Capture M16 gap execution artifacts

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

@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+import hashlib
+import json
+import os
+import pathlib
+import sys
+import tempfile
+
+import bpy
+
+
+def nla_report():
+    obj = bpy.data.objects.get("WebGapStashObject")
+    if obj is None or obj.animation_data is None:
+        raise RuntimeError("WebGapStashObject animation data is missing")
+    tracks = []
+    for track in obj.animation_data.nla_tracks:
+        tracks.append({
+            "name": track.name,
+            "strips": [{
+                "name": strip.name,
+                "action": strip.action.name if strip.action else None,
+                "frameStart": round(float(strip.frame_start), 6),
+                "frameEnd": round(float(strip.frame_end), 6),
+            } for strip in track.strips],
+        })
+    return {"activeAction": obj.animation_data.action.name if obj.animation_data.action else None, "tracks": tracks}
+
+
+def main():
+    arguments = sys.argv[sys.argv.index("--") + 1:]
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b --python check-action-stash-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 = nla_report()
+    if before["activeAction"] is not None or len(before["tracks"]) != 1 or len(before["tracks"][0]["strips"]) != 1:
+        raise RuntimeError(f"unexpected action.stash result: {before}")
+    descriptor, temporary = tempfile.mkstemp(prefix="m16-action-stash-reopen-", suffix=".blend")
+    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 = nla_report()
+    finally:
+        pathlib.Path(temporary).unlink(missing_ok=True)
+    if before != after:
+        raise RuntimeError(f"action.stash save/reopen drift: {before} != {after}")
+    report = {
+        "schemaVersion": 1,
+        "task": "M16-GAP-00144",
+        "operation": "ACTION_STASH_DESKTOP",
+        "fixture": str(fixture),
+        "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(),
+        "nla": after,
+        "saveReopen": "EXACT",
+        "blenderVersion": bpy.app.version_string,
+    }
+    output.parent.mkdir(parents=True, exist_ok=True)
+    output.write_text(json.dumps(report, indent=2, sort_keys=True) + "\n", encoding="utf-8")
+    print("action-stash-desktop-ok tracks=1 strips=1 activeAction=none saveReopen=exact")
+
+
+if __name__ == "__main__":
+    main()