DM-32408: Enable version detection for setuptools build

.github/workflows/build.yaml

@@ -1,19 +1,26 @@
 name: build_and_test
 
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - main
+  pull_request:
 
 jobs:
   build_and_test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+        with:
+          # Need to clone everything to determine version from git.
+          fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8
+          cache: "pip"
+          cache-dependency-path: "setup.cfg"
 
       - name: Build and install
         run: |

.github/workflows/cmake.yaml

@@ -10,10 +10,13 @@ jobs:
   cmake:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+        with:
+          # Need to clone everything to determine version from git.
+          fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: 3.8
 

.github/workflows/lint.yaml

@@ -1,19 +1,21 @@
 name: lint
 
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - main
+  pull_request:
 
 jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
-          python-version: 3.7
+          python-version: 3.8
 
       - name: Install
         run: pip install -r <(curl https://raw.githubusercontent.com/lsst/linting/main/requirements.txt)

pyproject.toml

@@ -5,4 +5,8 @@ requires = [
     "wheel",
     "pybind11 >= 2.5.0",
     "numpy >= 1.18",
+    "lsst-versions",
 ]
+
+[tool.lsst_versions]
+write_to = "python/lsst/sphgeom/version.py"

setup.py

@@ -16,17 +16,6 @@
 from setuptools import setup
 from pybind11.setup_helpers import Pybind11Extension, build_ext
 
-# Currently a fake version for testing
-version = '0.0.1'
-
-# To enable consistency with sconsUtils we write the version to the
-# same location
-with open("./python/lsst/sphgeom/version.py", "w") as f:
-    print(f"""
-__all__ = ("__version__", )
-__version__ = '{version}'""", file=f)
-
-
 # Find the source code -- we can combine it into a single module
 pybind_src = sorted(glob.glob("python/lsst/sphgeom/*.cc"))
 cpp_src = sorted(glob.glob("src/*.cc"))
@@ -38,7 +27,6 @@
                                  include_dirs=["include"])]
 
 setup(
-    version=version,
     ext_modules=ext_modules,
     cmdclass={'build_ext': build_ext},
 )