Bulk load messages with images

Troubleshooting Command Line Interface
1

Greetings,

I am attempting to write a script to create a bulk import file from messages exported from Element and include images (and other media files). In the Element export it looks like posts with images are treated as a message by themselves, while in the Mattermost bulk import format they are “attachments”. Bulk loading data — Mattermost documentation seems to indicate that the path to the images should be on the local filesystem, but the bulk upload is in a zipfile, so I was assuming that it would be a relative path to the images inside the zip. An example JSONL entry out of my import file looks like the following (lines broken for readability) with the images in a directory in the zipfile called ima.

{"post":
   {"attachments":[{"path":"ima/ima_04ea3d5.jpeg"}],
    "channel":"techwizardtest",
    "create_at":1678742223264,
    "message":"ima_04ea3d5.jpeg",
    "props":{
      "attachments":[{"text":"image ima_04ea3d5.jpeg"}]
    },
    "team":"ncbt",
    "user":"josiah"},
 "type":"post"}

So this isn’t quite working–I get all the messages fine, but none of the images appear. I must be missing something with respect to actually getting the media files into Mattermost because when browsing my S3 bucket I don’t see any of the images that should be there.

How can I get the images onto the Mattermost installation and how do I need to reference them in the import file?

Thanks!