bug#35880: [PATCH 1/7] lzlib: Add 'make-lzip-input-port/compressed'.

[Ludovic Courtès]

Hi!

Pierre Neidhardt <address@hidden> skribis:

> That said, if the encoder buffer is not empty, I think lz-compress-read
> should always return something >0.

Yes, probably.  The docstring for ‘lz-compress-read’ says:

    "Read up to COUNT bytes from the encoder stream, storing the results in 
LZFILE-BV.
  Return the number of uncompressed bytes written, a strictly positive integer."
                                                     ^~~~~~~~~~~~~~~~~

However, the lzlib manual doesn’t say that for ‘LZ_compress_read’ (info
"(lzlib) Compression functions").

But that’s OK: the ‘read!’ method in ‘make-lzip-input-port/compressed’
can just call ‘lzwrite!’ again with more data when that happens, so I’ve
done that.

And I pushed the whole thing! :-)

I think it’d be good to let people play with it in their personal
setups.

Next up: multi-compression support in ‘guix publish’ (possibly?) so we
can smoothly transition on our build farms.

Thanks!

Ludo’.