1.说明git-worktree

git worktree 非常适合大型项目又需要维护多个分支，想要避免来回切换的情况

• 优点

  • git worktree 可以快速进行并行开发，同一个项目多个分支同时并行演进

  • git worktree 的提交可以在同一个项目中共享

  • git worktree 和单独 clone 项目相比，节省了硬盘空间，又因为git worktree使用hard link实现，要远远快于 clone

2.新增工作目录add

• 最简单的写法：
  git worktree add <新路径>
  将基于当前分支，新建一个 worktree 目录，新的分支名就是新建目录的名称。
• 新建一个指定分支
  git worktree add <新路径> -b <新分支名>
  将基于当前分支，新建一个 worktree 目录，新的分支名是指定的名称。
• 基于指定分支新建一个指定分支
  git worktree add <新路径> -b <新分支名> <指定分支名>
  将基于指定分支，新建一个 worktree 目录，新的分支名是指定的名称。

2-1.切换出指定分支

git worktree add ../<path_name> <branch>

2-1-1.查看元素工作目录

git worktree list

/Users/project_local/build  11669902 [release-1.3.x]

2-1-2.创建工作目录

git worktree add ../build_master master 

Preparing worktree (checking out 'master')
HEAD is now at 5d6f19ef xxxx to branch master

2-1-3.查看元素工作目录

git worktree list

/Users/project_local/build         11669902 [release-1.3.x]
/Users/project_local/build_master  5d6f19ef [master]

2-1-4.切换到build_master

cd ../build_master && git br

* master
+ release-1.3.x

2-1-5.查看branch信息

git branch -vv

* master        5d6f19ef [origin/master] 5d6f19ef xxxx to branch master
+ release-1.3.x 11669902 (/Users/project_local/build) [origin/release-1.3.x: behind 18] xxxx to branch release-1.3.x

2-2.-b/-B使用

git worktree add -b/-B <new_branch> ../<path_name> <branch>

• -b:如果有相同的分支名时，不会生成
• -B:如果有相同的分支名时，会把原来的覆盖变为worktree

2-2-1.使用-b切换

如果新建的分支名已经存在的话会报错

2-2-1-1.查看分支

git br

  ccc
+ master
* release-1.3.x

2-2-1-2.新建一个已有的分支名

git worktree add -b ccc ../build_ccc release-1.3.x

Preparing worktree (new branch 'ccc')
fatal: A branch named 'ccc' already exists.

2-2-1-3.新建一个不存在的分支名

git worktree add -b ddd ../build_ddd release-1.3.x

Preparing worktree (new branch 'ddd')
HEAD is now at 11669902 xxxxx to branch release-1.3.x

2-2-1-4.查看分支

cd ../build_ddd && git br

  ccc
* ddd
+ master
+ release-1.3.x

2-2-2.使用-B切换

如果新建分支名已经存在，会强制改变该分支

2-2-2-1.查看分支

git br

  ccc
+ master
* release-1.3.x

2-2-2-2.新建一个已有的分支名

git worktree add -B ccc ../build_ccc master

Preparing worktree (resetting branch 'ccc'; was at 5d6f19ef)
HEAD is now at 5d6f19ef xxxxx to branch master

2-2-2-3.查看分支

git br

+ ccc
+ master
* release-1.3.x

3.删除worktree

3-1.remove

移除一个工作区。只有干净的工作区（没有未跟踪的文件和未修改的跟踪文件）可以被删除。

脏工作区或有子模块的工作区可以用 -f 删除。主工作区不能被删除。

git worktree remove [-f] <path_name>

• -f:强制执行

3-1-1.查看worktree

git worktree list

/Users/project_local/build          11669902 [release-1.3.x]
/Users/project_local/build_ccc_new  5d6f19ef [ccc]
/Users/project_local/build_ddd      11669902 [ddd]
/Users/project_local/build_master   5d6f19ef [master]

3-1-2.删除某个worktree

git worktree remove build_ddd

3-1-3.查看worktree

git worktree list

/Users/project_local/build          11669902 [release-1.3.x]
/Users/project_local/build_ccc_new  5d6f19ef [ccc]
/Users/project_local/build_master   5d6f19ef [master]

3-2.prune

修剪$GIT_DIR/worktrees中的工作区信息。如果工作目录被手动删除了rm

git worktree prune [-n] [-v] [--expire <time>]

• -n:在使用prune时，不会删除任何文件；只会报告它要删除的东西。

• -v:使用prune，报告所有的移除情况。

• --expire <time>:使用 prune，只对超过<时间>未使用的工作区进行淘汰。

3-2-1.查看文件夹

cd ../ && ls -al

drwxr-xr-x   46 root  staff      1472 Jul 13 10:44 build
drwxr-xr-x   50 root  staff      1600 Jul 13 11:33 build_ccc_new
drwxr-xr-x   50 root  staff      1600 Jul 13 10:47 build_master

3-2-2.删除worktree文件夹

rm -rf build_ccc_new build_master

3-2-3.查看worktree

cd build && git worktree list 

/Users/project_local/build          11669902 [release-1.3.x]
/Users/project_local/build_ccc_new  5d6f19ef [ccc]
/Users/project_local/build_master   5d6f19ef [master]

3-2-4.使用prune

3-2-4-1.不删除，只查看

git worktree prune -n

Removing worktrees/build_master: gitdir file points to non-existent location
Removing worktrees/build_ccc: gitdir file points to non-existent location

3-2-4-2.删除并输出内容

git worktree prune -v

Removing worktrees/build_master: gitdir file points to non-existent location
Removing worktrees/build_ccc: gitdir file points to non-existent location

3-2-4-3.删除

git worktree prune

3-2-5.查看worktree

git worktree list

/Users/project_local/build  11669902 [release-1.3.x]

4.修改move

git worktree move <path_name> <new_path_name>

4-1.案例

4-1-1.查看worktree

git worktree list  

/Users/project_local/build         11669902 [release-1.3.x]
/Users/project_local/build_ccc     5d6f19ef [ccc]
/Users/project_local/build_ddd     11669902 [ddd]
/Users/project_local/build_master  5d6f19ef [master]

4-1-2.修改worktree

git worktree move build_ccc ../build_ccc_new

4-1-3.查看worktree

git worktree list

/Users/project_local/build          11669902 [release-1.3.x]
/Users/project_local/build_ccc_new  5d6f19ef [ccc]
/Users/project_local/build_ddd      11669902 [ddd]
/Users/project_local/build_master   5d6f19ef [master]

5.查看list

git worktree list [--porcelain]

• porcelain:详细显示

5-1.案列

5-1-2.普通显示

git worktree list

/Users/project_local/build         11669902 [release-1.3.x]
/Users/project_local/build_ccc     5d6f19ef [ccc]
/Users/project_local/build_ddd     11669902 [ddd]
/Users/project_local/build_master  5d6f19ef [master]

5-1-2.porcelain显示

git worktree list --porcelain

worktree /Users/project_local/build
HEAD 116699020d67237a27cafe67ef92128ff4d5d5e8
branch refs/heads/release-1.3.x

worktree /Users/project_local/build_ccc
HEAD 5d6f19efe800908192b9b94ac6362bd81db9daac
branch refs/heads/ccc

worktree /Users/project_local/build_ddd
HEAD 116699020d67237a27cafe67ef92128ff4d5d5e8
branch refs/heads/ddd

worktree /Users/project_local/build_master
HEAD 5d6f19efe800908192b9b94ac6362bd81db9daac
branch refs/heads/master

6.加锁/解锁worktree

6-1.lock

这也可以防止它被移动或删除。 可以选择用--reason选项来指定锁定的原因

git worktree lock [--reason <string>] <worktree>

• --reason:说明信息

6-1-1.无提示的锁

git worktree lock <path_name>

6-1-1-1.给build_ccc加锁

git worktree lock build_ccc

6-1-1-2.移除build_ccc

报错信息中没有lock reason

git worktree remove build_ccc

fatal: cannot remove a locked working tree;
use 'remove -f -f' to override or unlock first

6-1-2.增加信息reason

git worktree lock <path_name> <--reason="msg">

6-1-2-1.给build_ccc加锁并添加信息

git worktree lock --reason="test lock" build_ccc

6-1-2-2.移除build_ccc

无法删除，提示报错信息

git worktree remove build_ccc

fatal: cannot remove a locked working tree, lock reason: test lock
use 'remove -f -f' to override or unlock first

6-2.unlock

解锁一个工作区，允许它被修剪、移动或删除。

git worktree unlock <path_name>

# 给build_ccc解锁
git worktree unlock build_ccc