Govern task context and advance execution pointer

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

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+import hashlib
+import json
+import os
+import pathlib
+import sys
+import tempfile
+
+import bpy
+
+
+def report():
+    source = bpy.data.objects.get("WebGapBooleanObject")
+    if source is None or source.type != "MESH":
+        raise RuntimeError("WebGapBooleanObject is missing")
+    modifiers = [modifier for modifier in source.modifiers if modifier.type == "BOOLEAN"]
+    if len(modifiers) != 1:
+        raise RuntimeError(f"expected exactly one BOOLEAN modifier, found {len(modifiers)}")
+    modifier = modifiers[0]
+    return {
+        "meshId": "mesh:" + source.data.name,
+        "modifier": {
+            "name": modifier.name,
+            "type": modifier.type,
+            "typeCode": bpy.types.Modifier.bl_rna.properties["type"].enum_items[modifier.type].value,
+            "operation": modifier.operation,
+            "solver": modifier.solver,
+            "targetObjectId": "object:" + modifier.object.name if modifier.object else None,
+            "showViewport": bool(modifier.show_viewport),
+            "showRender": bool(modifier.show_render),
+            "showEditMode": bool(modifier.show_in_editmode),
+            "showOnCage": bool(modifier.show_on_cage),
+        },
+    }
+
+
+def main():
+    arguments = sys.argv[sys.argv.index("--") + 1 :]
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b --python check-boolean-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-boolean-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"boolean modifier save/reopen drift: {before} != {after}")
+    value = {"schemaVersion": 1, "task": "M16-GAP-00033", "operation": "BOOLEAN_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"boolean-modifier-desktop-ok mesh={after['meshId']} operation={after['modifier']['operation']} saveReopen=exact")
+
+
+if __name__ == "__main__":
+    main()