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Implement PEP 440-compliant local version semantics (#8797)

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Implement a full working version of local version semantics. The (AFAIA)
major move towards this was implemented in #2430. This added support
such that the version specifier `torch==2.1.0+cpu` would install
`torch@2.1.0+cpu` and consider `torch@2.1.0+cpu` a valid way to satisfy
the requirement `torch==2.1.0` in further dependency resolution.

In this feature, we more fully support local version semantics. Namely,
we now allow `torch==2.1.0` to install `torch@2.1.0+cpu` regardless of
whether `torch@2.1.0` (no local tag) actually exists.

We do this by adding an internal-only `Max` value to local versions that
compare greater to all other local versions. Then we can translate
`torch==2.1.0` into bounds: greater than 2.1.0 with no local tag and
less than 2.1.0 with the `Max` local tag.

Depends on https://github.com/astral-sh/packse/pull/227.
This commit is contained in:
Eric Mark Martin 2024-11-05 22:18:43 -05:00 • committed by Zanie Blue
parent 8ef5949294
commit c49c7bdf97
15 changed files with 631 additions and 840 deletions
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4
crates/uv-python/src/discovery.rs
View file

@ -2125,7 +2125,9 @@ impl FromStr for VersionRequest {
return Err(Error::InvalidVersionRequest(s.to_string()));
}
let [uv_pep440::LocalSegment::String(local)] = version.local() else {
let uv_pep440::LocalVersionSlice::Segments([uv_pep440::LocalSegment::String(local)]) =
version.local()
else {
return Err(Error::InvalidVersionRequest(s.to_string()));
};