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Ignore upper-bounds on Requires-Python (#4086)

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## Summary

This PR modifies our `Requires-Python` handling to treat
`Requires-Python` as a lower bound. There's extensive discussion around
this in https://github.com/astral-sh/uv/issues/4022 and the references
linked therein. I think it's an experiment worth trying. Even in my own
small projects, I'm running into issues whereby I'm being "forced" to
add a `<4` upper bound to my `Requires-Python` due to these caps.

Separately, we should explore adding a mechanism that's distinct from
`Requires-Python` to enable users to declare a supported range for
locking.

Closes https://github.com/astral-sh/uv/issues/4022.
This commit is contained in:
Charlie Marsh 2024-06-06 13:52:57 -04:00 • committed by GitHub
parent 30e73a60de
commit 31bb01f0be
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5 changed files with 143 additions and 62 deletions
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2
crates/uv-resolver/src/resolver/mod.rs
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@ -730,7 +730,7 @@ impl<InstalledPackages: InstalledPackagesProvider> ResolverState<InstalledPackag
// The version is incompatible due to its Python requirement.
if let Some(requires_python) = metadata.requires_python.as_ref() {
if let Some(target) = self.python_requirement.target() {
if !target.subset_of(requires_python) {
if !target.contains(requires_python) {
return Ok(Some(ResolverVersion::Unavailable(
version.clone(),
UnavailableVersion::IncompatibleDist(IncompatibleDist::Source(