Very cool, I wish there were something similar to this for filesystem images though.
Just recently I needed to somehow generate a .tar.gz from a .raw ext4 image and, surprisingly, there's still no better option than actually mounting it and then creating an archive.
I managed to "isolate" it a bit with guestfish's tar-out, but still it's pretty slow as it needs to seek around the image (in my case over NBD) to get the actual files.
Just recently I needed to somehow generate a .tar.gz from a .raw ext4 image and, surprisingly, there's still no better option than actually mounting it and then creating an archive.
I managed to "isolate" it a bit with guestfish's tar-out, but still it's pretty slow as it needs to seek around the image (in my case over NBD) to get the actual files.