Fix loading files for plugins/scripts (#10279)

src/Composer/Autoload/AutoloadGenerator.php

@@ -621,12 +621,6 @@ EOF;
             }
         }
 
-        if (isset($autoloads['files'])) {
-            foreach ($autoloads['files'] as $fileIdentifier => $file) {
-                composerRequire($fileIdentifier, $file);
-            }
-        }
-
         return $loader;
     }
 

src/Composer/EventDispatcher/EventDispatcher.php

@@ -508,6 +508,12 @@ class EventDispatcher
         $this->loader = $generator->createLoader($map, $this->composer->getConfig()->get('vendor-dir'));
         $this->loader->register(false);
 
+        if (isset($map['files'])) {
+            foreach ($map['files'] as $fileIdentifier => $file) {
+                \Composer\Autoload\composerRequire($fileIdentifier, $file);
+            }
+        }
+
         return $scripts[$event->getName()];
     }
 

src/Composer/Plugin/PluginManager.php

@@ -201,6 +201,12 @@ class PluginManager
         $classLoader = $generator->createLoader($map, $this->composer->getConfig()->get('vendor-dir'));
         $classLoader->register(false);
 
+        if (isset($map['files'])) {
+            foreach ($map['files'] as $fileIdentifier => $file) {
+                \Composer\Autoload\composerRequire($fileIdentifier, $file);
+            }
+        }
+
         foreach ($classes as $class) {
             if (class_exists($class, false)) {
                 $class = trim($class, '\\');