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Init of submodule within subtree not working


currently I’m having trouble using subtree to include a subproject
that itself contains submodules.

$ git subtree add --prefix folderB/subtreeproject https:\\xx master --squash

The resulting structure is something like the following:

├── .git/
├── .gitmodules
└── folderA/
    ├── someFileA
    └── submoduleA /
└── folderB/
    ├── someFileB
    └── subtreeproject/   <= THE SUBTREE
        ├── .gitmodules
        ├── someFolder/
        └── submoduleInSubtree/   <= THE SUBMODULE IN SUBTREE

The subtreeproject contains its own submodule and therefore its own .gitmodules.

If I now run
$ git submodule update --init --remote
I get the error
fatal: No url found for submodule path
‘folderB/subtreeproject/submoduleInSubtree’ in .gitmodules

The only way I could get the submodule initialized is by manually
copying the contents of the folder/subtreeproject/.gitmodules to the
top-level .gitmodules and adjusting the path accordingly, which is
quite annoying.

Is this behavior intended? Isn’t there a more elegant solution?

Couldn’t git respect .gitmodules not only in the root directory but
also in any sub-directory? I learned it already works for submodules
within other submodules, but apparently not for submodules within

My git version:
$ git version 2.21.0.windows.1

Best regards

Thomas Kitzinger