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Re: [Ltib] How to force a package build if its PRECONFIG changed?

From: Peter Barada
Subject: Re: [Ltib] How to force a package build if its PRECONFIG changed?
Date: Mon, 21 Mar 2011 16:56:08 -0400
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On 03/21/2011 03:56 PM, Peter Barada wrote:
> Stuart,
> How can I have "./ltib" force a rebuild of a package (kernel, busybox, etc) 
> if the content of its PRECONFIG file changed?  I.e. if I change the kernel or 
> busybox .config file(i.e newer than the generated rpm file), how can i 
> trigger a build of that package?
> I've gotten bitten by enabling CONFIG_FEATURE_IFCONFIG_HW in the 
> busybox.config file I'm using and the automated build didn't detect that 
> busybox needed to be rebuilt.
> I'll code it up and experimet, but I'm not sure how to get the dates for the 
> preconfig and resultant rpm files(as my perl fu is weak).
> Any help is appreciated.

I think I've figured it out.  Following in build_rpm looks to work (and handles 
the case of a preconfig file being in either the platform or defaults 
directory) after "my $dir_bld = ...":

    my $preconfig_file = $pcf->{$key . "_PRECONFIG"};
    my $preconfig_bld = 0;
    if ( $preconfig_file ) {
    my $dflts = "defaults";
    if ( -f "$cf->{top}/$cf->{plat_dir}/$preconfig_file" ) {
        $preconfig_file = "$cf->{top}/$cf->{plat_dir}/$preconfig_file";
    } else {
        if ( -f "${cf}->{config_dir}/$dflts/$preconfig_file" ) {
        $preconfig_file = "${cf}->{config_dir}/$dflts/$preconfig_file";
    if ( $rpms[0] && -f $rpms[0]) {
        if ( -M $rpms[0] > -M $preconfig_file ) {
        $preconfig_bld = 1;

And then adding:
    $r   .= "preconfig file changed, "   if $preconfig_bld;

after "my $r = '';" in build_rpm()

Of course there may be a much more efficient way to do this, any suggestions 

Peter Barada

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