Use setuptools_scm for package versions (#243)

Removes some extra `build-system.requires` entries.

So far, repository versions were date-based (well, there was only one, v20230717). The Python package had a constant version number `0.0.0a1`.
To work well with the default setuptools_scm schema, future releases should ideally use `vYYYY.MM.DD` tags.
The Python package will then also have the same version as the benchmark collection as such.

src/python/benchmark_models_petab/__init__.py

@@ -6,5 +6,11 @@
 
 from .base import get_problem, get_problem_yaml_path
 from .C import MODEL_DIRS, MODELS, MODELS_DIR
-from .version import __version__
 from .overview import get_overview_df
+from importlib.metadata import PackageNotFoundError, version
+
+try:
+    __version__ = version("benchmark_models_petab")
+except PackageNotFoundError:
+    # package is not installed
+    pass

src/python/build.sh

@@ -36,6 +36,9 @@ cp -r "../../$DATA_DIR" $BUILD_DIR/$CODE_DIR
 # Hop into
 cd $BUILD_DIR
 
+# update git root in setuptools_scm configuration
+sed -ri 's/root = "..\/.."/root = "..\/..\/.."/' pyproject.toml
+
 # Build
 pip install --upgrade build
 python -m build --sdist

src/python/pyproject.toml

@@ -1,12 +1,7 @@
 [build-system]
-requires = [
-    "setuptools",
-    "wheel",
-    "petab",
-]
+requires = ["setuptools>=64", "setuptools-scm>=8"]
 build-backend = "setuptools.build_meta"
 
-
 [project]
 name = "benchmark_models_petab"
 description = "A collection of models with experimental data in the PEtab format"
@@ -33,17 +28,16 @@ dependencies = [
 [project.optional-dependencies]
 dev = ["ruff"]
 
-[tool.setuptools.dynamic]
-version = {attr = "benchmark_models_petab.__version__"}
-
 [project.scripts]
 bmp-petablint = "benchmark_models_petab.check_petablint:main"
 bmp-check-sbml-metadata = "benchmark_models_petab.check_sbml_metadata:main"
 bmp-create-overview = "benchmark_models_petab.overview:main"
 
+[tool.setuptools_scm]
+root = "../.."
+
 [tool.ruff]
 line-length = 79
 
-
 [tool.ruff.lint.per-file-ignores]
 "__init__.py" = ["F401"]