Govern task context and advance execution pointer

tools/web/check-armature-modifier-desktop.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+import hashlib
+import json
+import os
+import pathlib
+import sys
+import tempfile
+
+import bpy
+
+
+def report():
+    mesh_object = bpy.data.objects.get("WebGapArmatureMeshObject")
+    armature_object = bpy.data.objects.get("WebGapArmatureObject")
+    if mesh_object is None or mesh_object.type != "MESH":
+        raise RuntimeError("WebGapArmatureMeshObject is missing")
+    if armature_object is None or armature_object.type != "ARMATURE":
+        raise RuntimeError("WebGapArmatureObject is missing")
+    modifiers = [modifier for modifier in mesh_object.modifiers if modifier.type == "ARMATURE"]
+    if len(modifiers) != 1:
+        raise RuntimeError(f"expected exactly one ARMATURE modifier, found {len(modifiers)}")
+    modifier = modifiers[0]
+    type_code = bpy.types.Modifier.bl_rna.properties["type"].enum_items[modifier.type].value
+    return {
+        "meshId": "mesh:" + mesh_object.data.name,
+        "meshName": mesh_object.data.name,
+        "armatureObjectId": "object:" + armature_object.name,
+        "armatureDataId": "armature:" + armature_object.data.name,
+        "modifier": {
+            "name": modifier.name,
+            "type": modifier.type,
+            "typeCode": type_code,
+            "enabled": bool(modifier.show_viewport),
+            "showViewport": bool(modifier.show_viewport),
+            "showRender": bool(modifier.show_render),
+            "showEditMode": bool(modifier.show_in_editmode),
+            "showOnCage": bool(modifier.show_on_cage),
+            "vertexGroup": modifier.vertex_group,
+            "targetObjectId": "object:" + modifier.object.name if modifier.object else None,
+        },
+    }
+
+
+def main():
+    arguments = sys.argv[sys.argv.index("--") + 1 :]
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b --python check-armature-modifier-desktop.py -- FIXTURE REPORT")
+    fixture, output = (pathlib.Path(value).resolve() for value in arguments)
+    bpy.ops.wm.open_mainfile(filepath=str(fixture), load_ui=False)
+    before = report()
+    descriptor, temporary = tempfile.mkstemp(prefix="m16-armature-modifier-reopen-", suffix=".blend", dir=fixture.parent)
+    os.close(descriptor)
+    try:
+        bpy.ops.wm.save_as_mainfile(filepath=temporary, check_existing=False, compress=True)
+        bpy.ops.wm.open_mainfile(filepath=temporary, load_ui=False)
+        after = report()
+    finally:
+        pathlib.Path(temporary).unlink(missing_ok=True)
+    if before != after:
+        raise RuntimeError(f"armature modifier save/reopen drift: {before} != {after}")
+    value = {
+        "schemaVersion": 1,
+        "task": "M16-GAP-00030",
+        "operation": "ARMATURE_MODIFIER_DESKTOP",
+        "fixture": str(fixture),
+        "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(),
+        "modifier": after,
+        "saveReopen": "EXACT",
+        "blenderVersion": bpy.app.version_string,
+    }
+    output.parent.mkdir(parents=True, exist_ok=True)
+    output.write_text(json.dumps(value, indent=2, sort_keys=True) + "\n", encoding="utf-8")
+    print(f"armature-modifier-desktop-ok mesh={after['meshId']} modifier={after['modifier']['name']} saveReopen=exact")
+
+
+if __name__ == "__main__":
+    main()