Call buildFinished when a cached build is added

Signed-off-by: Shea Levy <shea@shealevy.com>

src/lib/Hydra/Helper/PluginHooks.pm

@@ -0,0 +1,22 @@
+package Hydra::Helper::PluginHooks;
+
+use strict;
+use Exporter;
+
+our @ISA = qw(Exporter);
+our @EXPORT = qw(
+    notifyBuildFinished);
+
+sub notifyBuildFinished {
+    my ($plugins, $build, $dependents) = @_;
+    foreach my $plugin (@{$plugins}) {
+        eval {
+            $plugin->buildFinished($build, $dependents);
+        };
+        if ($@) {
+            print STDERR "$plugin->buildFinished: $@\n";
+        }
+    }
+}
+
+1;