docs: try using Furo

docs/conf.py

@@ -37,6 +37,7 @@
 # ones.
 extensions = [
     "breathe",
+    "sphinx_copybutton",
     "sphinxcontrib.rsvgconverter",
     "sphinxcontrib.moderncmakedomain",
 ]
@@ -127,23 +128,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 
-on_rtd = os.environ.get("READTHEDOCS", None) == "True"
-
-if not on_rtd:  # only import and set the theme if we're building docs locally
-    import sphinx_rtd_theme
-
-    html_theme = "sphinx_rtd_theme"
-    html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
-
-    html_context = {"css_files": ["_static/theme_overrides.css"]}
-else:
-    html_context = {
-        "css_files": [
-            "//media.readthedocs.org/css/sphinx_rtd_theme.css",
-            "//media.readthedocs.org/css/readthedocs-doc-embed.css",
-            "_static/theme_overrides.css",
-        ]
-    }
+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

docs/requirements.txt

@@ -1,5 +1,6 @@
 breathe==4.26.1
-sphinx==3.3.1
-sphinx_rtd_theme==0.5.0
-sphinxcontrib-moderncmakedomain==3.17
-sphinxcontrib-svg2pdfconverter==1.1.0
+furo
+sphinx==3.4.3
+sphinx-copybutton
+sphinxcontrib-moderncmakedomain==3.19
+sphinxcontrib-svg2pdfconverter==1.1.1

noxfile.py

@@ -53,14 +53,17 @@ def docs(session: nox.Session) -> None:
 
     session.install("-r", "docs/requirements.txt")
     session.chdir("docs")
-    session.run("sphinx-build", "-M", "html", ".", "_build")
-
-    if session.posargs:
-        if "serve" in session.posargs:
-            print("Launching docs at http://localhost:8000/ - use Ctrl-C to quit")
-            session.run("python", "-m", "http.server", "8000", "-d", "_build/html")
-        else:
-            print("Unsupported argument to docs")
+    if "pdf" in session.posargs:
+        session.run("sphinx-build", "-M", "latexpdf", ".", "_build")
+        return
+    else:
+        session.run("sphinx-build", "-M", "html", ".", "_build")
+
+    if "serve" in session.posargs:
+        print("Launching docs at http://localhost:8000/ - use Ctrl-C to quit")
+        session.run("python", "-m", "http.server", "8000", "-d", "_build/html")
+    elif session.posargs:
+        print("Unsupported argument to docs")
 
 
 @nox.session(reuse_venv=True)