Retrieving the value of a macro defined in a spec file

[Jeff Peeler]

I'm trying to extract a %global after it has been evaluated as it would end up
during build time. rpmspec -P almost works, but the output is stripped of all
the %global macros, so the macro is not able to be grepped. My understanding
is that I can't use eval as that does not evalute macros that are done only at
build time, which I assume is true for my spec below. I'm interested in getting
the value of release_version, but I guess the process would be the same for any
of them.

%global project_name heat
Source99: sources
%global release_version %(cat %{SOURCE99} | awk %'{sub(/%{project_name}-/,
""); sub(/.tar.gz/, ""); print $2}')
...

It would be great if there were a solution available in python, but I've not
found anything in the TransactionSet API of value. Surely this must be possible
as "fedpkg mockbuild" works as expected.

Jeff

[T.C. Hollingsworth]

On Fri, Jun 20, 2014 at 8:00 PM, Jeff Peeler <jpeeler(a)redhat.com&gt; wrote:
>  It would be great if there were a solution available in python, but
> I've not
>  found anything in the TransactionSet API of value. Surely this must be possible
>  as "fedpkg mockbuild" works as expected. 
This looks wrong but actually works just fine:

In [1]: import rpm

In [2]: rpm.spec('js-jquery.spec')
Out[2]: <rpm.spec at 0x7f223f00bb70>

In [3]: rpm.expandMacro('%{shortcommit}')
Out[3]: '4dec426'

(%{shortcommit} in this spec is used as explained in [1].)

There ought to be a more OO-way but I couldn't find it poking around
when I needed this awhile ago.

-T.C.

[1] http://fedoraproject.org/wiki/Packaging:SourceURL#Github

[Jeff Peeler]

On Fri, Jun 20, 2014 at 09:17:48PM -0700, T.C. Hollingsworth wrote:
>  On Fri, Jun 20, 2014 at 8:00 PM, Jeff Peeler
> <jpeeler(a)redhat.com&gt; wrote:
>  > It would be great if there were a solution available in python, but I've not
>  > found anything in the TransactionSet API of value. Surely this must be possible
>  > as "fedpkg mockbuild" works as expected.
>  
>  This looks wrong but actually works just fine:
>  
>  In [1]: import rpm
>  
>  In [2]: rpm.spec('js-jquery.spec')
>  Out[2]: <rpm.spec at 0x7f223f00bb70>
>  
>  In [3]: rpm.expandMacro('%{shortcommit}')
>  Out[3]: '4dec426'
>  
>  (%{shortcommit} in this spec is used as explained in [1].)
>  
>  There ought to be a more OO-way but I couldn't find it poking around
>  when I needed this awhile ago.
>  
>  -T.C.
>  
>  [1] http://fedoraproject.org/wiki/Packaging:SourceURL#Github 
It sure does, thanks! Just in case it's useful, I'll include the snippet
for the archives since my macro also uses a source file:

#!/usr/bin/env python

import rpm
import os

rpm.addMacro("_sourcedir", os.getcwd())
rpm.spec('openstack-heat.spec')
print rpm.expandMacro('%{release_version}')