uv

f6f2c5b7 - Collapse redundant dependency clauses enumerating available versions (#6160)

Collapse redundant dependency clauses enumerating available versions (#6160) In https://github.com/astral-sh/uv/issues/5046, we show the tautological proof: ``` ╰─▶ Because colabfold[alphafold]==1.5.5 depends on jax>=0.4.20 and only the following versions of jax are available: jax<=0.4.20 jax==0.4.21 jax==0.4.22 jax==0.4.23 jax==0.4.24 jax==0.4.25 jax==0.4.26 jax==0.4.27 jax==0.4.28 jax==0.4.29 jax==0.4.30 jax==0.4.31 we can conclude that colabfold[alphafold]==1.5.5 depends on jax>=0.4.20. And because jax>=0.4.20 depends on numpy>=1.26.0, we can conclude that colabfold[alphafold]==1.5.5 depends on numpy>=1.26.0. (1) ``` This is a part of the error tree because the statement `colabfold[alphafold]==1.5.5 depends on jax>=0.4.20` is actually a simplification of `colabfold[alphafold]==1.5.5 depends on jax>=0.4.20,<0.5.0` and the no versions clause is a proof of that simplification. Without simplification, the clause looks like: ``` ╰─▶ Because colabfold[alphafold]==1.5.5 depends on jax>=0.4.20,<0.5.0 and only the following versions of jax are available: jax<=0.4.20 jax==0.4.21 jax==0.4.22 jax==0.4.23 jax==0.4.24 jax==0.4.25 jax==0.4.26 jax==0.4.27 jax==0.4.28 jax==0.4.29 jax==0.4.30 jax==0.4.31 we can conclude that colabfold[alphafold]==1.5.5 depends on one of: jax==0.4.20 jax==0.4.21 jax==0.4.22 jax==0.4.23 jax==0.4.24 jax==0.4.25 jax==0.4.26 jax==0.4.27 jax==0.4.28 jax==0.4.29 jax==0.4.30 jax==0.4.31 And because jax>=0.4.20 depends on numpy>=1.26.0, we can conclude that colabfold[alphafold]==1.5.5 depends on numpy>=1.26.0. ``` I don't think we have a great way to avoid performing the simplification of the range conditionally and it makes the error simpler to just jump straight to `colabfold[alphafold]==1.5.5 depends on jax>=0.4.20`. The derivation for this clause looks like: ``` jax==0.4.20 | ==0.4.21 | ==0.4.22 | ==0.4.23 | ==0.4.24 | ==0.4.25 | ==0.4.26 | ==0.4.27 | ==0.4.28 | ==0.4.29 | ==0.4.30 | ==0.4.31 depends on numpy>=1.26.0 no versions of jax>0.4.20, <0.4.21 | >0.4.21, <0.4.22 | >0.4.22, <0.4.23 | >0.4.23, <0.4.24 | >0.4.24, <0.4.25 | >0.4.25, <0.4.26 | >0.4.26, <0.4.27 | >0.4.27, <0.4.28 | >0.4.28, <0.4.29 | >0.4.29, <0.4.30 | >0.4.30, <0.4.31 | >0.4.31, <0.5.0 colabfold[alphafold]==1.5.5 depends on jax>=0.4.20, <0.5.0 ``` So it looks like we can take trees of this form and drop the "no versions" clause _if_ the ranges are compatible[*]. See [this comment](https://github.com/astral-sh/uv/pull/6160#discussion_r1720280922) for a simpler explanation. With this pull request, the clause simplifies to ``` ╰─▶ Because colabfold[alphafold]==1.5.5 depends on jax>=0.4.20 and jax>=0.4.20 depends on numpy>=1.26.0, we can conclude that colabfold[alphafold]==1.5.5 depends on numpy>=1.26.0. (1) ``` Unfortunately, this doesn't change any snapshots in our test suite so I'm uncertain if the strategy generalizes. In some incorrect iterations of this logic, the snapshots did reveal my mistakes. [*] "if the ranges are compatible" includes a bit of hand-waving. I'm not 100% sure if I've chosen the correct range heuristic here.