scripts: package-metadata add pkgmanifestjson call

The new `pkgmanifestjson` call prints all package manifest of a feed in
JSON format. This function can be used to print an overview of packages
information used for downstream tooling.

The script is entirely based on Petrs work on dependency visualisation.

Signed-off-by: Paul Spooren <[email protected]>

scripts/package-metadata.pl

@@ -585,6 +585,40 @@ sub gen_usergroup_list() {
 	}
 }
 
+sub gen_package_manifest_json() {
+	my $json;
+	parse_package_metadata($ARGV[0]) or exit 1;
+	foreach my $name (sort {uc($a) cmp uc($b)} keys %package) {
+		my %depends;
+		my $pkg = $package{$name};
+		foreach my $dep (@{$pkg->{depends} || []}) {
+			if ($dep =~ m!^\+?(?:[^:]+:)?([^@]+)$!) {
+				$depends{$1}++;
+			}
+		}
+		my @depends = sort keys %depends;
+		my $pkg_deps = join ' ', map { qq/"$_",/ } @depends;
+		$pkg_deps =~ s/\,$//;
+
+		my $pkg_maintainer = join ' ', map { qq/"$_",/ } @{$pkg->{maintainer} || []};
+		$pkg_maintainer =~ s/\,$//;
+
+		$json = <<"END_JSON";
+${json}{
+"name":"$name",
+"version":"$pkg->{version}",
+"category":"$pkg->{category}",
+"license":"$pkg->{license}",
+"maintainer": [$pkg_maintainer],
+"depends":[$pkg_deps]},
+END_JSON
+	}
+
+	$json =~ s/[\n\r]//g;
+	$json =~ s/\,$//;
+	print "[$json]";
+}
+
 sub parse_command() {
 	GetOptions("ignore=s", \@ignore);
 	my $cmd = shift @ARGV;
@@ -594,6 +628,7 @@ sub parse_command() {
 		/^kconfig/ and return gen_kconfig_overrides();
 		/^source$/ and return gen_package_source();
 		/^pkgaux$/ and return gen_package_auxiliary();
+		/^pkgmanifestjson$/ and return gen_package_manifest_json();
 		/^license$/ and return gen_package_license(0);
 		/^licensefull$/ and return gen_package_license(1);
 		/^usergroup$/ and return gen_usergroup_list();
@@ -606,6 +641,7 @@ Available Commands:
 	$0 kconfig [file] [config] [patchver]	Kernel config overrides
 	$0 source [file] 			Package source file information
 	$0 pkgaux [file]			Package auxiliary variables in makefile format
+	$0 pkgmanifestjson [file]		Package manifests in JSON format
 	$0 license [file] 			Package license information
 	$0 licensefull [file] 			Package license information (full list)
 	$0 usergroup [file]			Package usergroup allocation list