tar-split/tar/asm

asm

This library for assembly and disassembly of tar archives, facilitated by github.com/vbatts/tar-split/tar/storage.

Concerns

For completely safe assembly/disassembly, there will need to be a Content Addressable Storage (CAS) directory, that maps to a checksum in the storage.Entity of storage.FileType.

This is due to the fact that tar archives can allow multiple records for the same path, but the last one effectively wins. Even if the prior records had a different payload.

In this way, when assembling an archive from relative paths, if the archive has multiple entries for the same path, then all payloads read in from a relative path would be identical.

Thoughts

While the initial implementation is based on a relative path, I'm thinking the next step is to have something like a FileGetter interface, of which a path based getter is just one type.

Then you could pass a path based Getter and an Unpacker, and receive a io.Reader that is your tar stream.