All build logs calls now pass the build through as part of the context so this gets recorded in the log message.

PHPCI/Builder.php

@@ -246,6 +246,11 @@ class Builder implements LoggerAwareInterface
         if (!is_array($message)) {
             $message = array($message);
         }
+
+        // The build is added to the context so the logger can use
+        // details from it if required.
+        $context['build'] = $this;
+
         foreach ($message as $item) {
             $this->logger->log($level, $item, $context);
         }

PHPCI/Helper/LoggedBuildContextTidier.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace PHPCI\Helper;
+
+
+class LoggedBuildContextTidier{
+
+    function __invoke()
+    {
+        return $this->tidyLoggedBuildContext(func_get_arg(0));
+    }
+
+    /**
+     * Removes the build object from the logged record and adds the ID as
+     * this is more useful to display.
+     *
+     * @param array $logRecord
+     * @return array
+     */
+    protected function tidyLoggedBuildContext(array $logRecord)
+    {
+        if (isset($logRecord['context']['build'])) {
+            $build = $logRecord['context']['build'];
+            if ($build instanceof Build) {
+                $logRecord['context']['buildID'] = $build->getId();
+                unset($logRecord['context']['build']);
+            }
+        }
+        return $logRecord;
+    }
+}