(big-config) allow usergroup information to be passed in from outside

[Please NOTE: this is all about *user* groups, not *repo* groups]

SUMMARY: gl-auth-commmand can now take an optional list of usergroup
names after the first argument (which is the username).

See doc/big-config.mkd in the next commit or so

src/gitolite.pm

@@ -530,7 +530,13 @@ sub get_memberships {
     }
 
     # deal with returning user info first
-    return (@ret) unless $is_repo;
+    unless ($is_repo) {
+        # add in group membership info sent in via second and subsequent
+        # arguments to gl-auth-command; be sure to prefix the "@" sign to each
+        # of them!
+        push @ret, map { s/^/@/; $_; } split(' ', $ENV{GL_GROUP_LIST}) if $ENV{GL_GROUP_LIST};
+        return (@ret);
+    }
 
     # enforce the rule about ignoring all wildcard matches if a non-wild match
     # exists while returning.  (The @ret gating above does not adequately

src/gl-auth-command

@@ -71,6 +71,10 @@ if ($ARGV[0] eq '-s') {
 # first, fix the biggest gripe I have with gitosis, a 1-line change
 my $user=$ENV{GL_USER}=shift;       # there; now that's available everywhere!
 
+# if there are any more arguments, they're a list of group names that the user
+# is a member of
+$ENV{GL_GROUP_LIST} = join(" ", @ARGV) if @ARGV;
+
 # ----------------------------------------------------------------------------
 #       logging, timestamp env vars
 # ----------------------------------------------------------------------------