init commit

vendor/topthink/think-installer/src/LibraryInstaller.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace think\composer;
+
+use Composer\Package\PackageInterface;
+use Composer\Repository\InstalledRepositoryInterface;
+use React\Promise\PromiseInterface;
+
+abstract class LibraryInstaller extends \Composer\Installer\LibraryInstaller
+{
+    public function install(InstalledRepositoryInterface $repo, PackageInterface $package)
+    {
+        return $this->makePromise(parent::install($repo, $package));
+    }
+
+    public function update(InstalledRepositoryInterface $repo, PackageInterface $initial, PackageInterface $target)
+    {
+        return $this->makePromise(parent::update($repo, $initial, $target));
+    }
+
+    protected function makePromise($promise)
+    {
+        if ($promise instanceof PromiseInterface) {
+            return $promise;
+        }
+        return new Promise();
+    }
+}