Connects to #1711: Adding config:get and config:dump commmands. (#1714)

* Connects to #1711: Adding config:get and config:dump commmands.

* Executing config:dump during CI.

scripts/blt/ci/internal/create_blt_project.sh

@@ -55,4 +55,7 @@ sed -i "s:deploy_updates:deploy_install:g" hooks/common/post-code-update/post-co
 # Create example command and hook files.
 blt examples:init
 
+# Dump all config values.
+blt config:dump
+
 set +v

src/Robo/Commands/Blt/ConfigCommand.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Acquia\Blt\Robo\Commands\Blt;
+
+use Acquia\Blt\Robo\BltTasks;
+use Acquia\Blt\Robo\Exceptions\BltException;
+
+/**
+ * Defines commands in the 'config:*' namespace.
+ */
+class ConfigCommand extends BltTasks {
+
+  /**
+   * Gets the value of a config variable.
+   *
+   * @command config:get
+   *
+   * @param string $key The key for the configuration item to get.
+   *
+   * @throws \Acquia\Blt\Robo\Exceptions\BltException
+   */
+  public function getValue($key) {
+    if (!$this->getConfig()->has($key)) {
+      throw new BltException("$key is not set.");
+    }
+
+    $this->say($this->getConfigValue($key));
+  }
+
+  /**
+   * Dumps all configuration values.
+   *
+   * @command config:dump
+   */
+  public function dump() {
+    $config = $this->getConfig()->export();
+    $this->printArrayAsTable($config);
+  }
+
+}