Add (now mandatory) `.readthedocs.yaml` file, add docs `requirements.txt` and update sphinx conf (#684)

.readthedocs.yaml

@@ -0,0 +1,16 @@
+# Read the Docs configuration file for Sphinx projects
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3"
+
+python:
+  install:
+    - requirements: docs/requirements.txt
+
+sphinx:
+  configuration: docs/source/conf.py

docs/requirements.txt

@@ -0,0 +1,2 @@
+Sphinx~=7.2.6
+furo==2023.9.10

docs/source/conf.py

@@ -11,7 +11,9 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys, os
+import datetime
+import os
+import re
 
 # 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
@@ -40,17 +42,34 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'Pyjnius'
-copyright = u'2017, Kivy Team and other contributors'
+project = 'pyjnius'
+
+_today = datetime.datetime.now()
+
+copyright = f'{_today.year}, Kivy Team and other contributors'
 
 # 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.
 #
+
+# Lookup the version from the pyjnius module, without installing it
+# since readthedocs.org may have issue to install it.
+# Read the version from the __init__.py file, without importing it.
+def get_version():
+    with open(
+        os.path.join(os.path.abspath("../.."), "jnius", "__init__.py")
+    ) as fp:
+        for line in fp:
+            m = re.search(r'^\s*__version__\s*=\s*([\'"])([^\'"]+)\1\s*$', line)
+            if m:
+                return m.group(2)
+
+
 # The short X.Y version.
-version = '1.0'
+version = get_version()
 # The full version, including alpha/beta/rc tags.
-release = '1.0a1'
+release = get_version()
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -91,7 +110,7 @@ pygments_style = 'sphinx'
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+html_theme = 'furo'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the