Importing data from legacy system - need to generate conversions

[GreenImp]

I'm importing a load of files from a legacy system (Which isn't using Laravel or Media Library), and they are being inserted into the Laravel project's media DB table, in the correct formatting for this library.
However, the generated_conversions column is always an empty object.

I have ran the media-library:regenerate command, which correctly goes through and generates the conversions for me.
However, some files already have the conversions created, so I don't want to regenerate them (It's slow and more resource heavy). So I run it with --only-missing:

media-library:regenerate --only-missing

This correctly does not regenerate the images , that already exist. The problem is that the generated_conversions column is not updated either.

What I need to do, is to run through and generate all of the missing conversions, but also to update the generated_conversions column if the conversion isn't missing in the file system, but is missing from the DB entry.

Looking at the code, I can't see an easy way to do this, and it looks like I might have to loop through all the data myself, check if the file exists, and then run the Media model's markAsConversionGenerated() method:

laravel-medialibrary/src/MediaCollections/Models/Media.php

Lines 208 to 219 in 5d4930d

	public function markAsConversionGenerated(string $conversionName): self
	{
	$generatedConversions = $this->generated_conversions;
	Arr::set($generatedConversions, $conversionName, true);
	$this->generated_conversions = $generatedConversions;
	$this->save();
	return $this;
	}

But I think this might no really be faster than just regenerating the images, as I'd have to do it as a separate run, after running the media-library:regenerate command.

Does anyone know of a possible better way of doing this?