inc_projects_config.php

<?php

$aConfig = include('config_defaults.php');
if (file_exists('config_custom.php')){
    $aConfig = array_replace_recursive(
        $aConfig,
        include('config_custom.php')
    );    
}

// ----------------------------------------------------------------------
// generate some vars
// ----------------------------------------------------------------------

$aConfig = array_merge($aConfig, [
    'appRootDir' => dirname(dirname(__FILE__)),
    'configDir' => dirname(__FILE__),
    'dataDir' => $aConfig['workDir'] . '/data',    // to write data: ssh keys, projects, database
    'buildDir' => $aConfig['workDir'] . '/build',
    'buildDefaultsDir' => $aConfig['workDir'] . '/defaults',
    'packageDir' => $aConfig['workDir'] . '/packages',
    'archiveDir' => $aConfig['workDir'] . '/packages/_files',
]);