add experimental support for a new menuconfig submenu "Package features".

allows selection between multiple packages providing the same feature, which affects dependencies of other packages.
will be used e.g. for choosing between DirectFB and X.org for libraries like GTK2

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18056 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 25 insertions, 0 deletions

diff --git a/scripts/metadata.pl b/scripts/metadata.pl
index 8f146c3b0..2da885117 100755
--- a/scripts/metadata.pl
+++ b/scripts/metadata.pl
@@ -533,6 +533,30 @@ sub print_package_config_category($) {
 	undef $category{$cat};
 }
 
+sub print_package_features() {
+	keys %features > 0 or return;
+	print "menu \"Package features\"\n";
+	foreach my $n (keys %features) {
+		my @features = sort { $b->{priority} <=> $a->{priority} or $a->{title} cmp $b->{title} } @{$features{$n}};
+		print <<EOF;
+choice
+	prompt "$features[0]->{target_title}"
+	default FEATURE_$features[0]->{name}
+EOF
+
+		foreach my $feature (@features) {
+			print <<EOF;
+	config FEATURE_$feature->{name}
+		bool "$feature->{title}"
+		help
+$feature->{description}
+EOF
+		}
+		print "endchoice\n"
+	}
+	print "endmenu\n\n";
+}
+
 sub gen_package_config() {
 	parse_package_metadata($ARGV[0]) or exit 1;
 	print "menuconfig UCI_PRECONFIG\n\tbool \"Image configuration\"\n" if %preconfig;
@@ -549,6 +573,7 @@ sub gen_package_config() {
 EOF
 		}
 	}
+	print_package_features();
 	print_package_config_category 'Base system';
 	foreach my $cat (keys %category) {
 		print_package_config_category $cat;