DM-32408: Derive resources version number during build

.github/workflows/build.yaml

@@ -13,7 +13,10 @@ jobs:
     # github change
     runs-on: ubuntu-20.04
     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:
@@ -64,7 +67,7 @@ jobs:
       - name: Build and install
         shell: bash -l {0}
         run: |
-          pip install -v -e .
+          python -m pip install --no-deps -v -e .
 
       - name: Run tests
         shell: bash -l {0}

.github/workflows/build_docs.yaml

@@ -10,12 +10,17 @@ jobs:
   build_sphinx_docs:
     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
 
       - 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: Update pip/wheel infrastructure
         run: |

.github/workflows/docstyle.yaml

@@ -10,12 +10,13 @@ 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
+          cache: "pip"
 
       - name: Install
         run: pip install pydocstyle

.github/workflows/formatting.yaml

@@ -11,12 +11,13 @@ jobs:
     runs-on: ubuntu-latest
     name: check Python formatting
     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
+          cache: "pip"
 
       - name: Install isort and black
         run: pip install isort black

.github/workflows/lint.yaml

@@ -10,12 +10,13 @@ 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
+          cache: "pip"
 
       - name: Install
         run: pip install -r <(curl https://raw.githubusercontent.com/lsst/linting/main/requirements.txt)

.github/workflows/mypy.yaml

@@ -11,12 +11,13 @@ jobs:
     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
+          cache: "pip"
 
       - name: Install
         run: pip install mypy

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.resources"
     package_dir = "python"
@@ -49,3 +53,6 @@ target-version = ["py38"]
 [tool.isort]
 profile = "black"
 line_length = 110
+
+[tool.lsst_versions]
+write_to = "python/lsst/resources/version.py"

setup.cfg

@@ -10,6 +10,7 @@ classifiers =
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.8
     Topic :: Scientific/Engineering :: Astronomy
+readme = file: README.md
 
 [options]
 zip_safe = True