[OE-core] [PATCH] base bbclass: add support for tar.lz

[Richard Purdie]

On Tue, 2014-10-28 at 10:36 +0100, Koen Kooi wrote:
> > Op 27 okt. 2014, om 14:15 heeft Burton, Ross <ross.burton at intel.com> het volgende geschreven:
> > 
> > 
> > On 27 October 2014 13:06, Koen Kooi <koen at dominion.thruhere.net> wrote:
> > Ah, two different problems :/
> > 
> > The problem that lzip-native isn't in oe-core is only a problem when there's a .lz SRC_URI in oe-core, but the false-positives are a problem now.
> 
> Apart from this dependency problem, bitbake has a problem as well. Does anyone know why bitbake does:
> 
> 	compressiontool --stdout file.tar.compressed | tar x
> 
> instead of:
> 
> 	tar xf file.tar.compressed 

The unpack code is rather old, its age being around a decade. A decade
ago, tar without inbuilt decompression support was not uncommon. The
code has remained unchanged...

zlib was added, I know that most tar has bzip2 now. I'm not 100% sure
which formats we could rely on being in tar though. It would also be
interesting to know which performs better on a multicore system.

Cheers,

Richard