From 3c4ebd9b25f6556ee1952e0477e55e477fb17f9b Mon Sep 17 00:00:00 2001
From: Fabien Castan <fabcastan@gmail.com>
Date: Sun, 16 Jun 2024 21:29:23 +0200
Subject: [PATCH] [core] sort node types versions in file export

---
 meshroom/core/graph.py | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/meshroom/core/graph.py b/meshroom/core/graph.py
index bd4dc625..567fa249 100644
--- a/meshroom/core/graph.py
+++ b/meshroom/core/graph.py
@@ -1292,14 +1292,18 @@ class Graph(BaseObject):
         self.header[Graph.IO.Keys.ReleaseVersion] = meshroom.__version__
         self.header[Graph.IO.Keys.FileVersion] = Graph.IO.__version__
 
-        # store versions of node types present in the graph (excluding CompatibilityNode instances)
+        # Store versions of node types present in the graph (excluding CompatibilityNode instances)
+        # and remove duplicates
         usedNodeTypes = set([n.nodeDesc.__class__ for n in self._nodes if isinstance(n, Node)])
-
-        self.header[Graph.IO.Keys.NodesVersions] = {
+        # Convert to node types to "name: version"
+        nodesVersions = {
             "{}".format(p.__name__): meshroom.core.nodeVersion(p, "0.0")
             for p in usedNodeTypes
         }
-
+        # Sort them by name (to avoid random order changing from one save to another)
+        nodesVersions = dict(sorted(nodesVersions.items()))
+        # Add it the header
+        self.header[Graph.IO.Keys.NodesVersions] = nodesVersions
         self.header["template"] = template
 
         data = {}