Unpack rar files split over multiple files

[lindell]

What would you like to have changed?

Enable unpacking of rar archives split over multiple files

Why is this feature a useful, necessary, and/or important addition to this project?

It is common for RAR archives to be split over multiple files

file.r00
file.r01
file.rar

Trying to take the reader of the .rar files results in: rardecode: filename required for multi volume archive. Which is to be expected since you don't provide any filesystem info like the filename or path.

What alternatives are there, or what are you doing in the meantime to work around the lack of this feature?

Will try to use rardecode directly.

[mholt]

Huh, I'm not familiar with this functionality/feature. Do you have a clue as to how we'd implement (use rardecode to do) that?

[davidnewhall]

If you share reproducible code it'll make finding the problem easier. This should just work.

[darkliquid]

According to the rardecode source, the documentation for NewReader says that you must instead use OpenReader to handle multi-volume archives.

Obviously this only applies when opening a file, not handling a stream of rar data. I'm not sure how a multi-volume rar stream would make sense, though I suppose one could pass in multiple streams by building an fs.FS that serves each volume stream reader as a "file" with a calculated file name, and passing that filesystem in as one of the options to OpenReader