From 357f0572d12ed3aeed458805ca2b3424a5cd9ff0 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Sat, 2 Mar 2013 20:18:38 +0100
Subject: [PATCH] Only print ignoring warning when a package is not installed
 and not required by the root package, fixes #1642

---
 src/Composer/Installer.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Composer/Installer.php b/src/Composer/Installer.php
index 9bbd6fee9..ac7838537 100644
--- a/src/Composer/Installer.php
+++ b/src/Composer/Installer.php
@@ -653,6 +653,11 @@ class Installer
             return;
         }
 
+        $requiredPackageNames = array();
+        foreach (array_merge($rootRequires, $rootDevRequires) as $require) {
+            $requiredPackageNames[] = $require->getTarget();
+        }
+
         if ($devMode) {
             $rootRequires = array_merge($rootRequires, $rootDevRequires);
         }
@@ -671,7 +676,7 @@ class Installer
             $packageQueue = new \SplQueue;
 
             $depPackages = $pool->whatProvides($packageName);
-            if (count($depPackages) == 0) {
+            if (count($depPackages) == 0 && !in_array($packageName, $requiredPackageNames)) {
                 $this->io->write('<warning>Package "' . $packageName . '" listed for update is not installed. Ignoring.<warning>');
             }