Add lzip support

[sorairolake]

Introduce the format you are requesting.

lzip is a compressed file format that using LZMA developed in 2008. The compression ratio is about the same as xz (which uses LZMA2). It mainly features a simpler file format and therefore easier error recovery. GMP also distributes this format of tarballs in addition to xz and zstd.¹

What do YOU use this format for?

Use cases of this format are similar to gzip and bzip2.

What is the format's conventional file extension(s)?

.lz

Please see https://datatracker.ietf.org/doc/html/draft-diaz-lzip-09#section-4.1.

Please link to the format's formal or official specification(s).

• https://www.nongnu.org/lzip/manual/lzip_manual.html#File-format
• https://datatracker.ietf.org/doc/html/draft-diaz-lzip-09#section-2

Which Go libraries could be used to implement this format?

• https://pkg.go.dev/github.com/sorairolake/lzip-go

Footnotes

1. https://gmplib.org/#DOWNLOAD ↩