Re: [RFC] URL rewrite in .gitmodules

[Stefan Beller <sbeller@google.com>]

On Mon, Oct 19, 2015 at 12:28 PM, Lars Schneider
<larsxschneider@gmail.com> wrote:
> Hi,
>
> I have a closed source Git repo which references an Open Source Git repo as Submodule. The Open Source Git repo references yet another Open Source repo as submodule. In order to avoid failing builds due to external services I mirrored the Open Source repos in my company network. That works great with the first level of Submodules. Unfortunately it does not work with the second level because the first level still references the "outside of company" repos. I know I can rewrite Git URLs with the git config "url.<base>.insteadOf" option. However, git configs are client specific.

I feel like this is working as intended. You only want to improve your
one client (say the buildbot) to not goto the open source site, while
the developer may do want to fetch from external sources ("Hey shiny
new code!";)


> I would prefer a solution that works without setup on any client. I also know that I could update the .gitmodules file in the Open Source repo on the first level. I also would prefer not to do this as I want to use the very same hashes as defined by the "upstream" Open Source repos.

You could carry a patch on top of the tip of the first submodule
re-pointing the nested submodule. This requires good workflows
available to deal with submodules though. (Fetch and merge or rebase,
git submodule update should be able to do that?)

>
> Is there yet another way in Git to change URLs of Submodules in the way I want it?
>
> If not, what do you think about a patch that adds a "url" section similar to the one in git config to a .gitmodules file?
>

So we have different kinds of git configs. within one repository, in
the home director (global to the one machine),
maybe you would want to have one "global" config on a network share,
such that every box in your company
reads that "company-wide" global config and acts upon that?

> Example:
> ----------
> [submodule "git"]
>         path = git
>         url=git://github.com/larsxschneider/git.git
>
> [url "mycompany.com"]
>         insteadOf = outside.com

Wouldn't that be better put into say a global git config instead of
repeating it for every submodule?

In case of the nested submodule you would need to carry the last lines
as an extra patch anyway
if this was done in the .gitmodules files? Or do you expect this to be
applied recursively (i.e. nested
submodules all the way down also substitute outside.com)


> ----------
>

Am I missing your point?

> Thanks,
> Lars--
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