Bug#1039907: apt-cacher-cleanup.pl clears/removes all cached packages on trixie

[gregor herrmann]

On Sun, 02 Jul 2023 15:40:45 +0100, Mark Hindley wrote:

> On Sun, Jul 02, 2023 at 03:37:29PM +0200, gregor herrmann wrote:
> > Random notes:
> > - IO::Uncompress::AnyUncompress is in both perl-modules-5.36 and
> >   libio-compress-perl.
> The system I reproduced on only has perl-modules-5.36 installed.

Ok.
 
> > - From a quick look at libio-compress-perl I don't see any recent
> >   relevant changes.
> > - I note that for de/compressing xz files libio-compress-lzma-perl is
> >   needed,
> Can you point me to the documentation for that, please? I have looked again and
> still can't find it!

TBH, I was grepping through the code and found various occasions
where IO::Compress::Adapter::Xz or IO::Uncompress::Adapter::UnXz and
IO::Compress::Xz or IO::Uncompress::UnXz are mentioned :)

lib/IO/Uncompress/AnyUncompress.pm (from libio-compress-perl in git,
2.204-1) has

    41	   eval ' use IO::Uncompress::Adapter::UnXz 2.204 ;';

    53	   eval ' use IO::Uncompress::UnXz 2.204 ;';

   140       if (defined $IO::Uncompress::UnXz::VERSION and

   145          my ($obj, $errstr, $errno) =
   146              IO::Uncompress::Adapter::UnXz::mkUncompObject();

The only thing which comes close to some documentation is

  1060	=head1 SEE ALSO
  1061	
  1062	L<Compress::Zlib>, L<IO::Compress::Gzip>, L<IO::Uncompress::Gunzip>, L<IO::Compress::Deflate>, L<IO::Uncompress::Inflate>, L<IO::Compress::RawDeflate>, L<IO::Uncompress::RawInflate>, L<IO::Compress::Bzip2>, L<IO::Uncompress::Bunzip2>, L<IO::Compress::Lzma>, L<IO::Uncompress::UnLzma>, L<IO::Compress::Xz>, L<IO::Uncompress::UnXz>, L<IO::Compress::Lzip>, L<IO::Uncompress::UnLzip>, L<IO::Compress::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, L<IO::Compress::Zstd>, L<IO::Uncompress::UnZstd>, L<IO::Uncompress::AnyInflate>


Some other grep results:

lib/IO/Compress/Zip.pm:To write Xz content, the module C<IO::Uncompress::UnXz> must

lib/IO/Uncompress/Unzip.pm:    eval{ require IO::Uncompress::Adapter::UnXz ;
lib/IO/Uncompress/Unzip.pm:          IO::Uncompress::Adapter::UnXz->import() } ;
lib/IO/Uncompress/Unzip.pm:            if ! defined $IO::Uncompress::Adapter::UnXz::VERSION ;
lib/IO/Uncompress/Unzip.pm:        my $obj = IO::Uncompress::Adapter::UnXz::mkUncompObject();
lib/IO/Uncompress/Unzip.pm:To read Xz content, the module C<IO::Uncompress::UnXz> must

So lib/IO/Compress/Zip.pm and lib/IO/Uncompress/Unzip.pm mention that IO::Uncompress::UnXz
is required (and the former should probably mention IO::Compress::Xz)
 
> >   which is only Suggested by libio-compress-perl (and
> >   Recommended by apt-cacher)
> Installing libio-compress-lzma-perl pulls in libio-compress-perl and normal
> apt-cacher decompression is restored.

Yay \o/
 
> I suppose the apt-cacher Recommends will need to become a Depends.

*nod*
 

Cheers,
gregor

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