Make buildSRPMFromSCM faster?

[Richard W.M. Jones]

On Sat, Jul 19, 2014 at 03:37:15PM +0100, Sérgio Basto wrote:
> 
> 
> On Sáb, 2014-07-19 at 12:30 +0100, Richard W.M. Jones wrote: 
> > The first step of most Koji builds is buildSRPMFromSCM, where a
> > .src.rpm file is built from the git repo.
> > 
> > Currently this involves completely building a mock buildroot
> > containing all the BuildRequires, and running `rpmbuild -bs'.  This
> > takes many minutes (especially when arm is chosen as a builder).
> 
> If I understood the question, I use 
> fedpkg switch-branch f20 , fedpkg switch-branch master etc and fedpkg
> srpm .

The question is related to what Koji does, not what local developers
do with 'fedpkg'.

> Just if we have "Source lines might depend on RPM macros which might
> depend on any BuildRequire'd" :) 
> have you any example , Source lines ? Source lines should be immutable 
> I remember put a ifdef in a source line for i386 and src.rpm wasn't
> equal for i386 and x86_64, but should, because we only export one of
> them. 

Well something like (made up example):

  Source0: %{lang_download_url}/%{name}-%{version}.tar.gz

where %lang_download_url is an RPM macro defined in some
lang-specific package that's not part of a normal build root.

I have no idea if there are packages which do this, which is kind of
my point.  We spend probably an extra 10 minutes on each build on a
pretty obscure corner case.

Rich.

-- 
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