checkout feature-2
      Switched to branch 'feature-2'
      Your branch is up to date with 'origin/feature-2'.$ git merge main
      Merge made by the 'ort' strategy.func1 | 1 +1 file changed, 1 insertion(+)create mode 100644 func1$ ls
      SnowK.txt  func1  func2$ git status
      On branch feature-2
      Your branch is ahead of 'origin/feature-2' by 2 commits.(use "git push" to publish your local commits)nothing to commit, working tree clean$ git push
      Enumerating objects: 4, done.
      Counting objects: 100% (4/4), done.
      Delta compression using up to 20 threads
      Compressing objects: 100% (2/2), done.
      Writing objects: 100% (2/2), 292 bytes | 292.00 KiB/s, done.
      Total 2 (delta 1), reused 0 (delta 0), pack-reused 0
      remote: Resolving deltas: 100% (1/1), completed with 1 local object.
      To github.com:DieSnowK/Git-Learn.git2e279ac..2250eeb  feature-2 -> feature-2$ git checkout main
      Switched to branch 'main'
      Your branch is up to date with 'origin/main'.$ git merge feature-2
      Updating 84e77e0..2250eeb
      Fast-forwardfunc2 | 2 ++1 file changed, 2 insertions(+)create mode 100644 func2$ ls
      SnowK.txt  func1  func2$ git push
      Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
      To github.com:DieSnowK/Git-Learn.git84e77e0..2250eeb  main -> main
      

• 至此，无论本地还是远端的feature-1和feature-2分支都没用了，可以直接删掉了

2.远程分⽀删除后，本地git branch -a依然能看到

• 问题描述：明明已经删除了远程的⼏个分⽀，但使⽤git branch -a发现很多在远程仓库已经删除的分⽀在本地依然可以看到
• 问题追溯：git remote show origin

  $ git remote show origin
  * remote originFetch URL: git@github.com:DieSnowK/Git-Learn.gitPush  URL: git@github.com:DieSnowK/Git-Learn.gitHEAD branch: mainRemote branches:main                     trackedrefs/remotes/origin/dev  stale (use 'git remote prune' to remove)refs/remotes/origin/test stale (use 'git remote prune' to remove)Local branch configured for 'git pull':main merges with remote mainLocal ref configured for 'git push':main pushes to main (up to date)
  

• 解决方案：使用git remote prune origin命令

  $ git remote prune origin
  Pruning origin
  URL: git@github.com:DieSnowK/Git-Learn.git* [pruned] origin/dev* [pruned] origin/test