你是否遇到过这样的问题：
你的客户在你们这边做了N个项目，而项目之间又存在着某些业务关联(数据库访问等)
之前你可能是这样处理的，为客户的每个项目创建单独的Git版本
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你是否有想过有其他的解决方法呢？比如在同一个Git仓库对所有项目进行统一管理呢，那么该怎么使用Git来做到统一管理而又不会影响到各项目的工作呢？
当然使用万能的Git分支完全可以满足你这么个性化要求(以分支的形式管理不同项目)
首页你需要分支是必须要创建的吧(对应不同的项目)
那么问题来了，后创建的分支默认是以当前分支为父分支的，像下面这样:"master-dev"的父分支是master
既然Git在创建是默认给我们的新分支指定了父亲，那么可不可以在创建是不需要呢？
强大的Git同样提供了解决方法(创建时提供--orphan 参数即可)：git checkout --orphan 分支名
注意：
尽管创建分支时没有了父分支，但创建成功后，原分支的文件会在创建时添加到当前暂存区的，所以需要移除（不需要的情况下）
然后再将原分支的文件从当前分支仓库中移除，这样你的分支里的文件对于其他分支来说就是独一无二的了(即使不移除原分支的文件，此文件也是新添加到当前分支的，所以跟其他分支没有任何关系)
而其他分支也完全不可能会影响你当前分支的工作(不存在依赖关系的前提下)
当切换到PC分支时，Git仓库里的文件也会发生变化，也就实现了我们的目的
不同的分支其实就是不同的目录和文件，跟其他分支没有关系的
提交记录应该是这样子的
可以看到下面pc分支的提交连接线(蓝色)跟其他的连接线(绿色)是不同的
master-dev是在master上创建的子分支(存在依赖关系)
以同样的方式创建分支mobile,同样没有父亲，git checkout --orphan mobile
然后在不同分支进行模拟提交,那么提交记录就有可能是这样的
应用场景不同，请谨慎使用，否则提交历史将惨不忍睹
最终的Git分支和对应的目录及文件是这样的,现在你可以在一个Git里愉快的玩耍了
技术有风险使用请谨慎
技术有风险使用请谨慎
技术有风险使用请谨慎
重要的事情说三遍
举个栗子：
F:DemoD11>tree /F
文件夹 PATH 列表
卷序列号为 A627-5B49
F:.
└─master
main.txt
F:DemoD11>git status
fatal: Not a git repository (or any of the parent directories): .git
F:DemoD11>git init
Initialized empty Git repository in F:/Demo/D11/.git/
F:DemoD11>git status
On branch master
Initial commit
Untracked files:
(use "git add <file>..." to include in what will be committed)
master/
nothing added to commit but untracked files present (use "git add" to track)
F:DemoD11>git add --all
F:DemoD11>git status
On branch master
Initial commit
Changes to be committed:
(use "git rm --cached <file>..." to unstage)
new file: master/main.txt
F:DemoD11>git commit -a -m "master branch init"
[master (root-commit) 3ae67eb] master branch init
1 file changed, 1 insertion(+)
create mode 100644 master/main.txt
F:DemoD11>git commit -a -m "master edit"
[master 60197ce] master edit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git checkout -b "master-dev"
Switched to a new branch 'master-dev'
F:DemoD11>git status
On branch master-dev
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: master/main.txt
no changes added to commit (use "git add" and/or "git commit -a")
F:DemoD11>git commit -a -m "master-dev edit"
[master-dev 67837dd] master-dev edit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git show-branch
! [master] master edit
* [master-dev] master-dev edit
--
* [master-dev] master-dev edit
+* [master] master edit
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* 67837dd (HEAD, master-dev) master-dev edit
* 60197ce (master) master edit
* 3ae67eb master branch init
F:DemoD11>git citool
F:DemoD11>git checkout --orphan pc
Switched to a new branch 'pc'
F:DemoD11>git status
On branch pc
Initial commit
Changes to be committed:
(use "git rm --cached <file>..." to unstage)
new file: master/main.txt
Untracked files:
(use "git add <file>..." to include in what will be committed)
pc/
F:DemoD11>git rm -r master/
rm 'master/main.txt'
F:DemoD11>RD /S master/
f:demod11master, 是否确认(Y/N)? Y
F:DemoD11>tree /F
文件夹 PATH 列表
卷序列号为 A627-5B49
F:.
└─pc
pc.txt
F:DemoD11>git add --all
F:DemoD11>git commit -a -m "pc/pc init"
[pc (root-commit) 3e176c6] pc/pc init
1 file changed, 1 insertion(+)
create mode 100644 pc/pc.txt
F:DemoD11>git show-branch
! [master] master edit
! [master-dev] master-dev edit
* [pc] pc/pc init
---
* [pc] pc/pc init
+ [master-dev] master-dev edit
++ [master] master edit
++ [master^] master branch init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* 3e176c6 (HEAD, pc) pc/pc init
* 67837dd (master-dev) master-dev edit
* 60197ce (master) master edit
* 3ae67eb master branch init
F:DemoD11>git status
On branch pc
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: pc/pc.txt
no changes added to commit (use "git add" and/or "git commit -a")
F:DemoD11>git commit -a -m "pc edit"
[pc d1f98d3] pc edit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git commit -a -m "pc reedit"
[pc 2fd85bf] pc reedit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git show-branch
! [master] master edit
! [master-dev] master-dev edit
* [pc] pc reedit
---
* [pc] pc reedit
* [pc^] pc edit
* [pc~2] pc/pc init
+ [master-dev] master-dev edit
++ [master] master edit
++ [master^] master branch init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* 2fd85bf (HEAD, pc) pc reedit
* d1f98d3 pc edit
* 3e176c6 pc/pc init
* 67837dd (master-dev) master-dev edit
* 60197ce (master) master edit
* 3ae67eb master branch init
F:DemoD11>git checkout "master-dev"
Switched to branch 'master-dev'
F:DemoD11>git diff
WARNING: terminal is not fully functional
diff --git a/master/main.txt b/master/main.txt
index 75bf703..5a345f8 100644
--- a/master/main.txt
+++ b/master/main.txt
@@ -2,4 +2,6 @@ main/main init
master edit
-master-dev edit
No newline at end of file
+master-dev edit
+master-dev reedit
+
F:DemoD11>git commit -a -m "master-dev reedit"
[master-dev 67cec74] master-dev reedit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git show-branch
! [master] master edit
* [master-dev] master-dev reedit
! [pc] pc reedit
---
* [master-dev] master-dev reedit
* [master-dev^] master-dev edit
+* [master] master edit
+* [master^] master branch init
+ [pc] pc reedit
+ [pc^] pc edit
+ [pc~2] pc/pc init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* 67cec74 (HEAD, master-dev) master-dev reedit
* 67837dd master-dev edit
* 60197ce (master) master edit
* 3ae67eb master branch init
* 2fd85bf (pc) pc reedit
* d1f98d3 pc edit
* 3e176c6 pc/pc init
F:DemoD11>git checkout master
Switched to branch 'master'
F:DemoD11>git commit -a -m "master reedit"
[master b79efa5] master reedit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git show-branch
* [master] master reedit
! [master-dev] master-dev reedit
! [pc] pc reedit
---
* [master] master reedit
+ [master-dev] master-dev reedit
+ [master-dev^] master-dev edit
*+ [master^] master edit
*+ [master~2] master branch init
+ [pc] pc reedit
+ [pc^] pc edit
+ [pc~2] pc/pc init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* b79efa5 (HEAD, master) master reedit
| * 67cec74 (master-dev) master-dev reedit
| * 67837dd master-dev edit
|/
* 60197ce master edit
* 3ae67eb master branch init
* 2fd85bf (pc) pc reedit
* d1f98d3 pc edit
* 3e176c6 pc/pc init
F:DemoD11>git citool
F:DemoD11>git checkout pc
Switched to branch 'pc'
F:DemoD11>git commit -a -m "pc re-reedit"
[pc 1d24c39] pc re-reedit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git show-branch
! [master] master reedit
! [master-dev] master-dev reedit
* [pc] pc re-reedit
---
* [pc] pc re-reedit
* [pc^] pc reedit
* [pc~2] pc edit
* [pc~3] pc/pc init
+ [master] master reedit
+ [master-dev] master-dev reedit
+ [master-dev^] master-dev edit
++ [master^] master edit
++ [master~2] master branch init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* 1d24c39 (HEAD, pc) pc re-reedit
* 2fd85bf pc reedit
* d1f98d3 pc edit
* 3e176c6 pc/pc init
* b79efa5 (master) master reedit
| * 67cec74 (master-dev) master-dev reedit
| * 67837dd master-dev edit
|/
* 60197ce master edit
* 3ae67eb master branch init
F:DemoD11>git checkout --orphan mobile
Switched to a new branch 'mobile'
F:DemoD11>git status
On branch mobile
Initial commit
Changes to be committed:
(use "git rm --cached <file>..." to unstage)
new file: pc/pc.txt
Untracked files:
(use "git add <file>..." to include in what will be committed)
mobile/
F:DemoD11>tree /F
文件夹 PATH 列表
卷序列号为 A627-5B49
F:.
├─mobile
│ mobile.txt
│
└─pc
F:DemoD11>RD /S f:demod11pc
f:demod11pc, 是否确认(Y/N)? Y
F:DemoD11>tree /F
文件夹 PATH 列表
卷序列号为 A627-5B49
F:.
└─mobile
mobile.txt
F:DemoD11>git status
On branch mobile
Initial commit
Changes to be committed:
(use "git rm --cached <file>..." to unstage)
new file: pc/pc.txt
Changes not staged for commit:
(use "git add/rm <file>..." to update what will be committed)
(use "git checkout -- <file>..." to discard changes in working directory)
deleted: pc/pc.txt
Untracked files:
(use "git add <file>..." to include in what will be committed)
mobile/
F:DemoD11>git rm -r pc/
rm 'pc/pc.txt'
F:DemoD11>git status
On branch mobile
Initial commit
Untracked files:
(use "git add <file>..." to include in what will be committed)
mobile/
nothing added to commit but untracked files present (use "git add" to track)
F:DemoD11>git add --all
F:DemoD11>git commit -a -m "pc/pc master init"
[mobile (root-commit) a94d110] pc/pc master init
1 file changed, 1 insertion(+)
create mode 100644 mobile/mobile.txt
F:DemoD11>git show-branch
! [master] master reedit
! [master-dev] master-dev reedit
* [mobile] pc/pc master init
! [pc] pc re-reedit
----
* [mobile] pc/pc master init
+ [pc] pc re-reedit
+ [pc^] pc reedit
+ [pc~2] pc edit
+ [pc~3] pc/pc init
+ [master] master reedit
+ [master-dev] master-dev reedit
+ [master-dev^] master-dev edit
++ [master^] master edit
++ [master~2] master branch init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* a94d110 (HEAD, mobile) pc/pc master init
* 1d24c39 (pc) pc re-reedit
* 2fd85bf pc reedit
* d1f98d3 pc edit
* 3e176c6 pc/pc init
* b79efa5 (master) master reedit
| * 67cec74 (master-dev) master-dev reedit
| * 67837dd master-dev edit
|/
* 60197ce master edit
* 3ae67eb master branch init
F:DemoD11>git show-branch
! [master] master reedit
! [master-dev] master-dev reedit
* [mobile] pc/pc master init
! [pc] pc re-reedit
----
* [mobile] pc/pc master init
+ [pc] pc re-reedit
+ [pc^] pc reedit
+ [pc~2] pc edit
+ [pc~3] pc/pc init
+ [master] master reedit
+ [master-dev] master-dev reedit
+ [master-dev^] master-dev edit
++ [master^] master edit
++ [master~2] master branch init
F:DemoD11>git commit -a -m "mobile edit"
[mobile de5452e] mobile edit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git commit -a -m "mobile re-edit"
[mobile 70dc006] mobile re-edit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git show-branch
! [master] master reedit
! [master-dev] master-dev reedit
* [mobile] mobile re-edit
! [pc] pc re-reedit
----
* [mobile] mobile re-edit
* [mobile^] mobile edit
* [mobile~2] pc/pc master init
+ [pc] pc re-reedit
+ [pc^] pc reedit
+ [pc~2] pc edit
+ [pc~3] pc/pc init
+ [master] master reedit
+ [master-dev] master-dev reedit
+ [master-dev^] master-dev edit
++ [master^] master edit
++ [master~2] master branch init
F:DemoD11>
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* 70dc006 (HEAD, mobile) mobile re-edit
* de5452e mobile edit
* a94d110 pc/pc master init
* 1d24c39 (pc) pc re-reedit
* 2fd85bf pc reedit
* d1f98d3 pc edit
* 3e176c6 pc/pc init
* b79efa5 (master) master reedit
| * 67cec74 (master-dev) master-dev reedit
| * 67837dd master-dev edit
|/
* 60197ce master edit
* 3ae67eb master branch init
F:DemoD11>git checkout "master-dev"
Switched to branch 'master-dev'
F:DemoD11>git commit -a -m "master-dev re-reedit"
[master-dev 1c57e77] master-dev re-reedit
1 file changed, 2 insertions(+)
F:DemoD11>git show-branch
! [master] master reedit
* [master-dev] master-dev re-reedit
! [mobile] mobile re-edit
! [pc] pc re-reedit
----
* [master-dev] master-dev re-reedit
* [master-dev^] master-dev reedit
* [master-dev~2] master-dev edit
+ [mobile] mobile re-edit
+ [mobile^] mobile edit
+ [mobile~2] pc/pc master init
+ [pc] pc re-reedit
+ [pc^] pc reedit
+ [pc~2] pc edit
+ [pc~3] pc/pc init
+ [master] master reedit
+* [master-dev~3] master edit
+* [master-dev~4] master branch init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* 1c57e77 (HEAD, master-dev) master-dev re-reedit
* 67cec74 master-dev reedit
* 67837dd master-dev edit
| * 70dc006 (mobile) mobile re-edit
| * de5452e mobile edit
| * a94d110 pc/pc master init
| * 1d24c39 (pc) pc re-reedit
| * 2fd85bf pc reedit
| * d1f98d3 pc edit
| * 3e176c6 pc/pc init
| * b79efa5 (master) master reedit
|/
* 60197ce master edit
* 3ae67eb master branch init
F:DemoD11>git checkout master
Switched to branch 'master'
F:DemoD11>git commit -a -m "master re-reedit"
[master a0a0f1a] master re-reedit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git show-branch
* [master] master re-reedit
! [master-dev] master-dev re-reedit
! [mobile] mobile re-edit
! [pc] pc re-reedit
----
* [master] master re-reedit
* [master^] master reedit
+ [master-dev] master-dev re-reedit
+ [master-dev^] master-dev reedit
+ [master-dev~2] master-dev edit
*+ [master~2] master edit
*+ [master~3] master branch init
+ [mobile] mobile re-edit
+ [mobile^] mobile edit
+ [mobile~2] pc/pc master init
+ [pc] pc re-reedit
+ [pc^] pc reedit
+ [pc~2] pc edit
+ [pc~3] pc/pc init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* a0a0f1a (HEAD, master) master re-reedit
* b79efa5 master reedit
| * 1c57e77 (master-dev) master-dev re-reedit
| * 67cec74 master-dev reedit
| * 67837dd master-dev edit
|/
* 60197ce master edit
* 3ae67eb master branch init
* 70dc006 (mobile) mobile re-edit
* de5452e mobile edit
* a94d110 pc/pc master init
* 1d24c39 (pc) pc re-reedit
* 2fd85bf pc reedit
* d1f98d3 pc edit
* 3e176c6 pc/pc init
F:DemoD11>git checkout pc
Deletion of directory 'master' failed. Should I try again? (y/n) n
Switched to branch 'pc'
F:DemoD11>git status
On branch pc
nothing to commit, working directory clean
F:DemoD11>git commit -a -m "pc re-re-reedit"
[pc 0f657c0] pc re-re-reedit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>git show-branch
! [master] master re-reedit
! [master-dev] master-dev re-reedit
! [mobile] mobile re-edit
* [pc] pc re-re-reedit
----
* [pc] pc re-re-reedit
* [pc^] pc re-reedit
* [pc~2] pc reedit
* [pc~3] pc edit
* [pc~4] pc/pc init
+ [master] master re-reedit
+ [master^] master reedit
+ [master-dev] master-dev re-reedit
+ [master-dev^] master-dev reedit
+ [master-dev~2] master-dev edit
++ [master~2] master edit
++ [master~3] master branch init
+ [mobile] mobile re-edit
+ [mobile^] mobile edit
+ [mobile~2] pc/pc master init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* 0f657c0 (HEAD, pc) pc re-re-reedit
* 1d24c39 pc re-reedit
* 2fd85bf pc reedit
* d1f98d3 pc edit
* 3e176c6 pc/pc init
* a0a0f1a (master) master re-reedit
* b79efa5 master reedit
| * 1c57e77 (master-dev) master-dev re-reedit
| * 67cec74 master-dev reedit
| * 67837dd master-dev edit
|/
* 60197ce master edit
* 3ae67eb master branch init
* 70dc006 (mobile) mobile re-edit
* de5452e mobile edit
* a94d110 pc/pc master init
F:DemoD11>git checkout "master-dev"
Deletion of directory 'pc' failed. Should I try again? (y/n) n
Switched to branch 'master-dev'
F:DemoD11>git commit -a -m "master-dev re-re-reedit"
[master-dev a6be472] master-dev re-re-reedit
1 file changed, 1 insertion(+)
F:DemoD11>git show-branch
! [master] master re-reedit
* [master-dev] master-dev re-re-reedit
! [mobile] mobile re-edit
! [pc] pc re-re-reedit
----
* [master-dev] master-dev re-re-reedit
* [master-dev^] master-dev re-reedit
* [master-dev~2] master-dev reedit
* [master-dev~3] master-dev edit
+ [pc] pc re-re-reedit
+ [pc^] pc re-reedit
+ [pc~2] pc reedit
+ [pc~3] pc edit
+ [pc~4] pc/pc init
+ [master] master re-reedit
+ [master^] master reedit
+* [master-dev~4] master edit
+* [master-dev~5] master branch init
+ [mobile] mobile re-edit
+ [mobile^] mobile edit
+ [mobile~2] pc/pc master init
F:DemoD11>git tree --all
WARNING: terminal is not fully functional
* a6be472 (HEAD, master-dev) master-dev re-re-reedit
* 1c57e77 master-dev re-reedit
* 67cec74 master-dev reedit
* 67837dd master-dev edit
| * 0f657c0 (pc) pc re-re-reedit
| * 1d24c39 pc re-reedit
| * 2fd85bf pc reedit
| * d1f98d3 pc edit
| * 3e176c6 pc/pc init
| * a0a0f1a (master) master re-reedit
| * b79efa5 master reedit
|/
* 60197ce master edit
* 3ae67eb master branch init
* 70dc006 (mobile) mobile re-edit
* de5452e mobile edit
* a94d110 pc/pc master init
F:DemoD11>git checkout pc
Already on 'pc'
F:DemoD11>git commit -a -m "pc re-re-re-reedit"
[pc f906c94] pc re-re-re-reedit
1 file changed, 3 insertions(+), 1 deletion(-)
F:DemoD11>
参考：