我正在尝试向我的 git 存储库添加一个子模块，但我得到了这个错误:

remote origin does not have a url defined in .git/config

关于这可能是什么的任何想法？我尝试用谷歌搜索它，但只出现一个模糊的链接。

我这样做:

git submodule add ../extern/Lib1 lib  

我希望这会创建一个子模块 lib/Lib1
我知道这只会创建一个引用，然后我必须更新/初始化(这部分不是很清楚，还没有走那么远；我只是在学习子模块命令)。

最佳答案

是否 ../extern/Lib1引用 Git 存储库？
如果没有，Git 将不知道如何将 Git repo url 指向其 .gitmodule。
另外，尝试:

• 目的地lib 不已经存在(甚至是空的)
• 使用绝对路径而不是相对路径(您可以使用相对路径，但以防万一，值得一试)

一些关于子模块的好资源是:

• chapter 8 of Git User's manual
• Wiki page on Git Submodule Tutorial
  当然
• Git submodule man page

由于这里只有绝对路径有效，这意味着相对路径需要一个引用来进行比较。
该引用是应该在您的 DirName/NewRepo_withSubmodules/.git/config 中的“远程来源”文件，像这样:

$ cat .git/config
    ...
    [remote "origin"]
    url = /path/to/DirName/NewRepo_withSubmodules/.git
    fetch = +refs/heads/*:refs/remotes/origin/*
    ...

如果您在 ../DirName/NewRepo_withSubmodules/.git/config 中确实有该部分文件，你应该能够添加 ../Extern/Lib1作为使用相对路径的子模块。

以上所有内容均来自 git submodule 手册页的以下部分:

<repository> is the URL of the new submodule's origin repository.
This may be either an absolute URL, or (if it begins with ./ or ../), the location relative to the superproject's origin repository.

所以如果NewRepo_withSubmodules是刚刚创建的本地 Git 存储库(当然没有“来源”)，应该定义一个人为的“远程来源”(即使来源指向自身)，如果只是为了允许其他子模块的相对 url要使用的存储库。

Git 2.13(2017 年第 2 季度)将改进对子模块默认来源的检测。

参见 commit d1b3b81 (2017 年 2 月 25 日)Stefan Beller ( stefanbeller ) .
^{(由 Junio C Hamano -- gitster -- merge 于 commit ae900eb ，2017 年 3 月 10 日)}

submodule init: warn about falling back to a local path

作为now documented :

<repository> is the URL of the new submodule's origin repository.
This may be either an absolute URL, or (if it begins with ./ or ../), the location relative to the superproject's default remote repository
(Please note that to specify a repository 'foo.git' which is located right next to a superproject 'bar.git', you'll have to use '../foo.git' instead of './foo.git' - as one might expect when following the rules for relative URLs - because the evaluation of relative URLs in Git is identical to that of relative directories).

The default remote is the remote of the remote tracking branch of the current branch.
If no such remote tracking branch exists or the HEAD is detached, "origin" is assumed to be the default remote.
If the superproject doesn't have a default remote configured the superproject is its own authoritative upstream and the current. working directory is used instead.

Git 2.20(2018 年第 4 季度)改进了对子模块的本地路径支持。

参见 commit e0a862f (2018 年 10 月 16 日)Stefan Beller ( stefanbeller ) .
^{(由 Junio C Hamano -- gitster -- merge 于 commit 3fc8522 ，2018 年 11 月 6 日)}

submodule helper: convert relative URL to absolute URL if needed

The submodule helper update_clone called by "git submodule update", clones submodules if needed.
As submodules used to have the URL indicating if they were active, the step to resolve relative URLs was done in the "submodule init" step. Nowadays submodules can be configured active without calling an explicit init, e.g. via configuring submodule.active.

When trying to obtain submodules that are set active this way, we'll fallback to the URL found in the .gitmodules, which may be relative to the superproject, but we do not resolve it, yet:

git clone https://gerrit.googlesource.com/gerrit

cd gerrit && grep url .gitmodules
url = ../plugins/codemirror-editor
...
git config submodule.active .
git submodule update
fatal: repository '../plugins/codemirror-editor' does not exist
fatal: clone of '../plugins/codemirror-editor' into submodule path '/tmp/gerrit/plugins/codemirror-editor' failed
Failed to clone 'plugins/codemirror-editor'. Retry scheduled
[...]
fatal: clone of '../plugins/codemirror-editor' into submodule path '/tmp/gerrit/plugins/codemirror-editor' failed
Failed to clone 'plugins/codemirror-editor' a second time, aborting
[...]

To resolve the issue, factor out the function that resolves the relative URLs in "git submodule init" (in the submodule helper in the init_submodule function) and call it at the appropriate place in the update_clone helper.

关于git - 指定为相对路径时无法添加 git 子模块，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/1974181/