From e0f800c0ebeed4d15a1305f4e82285c88a91e9f1 Mon Sep 17 00:00:00 2001
From: teppokoivula <teppo.koivula@gmail.com>
Date: Wed, 9 Dec 2020 20:51:16 +0200
Subject: [PATCH 1/3] Composer 2.0 support

---
 CHANGELOG.md                     |  5 +++++
 composer.json                    |  5 +++--
 src/ComposerInstaller/Plugin.php | 26 ++++++++++++++++++++++++++
 3 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 45882ef..803ed4d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.1.0] - 2020-12-09
+
+### Added
+- Support for Composer 2.0.
+
 ## [1.0.4] - 2020-10-20
 
 ### Changed
diff --git a/composer.json b/composer.json
index 63ed62a..a22ab54 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         }
     ],
     "require": {
-        "composer-plugin-api": "^1.0",
+        "composer-plugin-api": "^1.0 || ^2.0",
         "hari/pw-module": "^1.0.0"
     },
     "autoload": {
@@ -22,6 +22,7 @@
         }
     },
     "extra": {
-        "class": "wireframe\\ComposerInstaller\\Plugin"
+        "class": "wireframe\\ComposerInstaller\\Plugin",
+        "branch-version": "1.1.0"
     }
 }
diff --git a/src/ComposerInstaller/Plugin.php b/src/ComposerInstaller/Plugin.php
index 0a66701..0a8b6c9 100644
--- a/src/ComposerInstaller/Plugin.php
+++ b/src/ComposerInstaller/Plugin.php
@@ -65,4 +65,30 @@ public static function prePackageInstall(PackageEvent $event)
             $installationManager->removeInstaller($moduleInstaller);
         }
     }
+
+   /**
+    * Remove any hooks from Composer
+    *
+    * This will be called when a plugin is deactivated before being uninstalled, but also before it
+    * gets upgraded to a new version so the old one can be deactivated and the new one activated.
+    *
+    * @param Composer $composer
+    * @param IOInterface $io
+    */
+    public function deactivate(Composer $composer, IOInterface $io)
+    {
+    }
+
+   /**
+    * Prepare the plugin to be uninstalled
+    *
+    * This will be called after deactivate.
+    *
+    * @param Composer    $composer
+    * @param IOInterface $io
+    */
+    public function uninstall(Composer $composer, IOInterface $io)
+    {
+    }
+
 }

From d20c10c97c05c46c8a5f320edb195b0631f03c20 Mon Sep 17 00:00:00 2001
From: teppokoivula <teppo.koivula@gmail.com>
Date: Wed, 9 Dec 2020 21:08:10 +0200
Subject: [PATCH 2/3] Remove temporary branch-version param

---
 composer.json | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/composer.json b/composer.json
index a22ab54..90631f2 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,6 @@
         }
     },
     "extra": {
-        "class": "wireframe\\ComposerInstaller\\Plugin",
-        "branch-version": "1.1.0"
+        "class": "wireframe\\ComposerInstaller\\Plugin"
     }
 }

From 12f2baec9941b1124af23d420e610ab9bcaeb551 Mon Sep 17 00:00:00 2001
From: teppokoivula <teppo.koivula@gmail.com>
Date: Wed, 9 Dec 2020 21:28:29 +0200
Subject: [PATCH 3/3] Add support for Composer v2 promises

---
 .../SiteProfileInstaller.php                  | 34 +++++++++++++------
 1 file changed, 23 insertions(+), 11 deletions(-)

diff --git a/src/ComposerInstaller/SiteProfileInstaller.php b/src/ComposerInstaller/SiteProfileInstaller.php
index c9c182b..b2bcefb 100644
--- a/src/ComposerInstaller/SiteProfileInstaller.php
+++ b/src/ComposerInstaller/SiteProfileInstaller.php
@@ -5,6 +5,7 @@
 use Composer\Repository\InstalledRepositoryInterface;
 use Composer\Package\PackageInterface;
 use Composer\Util\Filesystem;
+use React\Promise\PromiseInterface;
 
 /**
  * SiteProfileInstaller class
@@ -35,21 +36,32 @@ public function supports($packageType)
      */
     public function install(InstalledRepositoryInterface $repo, PackageInterface $package)
     {
-        parent::install($repo, $package);
-
         // check if there's a nested site- prefixed directory, in which case we
         // must assume that it's the real site profile directory and move it up
         // one level
-        $path = $this->getInstallPath($package);
-        $site = $this->getNestedSiteDirectoryName($path);
-        if ($site) {
-            $basePath = $this->getBasePath(static::BASE_PATH);
-            $tempPath = $basePath . 'temp-' . \basename($path);
-            $filesystem = new Filesystem();
-            $filesystem->rename($path, $tempPath);
-            $filesystem->rename($tempPath . '/' . $site, $basePath . $site);
-            $filesystem->remove($tempPath);
+        $adjustProfilePath = function() use ($package) {
+            $path = $this->getInstallPath($package);
+            $site = $this->getNestedSiteDirectoryName($path);
+            if ($site) {
+                $basePath = $this->getBasePath(static::BASE_PATH);
+                $tempPath = $basePath . 'temp-' . \basename($path);
+                $filesystem = new Filesystem();
+                $filesystem->rename($path, $tempPath);
+                $filesystem->rename($tempPath . '/' . $site, $basePath . $site);
+                $filesystem->remove($tempPath);
+            }
+        };
+
+        $promise = parent::install($repo, $package);
+
+        // Composer v2 might return a promise here
+        if ($promise instanceof PromiseInterface) {
+            return $promise->then($adjustProfilePath);
         }
+
+        // if not, execute the code right away as parent::install executed synchronously
+        // (composer v1, or v2 without async)
+        $adjustProfilePath();
     }
 
     /**