File Source for install

<?php
/**
* @version $Header$
* @package install
* @subpackage functions
*/
$gBitSmarty->assign( 'next_step', $step );
$errors = $success = array();
// load up all available package upgrades that we have
$gBitInstaller->loadAllUpgradeFiles();
if( !empty( $_REQUEST['upgrade_packages'] )) {
if( !empty( $gDebug ) || !empty( $_REQUEST['debug'] ) ) {
$gBitInstaller->debug();
$gBitInstallDb->debug = 99;
}
if( !empty( $_REQUEST['packages'] ) && is_array( $_REQUEST['packages'] )) {
// ensure all packages are in the right order before we start applying upgrades
uasort( $_REQUEST['packages'], 'upgrade_package_sort' );
foreach( $_REQUEST['packages'] as $package ) {
if( $error = $gBitInstaller->upgradePackageVersions( $package )) {
$errors[$package] = $error;
} elseif( !empty( $gBitInstaller->mPackageUpgrades[$package] )) {
// copy the upgrade hash to success. next round this isn't available anymore from mPackageUpgrades since the package is up to date and the upgrade files aren't loaded anymore.
$success[$package] = $gBitInstaller->mPackageUpgrades[$package];
}
}
}
if( empty( $errors )) {
// display success page when done
$app = '_done';
$gBitSmarty->assign( 'next_step', $step + 1 );
}
}
$gBitSmarty->assign( 'requirements', $gBitInstaller->calculateRequirements() );
$gBitSmarty->assign( 'requirementsMap', $gBitInstaller->drawRequirementsGraph( FALSE, 'cmapx', ( !empty( $_REQUEST['command'] ) ? $_REQUEST['command'] : 'dot' )));
$gBitSmarty->assign( 'packageUpgrades', $gBitInstaller->mPackageUpgrades );
$gBitSmarty->assign( 'schema', $gBitInstaller->mPackages );
$gBitSmarty->assign( 'success', $success );
$gBitSmarty->assign( 'errors', $errors );
?>

Source for file install_upgrade.php