config improvements

diff --git a/mr b/mr
index 06829d2c9abaaddcdab5861cfadb6888c76ee8f5..59aab5ad845e498f69e22be6a6aba655f0832f82 100755 (executable)
--- a/mr
+++ b/mr
@@ -86,16 +86,19 @@ directory to register.
 
 =item config
 
-Adds, modifies, removed, or prints a value from the mrconfig file. The next
-parameter is the name of the section the value is in. To add or modify a
-value, follow it by one or more instances of "parameter=value". Use
-"parameter=" to remove a parameter. Use just "parameter" to get the value
-of a parameter.
+Adds, modifies, removes, or prints a value from the mrconfig file. The next
+parameter is the name of the section the value is in. To add or modify
+values, use one or more instances of "parameter=value". Use "parameter=" to
+remove a parameter. Use just "parameter" to get the value of a parameter.
 
 For example, to add (or edit) a repository in src/foo:
 
   mr config src/foo checkout="svn co svn://example.com/foo/trunk foo"
 
+To show the command that mr uses to update the repository in src/foo:
+
+  mr config src/foo update
+
 =item help
 
 Displays this help.
@@ -299,12 +302,17 @@ elsif ($action eq 'config') {
                        $changefields{$1}=$2;
                }
                else {
+                       my $found=0;
                        foreach my $topdir (sort keys %config) {
                                if (exists $config{$topdir}{$section} &&
                                    exists $config{$topdir}{$section}{$_}) {
                                        print $config{$topdir}{$section}{$_}."\n";
+                                       $found=1;
                                }
                        }
+                       if (! $found) {
+                               die "mr $action: $section $_ not set\n";
+                       }
                }
        }
        modifyconfig($config, $section, %changefields) if %changefields;