docs: update sphinx config

... to dynamically extract version and other metadata from importlib

It also fixes an apparent issue with the intersphinx configuration
format that must have changed some time down the line

docs/source/conf.py

@@ -2,6 +2,8 @@
 # alot documentation build configuration file
 import sys
 import os
+from importlib.metadata import version as get_version
+from importlib.metadata import metadata
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -48,16 +50,18 @@
 
 # General information about the project.
 project = 'alot'
-copyright = alot.__copyright__
+
+# still used?
+# copyright = alot.__copyright__
 
 # 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 short X.Y version.
-version = alot.__version__
 # The full version, including alpha/beta/rc tags.
-release = alot.__version__
+release: str = get_version("alot")
+# The short X.Y version.
+# for example take major/minor
+version: str = ".".join(release.split('.')[:2])
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -186,8 +190,8 @@
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual])
 latex_documents = [
-  ('index', 'alot.tex', 'alot Documentation',
-   'Patrick Totzke', 'manual'),
+    ('index', 'alot.tex', 'alot Documentation',
+     'Patrick Totzke', 'manual'),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -219,15 +223,15 @@
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
+alot_meta = metadata('alot')
 man_pages = [
-    ('manpage', 'alot', alot.__description__,
-     [alot.__author__], 1),
+    ('manpage', 'alot', alot_meta['Summary'], [alot_meta['Author']], 1),
 ]
 
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    'http://docs.python.org/': None,
-    'http://notmuch.readthedocs.org/en/latest/': None,
-    'http://urwid.readthedocs.org/en/latest/': None
+    'python': ('http://docs.python.org/', None),
+    'notmuch': ('http://notmuch.readthedocs.org/en/latest/', None),
+    'urwid': ('http://urwid.readthedocs.org/en/latest/', None)
 }