package xCAT::Yum;
use DBI;
use File::Find;
use File::Spec;
use File::Path;

my $yumrepofile;
my $distname;
my $arch;
my $installpfx;

sub localize_yumrepo {
    my $self = shift;
    my $installroot = shift;
    $distname = shift;
    $arch = shift;

    $installpfx = "$installroot/$distname/$arch";
    mkpath("$installroot/postscripts/repos/$distname/$arch/");
    open($yumrepofile,">","$installroot/postscripts/repos/$distname/$arch/local-repository.tmpl");
    my %options=(
      wanted => \&check_tofix,
      follow_fast => 1
      );
    find(\%options,$installpfx);    
     close($yumrepofile);
}

sub check_tofix {
   if (-d $File::Find::name and $File::Find::name =~ /\/repodata$/) {
		if($distname =~ /rhels5/)
		{
		  fix_directory($File::Find::name);
		}
		generate_repo($File::Find::name);
   }
}
sub generate_repo
{
    #write local-repository.tmpl
    my $dirlocation = shift;
    my @dircomps = File::Spec->splitdir($dirlocation);
    pop(@dircomps);
    my $yumurl = File::Spec->catdir(@dircomps);
    $yumurl =~ s!$installpfx!http://#INSTSERVER#/install/$distname/$arch/!;
    my $reponame = $dircomps[$#dircomps];
    print $yumrepofile "[local-$distname-$arch-$reponame]\n";
    print $yumrepofile "name=xCAT configured yum repository for $distname/$arch/$reponame\n";
    print $yumrepofile "baseurl=$yumurl\n";
    print $yumrepofile "enabled=1\n";
    print $yumrepofile "gpgcheck=0\n\n";
}
sub fix_directory { 

    my @xmlines=();
    my $primaryxml;
  
    $grep_result = system("grep sha256 $dirlocation/repomd.xml|grep \\<checksum");
    if( $grep_result == 0 )
    {
        $sha_command = "sha256sum";
    }
    else
    {
        $sha_command = "sha1sum";
    }
  #-----------------------------------------------------------------------
    my $oldsha;
    my $newsha;
    my $oldopensha;
    my $newopensha;

    if( -r "$dirlocation/primary.xml.gz")
    {
        $oldsha=`/usr/bin/$sha_command $dirlocation/primary.xml.gz`;
        $oldsha =~ s/\s.*//;
        chomp($oldsha);
        
        #update primary.xml.gz & primary.xml
		if( -r  "$dirlocation/primary.xml")
        {
            unlink("$dirlocation/primary.xml");
        }
        system("/bin/gunzip  $dirlocation/primary.xml.gz");
        
        $oldopensha=`/usr/bin/$sha_command $dirlocation/primary.xml`;
        $oldopensha =~ s/\s+.*//;
        chomp($oldopensha);

        open($primaryxml,"+<$dirlocation/primary.xml");
        while (<$primaryxml>) {
            s!xml:base="media://[^"]*"!!g;
            push @xmlines,$_;
        }
        seek($primaryxml,0,0);
        print $primaryxml (@xmlines);
        truncate($primaryxml,tell($primaryxml));
        @xmlines=();
        close($primaryxml);
        
        $newopensha=`/usr/bin/$sha_command $dirlocation/primary.xml`;
        $newopensha =~ s/\s.*//;
        chomp($newopensha);

        system("/bin/gzip $dirlocation/primary.xml");
        $newsha=`/usr/bin/$sha_command $dirlocation/primary.xml.gz`;
        $newsha =~ s/\s.*//;
        chomp($newsha);
    }
  
  #-----------------------------------------------------------------------
  
    my $newdbsha;
    my $olddbsha; 
    my $newdbopensha;
    my $olddbopensha;
  
    if (-r "$dirlocation/primary.sqlite.bz2") { 
    
        $olddbsha =`/usr/bin/$sha_command $dirlocation/primary.sqlite.bz2`;
        $olddbsha =~ s/\s.*//;
        chomp($olddbsha);
    
        #update primary.sqlite.bz2 & primary.sqlite
        if ( -r "$dirlocation/primary.sqlite")
        {
            unlink("$dirlocation/primary.sqlite");
        }
        
        system("/usr/bin/bunzip2  $dirlocation/primary.sqlite.bz2");
        $olddbopensha=`/usr/bin/$sha_command $dirlocation/primary.sqlite`;
        $olddbopensha =~ s/\s+.*//;
        chomp($olddbopensha);

        my $pdbh = DBI->connect("dbi:SQLite:$dirlocation/primary.sqlite","","",{AutoCommit=>1});
        $pdbh->do('UPDATE "packages" SET "location_base" = NULL');
        $pdbh->disconnect;
        $newdbopensha=`/usr/bin/$sha_command $dirlocation/primary.sqlite`;
        $newdbopensha =~ s/\s.*//;
        chomp($newdbopensha);

        system("/usr/bin/bzip2 $dirlocation/primary.sqlite");
        $newdbsha=`/usr/bin/$sha_command $dirlocation/primary.sqlite.bz2`;
        $newdbsha =~ s/\s.*//;
        chomp($newdbsha);
    }
  
  #-----------------------------------------------------------------------

    #update repomd.xml
    open($primaryxml,"+<$dirlocation/repomd.xml");
    while (<$primaryxml>) { 
        if($_ =~ m/\<size\>/)
        {
            next;
        }
        if($_ =~ m/\<open-size\>/)
        {
            next;
        }
        s!xml:base="media://[^"]*"!!g;
        if(defined($oldsha)){
            s!$oldsha!$newsha!g;
        }
        if(defined($oldopensha)){
            s!$oldopensha!$newopensha!g;
        }
        if(defined($olddbsha)){
            s!$olddbsha!$newdbsha!g;
        }
        if(defined($olddbopensha)){
            s!$olddbopensha!$newdbopensha!g;
        }
        push @xmlines,$_;
    }
    seek($primaryxml,0,0);
    print $primaryxml (@xmlines);
    truncate($primaryxml,tell($primaryxml));
    close($primaryxml);
    @xmlines=();
}


1;