Re: [png-mng-implement] What about switching from .tar.lzma and .tar.bz2 to .txz?

[Bob F. <bfr...@si...>]

On Thu, 30 Jul 2009, Glenn Randers-Pehrson wrote:

> I'd like to consider switching from tar.bz2 and tar.lzma to .txz for the
> libpng distributions.  From the download stats at SourceForge,
> it looks as though we could drop tar.lzma immediately, but
> we'd need to phase in the switch from tar.bz2 to .txz
>
> I propose to switch the tar.lzma, right away, to .tgz, and
> on the libpng.html page, point to .tgz instead of .tar.bz2
> but leave the .tar.bz2 available for a while.  How long
> would depend on the download statistics.

I assume that you mean ".tar.xz" rather than ".tgz"?

For those who are not aware 'xz' is a new variant of lzma which 
incorporates a proper header and block CRCs.

> The tar.bz2 did not really take off until libpng.html pointed
> to it.  I suspect the same would happen with .txz

For GraphicsMagick I had been planning to dump tar.bz2 entirely but 
retained it after I discovered that 'rpmbuild' wanted it as input.  It 
was easier to simply continue distributing tar.bz2 than to figure out 
how to avoid it.

> Note that the author of lzma recommends the change.
> The underlying compression in .tgz is the same as in
> .tar.lzma, so it's got several years under its belt.

The compression is the same but the format is different and many 
distributions will not yet have the required lzma-utils to support it.

Bob
--
Bob Friesenhahn
bfr...@si..., http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/