Add extra generated RPM requires - how?

[Richard W.M. Jones]

For libguestfs [RHBZ#547496] I want to add some extra 'Requires'
dependencies by running a shell script over a particular file that
gets generated during the build.

What's the best way, or a way, to do this?

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v

[Adam Jackson]

On Fri, 2009-12-18 at 20:26 +0000, Richard W.M. Jones wrote:
>  For libguestfs [RHBZ#547496] I want to add some extra
> 'Requires'
>  dependencies by running a shell script over a particular file that
>  gets generated during the build.
>  
>  What's the best way, or a way, to do this? 
It's... not easy.  You want to overload the %__find_provides macro to
invoke your script as well as the standard script for things like
library sonames.  If you get it working let me know, I want basically
the same thing for the X server and have so far been defeated.

- ajax

[Till Maas]

On Fri, Dec 18, 2009 at 03:54:53PM -0500, Adam Jackson wrote:
>  On Fri, 2009-12-18 at 20:26 +0000, Richard W.M. Jones wrote:
>  > For libguestfs [RHBZ#547496] I want to add some extra 'Requires'
>  > dependencies by running a shell script over a particular file that
>  > gets generated during the build.
>  > 
>  > What's the best way, or a way, to do this?
>  
>  It's... not easy.  You want to overload the %__find_provides macro to
>  invoke your script as well as the standard script for things like
>  library sonames.  If you get it working let me know, I want basically
>  the same thing for the X server and have so far been defeated. 
I once created this for ghc/haskell packages, but I believe it was never
used. I got inspired by a pythondeps.sh script.
The "trick" here is to run the rpm default dependency script from within
the new script. My attempt is available here:

http://till.fedorapeople.org/ghcdeps.sh

Regards
Till

[Steve Grubb]

On Friday 18 December 2009 03:54:53 pm Adam Jackson wrote:
>  On Fri, 2009-12-18 at 20:26 +0000, Richard W.M. Jones wrote:
>  > For libguestfs [RHBZ#547496] I want to add some extra 'Requires'
>  > dependencies by running a shell script over a particular file that
>  > gets generated during the build.
>  >
>  > What's the best way, or a way, to do this?
>  
>  It's... not easy.  You want to overload the %__find_provides macro to
>  invoke your script as well as the standard script for things like
>  library sonames.  
I used something like this:

#%_use_internal_dependency_generator     0
#%__find_requires       /home/sgrubb/bin/find-requires

and then ran a shell script that had this piece in it where $1 was a file 
suspected of being a bash script by running the file command. Since people have 
a habit of using a script name and not its full path, it uses which to resolve 
the full path. This might be better done using the full rpm database that yum 
operates off of. Anyways...this was the core of it:

# Then check its requirements
cmds=`/bin/bash --rpm-requires "$1" | sort | uniq | tr '()' ' '
| awk '{ print 
$2 }'`
for c in $cmds
do
        tgt=`which $c 2>/dev/null`
        if [ x"$tgt" = x ] ; then
                echo "$c cannot be resolved" 1>&2
                continue
        fi
        tmp_r="`rpm -qf $tgt`"
        if [ $? -eq 0 -a $RPM -eq 1 ] ; then
                # Only use good results for rpms
                r="$r\n$tmp_r"
        else
                r="$r\n$tgt"
        fi
done

echo -e $r | sort | uniq
exit 0


-Steve

[Richard W.M. Jones]

On Fri, Dec 18, 2009 at 08:26:45PM +0000, Richard W.M. Jones wrote:
>  
>  For libguestfs [RHBZ#547496] I want to add some extra 'Requires'
>  dependencies by running a shell script over a particular file that
>  gets generated during the build. 
As a follow-up, here is what I did:

  http://cvs.fedoraproject.org/viewvc/devel/libguestfs/

Specifically, adding this to the spec file:

  Source1: libguestfs-find-requires.sh
  %global _use_internal_dependency_generator 0
  %global __find_provides %{_rpmconfigdir}/find-provides
  %global __find_requires %{SOURCE1} %{_rpmconfigdir}/find-requires

along with my custom find-requires shell script:

 
http://cvs.fedoraproject.org/viewvc/devel/libguestfs/libguestfs-find-requ...

Rich.

PS. I'm convinced I posted the above information before, but now I
don't see it on the list.  Maybe I'm going mad, or maybe you'll see
two messages about this ...

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming blog: http://rwmj.wordpress.com
Fedora now supports 80 OCaml packages (the OPEN alternative to F#)
http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora