blocks|key|457736|text|我用另一种方式让它正常工作。从一个空的repo开始，在名为"projectfolder/common_code“的新文件夹中添加子模块。之后，就可以在projectfolder中添加项目代码了。详细信息如下所示。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|457737|在空的repo类型中：|457738|git+submodule+add+url_to_repo+projectfolder/common_code|code-block|syntax|javascript|457739|这将创建所需的文件夹结构：|457740|repo
%7C--+projectfolder
++++%7C--+common_code|457741|现在可以添加更多的子模块，并且可以将项目代码添加到projectfolder。|457742|我还不能说为什么它是这样工作的，而不是另一个。|457743|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

I got it working by doing it the other way around. Starting with an empty repo, adding the submodule in a new folder called "projectfolder/common_code". After that it was possible to add the project code in projectfolder. The details are shown below.

In an empty repo type:

<pre><code>git submodule add url_to_repo projectfolder/common_code
</code></pre>

That will create the desired folder structure:

<pre><code>repo
|-- projectfolder
 |-- common_code
</code></pre>

It is now possible to add more submodules, and the project code can be added to projectfolder.

I can't yet say why it worked this way around and not the other.

blocks|key|240805|text|只是为了用人类的语言来澄清错误试图告诉你的是什么：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|240806|您不能在此文件夹中创建已在主存储库中跟踪的存储库。|240807|例如:您有一个名为AwesomeTheme的主题文件夹，它是一个专用存储库，您尝试将其直接转储到您的主存储库(如git+submodule+add+sites/themes+)中，您会得到此"AwesomeTheme"+index+already+exists。|offset|length|style|CODE|240808|您只需要确保在主存储库的版本跟踪中没有sites/themes/AwesomeTheme，这样就可以在那里创建子模块。|240809|所以要解决这个问题，在你的主存储库中，如果你有一个空的sites/theme/AwesomeTheme目录，那么就删除它。如果您已经提交了主存储库中的sites/theme/AwesomeTheme目录，则需要使用如下命令清除它的所有历史记录：|240810|git+filter-branch+--index-filter+\
++++++++++++++'git+rm+-r+--cached+--ignore-unmatch+sites/theme/AwesomeTheme'+++++HEAD|code-block|syntax|javascript|240811|现在可以运行git+submodule+add+git@AwesomeTheme.repowhateverurlthing+sites/themes/AwesomeTheme了|240812|由于主存储库以前从未在sites/themes/AwesomeTheme中看到过任何内容(也称为索引)，因此它现在可以创建它。|240813|entityMap^0|0|0|9|C|1K|U|2N|Z|0|J|P|0|R|O|23|O|0|0|6|29|0|B|P|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@$F|11|G|12|H|I]|$F|13|G|14|H|I]|$F|15|G|16|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|17|8|@$F|18|G|19|H|I]]|9|@]|A|$]]|$1|L|3|M|5|6|7|1A|8|@$F|1B|G|1C|H|I]|$F|1D|G|1E|H|I]]|9|@]|A|$]]|$1|N|3|O|5|P|7|1F|8|@]|9|@]|A|$Q|R]]|$1|S|3|T|5|6|7|1G|8|@$F|1H|G|1I|H|I]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1J|8|@$F|1K|G|1L|H|I]]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|X|$]]

Just to clarify in human language what the error is trying to tell you:

You cannot create a repository in this folder which already tracked in the main repository.

For example: You have a theme folder called <code>AwesomeTheme</code> that's a dedicated repository, you try do dump it directly into your main repository like <code>git submodule add sites/themes</code> and you get this <code>"AwesomeTheme" index already exists</code>.

You just need to make sure there isn't already a <code>sites/themes/AwesomeTheme</code> in the main repository's version tracking so the submodule can be created there.

So to fix, in your main repository if you have an empty <code>sites/theme/AwesomeTheme</code> directory then remove it. If you have already made commits with the <code>sites/theme/AwesomeTheme</code> directory in your main repository you need to purge all history of it with a command like this:

<pre><code>git filter-branch --index-filter \
 'git rm -r --cached --ignore-unmatch sites/theme/AwesomeTheme' HEAD
</code></pre>

Now you can run <code>git submodule add git@AwesomeTheme.repowhateverurlthing sites/themes/AwesomeTheme</code>

Since the main repository has never seen anything (a.k.a index'd) in <code>sites/themes/AwesomeTheme</code> before, it can now create it.

blocks|key|457757|text|我不知道这是否有用，尽管我在尝试从IntelliJ+15中提交文件时遇到了同样的问题。最后，我打开了SourceTree，在那里我可以简单地提交文件。问题解决了。不需要发出任何花哨的git命令。只是提一下，以防任何人有同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|457758|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Don't know if this is any useful, though I had the same problem when trying to commit my files from within IntelliJ 15. In the end, I opened SourceTree and in there I could simply commit the file. Problem solved. No need to issue any fancy git commands. Just mentioning it in case anyone has the same issue.

blocks|key|457784|text|在git目录中，假设您已经同步了所有更改。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|457785|rm+-rf+.git+

rm+-rf+.gitmodules|code-block|syntax|javascript|457786|然后执行以下操作：|457787|git+init
git+submodule+add+url_to_repo+projectfolder|457788|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In your git dir, suppose you have sync all changes. 

<pre><code>rm -rf .git 

rm -rf .gitmodules
</code></pre>

Then do:

<pre><code>git init
git submodule add url_to_repo projectfolder
</code></pre>

blocks|key|457833|text|您需要首先为git路径删除子模块git存储库(在本例中为projectfolder)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|457834|rm+-rf+projectfolder

git+rm+-r+projectfolder|code-block|syntax|javascript|457835|然后添加子模块|457836|git+submodule+add+<git_submodule_repository>+projectfolder|457837|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You need to remove your submodule git repository (projectfolder in this case) first for git path. 

<pre><code>rm -rf projectfolder

git rm -r projectfolder
</code></pre>

and then add submodule

<pre><code>git submodule add &lt;git_submodule_repository&gt; projectfolder
</code></pre>

blocks|key|240951|text|转到存储库文件夹。从.gitmodules中删除相关子模块。选择显示隐藏文件。进入.git文件夹，从模块文件夹和配置中删除子模块。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|240952|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Go to the repository folder. Delete relevant submodules from .gitmodules. Select show hidden files. Go to .git folder, delete the submodules from module folder and config.

blocks|key|240993|text|如果目标路径中缺少.git文件，则会发生这种情况。这发生在我执行git+clean+-f+-d之后。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|240994|我必须删除消息中显示的所有目标文件夹，然后执行git+submodule+update+--remote|240995|entityMap^0|W|F|0|N|T|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

This happens if the .git file is missing in the target path. It happend to me after I executed <code>git clean -f -d</code>.

I had to delete all target folders showing in the message and then executing <code>git submodule update --remote</code>

blocks|key|241044|text|如果你使用的是Ubuntu，那么记住也要从垃圾桶中删除文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|241045|在我的例子中，我把文件移到了垃圾桶。|241046|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

If you are using Ubuntu then remember to delete files from trash also.
In my Case i moved the files to trash.

I'm new to git and would appreciate help with adding submodules.
I've received two projects sharing some common code. The shared code was just copied into the two projects. I created a separate git repo for the common code and removed it from the projects with the plan to add it as a <code>git</code> submodule.
I used the path option of git submodule add to specify the folder:
<pre><code>git submodule add url_to_repo projectfolder
</code></pre>
but then got the error:
<pre><code>'projectfolder' already exists in the index&quot;
</code></pre>
This is the desired structure of my repository:
<pre><code>repo
|-- projectfolder
 |-- folder with common code
</code></pre>
It is possible to add the <code>git</code> submodule directly in the repo, or into a new folder there, but not in the project folder. The problem is that it really need to be in the project folder..
What can I do about this and what have I misunderstood about the path option of git submodule add?

Issue with adding common code as git submodule: "already exists in the index"

Ubuntu

我是git新手，如果能帮助我添加子模块，我将不胜感激。我已经收到了两个共享一些公共代码的项目。共享代码刚刚被复制到两个项目中。我为通用代码创建了一个单独的git代码库，并将其从项目中删除，并计划将其添加为git子模块。我使用了git子模块add的path选项来指定文件夹：git submodule add url_to...

问将公共代码添加为git子模块的问题：“已存在于索引中”
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