clean install

vendor/drupal/core-composer-scaffold/Operations/AbstractOperation.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace Drupal\Composer\Plugin\Scaffold\Operations;
+
+use Drupal\Composer\Plugin\Scaffold\ScaffoldFilePath;
+
+/**
+ * Provides default behaviors for operations.
+ *
+ * @internal
+ */
+abstract class AbstractOperation implements OperationInterface {
+
+  /**
+   * Cached contents of scaffold file to be written to disk.
+   *
+   * @var string
+   */
+  protected $contents;
+
+  /**
+   * {@inheritdoc}
+   */
+  final public function contents() {
+    if (!isset($this->contents)) {
+      $this->contents = $this->generateContents();
+    }
+    return $this->contents;
+  }
+
+  /**
+   * Load the scaffold contents or otherwise generate what is needed.
+   *
+   * @return string
+   *   The contents of the scaffold file.
+   */
+  abstract protected function generateContents();
+
+  /**
+   * {@inheritdoc}
+   */
+  public function scaffoldOverExistingTarget(OperationInterface $existing_target) {
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function scaffoldAtNewLocation(ScaffoldFilePath $destination) {
+    return $this;
+  }
+
+}