IMT-109 / DDST-536: Suppress writability

src/Plugin/migrate/source/Foxml.php

@@ -106,7 +106,7 @@ protected function generateIds() : \Traversable {
    */
   protected function generatePaths() : \Traversable {
     foreach ($this->generateIds() as $id) {
-      yield $id => $this->objectStorage->dereference($id);
+      yield $id => "foxml://object/{$id}";
     }
   }
 

src/StreamWrapper/Foxml.php

@@ -14,6 +14,8 @@
  */
 class Foxml extends LocalReadOnlyStream {
 
+  use NotWritableTrait;
+
   /**
    * The datastream low-level adapter manager service.
    *
@@ -133,4 +135,19 @@ public function getDescription() {
     return 'FOXML object/datastream storage dereferencing.';
   }
 
+  /**
+   * {@inheritDoc}
+   * phpcs:disable Drupal.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
+   */
+  public function url_stat($uri, $flags) {
+    return static::applyMask(parent::url_stat($uri, $flags));
+  }
+
+  /**
+   * {@inheritDoc}
+   */
+  public function stream_stat() {
+    return static::applyMask(parent::stream_stat());
+  } // phpcs:enable Drupal.NamingConventions.ValidFunctionName.ScopeNotCamelCaps
+
 }

src/StreamWrapper/NotWritableTrait.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Drupal\foxml\StreamWrapper;
+
+/**
+ * Helper trait to mask writability from file modes.
+ */
+trait NotWritableTrait {
+
+  /**
+   * Apply mask to suppress writability being reported.
+   *
+   * @param array|false $result
+   *   The stat() result in which to mask the mode.
+   *
+   * @return array|false
+   *   The masked stat() result.
+   */
+  protected static function applyMask(array|false $result) : array|false {
+    if (!$result) {
+      return FALSE;
+    }
+
+    $result[2] = ($result['mode'] &= ~0o222);
+
+    return $result;
+  }
+
+}

src/StreamWrapper/Substream.php

@@ -14,6 +14,8 @@
 class Substream extends ReadOnlyStream {
   const SCHEME = 'foxml.substream';
 
+  use NotWritableTrait;
+
   /**
    * The target resource from which to extract the substream.
    *
@@ -202,7 +204,7 @@ public function stream_tell() {
    * {@inheritdoc}
    */
   public function stream_stat() {
-    return fstat($this->proxy);
+    return static::applyMask(fstat($this->proxy));
   }
 
   /**
@@ -260,7 +262,7 @@ public function url_stat($path, $flags) {
     $target_stat = stat($target);
 
     if ($target_stat) {
-      return $stat + $target_stat;
+      return static::applyMask($stat + $target_stat);
     }
     else {
       throw new \Exception(strtr('Failed to stat target !file for !path', [