Use flit to build pip distributions

Author: notatallshaw

.github/workflows/ci.yml

@@ -82,7 +82,7 @@ jobs:
       - run: pip install nox
       - run: nox -s prepare-release -- 99.9
       - run: nox -s build-release -- 99.9
-      - run: pipx run check-manifest
+      - run: pipx run check-sdist
 
   vendoring:
     name: vendoring

MANIFEST.in

@@ -1,2 +1,2 @@
 build
-setuptools
+flit-core

build-project/build-requirements.in

@@ -8,17 +8,15 @@ build==1.2.2.post1 \
     --hash=sha256:1d61c0887fa860c01971625baae8bdd338e517b836a2f70dd1f7aa3a6b2fc5b5 \
     --hash=sha256:b36993e92ca9375a219c99e606a122ff365a760a2d4bba0caa09bd5278b608b7
     # via -r build-requirements.in
-packaging==24.2 \
-    --hash=sha256:09abb1bccd265c01f4a3aa3f7a7db064b36514d2cba19a2f694fe6150451a759 \
-    --hash=sha256:c228a6dc5e932d346bc5739379109d49e8853dd8223571c7c5b55260edc0b97f
+flit-core==3.12.0 \
+    --hash=sha256:18f63100d6f94385c6ed57a72073443e1a71a4acb4339491615d0f16d6ff01b2 \
+    --hash=sha256:e7a0304069ea895172e3c7bb703292e992c5d1555dd1233ab7b5621b5b69e62c
+    # via -r build-requirements.in
+packaging==25.0 \
+    --hash=sha256:29572ef2b1f17581046b3a2227d5c611fb25ec70ca1ba8554b24b0e69331a484 \
+    --hash=sha256:d443872c98d677bf60f6a1f2f8c1cb748e8fe762d2bf9d3148b5599295b0fc4f
     # via build
 pyproject-hooks==1.2.0 \
     --hash=sha256:1e859bd5c40fae9448642dd871adf459e5e2084186e8d2c2a79a824c970da1f8 \
     --hash=sha256:9e5c6bfa8dcc30091c74b0cf803c81fdd29d94f01992a7707bc97babb1141913
     # via build
-
-# The following packages are considered to be unsafe in a requirements file:
-setuptools==80.9.0 \
-    --hash=sha256:062d34222ad13e0cc312a4c02d73f059e86a4acbfbdea8f8f76b28c99f306922 \
-    --hash=sha256:f36b47402ecde768dbfafc46e8e4207b4360c654f1f3bb84475f0a28628fb19c
-    # via -r build-requirements.in

build-project/build-requirements.txt

@@ -18,7 +18,6 @@ The ``README``, license, ``pyproject.toml``, and so on are in the top level.
 
 * ``AUTHORS.txt``
 * ``LICENSE.txt``
-* ``MANIFEST.in``
 * ``NEWS.rst``
 * ``pyproject.toml``
 * ``README.rst``

docs/html/development/architecture/anatomy.rst

@@ -1,6 +1,5 @@
 [project]
 dynamic = ["version"]
-
 name = "pip"
 description = "The PyPA recommended tool for installing Python packages."
 readme = "README.rst"
@@ -45,31 +44,53 @@ Source = "https://github.com/pypa/pip"
 Changelog = "https://pip.pypa.io/en/stable/news/"
 
 [build-system]
-requires = ["setuptools>=77"]
-build-backend = "setuptools.build_meta"
-
-[tool.setuptools]
-package-dir = {"" = "src"}
-include-package-data = false
-
-[tool.setuptools.dynamic]
-version = {attr = "pip.__version__"}
-
-[tool.setuptools.packages.find]
-where = ["src"]
-exclude = ["contrib", "docs", "tests*", "tasks"]
-
-[tool.setuptools.package-data]
-"pip" = ["py.typed"]
-"pip._vendor" = ["vendor.txt"]
-"pip._vendor.certifi" = ["*.pem"]
-"pip._vendor.distlib" = [
-    "t32.exe",
-    "t64.exe",
-    "t64-arm.exe",
-    "w32.exe",
-    "w64.exe",
-    "w64-arm.exe",
+requires = ["flit-core >=3.8,<4"]
+build-backend = "flit_core.buildapi"
+
+[tool.flit.module]
+name = "pip"
+path = "src/pip"
+
+[tool.flit.sdist]
+include = [
+  "AUTHORS.txt",
+  "LICENSE.txt",
+  "NEWS.rst",
+  "README.rst",
+  "SECURITY.md",
+  "pyproject.toml",
+  "build-project/build-requirements.in",
+  "build-project/build-requirements.txt",
+  "build-project/build-project.py",
+  "build-project/.python-version",
+  "src/pip/_vendor/README.rst",
+  "src/pip/_vendor/vendor.txt",
+  "src/pip/_vendor/**/*LICENSE*",
+  "src/pip/_vendor/**/*COPYING*",
+  "docs/requirements.txt",
+  "src/pip/_vendor/**/*.pem",
+  "src/pip/_vendor/**/py.typed",
+  "docs/**/*.css",
+  "docs/**/*.py",
+  "docs/**/*.rst",
+  "docs/**/*.md",
+  "docs/**/*.dot",
+  "docs/**/*.png",
+]
+
+exclude = [
+  ".git-blame-ignore-revs",
+  ".mailmap",
+  ".readthedocs.yml",
+  ".pre-commit-config.yaml",
+  ".readthedocs-custom-redirects.yml",
+  "noxfile.py",
+  "*.pyi",
+  ".github/**",
+  "docs/build/**",
+  "news/**",
+  "tests/**",
+  "tools/**",
 ]
 
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