Removed some 3 year old backward compatibility code.

src/Composer/Installer.php

@@ -175,21 +175,6 @@ class Installer
             $this->mockLocalRepositories($this->repositoryManager);
         }
 
-        // TODO remove this BC feature at some point
-        // purge old require-dev packages to avoid conflicts with the new way of handling dev requirements
-        $devRepo = new InstalledFilesystemRepository(new JsonFile($this->config->get('vendor-dir').'/composer/installed_dev.json'));
-        if ($devRepo->getPackages()) {
-            $this->io->writeError('<warning>BC Notice: Removing old dev packages to migrate to the new require-dev handling.</warning>');
-            foreach ($devRepo->getPackages() as $package) {
-                if ($this->installationManager->isPackageInstalled($devRepo, $package)) {
-                    $this->installationManager->uninstall($devRepo, new UninstallOperation($package));
-                }
-            }
-            unlink($this->config->get('vendor-dir').'/composer/installed_dev.json');
-        }
-        unset($devRepo, $package);
-        // end BC
-
         if ($this->runScripts) {
             // dispatch pre event
             $eventName = $this->update ? ScriptEvents::PRE_UPDATE_CMD : ScriptEvents::PRE_INSTALL_CMD;

src/Composer/Installer/LibraryInstaller.php

@@ -153,7 +153,7 @@ class LibraryInstaller implements InstallerInterface
     /**
      * Returns the base path of the package without target-dir path
      *
-     * It is used for BC as getInstallPath tends to be overriden by
+     * It is used for BC as getInstallPath tends to be overridden by
      * installer plugins but not getPackageBasePath
      *
      * @param  PackageInterface $package

src/Composer/Repository/ComposerRepository.php

@@ -236,13 +236,7 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
             return array_keys($this->providerListing);
         }
 
-        // BC handling for old providers-includes
-        $providers = array();
-        foreach (array_keys($this->providerListing) as $provider) {
-            $providers[] = substr($provider, 2, -5);
-        }
-
-        return $providers;
+        return array();
     }
 
     protected function configurePackageTransportOptions(PackageInterface $package)
@@ -304,15 +298,7 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
             $url = str_replace(array('%package%', '%hash%'), array($name, $hash), $this->providersUrl);
             $cacheKey = 'provider-'.strtr($name, '/', '$').'.json';
         } else {
-            // BC handling for old providers-includes
-            $url = 'p/'.$name.'.json';
-
-            // package does not exist in this repo
-            if (!isset($this->providerListing[$url])) {
-                return array();
-            }
-            $hash = $this->providerListing[$url]['sha256'];
-            $cacheKey = null;
+            return array();
         }
 
         $packages = null;
@@ -459,9 +445,6 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
 
         if (!empty($data['notify-batch'])) {
             $this->notifyUrl = $this->canonicalizeUrl($data['notify-batch']);
-        } elseif (!empty($data['notify_batch'])) {
-            // TODO remove this BC notify_batch support
-            $this->notifyUrl = $this->canonicalizeUrl($data['notify_batch']);
         } elseif (!empty($data['notify'])) {
             $this->notifyUrl = $this->canonicalizeUrl($data['notify']);
         }
@@ -557,18 +540,6 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
                     $includedData = $this->fetchFile($url, $cacheKey, $metadata['sha256']);
                 }
 
-                $this->loadProviderListings($includedData);
-            }
-        } elseif (isset($data['providers-includes'])) {
-            // BC layer for old-style providers-includes
-            $includes = $data['providers-includes'];
-            foreach ($includes as $include => $metadata) {
-                if ($this->cache->sha256($include) === $metadata['sha256']) {
-                    $includedData = json_decode($this->cache->read($include), true);
-                } else {
-                    $includedData = $this->fetchFile($include, null, $metadata['sha256']);
-                }
-
                 $this->loadProviderListings($includedData);
             }
         }