Advance M8-M11 parity workflows

tools/web/generate-curve-toggle-golden.py

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+import hashlib
+import json
+import os
+import sys
+import tempfile
+
+import bpy
+
+
+def main():
+    arguments = sys.argv[sys.argv.index("--") + 1 :] if "--" in sys.argv else []
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b fixture.blend --python generate-curve-toggle-golden.py -- fixture.blend output.json")
+    fixture = os.path.abspath(arguments[0])
+    output = os.path.abspath(arguments[1])
+    curve = bpy.data.curves.get("WebCurveData")
+    if curve is None or len(curve.splines) < 1:
+        raise RuntimeError("WebCurveData fixture is missing its first spline")
+    before = [spline.use_cyclic_u for spline in curve.splines]
+    spline_types = [spline.type for spline in curve.splines]
+    spline_point_counts = [len(spline.bezier_points) if spline.type == "BEZIER" else len(spline.points) for spline in curve.splines]
+    curve.splines[0].use_cyclic_u = not curve.splines[0].use_cyclic_u
+    after = [spline.use_cyclic_u for spline in curve.splines]
+    with tempfile.TemporaryDirectory(prefix="m9-05-curve-toggle-") as temporary:
+        saved = os.path.join(temporary, "curve-toggle.blend")
+        bpy.ops.wm.save_as_mainfile(filepath=saved, check_existing=False)
+        bpy.ops.wm.open_mainfile(filepath=saved)
+        reopened = [spline.use_cyclic_u for spline in bpy.data.curves["WebCurveData"].splines]
+    with open(fixture, "rb") as source:
+        fixture_sha256 = hashlib.sha256(source.read()).hexdigest()
+    payload = {
+        "schemaVersion": 1,
+        "operator": "TOGGLE_CYCLIC",
+        "fixture": "tests/files/web/nonmesh_scene.blend",
+        "fixtureSha256": fixture_sha256,
+        "blenderVersion": ".".join(str(value) for value in bpy.app.version),
+        "curveName": "WebCurveData",
+        "splineIndex": 0,
+        "splineTypes": spline_types,
+        "splinePointCounts": spline_point_counts,
+        "beforeCyclicU": before,
+        "afterCyclicU": after,
+        "reopenedCyclicU": reopened,
+    }
+    with open(output, "w", encoding="utf-8") as destination:
+        json.dump(payload, destination, indent=2, sort_keys=True)
+        destination.write("\n")
+
+
+if __name__ == "__main__":
+    main()