From 47f292ff7823e9d844e946d221f5708bf51b15fd Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sat, 6 Jan 2018 17:12:03 +0100
Subject: [PATCH] metadata: interate over source packages when generating
 Makefile

All build dependencies are between source packages. Interating over source
rather than binary packages simplifies parts of the code and prepares
further improvement.

As a side effect, this changes the implicit default variant of a few
packages (the first defined is used now instead of the lexicographically
first).

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
---
 scripts/metadata.pm         |  1 +
 scripts/package-metadata.pl | 61 +++++++++++++++++++++----------------
 2 files changed, 36 insertions(+), 26 deletions(-)

diff --git a/scripts/metadata.pm b/scripts/metadata.pm
index 8cc7530a1d..9d6f3216d1 100644
--- a/scripts/metadata.pm
+++ b/scripts/metadata.pm
@@ -213,6 +213,7 @@ sub parse_package_metadata($) {
 			$subdir =~ s/^package\///;
 			$subdir{$src} = $subdir;
 			$srcpackage{$src} = {
+				makefile => $makefile,
 				packages => [],
 				buildtypes => [],
 				builddepends => [],
diff --git a/scripts/package-metadata.pl b/scripts/package-metadata.pl
index 97b57c65eb..1031e11460 100755
--- a/scripts/package-metadata.pl
+++ b/scripts/package-metadata.pl
@@ -414,36 +414,45 @@ sub get_conditional_dep($$) {
 sub gen_package_mk() {
 	my %conf;
 	my %dep;
-	my %done;
 	my $line;
 
 	parse_package_metadata($ARGV[0]) or exit 1;
-	foreach my $name (sort {uc($a) cmp uc($b)} keys %package) {
-		my $config;
-		my $pkg = $package{$name};
-		my $src = $srcpackage{$pkg->{src}};
+	foreach my $srcname (sort {uc($a) cmp uc($b)} keys %srcpackage) {
+		my $src = $srcpackage{$srcname};
+		my $path = $subdir{$srcname}.$srcname;
+		my $variant_default;
 		my @srcdeps;
 
-		next if defined $pkg->{vdepends};
+		foreach my $pkg (@{$src->{packages}}) {
+			next if defined $pkg->{vdepends};
+
+			my $config = '';
+			$config = "\$(CONFIG_PACKAGE_$pkg->{name})" unless $pkg->{buildonly};
+
+			$pkg->{prereq} and print "prereq-$config += $path\n";
+
+			next if $pkg->{buildonly};
+
+			print "package-$config += $path\n";
 
-		$config = "\$(CONFIG_PACKAGE_$name)";
-		if ($config) {
-			$pkg->{buildonly} and $config = "";
-			print "package-$config += $pkg->{subdir}$pkg->{src}\n";
 			if ($pkg->{variant}) {
-				if (!defined($done{$pkg->{src}}) or $pkg->{variant_default}) {
-					print "\$(curdir)/$pkg->{subdir}$pkg->{src}/default-variant := $pkg->{variant}\n";
+				if (!defined($variant_default) or $pkg->{variant_default}) {
+					$variant_default = $pkg->{variant};
 				}
-				print "\$(curdir)/$pkg->{subdir}$pkg->{src}/variants += \$(if $config,$pkg->{variant})\n"
+				print "\$(curdir)/$path/variants += \$(if $config,$pkg->{variant})\n";
 			}
-			$pkg->{prereq} and print "prereq-$config += $pkg->{subdir}$pkg->{src}\n";
 		}
 
-		next if $done{$pkg->{src}};
-		$done{$pkg->{src}} = 1;
+		if (defined($variant_default)) {
+			print "\$(curdir)/$path/default-variant := $variant_default\n";
+		}
+
+		unless (grep {!$_->{buildonly}} @{$src->{packages}}) {
+			print "package- += $path\n";
+		}
 
 		if (@{$src->{buildtypes}} > 0) {
-			print "buildtypes-$pkg->{subdir}$pkg->{src} = ".join(' ', @{$src->{buildtypes}})."\n";
+			print "buildtypes-$path = ".join(' ', @{$src->{buildtypes}})."\n";
 		}
 
 		foreach my $dep (@{$src->{builddepends}}, map { @{$_->{depends}} } @{$src->{packages}}) {
@@ -477,7 +486,7 @@ sub gen_package_mk() {
 				if (defined($pkg_dep) && defined($pkg_dep->{src})) {
 					unless (!$deptype || grep { $_ eq $deptype } @{$srcpackage{$pkg_dep->{src}}{buildtypes}}) {
 						warn sprintf "WARNING: Makefile '%s' has a %s build dependency on '%s/%s' but '%s' does not implement a '%s' build type\n",
-							$pkg->{makefile}, $type, $pkg_dep->{src}, $deptype, $pkg_dep->{makefile}, $deptype;
+							$src->{makefile}, $type, $pkg_dep->{src}, $deptype, $pkg_dep->{makefile}, $deptype;
 						next;
 					}
 					$idx = $pkg_dep->{subdir}.$pkg_dep->{src};
@@ -494,7 +503,7 @@ sub gen_package_mk() {
 			}
 			my $depline = join(" ", sort keys %deplines);
 			if ($depline) {
-				$line .= "\$(curdir)/".$pkg->{subdir}."$pkg->{src}/$type/compile += $depline\n";
+				$line .= "\$(curdir)/$path/$type/compile += $depline\n";
 			}
 		}
 
@@ -531,7 +540,7 @@ sub gen_package_mk() {
 				if (defined $pkg_dep->{src}) {
 					unless (!$deptype || grep { $_ eq $deptype } @{$srcpackage{$pkg_dep->{src}}{buildtypes}}) {
 						warn sprintf "WARNING: Makefile '%s' has a build dependency on '%s/%s' but '%s' does not implement a '%s' build type\n",
-							$pkg->{makefile}, $pkg_dep->{src}, $deptype, $pkg_dep->{makefile}, $deptype;
+							$src->{makefile}, $pkg_dep->{src}, $deptype, $pkg_dep->{makefile}, $deptype;
 						next;
 					}
 					$idx = $pkg_dep->{subdir}.$pkg_dep->{src};
@@ -543,17 +552,17 @@ sub gen_package_mk() {
 					$idx .= $suffix;
 
 					my $depline;
-					next if $pkg->{src} eq $pkg_dep->{src}.$suffix;
-					next if $dep{$condition.":".$pkg->{src}."->".$idx};
-					next if $dep{$pkg->{src}."->($dep)".$idx} and $pkg_dep->{vdepends};
+					next if $srcname eq $pkg_dep->{src}.$suffix;
+					next if $dep{$condition.":".$srcname."->".$idx};
+					next if $dep{$srcname."->($dep)".$idx} and $pkg_dep->{vdepends};
 					my $depstr;
 
 					if ($pkg_dep->{vdepends}) {
 						$depstr = "\$(if \$(CONFIG_PACKAGE_$dep),\$(curdir)/$idx/compile)";
-						$dep{$pkg->{src}."->($dep)".$idx} = 1;
+						$dep{$srcname."->($dep)".$idx} = 1;
 					} else {
 						$depstr = "\$(curdir)/$idx/compile";
-						$dep{$pkg->{src}."->".$idx} = 1;
+						$dep{$srcname."->".$idx} = 1;
 					}
 					$depline = get_conditional_dep($condition, $depstr);
 					if ($depline) {
@@ -564,7 +573,7 @@ sub gen_package_mk() {
 		}
 		my $depline = join(" ", sort keys %deplines);
 		if ($depline) {
-			$line .= "\$(curdir)/".$pkg->{subdir}."$pkg->{src}/compile += $depline\n";
+			$line .= "\$(curdir)/$path/compile += $depline\n";
 		}
 	}