Use uv in CI.

Author: Julian

.github/workflows/ci.yml

@@ -7,44 +7,32 @@ on:
     tags:
       - "v*"
   pull_request:
-  release:
-    types: [published]
   schedule:
     # Daily at 3:21
     - cron: "21 3 * * *"
   workflow_dispatch:
 
-env:
-  PIP_DISABLE_PIP_VERSION_CHECK: "1"
-  PIP_NO_PYTHON_VERSION_WARNING: "1"
-
 jobs:
-  pre-commit:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.x"
-      - uses: pre-commit/action@v3.0.1
-
   list:
     runs-on: ubuntu-latest
     outputs:
       noxenvs: ${{ steps.noxenvs-matrix.outputs.noxenvs }}
     steps:
       - uses: actions/checkout@v4
-      - name: Set up nox
-        uses: wntrblm/nox@2024.10.09
+      - name: Set up uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          enable-cache: true
       - id: noxenvs-matrix
         run: |
           echo >>$GITHUB_OUTPUT noxenvs=$(
-            nox --list-sessions --json | jq '[.[].session]'
+            uvx nox --list-sessions --json | jq '[.[].session]'
           )
 
   ci:
     needs: list
     runs-on: ${{ matrix.os }}
+
     strategy:
       fail-fast: false
       matrix:
@@ -53,10 +41,10 @@ jobs:
         posargs: [""]
         include:
           - os: ubuntu-latest
-            noxenv: "tests-3.11(format)"
+            noxenv: "tests-3.13(format)"
             posargs: coverage github
           - os: ubuntu-latest
-            noxenv: "tests-3.11(no-extras)"
+            noxenv: "tests-3.13(no-extras)"
             posargs: coverage github
         exclude:
           - os: windows-latest
@@ -89,20 +77,25 @@ jobs:
             3.13
             pypy3.10
           allow-prereleases: true
-      - name: Set up nox
-        uses: wntrblm/nox@2024.10.09
       - name: Enable UTF-8 on Windows
         run: echo "PYTHONUTF8=1" >> $env:GITHUB_ENV
         if: runner.os == 'Windows' && startsWith(matrix.noxenv, 'tests')
+
+      - name: Set up uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          enable-cache: true
+
       - name: Run nox
-        run: nox -s "${{ matrix.noxenv }}" -- ${{ matrix.posargs }}
+        run: uvx nox -s "${{ matrix.noxenv }}" -- ${{ matrix.posargs }}
 
   packaging:
     needs: ci
     runs-on: ubuntu-latest
     environment:
       name: PyPI
       url: https://pypi.org/p/jsonschema
+
     permissions:
       contents: write
       id-token: write
@@ -111,14 +104,14 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Set up Python
-        uses: actions/setup-python@v5
+      - name: Set up uv
+        uses: astral-sh/setup-uv@v5
         with:
-          python-version: "3.x"
-      - name: Install dependencies
-        run: python -m pip install build
-      - name: Create packages
-        run: python -m build .
+          enable-cache: true
+
+      - name: Build our distributions
+        run: uv run --with 'build[uv]' -m build --installer=uv
+
       - name: Publish to PyPI
         if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
         uses: pypa/gh-action-pypi-publish@release/v1

noxfile.py

@@ -22,7 +22,7 @@
     docs=DOCS / "requirements.txt",
 )
 REQUIREMENTS_IN = [  # this is actually ordered, as files depend on each other
-    path.parent / f"{path.stem}.in" for path in REQUIREMENTS.values()
+    (path.parent / f"{path.stem}.in", path) for path in REQUIREMENTS.values()
 ]
 
 NONGPL_LICENSES = [
@@ -38,6 +38,7 @@
 SUPPORTED = ["3.9", "3.10", "pypy3.10", "3.11", "3.12", "3.13"]
 LATEST_STABLE = SUPPORTED[-1]
 
+nox.options.default_venv_backend = "uv|virtualenv"
 nox.options.sessions = []
 
 
@@ -136,9 +137,15 @@ def build(session):
     """
     Build a distribution suitable for PyPI and check its validity.
     """
-    session.install("build", "docutils", "twine")
+    session.install("build[uv]", "docutils", "twine")
     with TemporaryDirectory() as tmpdir:
-        session.run("python", "-m", "build", ROOT, "--outdir", tmpdir)
+        session.run(
+            "pyproject-build",
+            "--installer=uv",
+            ROOT,
+            "--outdir",
+            tmpdir,
+        )
         session.run("twine", "check", "--strict", tmpdir + "/*")
         session.run(
             "python", "-m", "docutils", "--strict", CHANGELOG, os.devnull,
@@ -247,13 +254,13 @@ def requirements(session):
 
     You should commit the result afterwards.
     """
-    session.install("pip-tools")
-    for each in REQUIREMENTS_IN:
-        session.run(
-            "pip-compile",
-            "--resolver",
-            "backtracking",
-            "--strip-extras",
-            "-U",
-            each.relative_to(ROOT),
-        )
+    if session.venv_backend == "uv":
+        cmd = ["uv", "pip", "compile"]
+    else:
+        session.install("pip-tools")
+        cmd = ["pip-compile", "--resolver", "backtracking", "--strip-extras"]
+
+    for each, out in REQUIREMENTS_IN:
+        # otherwise output files end up with silly absolute path comments...
+        relative = each.relative_to(ROOT)
+        session.run(*cmd, "--upgrade", "--output-file", out, relative)