Build phar in root dir.

.gitignore

 .idea
 .phpunit.result.cache
-/build/
+cfgen.phar
 /vendor/

build-phar.php

 <?php
-if(!file_exists('build')) {
-    mkdir('build');
-}
-if(file_exists('build/cfgen.phar')) {
-    unlink('build/cfgen.phar');
-}
-$pharName = 'build/cfgen.phar';
-$p = new Phar($pharName, FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::KEY_AS_FILENAME, basename($pharName));
+$pharName = 'cfgen.phar';
+$p = new Phar($pharName, FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::KEY_AS_FILENAME, $pharName);
 $p->startBuffering();
 $p->setStub("#!/usr/bin/env php\n<?php Phar::mapPhar(); include \"phar://$pharName/src/cfgen.php\"; __HALT_COMPILER(); ?>");
 $p->buildFromDirectory('.', '/(src|vendor)\/(.*)\.php$/', );
 $p->stopBuffering();
-chmod('build/cfgen.phar', 0755);