On Feb 1, 2008, at 7:22 AM, Stefan Westmeier wrote:

> Hi,
>
> I would like to use rpm in the following scenario and I guess I  
> need some hints
> how to do with rpm / rpm 5:
>
> I fetch the sources I want to package not from a tar file but from  
> a repository and
> have build them already with my normal build system I use for  
> development in my
> workarea.
>
> So I would like to prevent the standard %prep and %build steps and  
> start right away
> with the install and packaging steps in my workarea.
>
> Important side condition: I might have more than one instance of a  
> project checked out
> in several work areas.
>
> So my first attempt was to set %_topdir so that I can have several  
> workareas in parallel
> containing local rpm administrative directories ( RPMS,  
> SRCS, ... ). So far I did set the macro
> in my ~/.rpmmacros file. Unfortuanetly this does not work properly,  
> as I have to set a different
> _topdir for each of my workarea instances. And I want to build in  
> parallel.
>
> Now my questions:
>
> 1. can I pass macros somehow to rpmbuild on the commandline ?
>     I need to use a different set of macros for each of my workareas.
>

Yes, there is a --define option. However encapsulating settings per- 
workarea
is likely to easier than adding gazillions of CLI options.

>
> 2. how can I direct rpm to look for files to pick up in the install  
> step in my workarea ?
>     I guess setting %_builddir might work?
>

I'm not sure what "files to pick up means" and so can't answer  
specifically.

>
> 3. Any other hints how to do "Packaging that can build anywhere"?
>     Current hints I got from MAX-RPM.
>

I have multiple work areas and multiple versions of rpm installed all  
the time.

I usually uses capital letters for work areas: /X /Y /Z.

I encapsulate the work area specific configuration in, say, /X/macros.

Here's an configuration for work-area /X

%_topdir        /X
%_legion        %{expand:%%global ._legion %{name}}%{_legion}
%_ntopdir       %{_topdir}/%{_legion}
%_builddir      %{_ntopdir}
%_sourcedir     %{_ntopdir}
%_specdir       %{_ntopdir}
%_rpmdir        %{_ntopdir}
%_srcrpmdir     %{_ntopdir}
%_rpmfilename   %%{NAME}-%%{VERSION}-%%{RELEASE}.%%{ARCH}.rpm

%_tmppath       %{_topdir}/tmp


In order to relieve the tedium of adding --macros options, I have small
shell wrappers in ~/bin that configure work-area specific config.

Here is the wrapper for /X (from ~/bin/xrpm):

#!/bin/sh
macros="/usr/lib/rpm/macros:/usr/lib/rpm/%{_target}/macros:/etc/rpm/ 
macros.specspo:/etc/rpm/macros.sqlite:/etc/rpm/macros.cdb:/etc/rpm/ 
macros:/etc/rpm/%{_target}/macros:~/.rpmmacros:/X/macros"

case $1 in
-t*|-b*)        rpm=/usr/bin/rpmbuild;;
*)      rpm=/usr/bin/rpm;;
esac

exec $rpm --macros ${macros} $*


And my work-flow to build a package "foo" looks something like

     xrpm -i foo*.src.rpm
     cd /X/foo
     xrpm -ba foo.spec
     rpm -Uvh foo*6.rpm
     cd ..
     rm -rf foo

hth

73 de Jeff