Make buildSRPMFromSCM faster?

[Eric Smith]

On Sat, Jul 19, 2014 at 5:30 AM, Richard W.M. Jones <rjones at redhat.com> wrote:
> (1) Limit the use of macros in Source lines, so that only a simple,
> standard, perhaps pre-cached buildroot can be used.

How about just trying to parse the Source lines, and if that fails due
to use of macros that can't be evaluated in a simpleminded way, revert
to the method used now?