reafactor: Configure for versioning

* Use bump-my-version (manage settings at pyproject.toml)
* Write package version into package-root (as dynamic)
* Ref version variable from sphinx-extension

pyproject.toml

@@ -1,6 +1,5 @@
 [project]
 name = "rst-multi-refs"
-version = "0.0.0"
 description = "reStrucuturedText's custom roles and role builder kit for package registries of any languages."
 authors = [
     { name = "Kazuya Takei", email = "[email protected]" }
@@ -29,6 +28,7 @@ classifiers = [
     "Topic :: Software Development :: Documentation",
     "Topic :: Text Processing :: Markup :: reStructuredText",
 ]
+dynamic = ["version"]
 
 [project.optional-dependencies]
 sphinx = [
@@ -59,8 +59,27 @@ select = ["C90", "D", "E", "F", "I", "W"]
 [tool.ruff.lint.pydocstyle]
 convention = "pep257"
 
+[tool.bumpversion]
+current_version = "0.0.0"
+commit = true
+tag = false
+message = "release: Bump version {current_version} -> {new_version}"
+
+[[tool.bumpversion.files]]
+filename = "pyproject.toml"
+search = "version = \"{current_version}\""
+replace = "version = \"{new_version}\""
+
+[[tool.bumpversion.files]]
+filename = "src/rst_multi_refs/__init__.py"
+search = "__version__ = \"{current_version}\""
+replace = "__version__ = \"{new_version}\""
+
 [tool.hatch.metadata]
 allow-direct-references = true
 
 [tool.hatch.build.targets.wheel]
 packages = ["src/rst_multi_refs"]
+
+[tool.hatch.version]
+path = "src/rst_multi_refs/__init__.py"

src/rst_multi_refs/__init__.py

@@ -1 +1,2 @@
-"""Root of package."""
+"""Root of rst-multi-refs."""
+__version__ = "0.0.0"

src/rst_multi_refs/sphinx.py

@@ -2,6 +2,7 @@
 from sphinx.application import Sphinx
 from sphinx.config import Config
 
+from . import __version__
 from .core import configure
 
 
@@ -14,7 +15,7 @@ def setup(app: Sphinx):
     """Entrypoint as Sphinx extension."""
     app.connect("config-inited", register_roles)
     return {
-        "version": "0.0.0",
+        "version": __version__,
         "env_version": 1,
         "parallel_read_safe": False,
     }