Use proper way to determine package version

docs/conf.py

@@ -14,33 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import codecs
-import os
-import re
-
-
-def read(*parts):
-    """
-    Build an absolute path from *parts* and and return the contents of the
-    resulting file.  Assume UTF-8 encoding.
-    """
-    here = os.path.abspath(os.path.dirname(__file__))
-    with codecs.open(os.path.join(here, *parts), "rb", "utf-8") as f:
-        return f.read()
-
-
-def find_version(*file_paths):
-    """
-    Build a path from *file_paths* and search for a ``__version__``
-    string inside.
-    """
-    version_file = read(*file_paths)
-    version_match = re.search(
-        r"^__version__ = ['\"]([^'\"]*)['\"]", version_file, re.M
-    )
-    if version_match:
-        return version_match.group(1)
-    raise RuntimeError("Unable to find version string.")
+from importlib import metadata
 
 
 # If extensions (or modules to document with autodoc) are in another directory,
@@ -88,11 +62,11 @@ def find_version(*file_paths):
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
-#
+
+# The full version, including alpha/beta/rc tags.
+release = metadata.version("prometheus-async")
 # The short X.Y version.
-release = find_version("..", "src", project.replace("-", "_"), "__init__.py")
 version = release.rsplit(".", 1)[0]
-# The full version, including alpha/beta/rc tags.
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -314,10 +288,13 @@ def find_version(*file_paths):
 # If true, do not generate a @detailmenu in the "Top" node's menu.
 # texinfo_no_detailmenu = False
 
-# GitHub has rate limits
 linkcheck_ignore = [
+    # Rate limits
     r"https://github.com/.*/(issues|pull)/\d+",
     r"https://twitter.com/.*",
+    # Anchors are a problem
+    r"https://github.com/prometheus/client_python#twisted",
+    r"https://github.com/prometheus/client_python#counter",
 ]