Improve projectname determination

Provide access to option values of this plugin to other plugins

src/Handler.php

@@ -16,6 +16,11 @@ use Symfony\Component\Yaml\Yaml;
  */
 class Handler extends BaseHandler {
 
+  /**
+   * @var array
+   */
+  protected $options;
+
   /**
    * Configure Drupal Project for Docker.
    *
@@ -189,93 +194,104 @@ class Handler extends BaseHandler {
   /**
    * Retrieve options from composer.json "extra" configuration.
    *
+   * @param null $key
+   *   Optional name of an option to be received instead of the full set of options.
+   *
    * @return array
    *   The options.
    */
-  protected function getOptions() {
-    $projectname = str_replace([' ', '-', '_', '.'], '', basename(getcwd()));
-    $env = new Dotenv('docker4drupal', $this->io);
-    $env->put('COMPOSE_PROJECT_NAME', $projectname);
-    $extra = $this->composer->getPackage()->getExtra() + ['docker4drupal' => []];
-    $options = NestedArray::mergeDeep([
-      'projectname' => $projectname,
-      'docker0' => [
-        'ip' => $this->getLocalIpv4('docker0'),
-      ],
-      'live' => [
-        'root' => '',
-        'uri' => '',
-        'host' => '',
-        'user' => $env->receive('live_host_username', 'Remote username for host of the live site', getenv('USER')),
-      ],
-      'drush' => [
-        'sql' => [
-          'tables' => [
-            'structure' => [
-              'cache',
-              'cache_*',
-              'history',
-              'search_*',
-              'sessions',
-              'watchdog',
-            ],
-            'skip' => [
-              'migration_*',
+  public function getOptions($key = NULL) {
+    if ($this->options === NULL) {
+      $env = new Dotenv('docker4drupal', $this->io);
+      $projectname = getenv('COMPOSE_PROJECT_NAME');
+      if (empty($projectname)) {$projectname = str_replace([' ', '-', '_', '.'], '', basename(getcwd()));
+        $env->put('COMPOSE_PROJECT_NAME', $projectname);
+      }
+      $extra = $this->composer->getPackage()->getExtra() + ['docker4drupal' => []];
+      $options = NestedArray::mergeDeep([
+        'projectname' => $projectname,
+        'docker0' => [
+          'ip' => $this->getLocalIpv4('docker0'),
+        ],
+        'live' => [
+          'root' => '',
+          'uri' => '',
+          'host' => '',
+          'user' => $env->receive('live_host_username', 'Remote username for host of the live site', getenv('USER')),
+        ],
+        'drush' => [
+          'sql' => [
+            'tables' => [
+              'structure' => [
+                'cache',
+                'cache_*',
+                'history',
+                'search_*',
+                'sessions',
+                'watchdog',
+              ],
+              'skip' => [
+                'migration_*',
+              ],
             ],
           ],
         ],
-      ],
-      'drupal' => [
-        'version' => '8',
-      ],
-      'php' => [
-        'version' => '7.0',
-        'xdebug' => 1,
-      ],
-      'webserver' => [
-        'type' => 'apache',
-      ],
-      'varnish' => [
-        'enable' => 0,
-      ],
-      'redis' => [
-        'version' => '4.0',
-      ],
-      'dbbrowser' => [
-        'type' => 'pma',
-      ],
-      'solr' => [
-        'enable' => 0,
-        'version' => '6.6',
-      ],
-      'node' => [
-        'enable' => 0,
-        'key' => '',
-        'path' => '',
-      ],
-      'memcached' => [
-        'enable' => 0,
-      ],
-      'rsyslog' => [
-        'enable' => 0,
-      ],
-      'athenapdf' => [
-        'enable' => 0,
-        'key' => '',
-      ],
-      'blackfire' => [
-        'enable' => 0,
-        'id' => '',
-        'token' => '',
-      ],
-      'webgrind' => [
-        'enable' => 0,
-      ],
-      'wkhtmltox' => [
-        'enable' => 0,
-      ],
-    ], $extra['docker4drupal']);
-    return $env->replaceEnvironmentVariables($options);
+        'drupal' => [
+          'version' => '8',
+        ],
+        'php' => [
+          'version' => '7.0',
+          'xdebug' => 1,
+        ],
+        'webserver' => [
+          'type' => 'apache',
+        ],
+        'varnish' => [
+          'enable' => 0,
+        ],
+        'redis' => [
+          'version' => '4.0',
+        ],
+        'dbbrowser' => [
+          'type' => 'pma',
+        ],
+        'solr' => [
+          'enable' => 0,
+          'version' => '6.6',
+        ],
+        'node' => [
+          'enable' => 0,
+          'key' => '',
+          'path' => '',
+        ],
+        'memcached' => [
+          'enable' => 0,
+        ],
+        'rsyslog' => [
+          'enable' => 0,
+        ],
+        'athenapdf' => [
+          'enable' => 0,
+          'key' => '',
+        ],
+        'blackfire' => [
+          'enable' => 0,
+          'id' => '',
+          'token' => '',
+        ],
+        'webgrind' => [
+          'enable' => 0,
+        ],
+        'wkhtmltox' => [
+          'enable' => 0,
+        ],
+      ], $extra['docker4drupal']);
+      $this->options = $env->replaceEnvironmentVariables($options);
+    }
+    if ($key !== NULL) {
+      return $this->options[$key];
+    }
+    return $this->options;
   }
 
   /**