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git 官方文档
https://git-scm.com/book/zh/v2/

官方推荐书籍 progit_v2.1.36.pdf

github 搜索技巧

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proj_name  in:name                                                #项目名
proj_name  in:name,description,                                   #项目名 或描述
proj_name  in:name,description,readme                             #项目名 或描述 或readme文件中
proj_name  stars:>=9000                                           #星数大于9000
proj_name  forks:>=9000                                           #fork数大于9000
proj_name  forks:2000..5000                                       #fork数指定范围
proj_name  forks:2000..5000 stars:>9000                           #同时限定
stars:>2000 extension:c language:c                                #根据语言搜索项目
location:shanghai       language:c                                #搜索某地区的人
awesome redis                                                     #搜索精品
awesome nginx                                                     #搜索精品
https://github.com/antirez/redis/blob/unstable/src/ae.c#L12       #高亮某一行
https://github.com/antirez/redis/blob/unstable/src/ae.c#L12-L23   #高亮某一片
在repo界面按下t键                                                 #参考github快捷键

git config 配置

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git config --local  对某个仓库
git config --global 当前用户的所有仓库
git config --system 当所有用户的所有仓库

git config --global user.name  "user1"
git config --global user.email "123@123.com"
git config --global core.editor vim
git config --global color.ui    true
git config --global --edit
git config --global --list

将本地项目与远程项目关联

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chunli@ubuntu:~/git$ git init
chunli@ubuntu:~/git$ git remote add origin https://github.com/xxxx/xxxx.git   #设置仓库关联
chunli@ubuntu:~/git$ git push --set-upstream origin  master                   #设置分支关联
chunli@ubuntu:~/git$ git push              -u origin  master                  #设置分支关联,也可以这样写
chunli@ubuntu:~/git$ git add
chunli@ubuntu:~/git$ git commit
chunli@ubuntu:~/git$ git push

清理工作区

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chunli@ubuntu:~$ git checkout  .  # 恢复被修改的文件
chunli@ubuntu:~$ git clean -d -f  # 删除没有被版本控制的文件

git 文件管理操作

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git init  [dir]           目录项可选
git add   file_1          将文件添加到暂存区
git reset HEAD file       将添加到缓存区的文件file从暂存区移除，所做的修改保留到本地

git add -u                  将已经纳入管理的文件， 添加到暂缓区
git diff                    默认比较文件， 也可以比较分支
git commit   -m "log info"  创建提交
git commit  -am "log info"  被管理的已修改的，等效于 git add xxx && git commit -m "xxxx"

git mv
git rm          xxxx
git rm --cached xxx       从版本控制里删除，但不删除工作区
git status
git reset HEAD            回退到最新版本
git reset xxxx            回退到xx版本，不清空工作区
git reset --hard xxx      回退到xx版本,并清空工作区
git checkout -- files...  将工作区的文件还原
git checkout -- files...  将版本库的文件还原到暂存区，再到工作区(如果暂存区文件被reset)

git diff

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git diff
chunli@ubuntu:~/git$ git diff                 #工作区与暂存区比较
chunli@ubuntu:~/git$ git diff HEAD            #工作区与版本库比较
chunli@ubuntu:~/git$ git diff --cached        #暂存区与版本库比较

工作区与暂存区 管理:

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chunli@ubuntu:~/git$ echo "hello git" >> main.c
chunli@ubuntu:~/git$ git  add main.c
chunli@ubuntu:~/git$ echo "hello git" >>  main.c
chunli@ubuntu:~/git$ git  add main.c
chunli@ubuntu:~/git$ echo "hello bash" >>
chunli@ubuntu:~/git$ git  checkout -- main.c     # 将暂存区覆盖到工作区， "hello bash" 被丢失
chunli@ubuntu:~/git$ git  diff                  #  无反应
chunli@ubuntu:~/git$ git  diff  分支名          #  可显示差异
chunli@ubuntu:~/git$ git  reset HEAD main.c      # 删除暂存区的内容，保留工作区

游离HEAD提交， 不创建分支

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chunli@ubuntu:~/git$ git checkout  318ab8159a
chunli@ubuntu:~/git$ vim main.c
chunli@ubuntu:~/git$ git commit -am "detached HEAD "
chunli@ubuntu:~/git$ git checkout master

版本回退

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chunli@ubuntu:~/git$ git reset --hard HEAD               #--hard 丢弃工作区内容
chunli@ubuntu:~/git$ git reset --hard HEAD^
chunli@ubuntu:~/git$ git reset --hard HEAD^^
chunli@ubuntu:~/git$ git reset --hard HEAD^^^
chunli@ubuntu:~/git$ git reset --hard HEAD~2
chunli@ubuntu:~/git$ git reset --hard xxxx

版本回退，溯源

版本回退，每个commit只能记住父ID， 不知道子ID，所以能往前退， 不能往后退。

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chunli@ubuntu:~/git$ git reflog                  #根据操作日志，获取最新的提交在哪里
4e9f559 (HEAD -> master) HEAD@{0}: commit: 123
4d5788d HEAD@{1}: reset: moving to 4d5788d47b725f810d0e0c198f45dba972e3bd51
618097e (origin/master, origin/HEAD) HEAD@{2}: clone: from https://gitlab.li-chunli.top:20443/root/mycode.git
chunli@ubuntu:~/git/mycode$

查看日志

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chunli@ubuntu:~/Git/$ git log
chunli@ubuntu:~/Git/$ git log --oneline
chunli@ubuntu:~/Git/$ git log -n 4
chunli@ubuntu:~/Git/$ git log --all  显示所有分支
chunli@ubuntu:~/Git/$ git log --graph

重要概念:

HEAD 指向分支
分支指向提交
提交是一个个的对象

分支的增删改查

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chunli@ubuntu:~/Git$ git branch                     #查看分支
chunli@ubuntu:~/Git$ git branch   bug_fix           #创建分支
chunli@ubuntu:~/git$ git branch  -m bug_fix  dev    #分支改名
chunli@ubuntu:~/Git$ git checkout bug_fix           #切换到某分支
chunli@ubuntu:~/Git$ git checkout -                 #切换到最近操作的分支
chunli@ubuntu:~/Git$ git branch -d bug_fix          #删除不需要的分支(没有提交文件，或内容已经合并)
chunli@ubuntu:~/Git$ git branch -D bug_fix          #删除不需要的分支(有提交过文件)
chunli@ubuntu:~/Git$ git checkout -b bug_2          #创建并切换到新分支
chunli@ubuntu:~/Git$ git diff  bug_2                #分支的比较
chunli@ubuntu:~/Git$ git merge bug_2                #其他合并到本分支
chunli@ubuntu:~/Git$ git branch -v                  #显示分支的最新的信息
chunli@ubuntu:~/Git$ git branch -av                  #显示分支的最新的信息
chunli@ubuntu:~/Git$ git branch -avv                  #显示分支的最新的信息

分支冲突，分支互相合并

演示:
master <– branch 合并冲突
dev <– mster fast-forward

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显示分支的信息
chunli@ubuntu:~/Git$ git branch -v
  bug_2  d9e51a6 new main
* master d9e51a6 new main


修改主分支的文件，手动产生一个冲突
chunli@ubuntu:~/Git$ cat main.c
#include <stdio.h>
int main()
{
    return 0;
}
chunli@ubuntu:~/Git$ git add -u
chunli@ubuntu:~/Git$ git commit -m "master main.c"
[master 194c3a8] master main.c
 1 file changed, 1 insertion(+), 1 deletion(-)
chunli@ubuntu:~/Git$


修改某分支的文件，手动产生一个冲突
chunli@ubuntu:~/Git$ git checkout bug_2
chunli@ubuntu:~/Git$ cat main.c
#include <stdio.h>
int main()
{
    return 1;
}
chunli@ubuntu:~/Git$ git add -u
chunli@ubuntu:~/Git$ git commit -m "bug_2 main.c"
[bug_2 28b71ab] bug_2 main.c
 1 file changed, 1 insertion(+), 1 deletion(-)
chunli@ubuntu:~/Git$
chunli@ubuntu:~/Git$


合并到主分支， 提示有冲突
chunli@ubuntu:~/Git$ git checkout master
chunli@ubuntu:~/Git$ git diff bug_2           #显示分支冲突
chunli@ubuntu:~/Git$ git merge bug_2          #合并完成
chunli@ubuntu:~/Git$ vim main.c               #手动修改，解决冲突
chunli@ubuntu:~/Git$ git add main.c           #add表示解决了冲突
chunli@ubuntu:~/Git$ git commit -m "master merge"



切换到分支， Fast-forward！！！
chunli@ubuntu:~/Git$ git checkout  -
chunli@ubuntu:~/Git$ git merge master
Updating 28b71ab..a3f826f
Fast-forward
 main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
chunli@ubuntu:~/Git$

stash 保留工作区

stash 保留单个工作区

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chunli@ubuntu:~/git$ git stash         #保留工作区到stash，工作区与暂存区恢复commit的状态
chunli@ubuntu:~/git$ git pop           #恢复工作区并删除stash
chunli@ubuntu:~/git$ git stash  list   #列出保存的stash
chunli@ubuntu:~/git$ git stash  drop   #删除某个stash

stash 保留多个工作区（不常用）这多个都是基于同一个commit

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chunli@ubuntu:~/git$ echo "void fun1(){}">> main.c
chunli@ubuntu:~/git$ git stash
chunli@ubuntu:~/git$ echo "void fun2(){}">> main.c
chunli@ubuntu:~/git$ git stash save "二改"       #stash 可以有名字
chunli@ubuntu:~/git$ git stash list
stash@{0}: WIP on dev: e4b0319 3
stash@{1}: WIP on dev: e4b0319 3
chunli@ubuntu:~/git$ cat main.c     #保存到stash后， 文件内容没有变化

恢复工作区

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chunli@ubuntu:~/git$ git pop                     #恢复并删除stash
chunli@ubuntu:~/git$ git stash  apply
chunli@ubuntu:~/git$ git stash  apply stash@{1}  #恢复指定stash，并不删除stash
chunli@ubuntu:~/git$ git stash  drop
chunli@ubuntu:~/git$ git stash  drop stash@{0}

标签（发布里程碑）

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chunli@ubuntu:~/git$ git tag  ver1.0                   #创建轻量级标签
chunli@ubuntu:~/git$ git tag  -a ver2.0  -m "里程碑1"  #创建附注标签
chunli@ubuntu:~/git$ git tag                           #查看所有标签
chunli@ubuntu:~/git$ git tag  -l "*1.0*"               #查找标签
chunli@ubuntu:~/git$ git show ver1.0                   #查看某个标签的详细信息
chunli@ubuntu:~/git$ git push origin <tagname>         #推送某个标签
chunli@ubuntu:~/git$ git push origin --tags            #推送所有标签
chunli@ubuntu:~/git$ git tag  -d <tagname>             #删除标签
chunli@ubuntu:~/git$ git push origin --delete <tagname>#删除远程标签
chunli@ubuntu:~/git$ git push origin :refs/tags/xxxx   #删除远程标签
chunli@ubuntu:~/git$ git checkout 2.0.0                #检出标签
chunli@ubuntu:~/git$ git blame  <files>                #显示文件变更过程

查看远程分支信息

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chunli@ubuntu:~/git$ git clone https://gitlab.li-chunli.top:20443/root/mycode.git
chunli@ubuntu:~/git$ cd mycode/
chunli@ubuntu:~/git/mycode$ git remote  show
origin
chunli@ubuntu:~/git/mycode$ git remote  show  origin
* remote origin
  Fetch URL: https://gitlab.li-chunli.top:20443/root/mycode.git
  Push  URL: https://gitlab.li-chunli.top:20443/root/mycode.git
  HEAD branch: master
  Remote branch:
    master tracked
  Local branch configured for 'git pull':
    master merges with remote master
  Local ref configured for 'git push':
    master pushes to master (up to date)
chunli@ubuntu:~/git/mycode$


chunli@ubuntu:~/git/mycode$ echo "## 副标题"  >> README.md
chunli@ubuntu:~/git/mycode$ git commit -am "## 副标题"
chunli@ubuntu:~/git/mycode$ git push
Everything up-to-date
chunli@ubuntu:~/git/mycode$

git pull，git push

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chunli@ubuntu:~/git/mycode$ git  pull
Already up to date.
chunli@ubuntu:~/git/mycode$ git  push
Everything up-to-date
chunli@ubuntu:~/git/mycode$

本地分支与远程分支的对应关系

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chunli@ubuntu:~/git/mycode$ git branch -avv
* master                    4e9f559 [origin/master: ahead 4] 123
  remotes/origin/BUG_1      575f7d7 2
  remotes/origin/HEAD       -> origin/master
  remotes/origin/bug_1      575f7d7 2
  remotes/origin/master     618097e 删除 子模块
  remotes/origin_cat/master 7a00051 Add new file
chunli@ubuntu:~/git/mycode$

远程冲突解决：

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提交时 提示被拒绝
chunli@ubuntu:~/git/mycode_2$ git push
To ssh://gitlab.li-chunli.top:2022/root/mycode.git
 ! [rejected]        master -> master (fetch first)
error: failed to push some refs to 'ssh://git@gitlab.li-chunli.top:2022/root/mycode.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.
chunli@ubuntu:~/git/mycode_2$

获取最新代码
chunli@ubuntu:~/git/mycode_2$ git pull
remote: Enumerating objects: 5, done.
remote: Counting objects: 100% (5/5), done.
remote: Compressing objects: 100% (2/2), done.
remote: Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
Unpacking objects: 100% (3/3), done.
From ssh://gitlab.li-chunli.top:2022/root/mycode
   4d69a3c..8ec8871  master     -> origin/master
Auto-merging README.md
CONFLICT (content): Merge conflict in README.md
Automatic merge failed; fix conflicts and then commit the result.
chunli@ubuntu:~/git/mycode_2$


手动合并
chunli@ubuntu:~/git/mycode_2$ vim README.md
chunli@ubuntu:~/git/mycode_2$ git commit -am "2"
[master 575f7d7] 2

推送
chunli@ubuntu:~/git/mycode_2$ git push
Counting objects: 4, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (4/4), 423 bytes | 423.00 KiB/s, done.
Total 4 (delta 1), reused 0 (delta 0)
To ssh://gitlab.li-chunli.top:2022/root/mycode.git
   8ec8871..575f7d7  master -> master
chunli@ubuntu:~/git/mycode_2$



git pull == >   git fetch + git merge

git 别名:

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chunli@ubuntu:~/git/mycode$ git config --global  alias.AA "BB"
chunli@ubuntu:~/git/mycode$ git config --global  alias.AB "BB CCC"
chunli@ubuntu:~/git/mycode$ git config --global --unset  alias.AA
chunli@ubuntu:~/git/mycode$ git config --global --unset  alias.AB

创建分支 并推送,拉取（旧方法）

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chunli@ubuntu:~/git/mycode$ git checkout -b  dev
chunli@ubuntu:~/git/mycode$ vim dev.txt
chunli@ubuntu:~/git/mycode$ git add dev.txt
chunli@ubuntu:~/git/mycode$ git commit -m "dev"
chunli@ubuntu:~/git/mycode$ git push --set-upstream origin  dev
chunli@ubuntu:~/git/mycode$ git push                                 #再不会提示出错
chunli@ubuntu:~/git/mycode$ git branch -av
* dev                   7014e7b dev
  master                575f7d7 2
  remotes/origin/HEAD   -> origin/master
  remotes/origin/dev    7014e7b dev
  remotes/origin/master 575f7d7 2
chunli@ubuntu:~/git/mycode$


另外一个人拉取代码，并追踪此分支
chunli@ubuntu:~/git/mycode_2$ git pull
chunli@ubuntu:~/git/mycode_2$ git branch -av
chunli@ubuntu:~/git/mycode_2$ git  checkout -b dev origin/dev
chunli@ubuntu:~/git/mycode_2$

创建本地分支与远程分支不同名

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chunli@ubuntu:~/git/mycode_3$ git  checkout -b bug_1
Switched to a new branch 'bug_1'
chunli@ubuntu:~/git/mycode_3$

chunli@ubuntu:~/git/mycode_3$ git push --set-upstream origin  bug_1:BUG_1
Total 0 (delta 0), reused 0 (delta 0)
remote:
remote: To create a merge request for BUG_1, visit:
remote:   https://gitlab.li-chunli.top:20443/root/mycode/-/merge_requests/new?merge_request%5Bsource_branch%5D=BUG_1
remote:
To https://gitlab.li-chunli.top:20443/root/mycode.git
 * [new branch]      bug_1 -> BUG_1
Branch 'bug_1' set up to track remote branch 'BUG_1' from 'origin'.
chunli@ubuntu:~/git/mycode_3$

此时 git push 会报错
chunli@ubuntu:~/git/mycode_3$ git push
fatal: The upstream branch of your current branch does not match
the name of your current branch.  To push to the upstream branch
on the remote, use

    git push origin HEAD:BUG_1

To push to the branch of the same name on the remote, use

    git push origin bug_1

To choose either option permanently, see push.default in 'git help config'.
chunli@ubuntu:~/git/mycode_3$




查看分支
chunli@ubuntu:~/git/mycode_3$ git branch -avv
* bug_1                 575f7d7 [origin/BUG_1] 2
  master                575f7d7 [origin/master] 2
  remotes/origin/BUG_1  575f7d7 2
  remotes/origin/HEAD   -> origin/master
  remotes/origin/master 575f7d7 2
chunli@ubuntu:~/git/mycode_3$

正确的处理
chunli@ubuntu:~/git/mycode_3$ git push origin HEAD:BUG_1
Everything up-to-date
chunli@ubuntu:~/git/mycode_3$

chunli@ubuntu:~/git/mycode_3$ git push origin bug_1:BUG_1
Everything up-to-date
chunli@ubuntu:~/git/mycode_3$

创建分支 并推送,拉取（新方法）

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unli@ubuntu:~/git/mycode$ git checkout -b  dev_2
chunli@ubuntu:~/git/mycode$ vim 123.txt
chunli@ubuntu:~/git/mycode$ git add 123.txt
chunli@ubuntu:~/git/mycode$ git commit -am "123"
chunli@ubuntu:~/git/mycode$ git push -u origin dev_2
chunli@ubuntu:~/git/mycode$

另外一个人拉取代码，并追踪此分支
chunli@ubuntu:~/git/mycode_2$ 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 1), reused 0 (delta 0), pack-reused 0
Unpacking objects: 100% (3/3), done.
From ssh://gitlab.li-chunli.top:2022/root/mycode
 * [new branch]      dev_2      -> origin/dev_2
Already up to date.
chunli@ubuntu:~/git/mycode_2$ git checkout --track origin/dev_2
Branch 'dev_2' set up to track remote branch 'dev_2' from 'origin'.
Switched to a new branch 'dev_2'
chunli@ubuntu:~/git/mycode_2$ git branch -av
  dev                   7014e7b dev
* dev_2                 ca5dace 123
  master                575f7d7 2
  remotes/origin/HEAD   -> origin/master
  remotes/origin/dev    7014e7b dev
  remotes/origin/dev_2  ca5dace 123
  remotes/origin/master 575f7d7 2
chunli@ubuntu:~/git/mycode_2$

删除远程

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删除远程分支，方法1：
chunli@ubuntu:~/git/mycode_2$ git push origin :dev
chunli@ubuntu:~/git/mycode_2$


删除远程分支，方法2：
chunli@ubuntu:~/git/mycode_3$ git branch -avv
* master                  575f7d7 [origin/master] 2
  remotes/origin/HEAD     -> origin/master
  remotes/origin/branch_1 289a400 branch_1
  remotes/origin/master   575f7d7 2
chunli@ubuntu:~/git/mycode_3$ git push origin  --delete branch_1
To https://gitlab.li-chunli.top:20443/root/mycode.git
 - [deleted]         branch_1
chunli@ubuntu:~/git/mycode_3$ git branch -avv
* master                575f7d7 [origin/master] 2
  remotes/origin/HEAD   -> origin/master
  remotes/origin/master 575f7d7 2
chunli@ubuntu:~/git/mycode_3$


远程分支删除了，本地分支同步一下
chunli@ubuntu:~/git/mycode_2$ git remote prune origin

git submodule 子模块

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子模块-添加
chunli@ubuntu:~/git$ git clone  https://gitlab.li-chunli.top:20443/root/mycode.git
chunli@ubuntu:~/git/mycode$ git submodule add https://gitlab.li-chunli.top:20443/root/mycat.git    #添加子模块
chunli@ubuntu:~/git/mycode$ git status                                            #提醒有文件需要提交
chunli@ubuntu:~/git/mycode$ git commit -m "添加 子模块"
chunli@ubuntu:~/git/mycode$ git push

子模块-更新

方法1:
到子模块目录执行: git pull

方法2:
chunli@ubuntu:~/git/mycode$ git submodule foreach git pull

更新之后， 提示有修改请提交
chunli@ubuntu:~/git/mycode$ git status
chunli@ubuntu:~/git/mycode$ git commit -am "更新 子模块"
chunli@ubuntu:~/git/mycode$ git push


子模块-克隆
方法1: 手动克隆
chunli@ubuntu:~/git$ git clone https://gitlab.li-chunli.top:20443/root/mycode.git
chunli@ubuntu:~/git/mycode$ ll mycat/    # 可以看到此时子模块内容是空的
chunli@ubuntu:~/git/mycode$ git submodule init
chunli@ubuntu:~/git/mycode$ git submodule update --recursive
chunli@ubuntu:~/git/mycode$ ll mycat/    # 可以看出内容已经完整

方法1: 递归克隆
chunli@ubuntu:~/git$ git clone --recurse-submodules https://gitlab.li-chunli.top:20443/root/mycode.git
chunli@ubuntu:~/git$ cd mycode/
chunli@ubuntu:~/git/mycode$ ll mycat/   # 可以看出内容已经完整
chunli@ubuntu:~/git/mycode$

子模块-删除
chunli@ubuntu:~/git/mycode$ git rm -rf mycat/
chunli@ubuntu:~/git/mycode$ git rm -rf .gitmodules
chunli@ubuntu:~/git/mycode$ git status  # 提示两项被删除
chunli@ubuntu:~/git/mycode$ git commit -m "删除 子模块"
chunli@ubuntu:~/git/mycode$ git push
chunli@ubuntu:~/git/mycode$

git subtree 子模块

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准备两个仓库, 将mycat放入mycode中:
https://gitlab.li-chunli.top:20443/root/mycode.git
https://gitlab.li-chunli.top:20443/root/mycat.git


添加 subtree  --squash 避免日志污染
chunli@ubuntu:~/git$ git clone https://gitlab.li-chunli.top:20443/root/mycode.git
chunli@ubuntu:~/git$ cd mycode/
chunli@ubuntu:~/git/mycode$ git remote  add origin_cat https://gitlab.li-chunli.top:20443/root/mycat.git $
chunli@ubuntu:~/git/mycode$ git subtree add --prefix=modules_cat  origin_cat master          #[添加] 拉取到本地
chunli@ubuntu:~/git/mycode$ git subtree add --prefix=modules_cat  origin_cat master --squash #[添加] 也可以这样写 squash加不加，以后要一致
chunli@ubuntu:~/git/mycode$ git subtree add --prefix=modules_cat  git_url    master --squash #[添加] 也可以直接带上url，不推荐
chunli@ubuntu:~/git/mycode$ git subtree add -P       modules_cat  origin_cat master --squash #[添加] 也可以这样写 -P --prefix


子项目有更新，拉取到本地
chunli@ubuntu:~/git/mycode$ git subtree pull --prefix=modules_cat  origin_cat master --squash # 拉取到本地
chunli@ubuntu:~/git/mycode$ git subtree pull --prefix=modules_cat  URL        master --squash # 或者指定URL


本地对子项目的修改，推送
chunli@ubuntu:~/git/mycode$ git add xxx                                                         # 修改了子项目的代码
chunli@ubuntu:~/git/mycode$ git commit -m "xxxxx"                                               # 提交修改
chunli@ubuntu:~/git/mycode$ git push                                                            # 提交到远程
chunli@ubuntu:~/git/mycode$ git subtree push --prefix=modules_cat origin_cat  master --squash   # 提交到远程
chunli@ubuntu:~/git/mycode$ git subtree push --prefix=modules_cat URL         master --squash   # 或者指定URL


克隆的项目已经存在subtree子模块[关联/更新/推送/]
chunli@ubuntu:~/git/mycode$ git remote  add origin_cat https://gitlab.li-chunli.top:20443/root/mycat.git  # 设置关联
chunli@ubuntu:~/git/mycode$ git subtree pull --prefix=modules_cat  origin_cat master --squash             # 拉取到本地
chunli@ubuntu:~/git/mycode$ git subtree push --prefix=modules_cat  origin_cat master --squash             # 提交到远程

拉取 fork 更新

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root@singapore:~/libevent# git clone   https://github.com/li-chunli/libevent.git
root@singapore:~/libevent# cd  libevent/
root@singapore:~/libevent# git remote add upstream https://github.com/libevent/libevent.git
root@singapore:~/libevent# git fetch upstream
root@singapore:~/libevent# git branch -avv    #查看分支
* master                                    5ee507c8 [origin/master] http: implement separate timeouts for read/write/connect phase
  remotes/origin/21_http_extended_methodcmp 35487dc5  Added http method extending, based on work by  @miniupnp
  remotes/origin/HEAD                       -> origin/master
  remotes/origin/master                     5ee507c8 http: implement separate timeouts for read/write/connect phase
  remotes/origin/patches-1.4                46a1375b evhttp: fix leak from keep-alive disconnect or read/write timeout
  remotes/origin/patches-2.0                4294867c Bump version to 2.0.23-beta
  remotes/origin/patches-2.1                d44eb473 Merge 'official/pr/761' into patches-2.1 -- changelog fixes
  remotes/upstream/master                   0d2f1700 Merge #976 -- symbols check build fixes
  remotes/upstream/patches-1.4              46a1375b evhttp: fix leak from keep-alive disconnect or read/write timeout
  remotes/upstream/patches-2.0              19e839c7 Make it build using OpenSSL 1.1.0
  remotes/upstream/patches-2.1              4c908dde Merge branch 'release-2.1.11-stable-pull' into patches-2.1
root@singapore:~/libevent#

然后查看远程库信息
root@singapore:~/libevent# git remote show
origin
upstream
root@singapore:~/libevent#
root@singapore:~/libevent# git remote show origin
* remote origin
  Fetch URL: https://github.com/li-chunli/libevent.git
  Push  URL: https://github.com/li-chunli/libevent.git
  HEAD branch: master
  Remote branches:
    21_http_extended_methodcmp tracked
    master                     tracked
    patches-1.4                tracked
    patches-2.0                tracked
    patches-2.1                tracked
  Local branch configured for 'git pull':
    master merges with remote master
  Local ref configured for 'git push':
    master pushes to master (up to date)
root@singapore:~/libevent#
root@singapore:~/libevent#
root@singapore:~/libevent#
root@singapore:~/libevent# git remote show upstream
* remote upstream
  Fetch URL: https://github.com/libevent/libevent.git
  Push  URL: https://github.com/libevent/libevent.git
  HEAD branch: master
  Remote branches:
    master      tracked
    patches-1.4 tracked
    patches-2.0 tracked
    patches-2.1 tracked
  Local ref configured for 'git push':
    master pushes to master (local out of date)
root@singapore:~/libevent#

新旧仓库 关联推送

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# 较新的代码仓库
git clone  git@192.168.20.98:dpi_tools/newflow.git
git  checkout REGEX  #检出待推送的分支


# 较旧的代码仓库
git  remote add  back git@192.168.101.23:infra/newflow.git
git  fetch back   #拉取到本地 但不检出


# 将新的仓库分支  推送到 旧的仓库分支
git push -u back REGEX


# 已完成同步