Govern task context and advance execution pointer

tools/web/check-speaker-desktop.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+import hashlib
+import json
+import os
+import pathlib
+import sys
+import tempfile
+
+import bpy
+
+
+def report():
+    speaker = bpy.data.speakers.get("WebGapSpeaker")
+    if speaker is None:
+        raise RuntimeError("WebGapSpeaker is missing")
+    return {
+        "id": "speaker:" + speaker.name,
+        "name": speaker.name,
+        "soundId": "sound:" + speaker.sound.name if speaker.sound else None,
+        "volumeMax": float(speaker.volume_max),
+        "volumeMin": float(speaker.volume_min),
+        "distanceMax": float(speaker.distance_max),
+        "distanceReference": float(speaker.distance_reference),
+        "attenuation": float(speaker.attenuation),
+        "coneAngleOuter": float(speaker.cone_angle_outer),
+        "coneAngleInner": float(speaker.cone_angle_inner),
+        "coneVolumeOuter": float(speaker.cone_volume_outer),
+        "volume": float(speaker.volume),
+        "pitch": float(speaker.pitch),
+    }
+
+
+def main():
+    arguments = sys.argv[sys.argv.index("--") + 1 :]
+    if len(arguments) != 2:
+        raise SystemExit("usage: blender -b --python check-speaker-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-speaker-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"speaker save/reopen drift: {before} != {after}")
+    value = {"schemaVersion": 1, "task": "M16-GAP-00023", "operation": "SPEAKER_DATABLOCK_DESKTOP", "fixture": str(fixture), "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(), "speaker": 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"speaker-desktop-ok id={after['id']} volume={after['volume']} saveReopen=exact")
+
+
+if __name__ == "__main__":
+    main()