X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FCatalyst%2FUtils.pm;h=c6710b24be234146761227eb73b6b2d10eefa169;hb=f9b6d6122c224d2a46e1bcc4f0c98b16d0db21ce;hp=3a0974b2088c414aa43cdab0cdb873e3fea8efd7;hpb=a88c7ec8a3a92fdf966dce0026d06082a10c7714;p=catagits%2FCatalyst-Runtime.git

diff --git a/lib/Catalyst/Utils.pm b/lib/Catalyst/Utils.pm
index 3a0974b..c6710b2 100644
--- a/lib/Catalyst/Utils.pm
+++ b/lib/Catalyst/Utils.pm
@@ -6,6 +6,7 @@ use File::Spec;
 use HTTP::Request;
 use Path::Class;
 use URI;
+use Class::Inspector;
 
 =head1 NAME
 
@@ -210,9 +211,65 @@ sub request {
     return $request;
 }
 
+=head2 ensure_class_loaded($class_name)
+
+Loads the class unless it already has been loaded.
+
+=cut
+
+sub ensure_class_loaded {
+    my $class = shift;
+
+    return if Class::Inspector->loaded( $class ); # if a symbol entry exists we don't load again
+
+    # this hack is so we don't overwrite $@ if the load did not generate an error
+    my $error;
+    {
+        local $@;
+        eval "require $class";
+        $error = $@;
+    }
+
+    die $error if $error;
+    die "require $class was successful but the package is not defined"
+        unless Class::Inspector->loaded($class);
+
+    return 1;
+}
+
+=head2 merge_hashes($hashref, $hashref)
+
+Base code to recursively merge two hashes together with right-hand precedence.
+
+=cut
+
+sub merge_hashes {
+    my ( $lefthash, $righthash ) = @_;
+
+    return $lefthash unless defined $righthash;
+    
+    my %merged = %$lefthash;
+    for my $key ( keys %$righthash ) {
+        my $right_ref = ( ref $righthash->{ $key } || '' ) eq 'HASH';
+        my $left_ref  = ( ( exists $lefthash->{ $key } && ref $lefthash->{ $key } ) || '' ) eq 'HASH';
+        if( $right_ref and $left_ref ) {
+            $merged{ $key } = merge_hashes(
+                $lefthash->{ $key }, $righthash->{ $key }
+            );
+        }
+        else {
+            $merged{ $key } = $righthash->{ $key };
+        }
+    }
+    
+    return \%merged;
+}
+
+
 =head1 AUTHOR
 
 Sebastian Riedel, C<sri@cpan.org>
+Yuval Kogman, C<nothingmuch@woobling.org>
 
 =head1 COPYRIGHT