From a7765c2c9f92ae470209b4d8ba43e800ab42772e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Raimondas=20Rimkevi=C4=8Dius=20=28aka=20MekDrop=29?=
 <github@mekdrop.name>
Date: Fri, 6 Nov 2020 02:06:26 +0200
Subject: [PATCH] Adds possibility to define config not only in project extras
 but also in dependencies

---
 src/Config.php             | 37 ++++++++++++++++++++++++++++++++++---
 src/NodeComposerPlugin.php | 38 ++++++++++++++++++++++++++++++++++----
 2 files changed, 68 insertions(+), 7 deletions(-)

diff --git a/src/Config.php b/src/Config.php
index c6f00b5..84b677d 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -40,12 +40,43 @@ public static function fromArray(array $conf)
         $self->nodeDownloadUrl = isset($conf['node-download-url']) ? $conf['node-download-url'] : null;
         $self->yarnVersion = isset($conf['yarn-version']) ? $conf['yarn-version'] : null;
 
-        if ($self->nodeVersion === null) {
-            throw new NodeComposerConfigException('You must specify a node-version');
+        return $self;
+    }
+
+    /**
+     * Selects best config from configs list
+     *
+     * @param Config[] $configs
+     * @return Config
+     */
+    public static function selectBest(array $configs) {
+        $maxNodeVersion = null;
+        $maxYarnVersion = null;
+        $nodeDownloadUrl = null;
+        foreach ($configs as $config) {
+            if ($maxNodeVersion === null) {
+                $maxNodeVersion = $config->nodeVersion;
+            } elseif (version_compare($config->nodeVersion, $maxNodeVersion, '>')) {
+                $maxNodeVersion = $config->nodeVersion;
+            }
+            if ($maxYarnVersion === null) {
+                $maxYarnVersion = $config->yarnVersion;
+            } elseif (version_compare($config->yarnVersion, $maxYarnVersion, '>')) {
+                $maxYarnVersion = $config->yarnVersion;
+            }
+            if ($nodeDownloadUrl === null) {
+                $nodeDownloadUrl = $config->nodeDownloadUrl;
+            } elseif ($nodeDownloadUrl !== $config->nodeDownloadUrl) {
+                throw new NodeComposerConfigException('Defined different nodejs download urls are unsupported right now');
+            }
         }
 
+        $ret = new self();
+        $ret->nodeDownloadUrl = $nodeDownloadUrl;
+        $ret->yarnVersion = $maxYarnVersion;
+        $ret->nodeVersion = $maxNodeVersion;
 
-        return $self;
+        return $ret;
     }
 
     /**
diff --git a/src/NodeComposerPlugin.php b/src/NodeComposerPlugin.php
index 9a14e9e..cd38d0b 100644
--- a/src/NodeComposerPlugin.php
+++ b/src/NodeComposerPlugin.php
@@ -6,6 +6,7 @@
 use Composer\Composer;
 use Composer\EventDispatcher\EventSubscriberInterface;
 use Composer\IO\IOInterface;
+use Composer\Package\CompletePackage;
 use Composer\Plugin\PluginInterface;
 use Composer\Script\Event;
 use Composer\Script\ScriptEvents;
@@ -36,14 +37,15 @@ public function activate(Composer $composer, IOInterface $io)
     {
         $this->composer = $composer;
         $this->io = $io;
+        $this->config = $this->findBestConfig();
 
-        $extraConfig = $this->composer->getPackage()->getExtra();
-
-        if (!isset($extraConfig['mariusbuescher']['node-composer'])) {
+        if ($this->config === null) {
             throw new NodeComposerConfigException('You must configure the node composer plugin');
         }
 
-        $this->config = Config::fromArray($extraConfig['mariusbuescher']['node-composer']);
+        if ($this->config->getNodeVersion() === null) {
+            throw new NodeComposerConfigException('You must specify a node-version');
+        }
     }
 
     public static function getSubscribedEvents()
@@ -143,4 +145,32 @@ public function deactivate(Composer $composer, IOInterface $io)
     public function uninstall(Composer $composer, IOInterface $io)
     {
     }
+
+    /**
+     * Find best node config to use from all package tree
+     *
+     * @return Config|null
+     */
+    protected function findBestConfig() {
+        $extraConfig = $this->composer->getPackage()->getExtra();
+
+        if (isset($extraConfig['mariusbuescher']['node-composer'])) {
+            return Config::fromArray($extraConfig['mariusbuescher']['node-composer']);
+        }
+
+        $configs = [];
+        /**
+         * @var CompletePackage $package
+         */
+        foreach ($this->composer->getRepositoryManager()->getLocalRepository()->getPackages() as $package) {
+            $extraConfig = $package->getExtra();
+            if (isset($extraConfig['mariusbuescher']['node-composer'])) {
+                $config[] = Config::fromArray($extraConfig['mariusbuescher']['node-composer']);
+            }
+        }
+        if (empty($configs)) {
+            return null;
+        }
+        return Config::selectBest($configs);
+    }
 }