6 Oct
2012
6 Oct
'12
9:51 a.m.
On Saturday 29 of September 2012 04:05:43 Timothy Pearson wrote:
Because for now, you can not change from native packages to quilt, I have two
other ways to reduce packages size!
__1__
I tested that all currently supported distributions (Debian from Squeeze,
Ubuntu from Lucid) have support for source packages using XZ compression.
Switching from bzip2 to XZ can reduce source packages about 12%.
If there are no objections, I can make this change immediately.
__2__
I noticed that although we use bzip2 compression for source packages inside
binary packages are still gzip. I checked that there is also possibility to
switch compression for binary packages. I tested, that except Lucid is
possible to use inside binary packages XZ compression. For Lucid can be used
bzip2. The need to use for Lucid a different compression is not a problem. I
create rule that automatically selects compression by availability XZ:
DEB_DH_BUILDDEB_ARGS = -- -Z$(shell dpkg-deb --help | grep -q ":.* xz[,.]" \
&& echo xz || echo bzip2)
Change from gzip to bzip2 (for Lucid) reduces binary packages by about 12%.
Change to XZ (for all others) reduces binary packages by about 25%.
If there are no objections, I add gradually this change to all packages.
--
Slavek
On Friday 28
of September 2012 17:07:33 Timothy Pearson wrote:
As this would require a change of the versioning scheme, now is not a good
time for the change.
Tim
Interesting! Are you going to do this in the R14
packaging tree as
well?
I assume that the change native => quilt could be used for the final R14
and
certainly for subsequent SRU in R14. In order to use quilt also for the
nightly-builds, it requires to modify scripts that you use to prepare
packages for nigtly-builds.
For example, it should need to change the version number used for base
tarball "orig.tar.bz2" because it is not possible to use dash for a
version
of "upstream" package on Debian. Instead of
14.0.0-0debian11+r274+pr2~wheezy
would have to be used, for example 14.0.0~r274 for the base tarball
orig.tar.bz2. And distribution specific version would in this case be:
14.0.0~r274-0debian11~wheezy.
It is therefore a question, whether is now a good time for such a change?
Slavek
--