composeer update

vendor/vlucas/phpdotenv/src/Environment/AbstractVariables.php

@@ -2,6 +2,9 @@
 
 namespace Dotenv\Environment;
 
+use Dotenv\Environment\Adapter\ArrayAdapter;
+use InvalidArgumentException;
+
 /**
  * This is the abstract variables implementation.
  *
@@ -16,6 +19,13 @@ abstract class AbstractVariables implements VariablesInterface
      */
     private $immutable;
 
+    /**
+     * The record of loaded variables.
+     *
+     * @var \Dotenv\Environment\Adapter\ArrayAdapter
+     */
+    private $loaded;
+
     /**
      * Create a new environment variables instance.
      *
@@ -26,8 +36,104 @@ abstract class AbstractVariables implements VariablesInterface
     public function __construct($immutable)
     {
         $this->immutable = $immutable;
+        $this->loaded = new ArrayAdapter();
     }
 
+    /**
+     * Get an environment variable.
+     *
+     * @param string $name
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return string|null
+     */
+    public function get($name)
+    {
+        if (!is_string($name)) {
+            throw new InvalidArgumentException('Expected name to be a string.');
+        }
+
+        return $this->getInternal($name);
+    }
+
+    /**
+     * Get an environment variable.
+     *
+     * @param string $name
+     *
+     * @return string|null
+     */
+    protected abstract function getInternal($name);
+
+    /**
+     * Set an environment variable.
+     *
+     * @param string      $name
+     * @param string|null $value
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return void
+     */
+    public function set($name, $value = null)
+    {
+        if (!is_string($name)) {
+            throw new InvalidArgumentException('Expected name to be a string.');
+        }
+
+        // Don't overwrite existing environment variables if we're immutable
+        // Ruby's dotenv does this with `ENV[key] ||= value`.
+        if ($this->isImmutable() && $this->get($name) !== null && $this->loaded->get($name)->isEmpty()) {
+            return;
+        }
+
+        $this->setInternal($name, $value);
+        $this->loaded->set($name, '');
+    }
+
+    /**
+     * Set an environment variable.
+     *
+     * @param string      $name
+     * @param string|null $value
+     *
+     * @return void
+     */
+    protected abstract function setInternal($name, $value = null);
+
+    /**
+     * Clear an environment variable.
+     *
+     * @param string $name
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return void
+     */
+    public function clear($name)
+    {
+        if (!is_string($name)) {
+            throw new InvalidArgumentException('Expected name to be a string.');
+        }
+
+        // Don't clear anything if we're immutable.
+        if ($this->isImmutable()) {
+            return;
+        }
+
+        $this->clearInternal($name);
+    }
+
+    /**
+     * Clear an environment variable.
+     *
+     * @param string $name
+     *
+     * @return void
+     */
+    protected abstract function clearInternal($name);
+
     /**
      * Determine if the environment is immutable.
      *