Check in package/publish if a git submodule is dirty. #7245
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This extends the "dirty" check during
cargo publish
to check files within a submodule.It is a little crude, since it unconditionally tries to open every submodule even if it is not relevant to the current package. The performance doesn't seem too bad (~2s for rust-lang/rust with 16 submodules).
It's also a little lax, by ignoring uninitialized submodules. Presumably the verification build will fail if the submodule is not initialized. It could be more aggressive, by requiring all submodules to be initialized?
Closes #3622