Quoting "Junio C Hamano" <gits...@pobox.com>:
submodules ever get reorganized and foo is moved to ./bar, then it is
impossible to check out older versions or alternate branches, since
the submodule is no longer where it is expected to be at the origin.
Isn't that exactly what the "module name" vs "module path" mapping
in .gitmodules file is meant to address?
Yes, and as I showed after the part you quoted, it is possible to
refer to a module by name, although it looks like such a hack that I
can't imagine it's currently something that git-submodule is intended
But still, "git submodule update" only looks at the modules in the
currently checked-out tree. If we have other branches or old tags that
refer to other submodules, there's no simple way to fetch those, too.
Didn't I already suggest you to think about how you can improve
existing "git submodule" to suit your use case better?
Yes, and I listed three possible ways. Two of them seem technically
unattractive, whereas one of them (submodules as ref directories)
seems like a huge change that could introduce incompatibilities. That
is why a separate tool seems like a cleaner choice.
If you want enhancements to git-submodule, at least deign to comment
on the issues above.
There is actually a fourth alternative: extend the git protocol so
that a remote repository could be queried for its list of submodules.
But this seems particularly icky: git is at its core such a low-level
framework. Nested repositories are such a high-level concept that
something is wrong if the core needs specialized support for it. The
ref directories approach, on the other hand, is completely transparent
to standard tools.
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