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這篇文章將為大家詳細講解有關(guān)創(chuàng)建Git Submodule測試項目的方法，小編覺得挺實用的，因此分享給大家做個參考，希望大家閱讀完這篇文章后可以有所收獲。
自從看了蔣鑫的《Git權(quán)威指南》之后就開始使用Git Submodule功能，團隊也都熟悉了怎么使用，多個子系統(tǒng)（模塊）都能及時更新到最新的公共資源，把使用的過程以及經(jīng)驗和容易遇到的問題分享給大家。
Git Submodule功能剛剛開始學(xué)習(xí)可能覺得有點怪異，所以本教程把每一步的操作的命令和結(jié)果都用代碼的形式展現(xiàn)給大家，以便更好的理解。
1.對于公共資源各種程序員的處理方式
每個公司的系統(tǒng)都會有一套統(tǒng)一的系統(tǒng)風(fēng)格，或者針對某一個大客戶的多個系統(tǒng)風(fēng)格保持統(tǒng)一，而且如果風(fēng)格改動后要同步到多個系統(tǒng)中；這樣的需求幾乎每個開發(fā)人員都遇到，下面看看各個層次的程序員怎么處理：
假如對于系統(tǒng)的風(fēng)格需要幾個目錄：css、images、js。
引用一段《Git權(quán)威指南》的話： 項目的版本庫在某些情況蝦需要引用其他版本庫中的文件，例如公司積累了一套常用的函數(shù)庫，被多個項目調(diào)用，顯然這個函數(shù)庫的代碼不能直接放到某個項目的代碼中，而是要獨立為一個代碼庫，那么其他項目要調(diào)用公共函數(shù)庫該如何處理呢？分別把公共函數(shù)庫的文件拷貝到各自的項目中會造成冗余，丟棄了公共函數(shù)庫的維護歷史，這顯然不是好的方法。
2.開始學(xué)習(xí)Git Submodule
“工欲善其事，必先利其器”！
既然文藝程序員那么輕松就搞定了，那我們就把過程一一道來。
說明：本例采用兩個項目以及兩個公共類庫演示對submodule的操作。因為在一寫資料或者書上的例子都是一個項目對應(yīng)1～N個lib，但是實際應(yīng)用往往并不是這么簡單。
2.1 創(chuàng)建Git Submodule測試項目
2.1.1 準備環(huán)境
➜ henryyan@hy-hp ~ pwd /home/henryyan mkdir -p submd/repos
創(chuàng)建需要的本地倉庫：
cd ~/submd/repos git --git-dir=lib1.git init --bare git --git-dir=lib2.git init --bare git --git-dir=project1.git init --bare git --git-dir=project2.git init --bare
初始化工作區(qū)：
mkdir ~/submd/ws cd ~/submd/ws
2.1.2 初始化項目
初始化project1：
➜ henryyan@hy-hp ~/submd/ws git clone ../repos/project1.git Cloning into project1... done. warning: You appear to have cloned an empty repository. ➜ henryyan@hy-hp ~/submd/ws cd project1 ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) echo "project1" > project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ ls project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git add project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git status # On branch master # # Initial commit # # Changes to be committed: # (use "git rm --cached <file>..." to unstage) # # new file: project-infos.txt # ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git commit -m "init project1" [master (root-commit) 473a2e2] init project1 1 files changed, 1 insertions(+), 0 deletions(-) create mode 100644 project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) git push origin master Counting objects: 3, done. Writing objects: 100% (3/3), 232 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/ws/../repos/project1.git * [new branch] master -> master </file>
初始化project2：
➜ henryyan@hy-hp ~/submd/ws/project1 cd .. ➜ henryyan@hy-hp ~/submd/ws git clone ../repos/project2.git Cloning into project2... done. warning: You appear to have cloned an empty repository. ➜ henryyan@hy-hp ~/submd/ws cd project2 ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) echo "project2" > project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ ls project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git add project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git status # On branch master # # Initial commit # # Changes to be committed: # (use "git rm --cached <file>..." to unstage) # # new file: project-infos.txt # ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git commit -m "init project2" [master (root-commit) 473a2e2] init project2 1 files changed, 1 insertions(+), 0 deletions(-) create mode 100644 project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) git push origin master Counting objects: 3, done. Writing objects: 100% (3/3), 232 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/ws/../repos/project2.git * [new branch] master -> master </file>
2.1.3 初始化公共類庫
初始化公共類庫lib1：
➜ henryyan@hy-hp ~/submd/ws git clone ../repos/lib1.git Cloning into lib1... done. warning: You appear to have cloned an empty repository. ➜ henryyan@hy-hp ~/submd/ws cd lib1 ➜ henryyan@hy-hp ~/submd/ws/lib1 git:(master) echo "I'm lib1." > lib1-features ➜ henryyan@hy-hp ~/submd/ws/lib1 git:(master) ✗ git add lib1-features ➜ henryyan@hy-hp ~/submd/ws/lib1 git:(master) ✗ git commit -m "init lib1" [master (root-commit) c22aff8] init lib1 1 files changed, 1 insertions(+), 0 deletions(-) create mode 100644 lib1-features ➜ henryyan@hy-hp ~/submd/ws/lib1 git:(master) git push origin master Counting objects: 3, done. Writing objects: 100% (3/3), 227 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/ws/../repos/lib1.git * [new branch] master -> master
初始化公共類庫lib2：
➜ henryyan@hy-hp ~/submd/ws/lib1 git:(master) cd .. ➜ henryyan@hy-hp ~/submd/ws git clone ../repos/lib2.git Cloning into lib2... done. warning: You appear to have cloned an empty repository. ➜ henryyan@hy-hp ~/submd/ws cd lib2 ➜ henryyan@hy-hp ~/submd/ws/lib2 git:(master) echo "I'm lib2." > lib2-features ➜ henryyan@hy-hp ~/submd/ws/lib2 git:(master) ✗ git add lib2-features ➜ henryyan@hy-hp ~/submd/ws/lib2 git:(master) ✗ git commit -m "init lib2" [master (root-commit) c22aff8] init lib2 1 files changed, 1 insertions(+), 0 deletions(-) create mode 100644 lib2-features ➜ henryyan@hy-hp ~/submd/ws/lib2 git:(master) git push origin master Counting objects: 3, done. Writing objects: 100% (3/3), 227 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/ws/../repos/lib2.git * [new branch] master -> master
2.2 為主項目添加Submodules
2.2.1 為project1添加lib1和lib2
➜ henryyan@hy-hp ~/submd/ws/lib2 git:(master) cd ../project1 ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ls project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) git submodule add ~/submd/repos/lib1.git libs/lib1 Cloning into libs/lib1... done. ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git submodule add ~/submd/repos/lib2.git libs/lib2 Cloning into libs/lib2... done. ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ ls libs project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ ls libs lib1 lib2 ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git status # On branch master # Changes to be committed: # (use "git reset HEAD <file>..." to unstage) # # new file: .gitmodules # new file: libs/lib1 # new file: libs/lib2 # # 查看一下公共類庫的內(nèi)容 ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) cat libs/lib1/lib1-features I'm lib1. ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) cat libs/lib2/lib2-features I'm lib2. </file>
好了，到目前為止我們已經(jīng)使用git submodule add命令為project1成功添加了兩個公共類庫（lib1、lib2），查看了當(dāng)前的狀態(tài)發(fā)現(xiàn)添加了一個新文件(.gitmodules)和兩個文件夾(libs/lib1、libs/lib2)；那么新增的.gitmodules文件是做什么用的呢？我們查看一下文件內(nèi)容便知曉了：
n@hy-hp ~/submd/ws/project1 git:(master) ✗ cat .gitmodules [submodule "libs/lib1"] path = libs/lib1 url = /home/henryyan/submd/repos/lib1.git [submodule "libs/lib2"] path = libs/lib2 url = /home/henryyan/submd/repos/lib2.git
原來如此，.gitmodules記錄了每個submodule的引用信息，知道在當(dāng)前項目的位置以及倉庫的所在。
好的，我們現(xiàn)在把更改提交到倉庫。
➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git commit -a -m "add submodules[lib1,lib2] to project1" [master 7157977] add submodules[lib1,lib2] to project1 3 files changed, 8 insertions(+), 0 deletions(-) create mode 100644 .gitmodules create mode 160000 libs/lib1 create mode 160000 libs/lib2 ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) git push Counting objects: 5, done. Delta compression using up to 2 threads. Compressing objects: 100% (4/4), done. Writing objects: 100% (4/4), 491 bytes, done. Total 4 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (4/4), done. To /home/henryyan/submd/ws/../repos/project1.git 45cbbcb..7157977 master -> master
假如你是第一次引入公共類庫的開發(fā)人員，那么項目組的其他成員怎么Clone帶有Submodule的項目呢，下面我們再clone一個項目講解如何操作。
2.3 Clone帶有Submodule的倉庫
模擬開發(fā)人員B……
➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) cd ~/submd/ws ➜ henryyan@hy-hp ~/submd/ws git clone ../repos/project1.git project1-b Cloning into project1-b... done. ➜ henryyan@hy-hp ~/submd/ws cd project1-b ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) git submodule -c22aff85be91eca442734dcb07115ffe526b13a1 libs/lib1 -7290dce0062bd77df1d83b27dd3fa3f25a836b54 libs/lib2
看到submodules的狀態(tài)是hash碼和文件目錄，但是注意前面有一個減號：-，含義是該子模塊還沒有檢出。
OK，檢出project1-b的submodules……
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) git submodule init Submodule 'libs/lib1' (/home/henryyan/submd/repos/lib1.git) registered for path 'libs/lib1' Submodule 'libs/lib2' (/home/henryyan/submd/repos/lib2.git) registered for path 'libs/lib2' ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) git submodule update Cloning into libs/lib1... done. Submodule path 'libs/lib1': checked out 'c22aff85be91eca442734dcb07115ffe526b13a1' Cloning into libs/lib2... done. Submodule path 'libs/lib2': checked out '7290dce0062bd77df1d83b27dd3fa3f25a836b54'
讀者可以查看：.git/config文件的內(nèi)容，最下面有submodule的注冊信息！
驗證一下類庫的文件是否存在：
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) cat libs/lib1/lib1-features libs/lib2/lib2-features I'm lib1. I'm lib2.
上面的兩個命令(git submodule init & update)其實可以簡化，后面會講到！
2.3 修改Submodule
我們在開發(fā)人員B的項目上修改Submodule的內(nèi)容。
先看一下當(dāng)前Submodule的狀態(tài)：
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) cd libs/lib1 ➜ henryyan@hy-hp ~/submd/ws/project1-b/libs/lib1 git status # Not currently on any branch. nothing to commit (working directory clean)
為什么是Not currently on any branch呢？不是應(yīng)該默認在master分支嗎？別急，一一解答！
Git對于Submodule有特殊的處理方式，在一個主項目中引入了Submodule其實Git做了3件事情：
在project1中push之后其實就是更新了引用的commit id，然后project1-b在clone的時候獲取到了submodule的commit id，然后當(dāng)執(zhí)行g(shù)it submodule update的時候git就根據(jù)gitlink獲取submodule的commit id，最后獲取submodule的文件，所以clone之后不在任何分支上；但是master分支的commit id和HEAD保持一致。
查看~/submd/ws/project1-b/libs/lib1的引用信息：
➜ henryyan@hy-hp ~/submd/ws/project1-b/libs/lib1 cat .git/HEAD c22aff85be91eca442734dcb07115ffe526b13a1 ➜ henryyan@hy-hp ~/submd/ws/project1-b/libs/lib1 cat .git/refs/heads/master c22aff85be91eca442734dcb07115ffe526b13a1
現(xiàn)在我們要修改lib1的文件需要先切換到master分支：
➜ henryyan@hy-hp ~/submd/ws/project1-b/libs/lib1 git checkout master Switched to branch 'master' ➜ henryyan@hy-hp ~/submd/ws/project1-b/libs/lib1 git:(master) echo "add by developer B" >> lib1-features ➜ henryyan@hy-hp ~/submd/ws/project1-b/libs/lib1 git:(master) ✗ git commit -a -m "update lib1-features by developer B" [master 36ad12d] update lib1-features by developer B 1 files changed, 1 insertions(+), 0 deletions(-)
在主項目中修改Submodule提交到倉庫稍微繁瑣一點，在git push之前我們先看看project1-b狀態(tài)：
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git status # On branch master # 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: libs/lib1 (new commits) # no changes added to commit (use "git add" and/or "git commit -a") </file></file>
libs/lib1 (new commits)狀態(tài)表示libs/lib1有新的提交，這個比較特殊，看看project1-b的狀態(tài)：
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git diff diff --git a/libs/lib1 b/libs/lib1 index c22aff8..36ad12d 160000 --- a/libs/lib1 +++ b/libs/lib1 @@ -1 +1 @@ -Subproject commit c22aff85be91eca442734dcb07115ffe526b13a1 +Subproject commit 36ad12d40d8a41a4a88a64add27bd57cf56c9de2
從狀態(tài)中可以看出libs/lib1的commit id由原來的c22aff85be91eca442734dcb07115ffe526b13a1更改為36ad12d40d8a41a4a88a64add27bd57cf56c9de2
注意：如果現(xiàn)在執(zhí)行了git submodule update操作那么libs/lib1的commit id又會還原到c22aff85be91eca442734dcb07115ffe526b13a1，
這樣的話剛剛的修改是不是就丟死了呢？不會，因為修改已經(jīng)提交到了master分支，只要再git checkout master就可以了。
現(xiàn)在可以把libs/lib1的修改提交到倉庫了：
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ cd libs/lib1 ➜ henryyan@hy-hp ~/submd/ws/project1-b/libs/lib1 git:(master) git push Counting objects: 5, done. Writing objects: 100% (3/3), 300 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/repos/lib1.git c22aff8..36ad12d master -> master
現(xiàn)在僅僅只完成了一步，下一步要提交project1-b引用submodule的commit id：
➜ henryyan@hy-hp ~/submd/ws/project1-b/libs/lib1 git:(master) cd ~/submd/ws/project1-b ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git add -u ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git commit -m "update libs/lib1 to lastest commit id" [master c96838a] update libs/lib1 to lastest commit id 1 files changed, 1 insertions(+), 1 deletions(-) ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) git push Counting objects: 5, done. Delta compression using up to 2 threads. Compressing objects: 100% (3/3), done. Writing objects: 100% (3/3), 395 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/ws/../repos/project1.git 7157977..c96838a master -> master
OK，大功高成，我們完成了Submodule的修改并把libs/lib1的最新commit id提交到了倉庫。
接下來要看看project1怎么獲取submodule了。
2.4 更新主項目的Submodules
好的，讓我們先進入project1目錄同步倉庫：
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) cd ../project1 ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) git pull remote: Counting objects: 5, done. remote: Compressing objects: 100% (3/3), done. remote: Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. From /home/henryyan/submd/ws/../repos/project1 7157977..c96838a master -> origin/master Updating 7157977..c96838a Fast-forward libs/lib1 | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git status # On branch master # 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: libs/lib1 (new commits) # no changes added to commit (use "git add" and/or "git commit -a") </file></file>
我們運行了git pull命令和git status獲取了最新的倉庫源碼，然后看到了狀態(tài)時modified，這是為什么呢？
我們用git diff比較一下不同：
➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git diff diff --git a/libs/lib1 b/libs/lib1 index 36ad12d..c22aff8 160000 --- a/libs/lib1 +++ b/libs/lib1 @@ -1 +1 @@ -Subproject commit 36ad12d40d8a41a4a88a64add27bd57cf56c9de2 +Subproject commit c22aff85be91eca442734dcb07115ffe526b13a1 從diff的結(jié)果分析出來時因為submodule的commit id更改了，我們前面剛剛講了要在主項目更新submodule的內(nèi)容首先要提交submdoule的內(nèi)容，然后再更新主項目中引用的submodulecommit id；現(xiàn)在我們看到的不同就是因為剛剛更改了project1-b的submodule commit id；好的，我來學(xué)習(xí)一下怎么更新project1的公共類庫。 follow me…… ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git submodule update ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git status # On branch master # 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: libs/lib1 (new commits) # no changes added to commit (use "git add" and/or "git commit -a") </file></file>
泥馬，為什么沒有更新？git submodule update命令不是更新子模塊倉庫的嗎？
別急，先聽我解釋；因為子模塊是在project1中引入的，git submodule add ~/submd/repos/lib1.git libs/lib1命令的結(jié)果，操作之后git只是把lib1的內(nèi)容clone到了project1中，但是沒有在倉庫注冊，證據(jù)如下：
➜ henryyan@hy-hp ~/submd2/ws/project1 git:(master) ✗ cat .git/config [core] repositoryformatversion = 0 filemode = true bare = false logallrefupdates = true [remote "origin"] fetch = +refs/heads/*:refs/remotes/origin/* url = /home/henryyan/submd/ws/../repos/project1.git [branch "master"] remote = origin merge = refs/heads/master
我們說過git submodule init就是在.git/config中注冊子模塊的信息，下面我們試試注冊之后再更新子模塊：
➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git submodule init Submodule 'libs/lib1' (/home/henryyan/submd/repos/lib1.git) registered for path 'libs/lib1' Submodule 'libs/lib2' (/home/henryyan/submd/repos/lib2.git) registered for path 'libs/lib2' ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git submodule update remote: Counting objects: 5, done. remote: Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. From /home/henryyan/submd/repos/lib1 c22aff8..36ad12d master -> origin/master Submodule path 'libs/lib1': checked out '36ad12d40d8a41a4a88a64add27bd57cf56c9de2' ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) cat .git/config [core] repositoryformatversion = 0 filemode = true bare = false logallrefupdates = true [remote "origin"] fetch = +refs/heads/*:refs/remotes/origin/* url = /home/henryyan/submd/ws/../repos/project1.git [branch "master"] remote = origin merge = refs/heads/master [submodule "libs/lib1"] url = /home/henryyan/submd/repos/lib1.git [submodule "libs/lib2"] url = /home/henryyan/submd/repos/lib2.git ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) cat libs/lib1/lib1-features I'm lib1. add by developer B
上面的結(jié)果足以證明剛剛的推斷，所以記得當(dāng)需要更新子模塊的內(nèi)容時請先確保已經(jīng)運行過git submodule init。
2.5 為project2添加lib1和lib2
這個操作對于讀到這里的你來說應(yīng)該是輕車熟路了，action：
➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) cd ~/submd/ws/project2 ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) git submodule add ~/submd/repos/lib1.git libs/lib1 Cloning into libs/lib1... done. ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git submodule add ~/submd/repos/lib2.git libs/lib2 zsh: correct 'libs/lib2' to 'libs/lib1' [nyae]? n Cloning into libs/lib2... done. ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ ls libs project-infos.txt ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git submodule init Submodule 'libs/lib1' (/home/henryyan/submd/repos/lib1.git) registered for path 'libs/lib1' Submodule 'libs/lib2' (/home/henryyan/submd/repos/lib2.git) registered for path 'libs/lib2' ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git status # On branch master # Changes to be committed: # (use "git reset HEAD <file>..." to unstage) # # new file: .gitmodules # new file: libs/lib1 # new file: libs/lib2 # ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git commit -a -m "add lib1 and lib2" [master 8dc697f] add lib1 and lib2 3 files changed, 8 insertions(+), 0 deletions(-) create mode 100644 .gitmodules create mode 160000 libs/lib1 create mode 160000 libs/lib2 ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) git push Counting objects: 5, done. Delta compression using up to 2 threads. Compressing objects: 100% (4/4), done. Writing objects: 100% (4/4), 471 bytes, done. Total 4 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (4/4), done. To /home/henryyan/submd/ws/../repos/project2.git 6e15c68..8dc697f master -> master </file>
我們依次執(zhí)行了添加submodule并commit和push到倉庫，此階段任務(wù)完成。
2.6 修改lib1和lib2并同步到project1和project2
假如開發(fā)人員C同時負責(zé)project1和project2，有可能在修改project1的某個功能的時候發(fā)現(xiàn)lib1或者lib2的某個組件有bug需要修復(fù)，這個需求多模塊和大型系統(tǒng)中經(jīng)常遇到，我們應(yīng)該怎么解決呢？
假如我的需求如下：
在lib1中添加一個文件：README，用來描述lib1的功能
在lib2中的lib2-features文件中添加一寫文字：學(xué)習(xí)Git submodule的修改并同步功能
2.6.1 在lib1中添加一個文件：README
➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) cd libs/lib1 ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib1 git:(master) echo "lib1 readme contents" > README ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib1 git:(master) ✗ git add README ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib1 git:(master) ✗ git commit -m "add file README" [master 8c666d8] add file README 1 files changed, 1 insertions(+), 0 deletions(-) create mode 100644 README ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib1 git:(master) git push Counting objects: 4, done. Delta compression using up to 2 threads. Compressing objects: 100% (2/2), done. Writing objects: 100% (3/3), 310 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/repos/lib1.git 36ad12d..8c666d8 master -> master
前面提到過現(xiàn)在僅僅只完成了一部分，我們需要在project2中再更新lib1的commit id：
➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git status # On branch master # 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: libs/lib1 (new commits) # no changes added to commit (use "git add" and/or "git commit -a") ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git add libs/lib1 ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git commit -m "update lib1 to lastest commit id" [master ce1f3ba] update lib1 to lastest commit id 1 files changed, 1 insertions(+), 1 deletions(-) </file></file>
我們暫時不push到倉庫，等待和lib2的修改一起push。
2.6.2 在lib2中的lib2-features文件添加文字
➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) cd libs/lib2 ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib2 git:(master) echo "學(xué)習(xí)Git submodule的修改并同步功能" >> lib2-features ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib2 git:(master) ✗ git add lib2-features ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib2 git:(master) ✗ git commit -m "添加文字：學(xué)習(xí)Git submodule的修改并同步功能" [master e372b21] 添加文字：學(xué)習(xí)Git submodule的修改并同步功能 1 files changed, 1 insertions(+), 0 deletions(-) ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib2 git:(master) git push Counting objects: 5, done. Delta compression using up to 2 threads. Compressing objects: 100% (2/2), done. Writing objects: 100% (3/3), 376 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/repos/lib2.git 7290dce..e372b21 master -> master ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib2 git:(master) echo "學(xué)習(xí)Git submodule的修改并同步功能" >> lib2-features ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib2 git:(master) ✗ git add lib2-features ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib2 git:(master) ✗ git commit -m "添加文字：學(xué)習(xí)Git submodule的修改并同步功能" [master e372b21] 添加文字：學(xué)習(xí)Git submodule的修改并同步功能 1 files changed, 1 insertions(+), 0 deletions(-) ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib2 git:(master) git push Counting objects: 5, done. Delta compression using up to 2 threads. Compressing objects: 100% (2/2), done. Writing objects: 100% (3/3), 376 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/repos/lib2.git 7290dce..e372b21 master -> master ➜ henryyan@hy-hp ~/submd/ws/project2/libs/lib2 git:(master) cd - ~/submd/ws/project2 ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git status # On branch master # Your branch is ahead of 'origin/master' by 1 commit. # # 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: libs/lib2 (new commits) # no changes added to commit (use "git add" and/or "git commit -a") ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git add libs/lib2 ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) ✗ git commit -m "update lib2 to lastest commit id" [master df344c5] update lib2 to lastest commit id 1 files changed, 1 insertions(+), 1 deletions(-) ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) git status # On branch master # Your branch is ahead of 'origin/master' by 2 commits. # nothing to commit (working directory clean) ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) git push Counting objects: 8, done. Delta compression using up to 2 threads. Compressing objects: 100% (6/6), done. Writing objects: 100% (6/6), 776 bytes, done. Total 6 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (6/6), done. To /home/henryyan/submd/ws/../repos/project2.git 8dc697f..df344c5 master -> master </file></file>
2.7 同步project2的lib1和lib2的修改到project1
現(xiàn)在project2已經(jīng)享受到了最新的代碼帶來的快樂，那么既然project1和project2屬于同一個風(fēng)格，或者調(diào)用同一個功能，要讓這兩個(可能幾十個)項目保持一致。
➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) cd ../project1 ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) git pull Already up-to-date.
看看上面的結(jié)果對嗎？為什么lib1和lib2更新了但是沒有顯示new commits呢？說到這里我記得剛剛開始學(xué)習(xí)的時候真得要暈死了，Git跟我玩捉迷藏游戲，為什么我明明提交了但是從project1更新不到任何改動呢？
幫大家分析一下問題，不過在分析之前先看看當(dāng)前(project1和project2)的submodule狀態(tài)：
# project2 的狀態(tài)，也就是我們剛剛修改后的狀態(tài) ➜ henryyan@hy-hp ~/submd/ws/project2 git:(master) git submodule 8c666d86531513dd1aebdf235f142adbac72c035 libs/lib1 (heads/master) e372b21dffa611802c282278ec916b5418acebc2 libs/lib2 (heads/master) # project1 的狀態(tài)，等待更新submodules ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) git submodule 36ad12d40d8a41a4a88a64add27bd57cf56c9de2 libs/lib1 (remotes/origin/HEAD) 7290dce0062bd77df1d83b27dd3fa3f25a836b54 libs/lib2 (heads/master)
兩個項目有兩個區(qū)別：
2.7.1 更新project1的lib1和lib2改動
我們還記得剛剛在project2中修改的時候把lib1和lib2都切換到了master分支，目前project1中的lib1不在任何分支，我們先切換到master分支：
➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) cd libs/lib1 ➜ henryyan@hy-hp ~/submd/ws/project1/libs/lib1 git checkout master Previous HEAD position was 36ad12d... update lib1-features by developer B Switched to branch 'master' Your branch is behind 'origin/master' by 1 commit, and can be fast-forwarded. ➜ henryyan@hy-hp ~/submd/ws/project1/libs/lib1 git:(master) git pull remote: Counting objects: 4, done. remote: Compressing objects: 100% (2/2), done. remote: Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. From /home/henryyan/submd/repos/lib1 36ad12d..8c666d8 master -> origin/master Updating c22aff8..8c666d8 Fast-forward README | 1 + lib1-features | 1 + 2 files changed, 2 insertions(+), 0 deletions(-) create mode 100644 README ➜ henryyan@hy-hp ~/submd/ws/project1/libs/lib1 git:(master)
果不其然，我們看到了剛剛在project2中修改的內(nèi)容，同步到了project1中，當(dāng)然現(xiàn)在更新了project1的lib1，commit id也會隨之變動：
➜ henryyan@hy-hp ~/submd/ws/project1/libs/lib1 git:(master) cd ../../ ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git status # On branch master # 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: libs/lib1 (new commits) # no changes added to commit (use "git add" and/or "git commit -a") ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git diff diff --git a/libs/lib1 b/libs/lib1 index 36ad12d..8c666d8 160000 --- a/libs/lib1 +++ b/libs/lib1 @@ -1 +1 @@ -Subproject commit 36ad12d40d8a41a4a88a64add27bd57cf56c9de2 +Subproject commit 8c666d86531513dd1aebdf235f142adbac72c035 </file></file>
現(xiàn)在最新的commit id和project2目前的狀態(tài)一致，說明真的同步了；好的，現(xiàn)在可以使用相同的辦法更新lib2了：
➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ cd libs/lib2 ➜ henryyan@hy-hp ~/submd/ws/project1/libs/lib2 git:(master) git pull remote: Counting objects: 5, done. remote: Compressing objects: 100% (2/2), done. remote: Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. From /home/henryyan/submd/repos/lib2 7290dce..e372b21 master -> origin/master Updating 7290dce..e372b21 Fast-forward lib2-features | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
2.7.2 更新project1的submodule引用
在2.7.1中我們更新了project1的lib1和lib2的最新版本，現(xiàn)在要把最新的commit id保存到project1中以保持最新的引用。
➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git status # On branch master # 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: libs/lib1 (new commits) # modified: libs/lib2 (new commits) # no changes added to commit (use "git add" and/or "git commit -a") ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) ✗ git commit -a -m "update lib1 and lib2 commit id to new version" [master 8fcca50] update lib1 and lib2 commit id to new version 2 files changed, 2 insertions(+), 2 deletions(-) ➜ henryyan@hy-hp ~/submd/ws/project1 git:(master) git push Counting objects: 5, done. Delta compression using up to 2 threads. Compressing objects: 100% (3/3), done. Writing objects: 100% (3/3), 397 bytes, done. Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. To /home/henryyan/submd/ws/../repos/project1.git c96838a..8fcca50 master -> master </file></file>
2.8 更新project1-b項目的子模塊(使用腳本)
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) git pull remote: Counting objects: 5, done. remote: Compressing objects: 100% (3/3), done. remote: Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. From /home/henryyan/submd/ws/../repos/project1 c96838a..8fcca50 master -> origin/master Updating c96838a..8fcca50 Fast-forward libs/lib1 | 2 +- libs/lib2 | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git status # On branch master # 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: libs/lib1 (new commits) # modified: libs/lib2 (new commits) # no changes added to commit (use "git add" and/or "git commit -a") </file></file>
Git提示lib1和lib2有更新內(nèi)容，這個判斷的依據(jù)來源于submodule commit id的引用。
現(xiàn)在怎么更新呢？難道還是像project1中那樣進入子模塊的目錄然后git checkout master，接著git pull？
而且現(xiàn)在僅僅才兩個子模塊、兩個項目，如果在真實的項目中使用的話可能幾個到幾十個不等，再加上N個submodule，自己算一下要怎么更新多少個submodules？
例如筆者現(xiàn)在做的一個項目有5個web模塊，每個web模塊引用公共的css、js、images、jsp資源，這樣就有20個submodule需要更新?。?！
工欲善其事，必先利其器，寫一個腳本代替手動任務(wù)。
2.8.1 牛刀小試
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ grep path .gitmodules | awk '{ print $3 }' > /tmp/study-git-submodule-dirs
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ cat /tmp/study-git-submodule-dirs
libs/lib1
libs/lib2我們通過分析.gitmodules文件得出子模塊的路徑，然后就可以根據(jù)這些路徑進行更新。
2.8.2 上路
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ mkdir bin ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ vi bin/update-submodules.sh
把下面的腳本復(fù)制到bin/update-submodules.sh中：
#!/bin/bash
grep path .gitmodules | awk '{ print $3 }' > /tmp/study-git-submodule-dirs
# read
while read LINE
do
echo $LINE
(cd ./$LINE && git checkout master && git pull)
done < /tmp/study-git-submodule-dirs稍微解釋一下上面的腳本執(zhí)行過程：
2.8.3 2013-01-19更新
網(wǎng)友@紫煌給出了更好的辦法，一個命令就可以代替上面的bin/update-submodules.sh的功能：
git submodule foreach git pull
此命令也腳本一樣，循環(huán)進入（enter）每個子模塊的目錄，然后執(zhí)行foreach后面的命令。
該后面的命令可以任意的，例如 git submodule foreach ls -l 可以列出每個子模塊的文件列表
2.8.3 體驗工具帶來的便利
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git submodule +36ad12d40d8a41a4a88a64add27bd57cf56c9de2 libs/lib1 (heads/master) +7290dce0062bd77df1d83b27dd3fa3f25a836b54 libs/lib2 (heads/master) # 添加執(zhí)行權(quán)限 ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ chmod +x ./bin/update-submodules.sh ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ ./bin/update-submodules.sh libs/lib1 Already on 'master' remote: Counting objects: 4, done. remote: Compressing objects: 100% (2/2), done. remote: Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. From /home/henryyan/submd/repos/lib1 36ad12d..8c666d8 master -> origin/master Updating 36ad12d..8c666d8 Fast-forward README | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) create mode 100644 README libs/lib2 Switched to branch 'master' remote: Counting objects: 5, done. remote: Compressing objects: 100% (2/2), done. remote: Total 3 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (3/3), done. From /home/henryyan/submd/repos/lib2 7290dce..e372b21 master -> origin/master Updating 7290dce..e372b21 Fast-forward lib2-features | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git submodule 8c666d86531513dd1aebdf235f142adbac72c035 libs/lib1 (heads/master) e372b21dffa611802c282278ec916b5418acebc2 libs/lib2 (heads/master) ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git status # On branch master # Untracked files: # (use "git add <file>..." to include in what will be committed) # # bin/ nothing added to commit but untracked files present (use "git add" to track) </file>
更新之后的兩個變化：
現(xiàn)在可以把工具添加到倉庫了，當(dāng)然你可以很驕傲的分享給其他項目組的同事。
➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git add bin/update-submodules.sh ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) ✗ git commit -m "添加自動更新submodule的快捷腳本^_^" [master 756e788] 添加自動更新submodule的快捷腳本^_^ 1 files changed, 9 insertions(+), 0 deletions(-) create mode 100755 bin/update-submodules.sh ➜ henryyan@hy-hp ~/submd/ws/project1-b git:(master) git push Counting objects: 5, done. Delta compression using up to 2 threads. Compressing objects: 100% (3/3), done. Writing objects: 100% (4/4), 625 bytes, done. Total 4 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (4/4), done. To /home/henryyan/submd/ws/../repos/project1.git 8fcca50..756e788 master -> master
2.9 新進員工加入團隊，一次性Clone項目和Submodules
一般人使用的時候都是使用如下命令：
git clone /path/to/repos/foo.git git submodule init git submodule update
新員工不耐煩了，嘴上不說但是心里想：怎么那么麻煩？
上面的命令簡直弱暴了，直接一行命令搞定：
git clone --recursive /path/to/repos/foo.git
–recursive參數(shù)的含義：可以在clone項目時同時clone關(guān)聯(lián)的submodules。
git help 對其解釋：
--recursive, --recurse-submodules
After the clone is created, initialize all submodules within, using their default settings. This is equivalent to running git
submodule update --init --recursive immediately after the clone is finished. This option is ignored if the cloned repository
does not have a worktree/checkout (i.e. if any of --no-checkout/-n, --bare, or --mirror is given)
2.9.1 使用一鍵方式克隆project2
➜ henryyan@hy-hp ~/submd/ws git clone --recursive ../repos/project2.git project2-auto-clone-submodules Cloning into project2-auto-clone-submodules... done. Submodule 'libs/lib1' (/home/henryyan/submd/repos/lib1.git) registered for path 'libs/lib1' Submodule 'libs/lib2' (/home/henryyan/submd/repos/lib2.git) registered for path 'libs/lib2' Cloning into libs/lib1... done. Submodule path 'libs/lib1': checked out '8c666d86531513dd1aebdf235f142adbac72c035' Cloning into libs/lib2... done. Submodule path 'libs/lib2': checked out 'e372b21dffa611802c282278ec916b5418acebc2' 舒服……
3.移除Submodule
牢騷：搞不明白為什么git不設(shè)計一個類似：git submodule remove的命令呢？
我們從project1.git克隆一個項目用來練習(xí)移除submodule：
➜ henryyan@hy-hp ~/submd/ws git clone --recursive ../repos/project1.git project1-remove-submodules Cloning into project1-remove-submodules... done. Submodule 'libs/lib1' (/home/henryyan/submd/repos/lib1.git) registered for path 'libs/lib1' Submodule 'libs/lib2' (/home/henryyan/submd/repos/lib2.git) registered for path 'libs/lib2' Cloning into libs/lib1... done. Submodule path 'libs/lib1': checked out '8c666d86531513dd1aebdf235f142adbac72c035' Cloning into libs/lib2... done. Submodule path 'libs/lib2': checked out 'e372b21dffa611802c282278ec916b5418acebc2' ➜ henryyan@hy-hp ~/submd/ws cd !$ ➜ henryyan@hy-hp ~/submd/ws cd project1-remove-submodules
3.1 Step by
1、刪除git cache和物理文件夾
➜ henryyan@hy-hp ~/submd/ws/project1-remove-submodules git:(master) git rm -r --cached libs/ rm 'libs/lib1' rm 'libs/lib2' ➜ henryyan@hy-hp ~/submd/ws/project1-remove-submodules git:(master) ✗ rm -rf libs
2、刪除.gitmodules的內(nèi)容（或者整個文件） 因為本例只有兩個子模塊，直接刪除文件：
➜ henryyan@hy-hp ~/submd/ws/project1-remove-submodules git:(master) ✗ rm .gitmodules
如果僅僅刪除某一個submodule那么打開.gitmodules文件編輯，刪除對應(yīng)submodule配置即可。
3、刪除.git/config的submodule配置 源文件：
[core] repositoryformatversion = 0 filemode = true bare = false logallrefupdates = true [remote "origin"] fetch = +refs/heads/*:refs/remotes/origin/* url = /home/henryyan/submd/ws/../repos/project1.git [branch "master"] remote = origin merge = refs/heads/master [submodule "libs/lib1"] url = /home/henryyan/submd/repos/lib1.git [submodule "libs/lib2"] url = /home/henryyan/submd/repos/lib2.git
刪除后：
[core] repositoryformatversion = 0 filemode = true bare = false logallrefupdates = true [remote "origin"] fetch = +refs/heads/*:refs/remotes/origin/* url = /home/henryyan/submd/ws/../repos/project1.git [branch "master"] remote = origin merge = refs/heads/master
4、提交更改
➜ henryyan@hy-hp ~/submd/ws/project1-remove-submodules git:(master) ✗ git status # On branch master # Changes to be committed: # (use "git reset HEAD <file>..." to unstage) # # deleted: libs/lib1 # deleted: libs/lib2 # # 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: .gitmodules # ➜ henryyan@hy-hp ~/submd/ws/project1-remove-submodules git:(master) ✗ git add .gitmodules ➜ henryyan@hy-hp ~/submd/ws/project1-remove-submodules git:(master) ✗ git commit -m "刪除子模塊lib1和lib2" [master 5e2ee71] 刪除子模塊lib1和lib2 3 files changed, 0 insertions(+), 8 deletions(-) delete mode 100644 .gitmodules delete mode 160000 libs/lib1 delete mode 160000 libs/lib2 ➜ henryyan@hy-hp ~/submd/ws/project1-remove-submodules git:(master) git push Counting objects: 3, done. Delta compression using up to 2 threads. Compressing objects: 100% (2/2), done. Writing objects: 100% (2/2), 302 bytes, done. Total 2 (delta 0), reused 0 (delta 0) Unpacking objects: 100% (2/2), done. To /home/henryyan/submd/ws/../repos/project1.git 756e788..5e2ee71 master -> master </file></file></file>
對于Git Submodule來說在剛剛接觸的時候多少會有點凌亂的趕緊，尤其是沒有接觸過svn:externals。
學(xué)會了Git submdoule你的項目中再也不會出現(xiàn)大量重復(fù)的資源文件、公共類庫，更不會出現(xiàn)多個版本，甚至一個客戶的多個項目風(fēng)格存在各種差異。
拉取所有子模塊
git submodule foreach git pull git submodule foreach --recursive git submodule init git submodule foreach --recursive git submodule update
關(guān)于創(chuàng)建Git Submodule測試項目的方法就分享到這里了，希望以上內(nèi)容可以對大家有一定的幫助，可以學(xué)到更多知識。如果覺得文章不錯，可以把它分享出去讓更多的人看到。
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