base-files, metadata: support additional group membership

Some packages may require additional group membership for the system
user added by that package. Allow defining additional groups as third
member of the ':'-separated tuple, allowing to specify multiple
','-separated groups with optional GID.

Example:
USERID:=foouser=1000:foogroup=1000:addg1=1001,addg2=1002,addg3

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/scripts/metadata.pm b/scripts/metadata.pm
index f252c5309c..ee5a2945ca 100644
--- a/scripts/metadata.pm
+++ b/scripts/metadata.pm
@@ -295,13 +295,19 @@ sub parse_package_metadata($) {
 			my @ugspecs = split /\s+/, $1;
 
 			for my $ugspec (@ugspecs) {
-				my @ugspec = split /:/, $ugspec, 2;
+				my @ugspec = split /:/, $ugspec, 3;
 				if ($ugspec[0]) {
 					parse_package_metadata_usergroup($src->{makefile}, "user", \%usernames, \%userids, $ugspec[0]) or return 0;
 				}
 				if ($ugspec[1]) {
 					parse_package_metadata_usergroup($src->{makefile}, "group", \%groupnames, \%groupids, $ugspec[1]) or return 0;
 				}
+				if ($ugspec[2]) {
+					my @addngroups = split /,/, $ugspec[2];
+					for my $addngroup (@addngroups) {
+						parse_package_metadata_usergroup($src->{makefile}, "group", \%groupnames, \%groupids, $addngroup) or return 0;
+					}
+				}
 			}
 		};
 	}