doc: Add readthedocs config

.readthedocs.yml

@@ -0,0 +1,20 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+   configuration: doc/source/conf.py
+
+# Optionally build your docs in additional formats such as PDF
+formats:
+   - pdf
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+   version: 3.8
+   install:
+   - requirements: doc/requirements.txt

doc/requirements.txt

@@ -0,0 +1,4 @@
+breathe
+sphinx_rtd_theme
+semver
+sphinxcontrib-plantuml

doc/source/conf.py

@@ -34,11 +34,8 @@
 
 
 # -- General configuration ---------------------------------------------------
-
-read_the_docs_build = os.environ.get('READTHEDOCS', None) == 'True'
-
-#if read_the_docs_build:
-subprocess.call('doxygen ../doxygen.cfg', shell=True)
+subprocess.call('set', shell=True)
+subprocess.call('doxygen doxygen.cfg', shell=True)
 
 # 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