Git 安装部署的详细说明

1、官网安装 https://git-scm.com/downloads

2、创建本地版本库

Administrator@ThinkPadX1-Youga MINGW64 ~
$ pwd
/c/Users/Administrator

Administrator@ThinkPadX1-Youga MINGW64 ~
$ cd d:

Administrator@ThinkPadX1-Youga MINGW64 /d
$ pwd
/d

Administrator@ThinkPadX1-Youga MINGW64 /d
$ mkdir git_repository

Administrator@ThinkPadX1-Youga MINGW64 /d
$ cd git_repository

Administrator@ThinkPadX1-Youga MINGW64 /d/git_repository
$ pwd
/d/git_repository

3、设置登录用户与邮箱

Administrator@ThinkPadX1-Youga MINGW64 /d
$ git config --global user.name xxx  -----登录用户

Administrator@ThinkPadX1-Youga MINGW64 /d
$ git config --global user.email xxx@139.com   -----登录邮箱

Administrator@ThinkPadX1-Youga MINGW64 /d
$ cd TestSoftware/

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware
$ cd git_repository/

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository
$ pwd
/d/TestSoftware/git_repository

4、初始化版本库

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository
$ git init
Initialized empty Git repository in D:/TestSoftware/git_repository/.git/

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ pwd
/d/TestSoftware/git_repository

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ ls -ah
./  ../  .git/

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ pwd
/d/TestSoftware/git_repository

5、在版本库文件夹内创建readme.txt，并提交

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git add readme.txt
fatal: pathspec 'readme.txt' did not match any files 

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git add readme.txt

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git commit -m "wrote a readme file2"
[master f94d02b] wrote a readme file2
 1 file changed, 3 insertions(+)

6、更新多次文件内容

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git add readme.txt

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git commit -m "append GPL"
[master 195f5c9] append GPL
 1 file changed, 3 insertions(+), 1 deletion(-)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git add readme.txt

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git commit -m "append friend"
[master 77f50d5] append friend
 1 file changed, 3 insertions(+), 1 deletion(-)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git log
commit 77f50d59e515a5b64e57f5fb66a7be9cf5bc1c93 (HEAD -> master)
Author: xxx <xxx@139.com>
Date:   Tue Jan 26 10:36:37 2021 +0800

    append friend

commit 195f5c95037a8259a5e1e2dea6f031d8418672be
Author: xxx <xxx@139.com>
Date:   Tue Jan 26 10:35:07 2021 +0800

    append GPL

commit f94d02b835bcc03025b1978fa62f8795d4d1e1a0
Author: xxx <xxx@139.com>
Date:   Tue Jan 26 10:33:27 2021 +0800

    wrote a readme file2

commit 9ae196987e826988ddc7ac65b3dc55cf3134644b
Author: xxx <xxx@139.com>
Date:   Tue Jan 26 10:32:05 2021 +0800

    wrote a readme file

7、回退版本和恢复版本

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git log --pretty=oneline
77f50d59e515a5b64e57f5fb66a7be9cf5bc1c93 (HEAD -> master) append friend
195f5c95037a8259a5e1e2dea6f031d8418672be append GPL
f94d02b835bcc03025b1978fa62f8795d4d1e1a0 wrote a readme file2
9ae196987e826988ddc7ac65b3dc55cf3134644b wrote a readme file

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git reset --hard HEAD^
HEAD is now at 195f5c9 append GPL

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git log
commit 195f5c95037a8259a5e1e2dea6f031d8418672be (HEAD -> master)
Author: xxx <xxx.com>
Date:   Tue Jan 26 10:35:07 2021 +0800

    append GPL

commit f94d02b835bcc03025b1978fa62f8795d4d1e1a0
Author: xxx <xxx@139.com>
Date:   Tue Jan 26 10:33:27 2021 +0800

    wrote a readme file2

commit 9ae196987e826988ddc7ac65b3dc55cf3134644b
Author: xxx <xxx@139.com>
Date:   Tue Jan 26 10:32:05 2021 +0800

    wrote a readme file

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git reset --hard 77f5
HEAD is now at 77f50d5 append friend

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ cat readme.txt
111
2222
3333
Git is a distributed version control system.
Git is free software distributed under the GPL.

Git is a friend
Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$

8、删除文件

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git add test1.txt

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git commit -m 'add test'
[master dd7f462] add test
 1 file changed, 1 insertion(+)
 create mode 100644 test1.txt

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ rm test.txt
rm: cannot remove 'test.txt': No such file or directory

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git status
On branch master
nothing to commit, working tree clean

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git rm test1.txt
rm 'test1.txt'

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git commit -m 'remove test1.txt'
[master 1cc8b9d] remove test1.txt
 1 file changed, 1 deletion(-)
 delete mode 100644 test1.txt

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ ll
total 1
-rw-r--r-- 1 Administrator 197121 176 Jan 26 11:33 readme.txt

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$

9、git设置连接远程仓库

1、git创建repository,输入name，提交

2、获取key

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ ssh -T git@github.com
git@github.com: Permission denied (publickey).

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ ssh-keygen -t rsa -C "yourName"
Generating public/private rsa key pair.
Enter file in which to save the key (/c/Users/Administrator/.ssh/id_rsa):
/c/Users/Administrator/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /c/Users/Administrator/.ssh/id_rsa
Your public key has been saved in /c/Users/Administrator/.ssh/id_rsa.pub #  ---秘钥存放处
The key fingerprint is:
SHA256:c3a0gzpjLHqXZP4Rgct3urOfsnjJwAH4EO6OLik2Waw yourName
The key's randomart image is:
+---[RSA 3072]----+
|    .o           |
|   .o .  .       |
|    .o .. . .    |
|   .  .... + .   |
|  . .  .S.* =    |
|   =   .=* = .   |
| .= . .+*+o.     |
|+E   ..o++*o .   |
|o.o .. ..o=*o    |
+----[SHA256]-----+
Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ cat /c/Users/Administrator/.ssh/id_rsa.pub

3、设置key，输入key名字和生成秘钥

4、本地加载秘钥，

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ eval "$(ssh-agent -s)"
Agent pid 715

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ ssh-add
Identity added: /c/Users/Administrator/.ssh/id_rsa (CjwRiver)

5、重新推送

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git push -u origin master
Enumerating objects: 25, done.
Counting objects: 100% (25/25), done.
Delta compression using up to 4 threads
Compressing objects: 100% (15/15), done.
Writing objects: 100% (25/25), 1.89 KiB | 483.00 KiB/s, done.
Total 25 (delta 5), reused 0 (delta 0), pack-reused 0
remote: Resolving deltas: 100% (5/5), done.
To github.com:xxx/learngit.git
 * [new branch]      master -> master
Branch 'master' set up to track remote branch 'master' from 'origin'.

10、git设置克隆远程仓库

$ git clone git@github.com:xxx/xxx.git   -------远程仓库地址
Cloning into 'gitskills'...
remote: Enumerating objects: 3, done.
remote: Counting objects: 100% (3/3), done.
remote: Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
Receiving objects: 100% (3/3), done.

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ cd gitskills

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository/gitskills (main)
$ ls
README.md

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository/gitskills (main)
$ cat README.md
# gitskills
gitkills,learn down

11、分支管理

1、创建分支和合并

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master) ----master分支下有两个文件
$ ll
total 1
drwxr-xr-x 1 Administrator 197121   0 Jan 27 09:54 gitskills/
-rw-r--r-- 1 Administrator 197121 176 Jan 26 11:33 readme.txt

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git checkout -b dev                  ------创建并切换到dev分支  -b是切换
Switched to a new branch 'dev'

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (dev)
$ git branch                  ----查看当前分支
* dev
  master

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (dev)
$ git add readme.txt            ---修改readme.txt ，新增【Creating a new branch is quick.】

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (dev)
$ git commit -m 'branch test'  --- dev分支上提交
[dev 3e866eb] branch test
 1 file changed, 2 insertions(+), 1 deletion(-)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (dev)
$ git checkout master  ---切换master
Switched to branch 'master'
Your branch is up to date with 'origin/master'.

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ cat readme.txt    ---查看readme.txt内容，没有变
111
2222
3333
Git is a distributed version control system.
Git is free software distributed under the GPL.
Git is a friend
Git has a mutable index called stage.
444
555
Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git merge dev   ----合并分支。
Updating 1cc8b9d..3e866eb
Fast-forward    ----这里指的是快速合并
 readme.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ cat readme.txt   ----合并之后查看readme.txt内容
111
2222
3333
Git is a distributed version control system.
Git is free software distributed under the GPL.
Git is a friend
Git has a mutable index called stage.
444
555
Creating a new branch is quick.
Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git branch -d dev  ----删除分支dev，
Deleted branch dev (was 3e866eb).

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git branch    ----查看当前分支
* master

2、分支冲突解决

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git switch -c feature1    -----创建新的分支
Switched to a new branch 'feature1'

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (feature1)
$ git add readme.txt  ----修改readme.txt文件，提交

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (feature1)
$ git commit -m 'and simple'
[feature1 b5b24d9] and simple
 1 file changed, 1 insertion(+), 1 deletion(-)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (feature1)
$ git switch master  ----切换master
Switched to branch 'master'
Your branch is ahead of 'origin/master' by 1 commit.
  (use "git push" to publish your local commits)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git add readme.txt   ---同样修改readme.txt文件后，再次提交

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git commit -m '& simple'
[master cde2079] & simple
 1 file changed, 1 insertion(+), 1 deletion(-)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git merge feature1   ----合并看看，Git告诉我们，readme.txt文件存在冲突，必须手动解决冲突后再提交。
Auto-merging readme.txt
CONFLICT (content): Merge conflict in readme.txt
Automatic merge failed; fix conflicts and then commit the result.

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master|MERGING)
$ git status  -----git status也可以告诉我们冲突的文件：
On branch master
Your branch is ahead of 'origin/master' by 2 commits.
  (use "git push" to publish your local commits)

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:   readme.txt

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        gitskills/

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

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master|MERGING)
$ cat readme.txt   ---查看readme.txt的内容：
111
2222
3333
Git is a distributed version control system.
Git is free software distributed under the GPL.
Git is a friend
Git has a mutable index called stage.
444
555
<<<<<<< HEAD
Creating a new branch is quick & simple.
=======
Creating a new branch is quick AND simple.
>>>>>>> feature1

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master|MERGING)
$ git add readme.txt  ---再次修改保存后提交

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master|MERGING)
$ git commit -m 'conflict fixed'
[master 3d5f936] conflict fixed

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git log
commit 3d5f936a2fe2e440521d29346023fb078bee99b2 (HEAD -> master)
Merge: cde2079 b5b24d9
Author: cjw <18813048840@139.com>
Date:   Wed Jan 27 11:34:44 2021 +0800

    conflict fixed

commit cde20792faa9effeebcdd3292c17c39732f55429
Author: cjw <18813048840@139.com>
Date:   Wed Jan 27 11:32:32 2021 +0800

    & simple

commit b5b24d95cd22cc8d32dea7431fa90e0f72a52bbc (feature1)
Author: cjw <18813048840@139.com>
Date:   Wed Jan 27 11:30:45 2021 +0800

    and simple

commit 3e866ebbef42f9353276dc24be01ef1aa629cc42
Author: cjw <18813048840@139.com>
Date:   Wed Jan 27 10:10:04 2021 +0800


Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git branch -d feature1  ----删除分支
Deleted branch feature1 (was b5b24d9).

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git log --graph --pretty=oneline --abbrev-commit  ---带参数的git log也可以看到分支的合并
*   3d5f936 (HEAD -> master) conflict fixed
|
| * b5b24d9 and simple
* | cde2079 & simple
|/
* 3e866eb branch test
* 1cc8b9d (origin/master) remove test1.txt
* dd7f462 add test
* f020c25 status
* 1a58908 update 2
* ed66b14 index called
* 77f50d5 append friend
* 195f5c9 append GPL
* f94d02b wrote a readme file2
* 9ae1969 wrote a readme file

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ q
bash: q: command not found

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ cat readme.txt
111
2222
3333
Git is a distributed version control system.
Git is free software distributed under the GPL.
Git is a friend
Git has a mutable index called stage.
444
555
<<<<<<< HEAD
Creating a new branch is quick & simple.
=======
Creating a new branch is quick AND simple.
>>>>>>> feature1

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$

3、分支管理策略

合并分支时，如果可能，Git会用Fast forward模式，但这种模式下，删除分支后，会丢掉分支信息。
如果要强制禁用Fast forward模式，Git就会在merge时生成一个新的commit，这样，从分支历史上就可以看出分支信息。

下面我们实战一下--no-ff方式的git merge：
首先，仍然创建并切换dev分支：

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git switch -c dev
Switched to a new branch 'dev'

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (dev)
$ git add readme.txt

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (dev)
$ git commit -m 'add test1'
[dev 3c0c8ed] add test1
 1 file changed, 2 insertions(+)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (dev)
$ git switch master
Switched to branch 'master'
Your branch is ahead of 'origin/master' by 4 commits.
  (use "git push" to publish your local commits)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git merge --no-ff -m "merge with no-ff" dev
Merge made by the 'recursive' strategy.
 readme.txt | 2 ++
 1 file changed, 2 insertions(+)

Administrator@ThinkPadX1-Youga MINGW64 /d/TestSoftware/git_repository (master)
$ git log --graph --pretty=oneline --abbrev-commit
*   6809576 (HEAD -> master) merge with no-ff
|
| * 3c0c8ed (dev) add test1
|/
*   3d5f936 conflict fixed
|
| * b5b24d9 and simple
* | cde2079 & simple
|/
* 3e866eb branch test
* 1cc8b9d (origin/master) remove test1.txt
* dd7f462 add test
* f020c25 status
* 1a58908 update 2
* ed66b14 index called
* 77f50d5 append friend
* 195f5c9 append GPL
* f94d02b wrote a readme file2
* 9ae1969 wrote a readme file

总结：合并分支时，加上--no-ff参数就可以用普通模式合并，合并后的历史有分支，能看出来曾经做过合并，而fast forward合并就看不出来曾经做过合并。

4、多人协作

1. 首先，可以试图用git push origin 推送自己的修改；

2. 如果推送失败，则因为远程分支比你的本地更新，需要先用git pull试图合并；

3. 如果合并有冲突，则解决冲突，并在本地提交；

4. 没有冲突或者解决掉冲突后，再用git push origin 推送就能成功！

5. 如果git pull提示no tracking information，则说明本地分支和远程分支的链接关系没有创建，用命令git branch --set-upstream-to origin/。

6. 这就是多人协作的工作模式，一旦熟悉了，就非常简单。

小结:

•   查看远程库信息，使用git remote -v；
  

•   本地新建的分支如果不推送到远程，对其他人就是不可见的；
  

•   从本地推送分支，使用git push origin branch-name，如果推送失败，先用git pull抓取远程的新提交；
  

•   在本地创建和远程分支对应的分支，使用git checkout -b branch-name origin/branch-name，本地和远程分支的名称最好一致；
  

•   建立本地分支和远程分支的关联，使用git branch --set-upstream branch-name origin/branch-name；
  

•   从远程抓取分支，使用git pull，如果有冲突，要先处理冲突。
  

以上资料来自廖雪峰git资料