From 5e4789671ae4ecd9d2eb239e865f15ef60232287 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 5 Oct 2014 16:41:33 +0000
Subject: [PATCH] build: add support for declaring package CONFLICTS which only
 affect selecting built-in packages

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 42770
---
 include/package-defaults.mk |  1 +
 include/package-dumpinfo.mk |  1 +
 scripts/metadata.pl         | 13 +++++++++++++
 scripts/metadata.pm         |  1 +
 4 files changed, 16 insertions(+)

diff --git a/include/package-defaults.mk b/include/package-defaults.mk
index 19f2a16045..6a345b6fb9 100644
--- a/include/package-defaults.mk
+++ b/include/package-defaults.mk
@@ -19,6 +19,7 @@ define Package/Default
   CATEGORY:=Extra packages
   DEPENDS:=
   MDEPENDS:=
+  CONFLICTS:=
   PROVIDES:=
   EXTRA_DEPENDS:=
   MAINTAINER:=$(PKG_MAINTAINER)
diff --git a/include/package-dumpinfo.mk b/include/package-dumpinfo.mk
index 5d1d76fee5..26c8d3199d 100644
--- a/include/package-dumpinfo.mk
+++ b/include/package-dumpinfo.mk
@@ -31,6 +31,7 @@ $(if $(MENU),Menu: $(MENU)
 )$(if $(findstring $(PREREQ_CHECK),1),Prereq-Check: 1
 )Version: $(VERSION)
 Depends: $(call PKG_FIXUP_DEPENDS,$(1),$(DEPENDS))
+Conflicts: $(CONFLICTS)
 Menu-Depends: $(MDEPENDS)
 Provides: $(PROVIDES)
 $(if $(VARIANT),Build-Variant: $(VARIANT)
diff --git a/scripts/metadata.pl b/scripts/metadata.pl
index 4014613de6..366e61cb63 100755
--- a/scripts/metadata.pl
+++ b/scripts/metadata.pl
@@ -522,6 +522,18 @@ sub mconf_depends {
 	return $res;
 }
 
+sub mconf_conflicts {
+	my $pkgname = shift;
+	my $depends = shift;
+	my $res = "";
+
+	foreach my $depend (@$depends) {
+		next unless $package{$depend};
+		$res .= "\t\tdepends on m || (PACKAGE_$depend != y)\n";
+	}
+	return $res;
+}
+
 sub print_package_config_category($) {
 	my $cat = shift;
 	my %menus;
@@ -583,6 +595,7 @@ sub print_package_config_category($) {
 			}
 			print mconf_depends($pkg->{name}, $pkg->{depends}, 0);
 			print mconf_depends($pkg->{name}, $pkg->{mdepends}, 0);
+			print mconf_conflicts($pkg->{name}, $pkg->{conflicts});
 			print "\t\thelp\n";
 			print $pkg->{description};
 			print "\n";
diff --git a/scripts/metadata.pm b/scripts/metadata.pm
index ab5abc0363..16acb8ea8f 100644
--- a/scripts/metadata.pm
+++ b/scripts/metadata.pm
@@ -113,6 +113,7 @@ sub parse_package_metadata($) {
 		};
 		/^Menu-Depends: \s*(.+)\s*$/ and $pkg->{mdepends} = [ split /\s+/, $1 ];
 		/^Depends: \s*(.+)\s*$/ and $pkg->{depends} = [ split /\s+/, $1 ];
+		/^Conflicts: \s*(.+)\s*$/ and $pkg->{conflicts} = [ split /\s+/, $1 ];
 		/^Hidden: \s*(.+)\s*$/ and $pkg->{hidden} = 1;
 		/^Build-Variant: \s*([\w\-]+)\s*/ and $pkg->{variant} = $1;
 		/^Default-Variant: .*/ and $pkg->{variant_default} = 1;