bug#45676: Store references inside compressed data

[Tobias Geerinckx-Rice]

Hi!

Miguel Ángel Arruga Vivas wrote:
> These aren't taken into account by the grafting process, which 
> may lead
> to issues when store paths are located inside that kind of 
> files.

It's true.  It's a known trade-off of an otherwise 
almost-zero-effort yet fast reference scanner.  I don't think it's 
a bug per se, but it is something of which to be aware.  I also 
think this trade-off is worth it.

Luckily, this case is easier to fix than the infamous 
<http://issues.guix.gnu.org/24703>, because the right solution is 
simple:

>   - Compressed libraries: e.g. Smalltalk modules.
>   - Compressed executable or data files: e.g. library.el.gz.

Let's stop installing compressed executables & data files.  We 
already avoid compressed .jars and other renamed zip files.  It 
ain't right.

It's not 1998, my hard drive isn't 1.1GB, and I didn't just 
reinstall Slackware because I ‘accidentally’ gzexe'd gzip.

Gzipping a tiny handful of Lisp or Smalltalk files is pointless 
when zstd {,de}compresses my entire 500GB SSD better and faster, 
at the file system level where it now squarely belongs.  Without 
breaking Guix.

Kind regards,

T G-R

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