Add dynamic versioning to palace-util and palace-opds

Both packages now declare `dynamic = ["version"]` and source the
version from a committed `_version.py` stub via hatchling's regex
version source. The stub carries a dev placeholder (0.0.0.dev0) so
local / developer builds succeed out-of-box; the PyPI publish workflow
overwrites `_version.py` with the dunamai-computed release version
right before `uv build` to get the real version into the wheel
metadata.

`_version.py` also carries `__commit__` and `__branch__` (None on dev,
populated in CI) to match the shape of palace-manager's `_version.py`
— useful for `import palace.util; palace.util.__commit__` style
runtime lookup. Each package's `__init__.py` re-exports the three
attributes; since `_version.py` is committed, no try/except fallback
is needed (palace-manager keeps its try/except only because its
`_version.py` is generated at Docker build time and never committed).

palace-manager's own versioning is unchanged; it's not yet
PyPI-publishable for unrelated reasons.

Author: jonathangreen

packages/palace-opds/pyproject.toml

@@ -11,11 +11,11 @@ dependencies = [
     "uritemplate==4.2.0",
 ]
 description = "Pydantic models for OPDS 2.0, RWPM, ODL, LCP, and Palace Project extensions."
+dynamic = ["version"]
 license = "Apache-2.0"
 name = "palace-opds"
 readme = "README.md"
 requires-python = ">=3.12,<4"
-version = "0"
 
 [project.urls]
 Homepage = "https://thepalaceproject.org"
@@ -24,6 +24,11 @@ Repository = "https://github.com/ThePalaceProject/circulation"
 [tool.hatch.build.targets.wheel]
 packages = ["src/palace"]
 
+[tool.hatch.version]
+path = "src/palace/opds/_version.py"
+pattern = '__version__: str = "(?P<version>[^"]+)"'
+source = "regex"
+
 [tool.isort]
 combine_as_imports = true
 known_first_party = ["palace.opds"]

packages/palace-opds/src/palace/opds/__init__.py

@@ -0,0 +1,3 @@
+from palace.opds._version import __branch__, __commit__, __version__
+
+__all__ = ["__branch__", "__commit__", "__version__"]

packages/palace-opds/src/palace/opds/_version.py

@@ -0,0 +1,3 @@
+__version__: str = "0.0.0.dev0"
+__commit__: str | None = None
+__branch__: str | None = None

packages/palace-util/pyproject.toml

@@ -8,11 +8,11 @@ dependencies = [
     "python-dateutil>=2.8,<3",
 ]
 description = "Shared utilities for Palace Project packages."
+dynamic = ["version"]
 license = "Apache-2.0"
 name = "palace-util"
 readme = "README.md"
 requires-python = ">=3.12,<4"
-version = "0"
 
 [project.urls]
 Homepage = "https://thepalaceproject.org"
@@ -21,6 +21,11 @@ Repository = "https://github.com/ThePalaceProject/circulation"
 [tool.hatch.build.targets.wheel]
 packages = ["src/palace"]
 
+[tool.hatch.version]
+path = "src/palace/util/_version.py"
+pattern = '__version__: str = "(?P<version>[^"]+)"'
+source = "regex"
+
 [tool.isort]
 combine_as_imports = true
 known_first_party = ["palace.util"]

packages/palace-util/src/palace/util/__init__.py

@@ -0,0 +1,3 @@
+from palace.util._version import __branch__, __commit__, __version__
+
+__all__ = ["__branch__", "__commit__", "__version__"]

packages/palace-util/src/palace/util/_version.py

@@ -0,0 +1,3 @@
+__version__: str = "0.0.0.dev0"
+__commit__: str | None = None
+__branch__: str | None = None