Re: [Monotone-devel] zlib vs gzip

[Nathaniel Smith]

On Fri, Oct 26, 2007 at 09:28:34PM +0200, Markus Schiltknecht wrote:
> Hi,
> 
> Markus Schiltknecht wrote:
> >Aha.. yeah, that would explain the incompatibility between the two. 
> >Thanks for the hint.
> 
> Okay, in the meantime, I figured that gzip and zlib really are two 
> different encapsulation formats (for the same type of compression 
> algorithm, though). Matt's [1] mail explains that quite well.
> 
> Looks like zlib (> 1.2) supports both, but botan only supports zlib 
> style headers and footers. We could (and probably should) use zlib only, 
> instead of gzip, but that would cost a netsync flag day.

Or maybe we could flutter our eyelashes at Jack Lloyd and get gzip
support upstream into Botan, like I guess we should have a while ago
just this doesn't come up very often?

Jack?

> >I'd still like it best, if we could get rid of gzip.cpp, to get closer 
> >to compatibility with the default botan distribution. Otherwise 
> >maintenance work will grow infinitely.
> 
> Well. As I've cold-heartedly deleted the gzip files Matt created from 
> the n.v.m.botan branch, I fear I've killed history for those files.
> 
> I've now readded those files in the monotone main directory, because I'm 
> under the impression that it's "our" code, which we have to maintain. 
> Even if it's botan derived, I don't think that code belongs to the botan 
> directory. And having it there will prevent similar mistakes like mine 
> this morning. Sorry for the trouble.
> 
> For some reason the update to botan 1.7.2 caused a unit test to fail 
> (transform_corruption_check). That was the main reason for me to look 
> into that whole issue at all. Anyway, I've now fixed that in the newly 
> added gzip.cc, so we are at botan 1.7.2, and at least on my box, all 
> tests are fine.
> 
> Regards
> 
> Markus
> 
> [1]: Matt: comments on .sqlite3.binary branch
> http://thread.gmane.org/gmane.comp.version-control.monotone.devel/5755/focus=5783
> 
> 
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-- Nathaniel

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