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                ### /.git/HEAD ~~~ ref: refs/heads/dev ~~~ 說明:記錄當前工作的分支,指向當前的工作分支(表示指向dev分支,即dev為當前工作的分支) ### /.git/refs/remotes/origin/HEAD ~~~ ref: refs/remotes/origin/master ~~~ 說明:記錄遠程倉庫指向的分支 ## 看下面的代碼記錄: ~~~ Administrator@USER-20160512VQ MINGW64 ~/desktop $ git clone https://github.com/xiasf/github-note Cloning into 'github-note'... remote: Counting objects: 40, done. remote: Total 40 (delta 0), reused 0 (delta 0), pack-reused 40 Unpacking objects: 100% (40/40), done. Administrator@USER-20160512VQ MINGW64 ~/desktop $ cd github-note Administrator@USER-20160512VQ MINGW64 ~/desktop/github-note (master) $ git branch * master Administrator@USER-20160512VQ MINGW64 ~/desktop/github-note (master) $ git branch -a * master remotes/origin/HEAD -> origin/master remotes/origin/dev remotes/origin/master Administrator@USER-20160512VQ MINGW64 ~/desktop/github-note (master) $ git branch -r origin/HEAD -> origin/master origin/dev origin/master Administrator@USER-20160512VQ MINGW64 ~/desktop/github-note (master) $ git checkout dev Branch dev set up to track remote branch dev from origin. Switched to a new branch 'dev' Administrator@USER-20160512VQ MINGW64 ~/desktop/github-note (dev) $ git branch -r origin/HEAD -> origin/master origin/dev origin/master Administrator@USER-20160512VQ MINGW64 ~/desktop/github-note (dev) $ git branch -a * dev master remotes/origin/HEAD -> origin/master remotes/origin/dev remotes/origin/master Administrator@USER-20160512VQ MINGW64 ~/desktop/github-note (dev) $ git branch * dev master ~~~ 可以看出(得出結論): 1. `git branch -r` 查看遠程分支(包括遠程的指向) 2. `git branch -a` 查看所有(本地和遠程)分支(包括遠程的指向和當前工作的本地分支) 3. `git branch` 查看本地分支(包括當前工作的本地分支),當前工作的分支用`*`表示。 4. 默認`clone`后并不沒有`dev`分支,使用`git checkout dev`檢出后才會有dev分支,并且此時`/.git/refs/heads/`目錄下面才會有`dev`文件,在檢出`dev`分支之前、剛克隆時只有`master`文件,請注意到這個細節。 猜想: 1. 原來`clone`遠程倉庫是將`遠程倉庫`克隆到了本地,而我們本地工作時是在`本地倉庫`中工作的,所以需要從`本地的遠程倉庫`中檢出到本地倉庫,默認克隆后會自動將`master`分支檢出。所以這推翻了我們之前理解的本地只是本地分支,只是將它和遠程分支關聯就可以。或許對這個還是比較模糊,先看一下配置文件吧。 ## /.git/config ~~~ [core] repositoryformatversion = 0 filemode = false bare = false logallrefupdates = true symlinks = false ignorecase = true [remote "origin"] url = https://github.com/xiasf/github-note fetch = +refs/heads/*:refs/remotes/origin/* [branch "master"] remote = origin merge = refs/heads/master [branch "dev"] remote = origin merge = refs/heads/dev ~~~ 這段配置表示了`本地分支`和`本地遠程分支`的關系(origin就是`本地遠程分支`的別名,還記得`$ git remote add origin url`命令嗎) ~~~ # 本地分支master [branch "master"] # 對應的遠程分支為origin remote = origin # 對應的本地分支文件為master(master內容為一次commit的哈希Hash值) merge = refs/heads/master [branch "dev"] remote = origin merge = refs/heads/dev ~~~ 這段配置記錄了本地遠程倉庫的信息: ~~~ # 本地遠程倉庫 [remote "origin"] # 對應的遠程倉庫地址 url = https://github.com/xiasf/github-note # 本地倉庫與本地遠程倉庫的對應關系 fetch = +refs/heads/*:refs/remotes/origin/* ~~~ 現在清晰一點吧,記住現在這幾個名詞: 1. **本地倉庫** 2. **本地遠程倉庫** 3. **遠程倉庫** >[info] 不要在搞混了哦,尤其是本地遠程倉庫和遠程倉庫不能搞混淆了,不要簡單的像之前一樣以為本地只是本地分支,只是將它和遠程分支關聯就可以,這種理解是錯誤的。 ### 本地倉庫: 我們在這里工作 ### 本地遠程倉庫 可以看做是我們`本地倉庫`與`遠程倉庫`連接的橋梁 ### 遠程倉庫 它只是一個地址源,用于與外界進行共享倉庫的 >[info] 通常遠程倉庫只是用于向遠程推送本地分支,或者進行一些同步操作,并且本地遠程倉庫實質只是一個“橋梁”的作用,所以一般我們所說的遠程倉庫都是指本地遠程倉庫,或者說我們使用時感覺不到這個區別,根本沒有這個概念,但我們理解真正的原理之后,很多問題就會清晰了。比如git fetch命令,是獲取遠程倉庫新提交到本地遠程倉庫,所以命令執行后還需要進行merge操作。 參考:[遠程分支](http://www.hmoore.net/kancloud/progit/70187)
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