Local composer should take precedence over global composer (#2371)

Co-authored-by: Luca Passini <l.passini@melazeta.com>

Author: lukepass

recipe/deploy/vendors.php

@@ -10,14 +10,14 @@
 // composer version to `.dep/composer.phar`. To use specific composer version
 // download desired phar and place it at `.dep/composer.phar`.
 set('bin/composer', function () {
-    if (commandExist('composer')) {
-        return '{{bin/php}} ' . locateBinaryPath('composer');
-    }
-
     if (test('[ -f {{deploy_path}}/.dep/composer.phar ]')) {
         return '{{bin/php}} {{deploy_path}}/.dep/composer.phar';
     }
 
+    if (commandExist('composer')) {
+        return '{{bin/php}} ' . locateBinaryPath('composer');
+    }
+
     warning("Composer binary wasn't found. Installing latest composer to \"{{deploy_path}}/.dep/composer.phar\".");
     run("cd {{deploy_path}} && curl -sS https://getcomposer.org/installer | {{bin/php}}");
     run('mv {{deploy_path}}/composer.phar {{deploy_path}}/.dep/composer.phar');