AutoGrouper is broken for JPEG/RAW pairs

In darktable I import both JPEG and RAW into the library. (It is sometimes convenient to compare JPEGs and RAW developments that way.)

Now when I apply Auto group to a selection, the following happens:

• For the first pair of images of a group, both JPEG and RAW are included, with the first RAW being the group leader. This is expected and what I hoped would happen.
• For the following images, up to the gap in time signalling the end of the group:
  • The RAW images get added to the group
  • The JPEG images do not get added and remain group-less.

I would like to have all JPEGs and RAWs added to the group.

If I have time I might look into this myself, but that is not likely in the next few weeks. We'll see.

If you need them I can provide a sample burst of images or two.

まず、JPEG/RAW ペアを含む選択範囲で Auto group を再現し、その後、lua-scripts リポジトリ内で Auto group のエントリーポイントを特定します。最初のペアと後続の画像がどのように処理されるかを比較します。完了の条件は、時間で区切られたグループ内のすべての JPEG と RAW が含まれることです。