ci: use uv (#564)

Cuts the ci time in half.

---------

Signed-off-by: Henry Schreiner <[email protected]>

.github/workflows/ci.yml

@@ -14,18 +14,20 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  pre-commit:
+  pylint:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v5
+    - name: Setup uv
+      uses: yezz123/setup-uv@v4
       with:
-        python-version: "3.x"
-    - uses: pre-commit/[email protected]
+        uv-venv: ".venv"
+    - name: Install nox
+      run: uv pip install nox
     - name: PyLint
       run: |
         echo "::add-matcher::$GITHUB_WORKSPACE/.github/matchers/pylint.json"
-        pipx run nox -s pylint
+        nox -s pylint
 
   checks:
     runs-on: ubuntu-latest
@@ -38,6 +40,7 @@ jobs:
         - "3.10"
         - "3.11"
         - "3.12"
+
     name: Check Python ${{ matrix.python-version }}
     steps:
     - uses: actions/checkout@v4
@@ -47,19 +50,22 @@ jobs:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: true
 
+    - name: Setup uv
+      uses: yezz123/setup-uv@v4
+      with:
+        uv-venv: ".venv"
+
     - name: Requirements check
-      run: python -m pip list
+      run: uv pip list
 
     - name: Install package
-      run: python -m pip install -e ".[test]"
+      run: uv pip install -e ".[test]"
 
     - name: Test package
       run: python -m pytest
 
     - name: Install plotting requirements too
-      if: matrix.python-version != '3.12'
-      run: python -m pip install -e ".[test,plot]"
+      run: uv pip install -e ".[test,plot]"
 
     - name: Test plotting too
-      if: matrix.python-version != '3.12'
       run: python -m pytest --mpl

noxfile.py

@@ -7,10 +7,9 @@
 
 import nox
 
-ALL_PYTHONS = ["3.7", "3.8", "3.9", "3.10", "3.11"]
-
+nox.needs_version = ">=2024.3.2"
 nox.options.sessions = ["lint", "tests"]
-
+nox.options.default_venv_backend = "uv|virtualenv"
 
 DIR = Path(__file__).parent.resolve()
 
@@ -35,7 +34,7 @@ def pylint(session: nox.Session) -> None:
     session.run("pylint", "hist", *session.posargs)
 
 
-@nox.session(python=ALL_PYTHONS, reuse_venv=True)
+@nox.session(reuse_venv=True)
 def tests(session):
     """
     Run the unit and regular tests.
@@ -102,12 +101,9 @@ def build(session):
     Build an SDist and wheel.
     """
 
-    build_p = DIR.joinpath("build")
-    if build_p.exists():
-        shutil.rmtree(build_p)
-
-    session.install("build")
-    session.run("python", "-m", "build")
+    args = [] if shutil.which("uv") else ["uv"]
+    session.install("build==1.2.0", *args)
+    session.run("python", "-m", "build", "--installer=uv")
 
 
 @nox.session()
@@ -130,6 +126,6 @@ def boost(session):
         session.chdir("boost-histogram")
         session.install(".")
     session.chdir(DIR)
-    session.install("-e.[test,plot]")
+    session.install("-e.[test,plot]", "pip")
     session.run("pip", "list")
     session.run("pytest", *session.posargs)