feat(conf.py): Implement dynamic version retrieval for RST substitution

Author: pchaumeil

docs/src/conf.py

@@ -4,7 +4,7 @@
 import re
 
 sys.path.insert(0, os.path.abspath('../..'))
-from gtdbtk import __author__, __version__, __title__, __maintainer__, __url__
+from gtdbtk import __author__, __title__, __maintainer__, __url__
 
 # Configuration file for the Sphinx documentation builder.
 # https://www.sphinx-doc.org/en/master/usage/configuration.html
@@ -15,15 +15,27 @@
 copyright = f'{datetime.now().year}, {__maintainer__}'
 author = __author__
 
-# The full version, including alpha/beta/rc tags
-release = __version__
-version = __version__
-
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'
 
 github_url = __url__
 
+def get_version():
+    with open(os.path.abspath('../../gtdbtk/__init__.py')) as f:
+        for line in f:
+            if line.startswith('__version__'):
+                return re.search(r'["\'](.+?)["\']', line).group(1)
+    return 'unknown'
+
+release = get_version()
+version = '.'.join(release.split('.')[:2])
+
+# Make version info available for substitution in RST files
+rst_epilog = f"""
+.. |release| replace:: {release}
+.. |version| replace:: {version}
+"""
+
 # -- General configuration ---------------------------------------------------
 
 # Add any Sphinx extension module names here, as strings. They can be