From 2de2e953c0dda6af8f02ff1505a133918f7fe458 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Wed, 21 Nov 2012 17:40:57 +0100
Subject: [PATCH] Add warning for outdated lock file since they cause massive
 slowdowns

---
 src/Composer/Installer.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Composer/Installer.php b/src/Composer/Installer.php
index 5175105ed..b828836bc 100644
--- a/src/Composer/Installer.php
+++ b/src/Composer/Installer.php
@@ -291,6 +291,10 @@ class Installer
         } elseif ($installFromLock) {
             $this->io->write('<info>Installing '.($devMode ? 'dev ': '').'dependencies from lock file</info>');
 
+            if (!$this->locker->isCompleteFormat($devMode)) {
+                $this->io->write('<warning>Warning: Your lock file is in a deprecated format. It will most likely take a *long* time for composer to install dependencies, and may cause dependency solving issues.</warning>');
+            }
+
             if (!$this->locker->isFresh() && !$devMode) {
                 $this->io->write('<warning>Warning: The lock file is not up to date with the latest changes in composer.json, you may be getting outdated dependencies, run update to update them.</warning>');
             }