Obtain environment variables

Mage/Task/AbstractTask.php

@@ -307,4 +307,53 @@ abstract class AbstractTask
         }
         return $result;
     }
+
+    /**
+     * Returns the array of environment variables
+     * Returned array contains both system variables and variables set in config
+     * WARNING: To access system's variables you need to set proper value in your php.ini at variables_order key
+     * @see http://php.net/manual/en/ini.core.php#ini.variables-order
+     *
+     * @return array
+     */
+    protected function getEnvVariables()
+    {
+        $configVars = array_merge(
+            $this->getConfig()->general('env', []),
+            $this->getConfig()->environmentConfig('env', []),
+            $this->getConfig()->getParameter('env', [])
+        );
+
+        if (isset($configVars['variables'])) {
+            $configVars = $configVars['variables'];
+        }
+
+        $envVariables = array_merge(
+            $_ENV,
+            $configVars
+        );
+
+        return $envVariables;
+    }
+
+    /**
+     * Returns ready to inject environment string
+     * The string is build from env vars array in schema:
+     *  key1=value1 key2=value3 ...
+     *
+     * @return string
+     */
+    protected function getEnvVarsString()
+    {
+        $envVarsArray = $this->getEnvVariables();
+        $envVars = array_map(
+            function ($key, $value) {
+                return "$key=$value";
+            },
+            array_keys($envVarsArray),
+            $this->getEnvVariables()
+        );
+
+        return join(' ', $envVars);
+    }
 }