Add support for Debian binary package (deb/ipk) about ouch HOT 6 OPEN

I was thinking more about the decompress command, not the compress because Debian has its own way to do so.

It would be just extending decompress functionality based on the file type. Something like this,

ouch decompress pkg.deb
Detecting Debian binary package
decompressing pkg.deb
decompressing control tarball
decompressing data tarball
...

And that's it. It would be easier doing like that because no need to take care of the compression.

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Thanks for the issue, glad to see you like Ouch :)

I can't think of any problems with supporting .deb.

Yeah it would be the first of the kind (binary file with specific files in), but I believe it wouldn't clash with our current usage.

If you can do:

ouch compress a b c d pkg.deb
# and
ouch decompress pkg.deb

With no required extra args, then it's OK for it to be supported :)

If we need other specific args, we'd need to create a new subcommand, like ouch bundle deb ..., and in that case, I'd start questioning if that's really easier/more intuitive than just using the usual tools.

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Makes sense! I never had to compress a .deb archive, but countless times I had to decompress it. It's certainly the most common use-case.

This would be the first format in Ouch that doesn't get compressed, similar to .rar if we end up adding it, @figsoda how do you feel about this one?

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I don't know the details of the deb format, but if it's like zip, I think we can support compression with a (arbitrary?) compression method that can be later extended to be customizable.

I actually opened an issue a while ago for the ar format and also lumped in deb: #201

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I think we can support compression with a (arbitrary?) compression method

We can choose a default compression method, the problem is providing more required fields that can't have a default and can't be omitted, I didn't even google it, but I'm assuming that's the case here, do you know @jetm?

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I wouldn't bother with the compression method, just the decompression. Like you said it, the most common case for Debian package is decompress.

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