Check for git submodules in non-git source tree. #95849
Merged
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People occasionally download the source from https://github.com/rust-lang/rust/releases, but those source distributions will not work because they are missing the submodules. They will get a confusing
failed to load manifest for workspace member
error.Unfortunately AFAIK there is no way to disable the GitHub source links. This change tries to detect this scenario and provide an error message that guides them toward a solution.
Closes #95608