Drop setuptools-scm, use uv version + uv build for PyPI publishing

setuptools-scm PRETEND_VERSION env var does not propagate through
build isolation. Use uv version to write the tag version directly
into pyproject.toml before uv build. Read version at runtime via
importlib.metadata.

Author: purohit10saurabh

.github/workflows/publish.yml

@@ -15,19 +15,14 @@ jobs:
       id-token: write
     steps:
       - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
 
       - uses: astral-sh/setup-uv@v4
 
       - name: Set version from tag
-        run: echo "SETUPTOOLS_SCM_PRETEND_VERSION=${GITHUB_REF_NAME#v}" >> "$GITHUB_ENV"
-
-      - name: Install dependencies
-        run: uv sync
+        run: uv version "${GITHUB_REF_NAME#v}"
 
       - name: Build package
-        run: uv run python -m build
+        run: uv build
 
       - name: Publish to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1

.gitignore

@@ -12,9 +12,6 @@ dist/
 models/*
 .pytest_cache/
 
-# auto-generated version file
-mamba_ssm/_version.py
-
 # uv package manager
 .venv/
 .uv/

mamba_ssm/__init__.py

@@ -1,6 +1,8 @@
+from importlib.metadata import PackageNotFoundError, version
+
 try:
-    from mamba_ssm._version import version as __version__
-except ImportError:
+    __version__ = version("mamba-ssm-macos")
+except PackageNotFoundError:
     __version__ = "0.0.0"
 
 import platform

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=61", "wheel", "setuptools-scm>=8"]
+requires = ["setuptools>=61", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [tool.uv]
@@ -59,9 +59,6 @@ dev = [
     "build>=1.4.0",
 ]
 
-[tool.setuptools_scm]
-version_file = "mamba_ssm/_version.py"
-
 [tool.setuptools]
 packages = [
   "mamba_ssm",