Added sort-packages into config

src/Composer/Command/ConfigCommand.php

@@ -322,6 +322,7 @@ EOT
                 },
             ),
             'autoloader-suffix' => array('is_string', function ($val) { return $val === 'null' ? null : $val; }),
+            'sort-packages' => array($booleanValidator, $booleanNormalizer),
             'optimize-autoloader' => array($booleanValidator, $booleanNormalizer),
             'classmap-authoritative' => array($booleanValidator, $booleanNormalizer),
             'prepend-autoloader' => array($booleanValidator, $booleanNormalizer),

src/Composer/Command/RequireCommand.php

@@ -117,7 +117,7 @@ EOT
             $versionParser->parseConstraints($constraint);
         }
 
-        $sortPackages = $input->getOption('sort-packages');
+        $sortPackages = $input->getOption('sort-packages') || $composer->getConfig()->get('sort-packages');
 
         if (!$this->updateFileCleanly($json, $baseRequirements, $requirements, $requireKey, $removeKey, $sortPackages)) {
             foreach ($requirements as $package => $version) {

src/Composer/Config.php

@@ -39,6 +39,7 @@ class Config
         'bin-compat' => 'auto',
         'discard-changes' => false,
         'autoloader-suffix' => null,
+        'sort-packages' => false,
         'optimize-autoloader' => false,
         'classmap-authoritative' => false,
         'prepend-autoloader' => true,