Use setuptools-scm for automatic version management (#152)

Replace manual version management with setuptools-scm which derives the
version from git tags at build time. This eliminates the need for a
workflow to push version updates back to main (which required a PAT).

- Add setuptools-scm as build dependency
- Make version field dynamic in pyproject.toml
- Update publish workflow to use setuptools-scm
- Remove update-version.yml workflow

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: Bucknalla

.github/workflows/python-publish.yml

@@ -13,21 +13,19 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - name: Extract version from tag
-      run: echo "TAG_VERSION=${GITHUB_REF#refs/tags/v}" >> $GITHUB_ENV
-    - name: Set version from tag
-      run: sed -i "s/^version = \".*\"/version = \"$TAG_VERSION\"/" pyproject.toml
+      with:
+        fetch-depth: 0  # setuptools-scm needs full git history
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
         python-version: '3.x'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install build twine
+        pip install build twine setuptools-scm
     - name: Verify version
       run: |
-        PACKAGE_VERSION=$(python -c "import tomllib; print(tomllib.load(open('pyproject.toml', 'rb'))['project']['version'])")
+        PACKAGE_VERSION=$(python -m setuptools_scm)
         echo "Publishing version: $PACKAGE_VERSION"
     - name: Build and publish
       env:

.github/workflows/update-version.yml

@@ -1,10 +1,10 @@
 [build-system]
-requires = ["setuptools>=61.0"]
+requires = ["setuptools>=61.0", "setuptools-scm"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "note-python"
-version = "2.1.4"
+dynamic = ["version"]
 description = "Cross-platform Python Library for the Blues Wireless Notecard"
 authors = [
     {name = "Blues Inc.", email = "support@blues.com"},
@@ -35,5 +35,7 @@ Repository = "https://github.com/blues/note-python"
 [tool.setuptools]
 packages = ["notecard"]
 
+[tool.setuptools_scm]
+
 [tool.pytest.ini_options]
 addopts = "--ignore=test/hitl/"