Don't barf by trying to make roles mutable.

[catagits/Catalyst-Runtime.git] / lib / Catalyst / Engine / HTTP / Restarter / Watcher.pm

diff --git a/lib/Catalyst/Engine/HTTP/Restarter/Watcher.pm b/lib/Catalyst/Engine/HTTP/Restarter/Watcher.pm
index 3690877..6aada3e 100644 (file)
--- a/lib/Catalyst/Engine/HTTP/Restarter/Watcher.pm
+++ b/lib/Catalyst/Engine/HTTP/Restarter/Watcher.pm
@@ -141,8 +141,10 @@ sub _test {
         $id = B::Hooks::OP::Check::StashChange::register(sub {
             my ($new, $old) = @_;
             my $meta = find_meta($new);
-            if ($meta) {
-                $meta->make_mutable if $meta->is_immutable;
+            if ($meta) { # A little paranoia here - Moose::Meta::Role has neither of these methods.
+                my $is_immutable = $meta->can('is_immutable');
+                my $make_mutable = $meta->can('make_mutable');
+                $meta->$make_mutable() if $is_immutable && $make_mutable && $meta->$is_immutable();
             }
         });
     }
@@ -197,6 +199,17 @@ Creates a new Watcher object.
 Returns a list of files that have been added, deleted, or changed since the
 last time watch was called.
 
+=head2 DETECT_PACKAGE_COMPILATION
+
+Returns true if L<B::Hooks::OP::Check::StashChange> is installed and
+can be used to detect when files are compiled. This is used internally
+to make the L<Moose> metaclass of any class being reloaded immutable.
+
+If L<B::Hooks::OP::Check::StashChange> is not installed, then the
+restarter makes all application components immutable. This covers the
+simple case, but is less useful if you're using Moose in components
+outside Catalyst's namespaces, but inside your application directory.
+
 =head1 SEE ALSO
 
 L<Catalyst>, L<Catalyst::Engine::HTTP::Restarter>, L<File::Modified>