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#!/usr/bin/perl -w

BEGIN {
  unshift @INC, ($::ENV{'BUILD_DIR'} || '/usr/lib/build');
}

use Build;
use strict;

######################################################################

my $rpmdepfile = $ARGV[0];

my %tag;

my %oldp;
my %oldr;
if (defined($rpmdepfile) && open(F, '<', $rpmdepfile)) {
  while (<F>) {
    chomp;
    if (/^P:([^ ]): /) {
      $oldp{$1} = $_;
    } elsif (/^R:([^ ]): /) {
      $oldr{$1} = $_;
    }
  }
  close F;
}

my $redo = 1;
foreach my $dir (@ARGV) {
  $redo = 0;
  my @known;
  my %known2fn;
  my %known2path;
  my %fnsize2id;
  my $cmd = "find $dir -follow -type f \\( -name \"*.rpm\" -o -name \"*.deb\" \\) -a ! -name \"*src.rpm\" -printf '\%T@/\%s/\%i \%p\\n'";
  open(F, '-|', $cmd) or next;
  while (<F>) {
    chomp;
    next unless /^([\d\.]+\/\d+\/\d+) (.*)$/;
    my $id = $1;
    my $path = $2;
    # new find added a fraction part to %T@, ignore it
    $id =~ s/^(\d+)\.\d+/$1/;
    next unless $path =~ /\.(?:rpm|deb)$/;
    my $fn = $path;
    $fn =~ s/.*\///;
    next if $fn =~ /\.(?:patch|delta)\.rpm$/;
    my ($r, $arch);
    if ($fn =~ /^(.*)-[^-]+-[^-]+\.([^\. ]+)\.rpm$/) {
      $r = $1;
      $arch = $2;
    } elsif ($path =~ /^(?:.*\/)?([^\/ ]+)\/([^\/ ]+)\.rpm$/) {
      #next if $1 eq '.';
      $r = $2;
      $arch = $1;
    } elsif ($fn =~ /^([^_]*)_(?:[^_]*)_([^_]*)\.deb$/) {
      $r = $1;
      $arch = $2;
      $arch = 'noarch' if $arch eq 'all';
    } else {
      next;
    }
    next if $arch eq 'src' || $arch eq 'nosrc';
    push @known, "$r.$arch-$id";
    $known2fn{"$r.$arch-$id"} = $fn;
    $known2path{"$r.$arch-$id"} = $path;
    my $size = (split('/', $id))[1];
    $fnsize2id{"$fn-$size"} = $id;
  }

  close F;

  my %newp;
  my %newr;
  for (@known) {
    $newp{$_} = $oldp{$_} if $oldp{$_};
    $newr{$_} = $oldr{$_} if $oldr{$_};
  }

  my @todo = grep {!($newp{$_} && $newr{$_})} @known;
  if (@todo) {
    for my $known (@todo) {
      my $path = $known2path{$known};
      if ($path =~ /\.rpm$/) {
	my %res = Build::Rpm::rpmq($path, 1000, 1001, 1002, 1006, 1022, 1047, 1049, 1048, 1050, 1112, 1113);
	next unless %res;
	Build::Rpm::add_flagsvers(\%res, 1047, 1112, 1113);
	Build::Rpm::add_flagsvers(\%res, 1049, 1048, 1050);
	my $id = $known;
	$id =~ s/.*-//;
	if ($known ne "$res{1000}->[0].$res{1022}->[0]-$id") {
	  $known = "$res{1000}->[0].$res{1022}->[0]-$id";
	  if (!$known2path{$known}) {
	    push @known, $known;
	    $known2path{$known} = $path;
	  }
	}
	# rpm3 compatibility: retrofit missing self provides
	my $name = $res{1000}->[0];
	if (!@{$res{1047} || []} || $res{1047}->[-1] !~ /^\Q$name\E =/) {
	  my $evr = "$res{1001}->[0]-$res{1002}->[0]";
	  $evr = "$res{1003}->[0]:$evr" if $res{1003} && $res{1003}->[0];
	  push @{$res{1047}}, "$name = $evr";
	}

	$newp{$known} = "P:$known: ".join(' ', @{$res{1047} || []});
	$newr{$known} = "R:$known: ".join(' ', @{$res{1049} || []});
	#$tag{$known} = $res{1000}->[0]."-".$res{1001}->[0]."-".$res{1002}->[0]." ".$res{1007}->[0]."-".$res{1006}->[0];
	$tag{$known} = $res{1000}->[0]."-".$res{1001}->[0]."-".$res{1002}->[0]." ".$res{1006}->[0];
      } else {
	my %res = Build::Deb::debq($path);
	next unless %res;
	my ($dn, $da) = ($res{'PACKAGE'}, $res{'ARCHITECTURE'});
	$da = 'noarch' if $da eq 'all';
	my $id = $known;
	$id =~ s/.*-//;
	if ($known ne "$dn.$da-$id") {
	  $known = "$dn.$da-$id";
	  if (!$known2path{$known}) {
	    push @known, $known;
	    $known2path{$known} = $path;
	  }
	}
	my @provides = split(',\s*', $res{'PROVIDES'} || '');
	my @depends = split(',\s*', $res{'DEPENDS'} || '');
	my @predepends = split(',\s*', $res{'PRE-DEPENDS'} || '');
	s/\s.*// for @provides;   #for now
	s/\s.*// for @depends;    #for now
	s/\s.*// for @predepends; #for now
	push @depends, @predepends;
	push @provides, $res{'PACKAGE'};
	$newp{$known} = "P:$known: ".join(' ', @provides);
	$newr{$known} = "R:$known: ".join(' ', @depends);
      }
    }
  }
  @known = grep {$newp{$_} && $newr{$_}} @known;
  for (@known) {
    print "F:$_: $known2path{$_}\n";
    print "$newp{$_}\n";
    print "$newr{$_}\n";
    print "I:$_: $tag{$_}\n" if exists $tag{$_};
  }
}