Zanie Blue e1878c8359 Consider installed packages during resolution (#2596) ... Previously, we did not consider installed distributions as candidates while performing resolution. Here, we update the resolver to use installed distributions that satisfy requirements instead of pulling new distributions from the registry. The implementation details are as follows: - We now provide `SitePackages` to the `CandidateSelector` - If an installed distribution satisfies the requirement, we prefer it over remote distributions - We do not want to allow installed distributions in some cases, i.e., upgrade and reinstall - We address this by introducing an `Exclusions` type which tracks installed packages to ignore during selection - There's a new `ResolvedDist` wrapper with `Installed(InstalledDist)` and `Installable(Dist)` variants - This lets us pass already installed distributions throughout the resolver The user-facing behavior is thoroughly covered in the tests, but briefly: - Installing a package that depends on an already-installed package prefers the local version over the index - Installing a package with a name that matches an already-installed URL package does not reinstall from the index - Reinstalling (--reinstall) a package by name _will_ pull from the index even if an already-installed URL package is present - To reinstall the URL package, you must specify the URL in the request Closes https://github.com/astral-sh/uv/issues/1661 Addresses: - https://github.com/astral-sh/uv/issues/1476 - https://github.com/astral-sh/uv/issues/1856 - https://github.com/astral-sh/uv/issues/2093 - https://github.com/astral-sh/uv/issues/2282 - https://github.com/astral-sh/uv/issues/2383 - https://github.com/astral-sh/uv/issues/2560 ## Test plan - [x] Reproduction at `charlesnicholson/uv-pep420-bug` passes - [x] Unit test for editable package ([#1476](https://github.com/astral-sh/uv/issues/1476)) - [x] Unit test for previously installed package with empty registry - [x] Unit test for local non-editable package - [x] Unit test for new version available locally but not in registry ([#2093](https://github.com/astral-sh/uv/issues/2093)) - ~[ ] Unit test for wheel not available in registry but already installed locally ([#2282](https://github.com/astral-sh/uv/issues/2282))~ (seems complicated and not worthwhile) - [x] Unit test for install from URL dependency then with matching version ([#2383](https://github.com/astral-sh/uv/issues/2383)) - [x] Unit test for install of new package that depends on installed package does not change version ([#2560](https://github.com/astral-sh/uv/issues/2560)) - [x] Unit test that `pip compile` does _not_ consider installed packages		2024-03-28 13:49:17 -05:00
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__init__.py	Consider installed packages during resolution (#2596)	2024-03-28 13:49:17 -05:00