Re: %{expand:...} documentation

[Michael Jennings <mej kainx org>]

On Monday, 27 August 2007, at 20:48:14 (+0200),
Jos Vos wrote:

> Just some excerpts from RHEL5 spec files (some are even used frequently):
> 
>   %{expand: %%define pyver %(python -c 'import sys;print(sys.version[0:3])')}

This is valid and proper usage, IMHO, because it prevents the subshell
execution (i.e., %(...) expansion) to be invoked every time %{pyver}
is employed in the spec file.  I do this too.

>   %{expand: %%define build_with_freetype %{?_with_freetype:1}%{!?_with_freetype:0}}

This seems unnecessary, particularly since we already have %bcond_with
and %bcond_without.  But I wouldn't call it gratuitous.

> I think this is an example of proper use (as there is a recursion), right?
> 
>   %{expand: %%define _includedir %{_includedir}/%{name}}

I believe so, yes.

Michael

-- 
Michael Jennings (a.k.a. KainX)  http://www.kainx.org/  <mej kainx org>
Linux Server/Cluster Admin, LBL.gov       Author, Eterm (www.eterm.org)
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