From efd148fe01ae6e655189e01d19a09686e9a2360d Mon Sep 17 00:00:00 2001
From: Bradley Sappington <bsappington@stsci.edu>
Date: Fri, 24 May 2024 12:25:45 -0400
Subject: [PATCH] setting up graphviz for our readthedocs builds

---
 docs/conf.py    | 3 ++-
 readthedocs.yml | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/conf.py b/docs/conf.py
index 69e864ea..76a4ed1d 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -70,6 +70,7 @@
 extensions = [
     "sphinx.ext.mathjax",
     "sphinx.ext.autodoc",
+    "sphinx.ext.graphviz",
     "sphinx.ext.intersphinx",
     "sphinx.ext.todo",
     "sphinx.ext.inheritance_diagram",
@@ -85,7 +86,7 @@
 numpydoc_show_class_members = False
 
 autosummary_generate = True
-
+graphviz_dot = "dot"
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]
 
diff --git a/readthedocs.yml b/readthedocs.yml
index 6ce39637..e951b63b 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -10,6 +10,8 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3.10"
+  apt_packages:
+    - graphviz
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx: