Continue Blender Web parity task handoff

tools/web/check-action-replace-action-desktop.py

@@ -0,0 +1,120 @@
+#!/usr/bin/env python3
+import hashlib
+import json
+import os
+import pathlib
+import sys
+import tempfile
+
+import bpy
+
+
+OBJECTS = ("WebGapAnimReplaceOldA", "WebGapAnimReplaceOldB", "WebGapAnimReplaceNewUser")
+OLD_ACTION = "WebGapAnimReplaceOldAction"
+NEW_ACTION = "WebGapAnimReplaceNewAction"
+
+
+def action_report(obj):
+    action = obj.animation_data.action if obj and obj.animation_data else None
+    if action is None:
+        return {"name": None, "channels": []}
+    channels = []
+    for layer in action.layers:
+        for strip in layer.strips:
+            for bag in strip.channelbags:
+                for curve in bag.fcurves:
+                    channels.append(
+                        {
+                            "path": curve.data_path,
+                            "index": curve.array_index,
+                            "frames": [round(float(key.co.x), 6) for key in curve.keyframe_points],
+                            "values": [round(float(key.co.y), 6) for key in curve.keyframe_points],
+                        }
+                    )
+    channels.sort(key=lambda value: (value["path"], value["index"]))
+    return {"name": action.name, "channels": channels}
+
+
+def state_report():
+    objects = {name: bpy.data.objects.get(name) for name in OBJECTS}
+    if any(obj is None for obj in objects.values()):
+        raise RuntimeError("replace_action fixture objects are missing")
+    return {
+        "activeObject": bpy.context.view_layer.objects.active.name if bpy.context.view_layer.objects.active else None,
+        "objects": {name: action_report(obj) for name, obj in objects.items()},
+        "actions": {name: int(bpy.data.actions[name].users) for name in (OLD_ACTION, NEW_ACTION)},
+    }
+
+
+def is_replaced(state):
+    return all(value["name"] == NEW_ACTION for value in state["objects"].values())
+
+
+def main():
+    arguments = sys.argv[sys.argv.index("--") + 1 :]
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b --factory-startup --python check-action-replace-action-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 = state_report()
+    preserved = is_replaced(before)
+    if not preserved:
+        if before["activeObject"] != "WebGapAnimReplaceOldA":
+            raise RuntimeError(f"replace_action active object is wrong: {before}")
+        if before["objects"]["WebGapAnimReplaceOldA"]["name"] != OLD_ACTION or before["objects"]["WebGapAnimReplaceOldB"]["name"] != OLD_ACTION:
+            raise RuntimeError(f"replace_action source actions are wrong: {before}")
+    old_action = bpy.data.actions.get(OLD_ACTION)
+    new_action = bpy.data.actions.get(NEW_ACTION)
+    if old_action is None or new_action is None:
+        raise RuntimeError("replace_action actions are missing")
+    poll = bool(bpy.ops.anim.replace_action.poll())
+    if not poll:
+        raise RuntimeError("ANIM_OT_replace_action poll failed")
+    result = bpy.ops.anim.replace_action(old_session_uid=old_action.session_uid, new_session_uid=new_action.session_uid)
+    if result != {"FINISHED"}:
+        raise RuntimeError(f"ANIM_OT_replace_action returned {result}")
+    after = state_report()
+    if not is_replaced(after):
+        raise RuntimeError(f"replace_action did not replace all users: {after}")
+
+    descriptor, temporary = tempfile.mkstemp(prefix="m16-anim-replace-action-reopen-", suffix=".blend")
+    os.close(descriptor)
+    temporary_path = pathlib.Path(temporary)
+    try:
+        bpy.ops.wm.save_as_mainfile(filepath=str(temporary_path), check_existing=False, compress=True)
+        bpy.ops.wm.open_mainfile(filepath=str(temporary_path), load_ui=False)
+        reopened = state_report()
+        if reopened != after:
+            raise RuntimeError(f"anim.replace_action save/reopen drift: {after} != {reopened}")
+        if not preserved:
+            bpy.ops.wm.save_as_mainfile(filepath=str(fixture), check_existing=False, compress=True)
+        report = {
+            "schemaVersion": 1,
+            "task": "M16-GAP-00202",
+            "operation": "ANIM_REPLACE_ACTION_DESKTOP",
+            "fixture": str(fixture),
+            "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(),
+            "before": before,
+            "after": reopened,
+            "poll": poll,
+            "operatorStatus": "FINISHED",
+            "mainMutation": "ACTIONS_REPLACED" if not preserved else "NONE_ALREADY_REPLACED",
+            "saveReopen": "EXACT",
+            "blenderVersion": bpy.app.version_string,
+        }
+        if preserved:
+            report["evidenceStatus"] = "PRESERVED"
+        if not preserved or not output.exists():
+            output.parent.mkdir(parents=True, exist_ok=True)
+            output.write_text(json.dumps(report, indent=2, sort_keys=True) + "\n", encoding="utf-8")
+        print("anim-replace-action-desktop-ok poll=true status=FINISHED mainMutation=actions_replaced saveReopen=exact")
+    finally:
+        temporary_path.unlink(missing_ok=True)
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except Exception as error:
+        print(f"anim-replace-action-desktop-failed: {error}")
+        raise SystemExit(1)