add support for getting config settings

diff --git a/mr b/mr
index b65e623f09192d7703d883190e335e7662463f5e..db209d27c38409b4dfdc09ba93cb7e85a96bbc00 100755 (executable)
--- a/mr
+++ b/mr
@@ -86,9 +86,11 @@ directory to register.
 
 =item config
 
-Modifies the mrconfig file. The next parameter is the name of the section
-to add or modify, and it is followed by one or more instances of
-"parameter=value". Use "parameter=" to remove a parameter. 
+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.
 
 For example, to add (or edit) a repository in src/foo:
 
@@ -282,16 +284,21 @@ elsif ($action eq 'config') {
                        $section=$1;
                }
        }
-       my %fields;
+       my %changefields;
        foreach (@ARGV) {
                if (/^([^=]+)=(.*)$/) {
-                       $fields{$1}=$2;
+                       $changefields{$1}=$2;
                }
                else {
-                       die "mr config: expected parameter=value, not \"$_\"\n";
+                       foreach my $topdir (sort keys %config) {
+                               if (exists $config{$topdir}{$section} &&
+                                   exists $config{$topdir}{$section}{$_}) {
+                                       print $config{$topdir}{$section}{$_}."\n";
+                               }
+                       }
                }
        }
-       modifyconfig($config, $section, %fields);
+       modifyconfig($config, $section, %changefields) if %changefields;
        exit 0;
 }
 elsif ($action eq 'register') {