Add the output option '--roles' to get_maintainer.pl.  This causes it
to show the role of each email address, i.e. why it was selected.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 scripts/get_maintainer.pl |   52 ++++++++++++++++++++++++++++++++-------------
 1 files changed, 37 insertions(+), 15 deletions(-)

diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index cdb44b6..591fd3d 100755
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -33,6 +33,7 @@ my $email_git_blame = 0;
 my $email_remove_duplicates = 1;
 my $output_multiline = 1;
 my $output_separator = ", ";
+my $output_roles = 0;
 my $scm = 0;
 my $web = 0;
 my $subsystem = 0;
@@ -78,6 +79,7 @@ if (!GetOptions(
 		'l!' => \$email_list,
 		's!' => \$email_subscriber_list,
 		'multiline!' => \$output_multiline,
+		'roles!' => \$output_roles,
 		'separator=s' => \$output_separator,
 		'subsystem!' => \$subsystem,
 		'status!' => \$status,
@@ -293,9 +295,9 @@ if ($email) {
 
 	    $email_address = format_email($1, $2);
 	    if ($email_git_penguin_chiefs) {
-		push(@email_to, $email_address);
+		push(@email_to, [$email_address, 'chief penguin']);
 	    } else {
-		@email_to = grep(!/${email_address}/, @email_to);
+		@email_to = grep($_->[0] !~ /${email_address}/, @email_to);
 	    }
 	}
     }
@@ -309,7 +311,7 @@ if ($email || $email_list) {
     if ($email_list) {
 	@to = (@to, @list_to);
     }
-    output(uniq(@to));
+    output(merge_email(@to));
 }
 
 if ($scm) {
@@ -381,6 +383,7 @@ Output type options:
   --separator [, ] => separator for multiple entries on 1 line
     using --separator also sets --nomultiline if --separator is not [, ]
   --multiline => print 1 entry per line
+  --roles => show roles
 
 Other options:
   --pattern-depth => Number of pattern directory traversals (default: 0 (all))
@@ -537,11 +540,11 @@ sub add_categories {
 		}
 		if ($list_additional =~ m/subscribers-only/) {
 		    if ($email_subscriber_list) {
-			push(@list_to, $list_address);
+			push(@list_to, [$list_address, 'subscriber list']);
 		    }
 		} else {
 		    if ($email_list) {
-			push(@list_to, $list_address);
+			push(@list_to, [$list_address, 'open list']);
 		    }
 		}
 	    } elsif ($ptype eq "M") {
@@ -558,7 +561,7 @@ sub add_categories {
 		    }
 		}
 		if ($email_maintainer) {
-		    push_email_addresses($pvalue);
+		    push_email_addresses($pvalue, 'maintainer');
 		}
 	    } elsif ($ptype eq "T") {
 		push(@scm, $pvalue);
@@ -585,7 +588,7 @@ sub email_inuse {
 }
 
 sub push_email_address {
-    my ($line) = @_;
+    my ($line, $role) = @_;
 
     my ($name, $address) = parse_email($line);
 
@@ -594,9 +597,9 @@ sub push_email_address {
     }
 
     if (!$email_remove_duplicates) {
-	push(@email_to, format_email($name, $address));
+	push(@email_to, [format_email($name, $address), $role]);
     } elsif (!email_inuse($name, $address)) {
-	push(@email_to, format_email($name, $address));
+	push(@email_to, [format_email($name, $address), $role]);
 	$email_hash_name{$name}++;
 	$email_hash_address{$address}++;
     }
@@ -605,19 +608,19 @@ sub push_email_address {
 }
 
 sub push_email_addresses {
-    my ($address) = @_;
+    my ($address, $role) = @_;
 
     my @address_list = ();
 
     if (rfc822_valid($address)) {
-	push_email_address($address);
+	push_email_address($address, $role);
     } elsif (@address_list = rfc822_validlist($address)) {
 	my $array_count = shift(@address_list);
 	while (my $entry = shift(@address_list)) {
-	    push_email_address($entry);
+	    push_email_address($entry, $role);
 	}
     } else {
-	if (!push_email_address($address)) {
+	if (!push_email_address($address, $role)) {
 	    warn("Invalid MAINTAINERS address: '" . $address . "'\n");
 	}
     }
@@ -714,7 +717,7 @@ sub recent_git_signoffs {
 	last if ($sign_offs < $email_git_min_signatures ||
 		 $count > $email_git_max_maintainers ||
 		 $sign_offs * 100 / $total_sign_offs < $email_git_min_percent);
-	push_email_address($line);
+	push_email_address($line, 'signed-off');
     }
 }
 
@@ -795,7 +798,7 @@ sub git_assign_blame {
 	last if ($sign_offs < $email_git_min_signatures ||
 		 $count > $email_git_max_maintainers ||
 		 $sign_offs * 100 / $total_sign_offs < $email_git_min_percent);
-	push_email_address($line);
+	push_email_address($line, 'blamed');
     }
 }
 
@@ -816,6 +819,25 @@ sub sort_and_uniq {
     return @parms;
 }
 
+sub merge_email {
+    my @lines;
+    my %saw;
+
+    for (@_) {
+	my ($address, $role) = @$_;
+	if (!$saw{$address}) {
+	    if ($output_roles) {
+		push @lines, "$address ($role)";
+	    } else {
+		push @lines, $address;
+	    }
+	    $saw{$address} = 1;
+	}
+    }
+
+    return @lines;
+}
+
 sub output {
     my @parms = @_;
 
-- 
1.6.4.3