bug#69004: Cannot open lzip-compressed info manuals

[Eli Zaretskii]

> Cc: 69004@debbugs.gnu.org
> Date: Fri, 09 Feb 2024 20:55:54 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > From: Francesco Turco <fturco@posteo.net>
> > Date: Fri, 09 Feb 2024 16:49:59 +0000
> > 
> > I'm using GNU Emacs 29.2 on a Gentoo Linux system.
> > 
> > On this system, all info manuals are compressed with lzip and have a .lz
> > suffix.
> 
> Emacs doesn't (yet) support Info manuals compressed with lzip.
> 
> > When running M-x info and opening any info manual (e.g. the info manual
> > for bash), I get error messages similar to the following one:
> > 
> > > Info file `bash' does not exist; consider installing it
> > 
> > In reality the info manual for bash is available on my system:
> > 
> > $ file /usr/share/info/bash.info.lz 
> > /usr/share/info/bash.info.lz: lzip compressed data, version: 1
> > 
> > In info.el source code there is no instance of either "lzip" or "lz".
> > In particular, there is no lzip-related entry in the Info-suffix-list
> > variable definition.
> > 
> > In my opinion it would be nice to add support for lzip-compressed info
> > manuals to M-x info.
> 
> Patches welcome to add lzip support to info.el.

I have now added that on master; closing.