DM-32408: Use lsst-versions to determine setuptools package version

.github/workflows/build.yaml

@@ -10,7 +10,10 @@ jobs:
   build_and_test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+        with:
+          # Need to clone everything for the git tags.
+          fetch-depth: 0
 
       - uses: conda-incubator/setup-miniconda@v2
         with:

.github/workflows/formatting.yaml

@@ -10,10 +10,10 @@ 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: 3.8
 

.github/workflows/lint.yaml

@@ -10,10 +10,10 @@ 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: 3.8
 

doc/changes/DM-32408.feature.rst

@@ -0,0 +1 @@
+Builds using ``setuptools`` now calculate versions from the Git repository, including the use of alpha releases for those associated with weekly tags.

pyproject.toml

@@ -1,3 +1,7 @@
+[build-system]
+requires = ["setuptools", "lsst-versions"]
+build-backend = "setuptools.build_meta"
+
 [tool.towncrier]
     package = "lsst.ctrl.mpexec"
     package_dir = "python"
@@ -44,3 +48,6 @@ target-version = ["py38"]
 [tool.isort]
 profile = "black"
 line_length = 110
+
+[tool.lsst_versions]
+write_to = "python/lsst/ctrl/mpexec/version.py"

setup.cfg

@@ -10,6 +10,8 @@ classifiers =
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.8
     Topic :: Scientific/Engineering :: Astronomy
+long_description = file: README.rst
+long_description_content_type = text/x-rst
 
 [options]
 zip_safe = True