We allowed `[badges]` to inherit from `[workspace.package.badges]`
This was a bug:
- This was not specified in the RFC
- We did not document this
- Even if someone were to try to guess to use this, it is inconsistent
with how inheritance works because this should inherit from
`workspace.badges` instead of `workspace.package.badges`
While keeping in mind that `[badges]` is effectively deprecated.
In that context, I think its safe to break support for this without a
transition period.
Fixes#13643
feat: Add 'open-namespaces' feature
### What does this PR try to resolve?
This is a step towards #13576
### How should we test and review this PR?
### Additional information
We used several strategies
- Relying in `impl Ord for RustVersion`
- Converting to version requirements
- Decrementing a version
This consolidates around one strategy: `RustVersion::is_compatible_with`
- Ensure the comparisons have the same behavior
- Centralize knowledge of how to handle pre-release rustc
- Losslessly allow comparing with either rustc or workspace msrv
This will require a version bump every release but over-releasing these
packages is likely a lot better than over-releasing the N-3 packages,
which we won't have to do anymore after this.
My hope is the `auto` value will be approved and stabilized and then we
won't have to over-release anymore.
Inspired by my having forgotten to add `[lints]` to the if sequence.
Previously, we added a comment to suggest this but the further the code
is, the harder it is to track.
I considered a custom `Deserialize` impl, possibly through a new type,
that would error.
This would be the more "pure" solution.
Unfortunately, this would also have worse errors because the errors
would be reported to the `Deserializer` at the document-level, rather
than directly on the individual fields.
Well, we don't do on individual fields now but it is something we will
soon be exploring.
The use of `flatten` was getting in the way of `serde_ignored`.
A common workaround is to add our own `unused` tracking but that would
cause duplicates with `workspace.lints` (or we'd just ignore it).
Since the manual deserializer was relatively simple, I went that route.
Fixes#12917
