crude script to update base_url and index_page in CodeIgniter config.php

setup-config.php

<?php

$base_url = 'http://localhost';
$index_page = '';

$find = array();
$rep = array();

if(php_sapi_name() == 'cli')
{
	$contents = file_get_contents('config.php');

	if(preg_match('/\$config\[\'base_url\'\]\s=\s\'(.*)\'/', $contents, $match))
	{
		if(empty($match[1]))
		{
			$match[1] = "''";
			$base_url = "'$base_url'";
		}

		$res = str_replace($match[1], $base_url, $match[0]);

		$find[] = $match[0];
		$rep[] = $res;
	}

	if(preg_match('/\$config\[\'index_page\'\]\s=\s\'(.*)\'/', $contents, $match))
	{
		if(empty($match[1]))
		{
			$match[1] = "''";
			$index_page = "'$index_page'";
		}

		$res = str_replace($match[1], $index_page, $match[0]);

		$find[] = $match[0];
		$rep[] = $res;
	}

	file_put_contents('config.php', str_replace($find, $rep, $contents));
}

this is a first round proof of concept. will be reworking this.