move lenskit into monopackage

Author: mdekstrand

.gitignore

@@ -40,7 +40,8 @@ dist/
 *.lib
 *.o
 *.obj
-lenskit/**/*.c
+src/lenskit/**/*.c
+src/lenskit/_version.py
 
 # environment locks that aren't committed
 /*env*.yml
@@ -59,4 +60,3 @@ conda*.lock
 .vscode/c_cpp_properties.json
 # pixi environments
 .pixi
-*.egg-info

pyproject.toml

@@ -1,3 +1,90 @@
+[build-system]
+requires = ["hatchling ~=1.0", "hatch-vcs ~=0.4.0"]
+build-backend = "hatchling.build"
+
+[project]
+name = "lenskit"
+description = "Toolkit for recommender systems research, teaching, and more."
+authors = [{ name = "Michael Ekstrand", email = "[email protected]" }]
+classifiers = [
+  "License :: OSI Approved :: MIT License",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
+  "Operating System :: OS Independent",
+  "Intended Audience :: Science/Research",
+]
+requires-python = ">= 3.11"
+readme = "README.md"
+license = { file = "LICENSE.md" }
+dynamic = ["version"]
+dependencies = [
+  "typing-extensions ~=4.12",
+  "pandas ~=2.0",
+  "pyarrow >=15",
+  "numpy >=1.25",
+  "scipy >=1.11",
+  "torch ~=2.4",
+  "more-itertools >=9.0",
+  "threadpoolctl >=3.0",
+  "structlog >=23.2",
+  "rich ~=13.5",
+  "pyzmq >=24",
+  "click ~=8.1",
+  "pydantic ~=2.7",
+  "humanize ~=4.2",
+  "prettytable ~=3.14",
+]
+
+[project.optional-dependencies]
+notebook = ["ipywidgets ~=8.0"]
+ray = ["ray ~=2.42"]
+# test deps — keep synchronized with pixi.toml
+test = [
+  "pytest >=8.2,<9",
+  "pytest-doctestplus >=1.2.1,<2",
+  "pytest-cov >=2.12",
+  "pytest-benchmark ==4.*",
+  "pytest-repeat >=0.9",
+  "hypothesis >=6.16",
+  "pyprojroot ==0.3.*",
+]
+
+[project.urls]
+homepage = "https://lenskit.org"
+documentation = "https://lkpy.lenskit.org"
+source = "https://github.com/lenskit/lkpy"
+
+[project.scripts]
+lenskit = "lenskit.cli:lenskit"
+
+# configure build tools
+[tool.hatch.metadata]
+allow-direct-references = true
+
+[tool.hatch.build.targets.sdist]
+include = ["/lenskit", "LICENSE.md", "README.md"]
+
+[tool.hatch.build.targets.wheel]
+packages = ["lenskit"]
+
+[tool.hatch.version]
+source = "vcs"
+raw-options = { root = "..", version_scheme = "guess-next-dev" }
+
+[tool.hatch.build.hooks.vcs]
+version-file = "lenskit/_version.py"
+
+# override where UV gets pytorch for CI installs
+[[tool.uv.index]]
+name = "pytorch-cpu"
+url = "https://download.pytorch.org/whl/cpu"
+explicit = true
+
+[tool.uv.sources]
+torch = [{ index = "pytorch-cpu" }]
+
 # dev tool configuration
 [tool.coverage.run]
 relative_files = "true"
@@ -31,7 +118,6 @@ known-first-party = ["lenskit"]
 [tool.ruff.lint.isort.sections]
 testing = ["pytest", "hypothesis"]
 
-
 [tool.pyright]
 typeCheckingMode = "basic"
 exclude = ["docs/*", ".pixi", ".venv"]