build: migrate from poetry to uv

Convert to PEP 621 pyproject with uv_build backend (flat layout,
module-root = ""). Library published to PyPI. Re-lock with uv.lock,
remove pbr/setuptools_scm setup.py/setup.cfg leftovers, and migrate
test/publish CI workflows from poetry to uv.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: FelixAbrahamsson

.github/workflows/publish.yml

@@ -9,27 +9,24 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python
-        uses: actions/setup-python@v4
+      - name: Set up uv
+        uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39 # v8.2.0
         with:
           python-version: "3.12"
+          enable-cache: true
       - name: Install dependencies
-        run: |
-          curl -sSL https://install.python-poetry.org | python - --version 1.8.5
-          poetry install
+        run: uv sync --locked
 
       - name: Run tests
-        run: |
-          poetry run pytest
+        run: uv run --no-sync pytest
 
       - name: Build wheels
         run: |
-          poetry version $(git tag --points-at HEAD)
-          poetry build
+          uv version "$(git tag --points-at HEAD)"
+          uv build
 
       - name: Upload
         env:
-          USERNAME: __token__
-          PASSWORD: ${{ secrets.PYPI_TOKEN }}
-        run: |
-          poetry publish --username=$USERNAME --password=$PASSWORD
+          UV_PUBLISH_USERNAME: __token__
+          UV_PUBLISH_PASSWORD: ${{ secrets.PYPI_TOKEN }}
+        run: uv publish

.github/workflows/test.yml

@@ -11,32 +11,20 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+      - name: Set up uv
+        uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39 # v8.2.0
         with:
           python-version: ${{ matrix.python-version }}
-
-      - name: Cache pip
-        uses: actions/cache@v4
-        with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ hashFiles('pyproject.toml') }}-${{ hashFiles('poetry.lock') }}-${ GITHUB_REF }
-          restore-keys: |
-            ${{ runner.os }}-pip-
-            ${{ runner.os }}-
+          enable-cache: true
 
       - name: Install dependencies
-        run: |
-          curl -sSL https://install.python-poetry.org | python - --version 1.8.5
-          poetry install
+        run: uv sync --locked
 
       - name: Run tests
-        run: |
-          poetry run pytest
+        run: uv run --no-sync pytest
 
       - name: Build wheels
-        run: |
-          poetry build
+        run: uv build
 
   build-docs:
     runs-on: ubuntu-latest

poetry.lock

@@ -1,26 +1,27 @@
-[tool.poetry]
+[project]
 name = "kw6"
 version = "0.0.0"
 description = "Minimalistic library for reading files in the kw6 file format"
-authors = ["NextML AB"]
-license = "Apache 2.0"
+authors = [{ name = "NextML AB" }]
+requires-python = ">=3.9,<3.13"
+license = "Apache-2.0"
+dependencies = [
+    "numpy>=1.21.2,<2",
+    "Pillow>=10.0,<12",
+    "pydantic>=2.0.0,<3",
+]
 
-[tool.poetry.dependencies]
-# Floor raised to 3.9 so numpy/Pillow resolve to lines that ship cp312 wheels
-# (numpy 1.26 / Pillow 10 dropped 3.8); ceiling <3.13 for Python 3.12.
-python = ">=3.9,<3.13"
-numpy = "^1.21.2"
-# Pillow >=10 is the first line with cp312 wheels; <12 keeps the 3.8 floor
-# satisfiable (Pillow 11 dropped 3.8).
-Pillow = ">=10.0,<12"
-pydantic = "^2.0.0"
-
-[tool.poetry.dev-dependencies]
-tqdm = "^4.62.2"
-pytest = "^6.2.5"
-flake8 = "^3.9.2"
-ipykernel = "^6.4.1"
+[dependency-groups]
+dev = [
+    "tqdm>=4.62.2,<5",
+    "pytest>=6.2.5,<7",
+    "flake8>=3.9.2,<4",
+    "ipykernel>=6.4.1,<7",
+]
 
 [build-system]
-requires = ["poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["uv_build>=0.11.25,<0.12"]
+build-backend = "uv_build"
+
+[tool.uv.build-backend]
+module-root = ""