build: replace hatchling with the uv_build backend - #77
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Also migrates the license metadata to PEP 639 (`license` as an SPDX expression plus `license-files`), which is what uv_build reads to ship LICENSE inside the wheel. The resulting wheel is content-identical to the hatchling one.
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July 29, 2026 06:50
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Switches the build backend from
hatchlingtouv_build, replacing[tool.hatch.build.targets.sdist]with[tool.uv.build-backend]. OnlyCHANGELOG.mdandCONTRIBUTING.mdneed an explicitsource-include- the module,pyproject.toml, README, and LICENSE are in the sdist by default.License metadata moves to PEP 639:
license = "Apache-2.0"pluslicense-files = ["LICENSE"]. That part is required, not cosmetic:uv_buildshipsLICENSEinside the wheel only when it is declared vialicense-files, and uv rejectslicense-filescombined with the legacylicense = { file = ... }table.The
License :: OSI Approved :: Apache Software Licenseclassifier is dropped because PEP 639 deprecates license classifiers in favor ofLicense-Expression, which now carries the same information ("Using license classifier in theClassifierCore Metadata field is deprecated and replaced by the more preciseLicense-Expressionfield"). See also the core metadata spec. uv warns about the classifier on every build.Verified by building sdist + wheel before and after: the wheel contents are identical, and the metadata differs only in
License-Expression: Apache-2.0replacing the inlined license text. The sdist drops.gitignoreand gainspyproject.toml.orig(uv 0.12 writes a TOML 1.0-compatiblepyproject.tomlinto the sdist and keeps the original alongside it).uv.lockis unchanged.Part of the same sweep as apify/crawlee-python#2098, apify/apify-sdk-python#1067, and apify/apify-client-python#980.
✍️ Drafted by Claude Code