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buildenv.pl: Create symlinks in priority order
This reduces unnecessary symlink/unlink steps.
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1 changed files with 12 additions and 9 deletions
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@ -78,10 +78,10 @@ sub createLinks {
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if (-l $dstFile) {
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my $target = readlink $dstFile;
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my $prevPriority = $priorities{$dstFile};
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die ( "Collission between `$srcFile' and `$target'. "
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. "Suggested solution: use `nix-env --set-flag "
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die ( "collission between `$srcFile' and `$target'; "
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. "use `nix-env --set-flag "
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. "priority NUMBER PKGNAME' to change the priority of "
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. "one of the conflicting packages.\n" )
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. "one of the conflicting packages\n" )
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if $prevPriority == $priority;
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next if $prevPriority < $priority;
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unlink $dstFile or die;
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@ -125,7 +125,7 @@ sub addPkg {
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# Convert the stuff we get from the environment back into a coherent
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# data type.
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my %pkgs;
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my @pkgs;
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my @derivations = split ' ', $ENV{"derivations"};
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while (scalar @derivations) {
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my $active = shift @derivations;
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@ -133,18 +133,21 @@ while (scalar @derivations) {
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my $outputs = shift @derivations;
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for (my $n = 0; $n < $outputs; $n++) {
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my $path = shift @derivations;
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$pkgs{$path} =
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{ active => $active ne "false"
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push @pkgs,
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{ path => $path
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, active => $active ne "false"
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, priority => int($priority) };
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}
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}
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# Symlink to the packages that have been installed explicitly by the
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# user.
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foreach my $pkg (sort (keys %pkgs)) {
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# user. Process in priority order to reduce unnecessary
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# symlink/unlink steps.
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@pkgs = sort { $a->{priority} <=> $b->{priority} || $a->{path} cmp $b->{path} } @pkgs;
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foreach my $pkg (@pkgs) {
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#print $pkg, " ", $pkgs{$pkg}->{priority}, "\n";
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addPkg($pkg, $pkgs{$pkg}->{priority}) if $pkgs{$pkg}->{active};
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addPkg($pkg->{path}, $pkg->{priority}) if $pkg->{active};
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}
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