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512 lines
13 KiB
PHP
512 lines
13 KiB
PHP
<?php
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/**
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* Command-line database management utility to automate programmer chores.
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*
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* Schema is CakePHP's database management utility. This helps you maintain versions of
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* of your database.
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.console.libs
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* @since CakePHP(tm) v 1.2.0.5550
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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App::import('Core', 'File', false);
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App::import('Model', 'CakeSchema', false);
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/**
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* Schema is a command-line database management utility for automating programmer chores.
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*
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* @package cake
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* @subpackage cake.cake.console.libs
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* @link http://book.cakephp.org/view/1523/Schema-management-and-migrations
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*/
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class SchemaShell extends Shell {
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/**
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* is this a dry run?
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*
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* @var boolean
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* @access private
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*/
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var $__dry = null;
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/**
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* Override initialize
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*
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* @access public
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*/
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function initialize() {
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$this->_welcome();
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$this->out('Cake Schema Shell');
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$this->hr();
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}
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/**
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* Override startup
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*
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* @access public
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*/
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function startup() {
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$name = $file = $path = $connection = $plugin = null;
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if (!empty($this->params['name'])) {
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$name = $this->params['name'];
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} elseif (!empty($this->args[0])) {
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$name = $this->params['name'] = $this->args[0];
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}
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if (strpos($name, '.')) {
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list($this->params['plugin'], $splitName) = pluginSplit($name);
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$name = $this->params['name'] = $splitName;
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}
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if ($name) {
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$this->params['file'] = Inflector::underscore($name);
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}
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if (empty($this->params['file'])) {
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$this->params['file'] = 'schema.php';
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}
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if (strpos($this->params['file'], '.php') === false) {
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$this->params['file'] .= '.php';
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}
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$file = $this->params['file'];
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if (!empty($this->params['path'])) {
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$path = $this->params['path'];
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}
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if (!empty($this->params['connection'])) {
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$connection = $this->params['connection'];
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}
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if (!empty($this->params['plugin'])) {
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$plugin = $this->params['plugin'];
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if (empty($name)) {
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$name = $plugin;
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}
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}
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$this->Schema =& new CakeSchema(compact('name', 'path', 'file', 'connection', 'plugin'));
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}
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/**
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* Override main
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*
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* @access public
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*/
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function main() {
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$this->help();
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}
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/**
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* Read and output contents of schema object
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* path to read as second arg
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*
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* @access public
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*/
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function view() {
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$File = new File($this->Schema->path . DS . $this->params['file']);
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if ($File->exists()) {
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$this->out($File->read());
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$this->_stop();
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} else {
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$file = $this->Schema->path . DS . $this->params['file'];
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$this->err(sprintf(__('Schema file (%s) could not be found.', true), $file));
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$this->_stop();
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}
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}
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/**
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* Read database and Write schema object
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* accepts a connection as first arg or path to save as second arg
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*
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* @access public
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*/
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function generate() {
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$this->out(__('Generating Schema...', true));
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$options = array();
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if (isset($this->params['f'])) {
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$options = array('models' => false);
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}
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$snapshot = false;
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if (isset($this->args[0]) && $this->args[0] === 'snapshot') {
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$snapshot = true;
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}
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if (!$snapshot && file_exists($this->Schema->path . DS . $this->params['file'])) {
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$snapshot = true;
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$result = strtolower($this->in("Schema file exists.\n [O]verwrite\n [S]napshot\n [Q]uit\nWould you like to do?", array('o', 's', 'q'), 's'));
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if ($result === 'q') {
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return $this->_stop();
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}
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if ($result === 'o') {
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$snapshot = false;
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}
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}
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$cacheDisable = Configure::read('Cache.disable');
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Configure::write('Cache.disable', true);
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$content = $this->Schema->read($options);
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$content['file'] = $this->params['file'];
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Configure::write('Cache.disable', $cacheDisable);
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if ($snapshot === true) {
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$Folder =& new Folder($this->Schema->path);
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$result = $Folder->read();
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$numToUse = false;
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if (isset($this->params['s'])) {
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$numToUse = $this->params['s'];
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}
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$count = 1;
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if (!empty($result[1])) {
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foreach ($result[1] as $file) {
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if (preg_match('/schema(?:[_\d]*)?\.php$/', $file)) {
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$count++;
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}
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}
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}
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if ($numToUse !== false) {
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if ($numToUse > $count) {
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$count = $numToUse;
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}
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}
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$fileName = rtrim($this->params['file'], '.php');
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$content['file'] = $fileName . '_' . $count . '.php';
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}
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if ($this->Schema->write($content)) {
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$this->out(sprintf(__('Schema file: %s generated', true), $content['file']));
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$this->_stop();
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} else {
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$this->err(__('Schema file: %s generated', true));
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$this->_stop();
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}
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}
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/**
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* Dump Schema object to sql file
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* Use the `write` param to enable and control SQL file output location.
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* Simply using -write will write the sql file to the same dir as the schema file.
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* If -write contains a full path name the file will be saved there. If -write only
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* contains no DS, that will be used as the file name, in the same dir as the schema file.
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*
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* @access public
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*/
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function dump() {
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$write = false;
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$Schema = $this->Schema->load();
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if (!$Schema) {
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$this->err(__('Schema could not be loaded', true));
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$this->_stop();
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}
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if (isset($this->params['write'])) {
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if ($this->params['write'] == 1) {
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$write = Inflector::underscore($this->Schema->name);
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} else {
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$write = $this->params['write'];
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}
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}
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$db =& ConnectionManager::getDataSource($this->Schema->connection);
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$contents = "#" . $Schema->name . " sql generated on: " . date('Y-m-d H:i:s') . " : " . time() . "\n\n";
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$contents .= $db->dropSchema($Schema) . "\n\n". $db->createSchema($Schema);
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if ($write) {
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if (strpos($write, '.sql') === false) {
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$write .= '.sql';
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}
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if (strpos($write, DS) !== false) {
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$File =& new File($write, true);
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} else {
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$File =& new File($this->Schema->path . DS . $write, true);
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}
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if ($File->write($contents)) {
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$this->out(sprintf(__('SQL dump file created in %s', true), $File->pwd()));
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$this->_stop();
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} else {
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$this->err(__('SQL dump could not be created', true));
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$this->_stop();
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}
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}
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$this->out($contents);
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return $contents;
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}
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/**
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* Run database create commands. Alias for run create.
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*
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* @return void
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*/
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function create() {
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list($Schema, $table) = $this->_loadSchema();
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$this->__create($Schema, $table);
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}
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/**
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* Run database create commands. Alias for run create.
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*
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* @return void
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*/
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function update() {
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list($Schema, $table) = $this->_loadSchema();
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$this->__update($Schema, $table);
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}
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/**
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* Prepares the Schema objects for database operations.
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*
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* @return void
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*/
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function _loadSchema() {
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$name = $plugin = null;
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if (isset($this->params['name'])) {
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$name = $this->params['name'];
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}
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if (isset($this->params['plugin'])) {
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$plugin = $this->params['plugin'];
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}
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if (isset($this->params['dry'])) {
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$this->__dry = true;
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$this->out(__('Performing a dry run.', true));
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}
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$options = array('name' => $name, 'plugin' => $plugin);
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if (isset($this->params['s'])) {
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$fileName = rtrim($this->Schema->file, '.php');
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$options['file'] = $fileName . '_' . $this->params['s'] . '.php';
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}
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$Schema =& $this->Schema->load($options);
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if (!$Schema) {
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$this->err(sprintf(__('%s could not be loaded', true), $this->Schema->path . DS . $this->Schema->file));
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$this->_stop();
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}
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$table = null;
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if (isset($this->args[1])) {
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$table = $this->args[1];
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}
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return array(&$Schema, $table);
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}
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/**
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* Create database from Schema object
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* Should be called via the run method
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*
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* @access private
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*/
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function __create(&$Schema, $table = null) {
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$db =& ConnectionManager::getDataSource($this->Schema->connection);
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$drop = $create = array();
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if (!$table) {
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foreach ($Schema->tables as $table => $fields) {
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$drop[$table] = $db->dropSchema($Schema, $table);
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$create[$table] = $db->createSchema($Schema, $table);
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}
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} elseif (isset($Schema->tables[$table])) {
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$drop[$table] = $db->dropSchema($Schema, $table);
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$create[$table] = $db->createSchema($Schema, $table);
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}
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if (empty($drop) || empty($create)) {
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$this->out(__('Schema is up to date.', true));
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$this->_stop();
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}
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$this->out("\n" . __('The following table(s) will be dropped.', true));
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$this->out(array_keys($drop));
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if ('y' == $this->in(__('Are you sure you want to drop the table(s)?', true), array('y', 'n'), 'n')) {
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$this->out(__('Dropping table(s).', true));
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$this->__run($drop, 'drop', $Schema);
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}
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$this->out("\n" . __('The following table(s) will be created.', true));
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$this->out(array_keys($create));
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if ('y' == $this->in(__('Are you sure you want to create the table(s)?', true), array('y', 'n'), 'y')) {
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$this->out(__('Creating table(s).', true));
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$this->__run($create, 'create', $Schema);
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}
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$this->out(__('End create.', true));
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}
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/**
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* Update database with Schema object
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* Should be called via the run method
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*
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* @access private
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*/
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function __update(&$Schema, $table = null) {
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$db =& ConnectionManager::getDataSource($this->Schema->connection);
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$this->out(__('Comparing Database to Schema...', true));
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$options = array();
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if (isset($this->params['f'])) {
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$options['models'] = false;
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}
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$Old = $this->Schema->read($options);
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$compare = $this->Schema->compare($Old, $Schema);
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$contents = array();
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if (empty($table)) {
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foreach ($compare as $table => $changes) {
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$contents[$table] = $db->alterSchema(array($table => $changes), $table);
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}
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} elseif (isset($compare[$table])) {
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$contents[$table] = $db->alterSchema(array($table => $compare[$table]), $table);
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}
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if (empty($contents)) {
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$this->out(__('Schema is up to date.', true));
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$this->_stop();
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}
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$this->out("\n" . __('The following statements will run.', true));
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$this->out(array_map('trim', $contents));
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if ('y' == $this->in(__('Are you sure you want to alter the tables?', true), array('y', 'n'), 'n')) {
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$this->out();
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$this->out(__('Updating Database...', true));
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$this->__run($contents, 'update', $Schema);
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}
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$this->out(__('End update.', true));
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}
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/**
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* Runs sql from __create() or __update()
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*
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* @access private
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*/
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function __run($contents, $event, &$Schema) {
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if (empty($contents)) {
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$this->err(__('Sql could not be run', true));
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return;
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}
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Configure::write('debug', 2);
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$db =& ConnectionManager::getDataSource($this->Schema->connection);
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foreach ($contents as $table => $sql) {
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if (empty($sql)) {
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$this->out(sprintf(__('%s is up to date.', true), $table));
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} else {
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if ($this->__dry === true) {
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$this->out(sprintf(__('Dry run for %s :', true), $table));
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$this->out($sql);
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} else {
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if (!$Schema->before(array($event => $table))) {
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return false;
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}
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$error = null;
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if (!$db->execute($sql)) {
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$error = $table . ': ' . $db->lastError();
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}
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$Schema->after(array($event => $table, 'errors' => $error));
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if (!empty($error)) {
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$this->out($error);
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} else {
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$this->out(sprintf(__('%s updated.', true), $table));
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}
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}
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}
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}
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}
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/**
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* Displays help contents
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*
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* @access public
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*/
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function help() {
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$help = <<<TEXT
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The Schema Shell generates a schema object from
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the database and updates the database from the schema.
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---------------------------------------------------------------
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Usage: cake schema <command> <arg1> <arg2>...
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---------------------------------------------------------------
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Params:
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-connection <config>
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set db config <config>. uses 'default' if none is specified
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-path <dir>
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path <dir> to read and write schema.php.
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default path: {$this->Schema->path}
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-name <name>
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Classname to use. If <name> is Plugin.className, it will
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set the plugin and name params.
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-file <name>
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file <name> to read and write.
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default file: {$this->Schema->file}
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-s <number>
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snapshot <number> to use for run.
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-dry
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Perform a dry run on create + update commands.
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Queries will be output to window instead of executed.
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-f
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force 'generate' to create a new schema.
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-plugin
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Indicate the plugin to use.
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Commands:
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schema help
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shows this help message.
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schema view <name>
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read and output contents of schema file.
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schema generate
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reads from 'connection' writes to 'path'
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To force generation of all tables into the schema, use the -f param.
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Use 'schema generate snapshot <number>' to generate snapshots
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which you can use with the -s parameter in the other operations.
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schema dump <name>
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Dump database sql based on schema file to stdout.
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If you use the `-write` param is used a .sql will be generated.
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If `-write` is a filename, then that file name will be generate.
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If `-write` is a full path, the schema will be written there.
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schema create <name> <table>
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Drop and create tables based on schema file
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optional <table> argument can be used to create only a single
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table in the schema. Pass the -s param with a number to use a snapshot.
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Use the `-dry` param to preview the changes.
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schema update <name> <table>
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Alter the tables based on schema file. Optional <table>
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parameter will only update one table.
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To use a snapshot pass the `-s` param with the snapshot number.
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To preview the changes that will be done use `-dry`.
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To force update of all tables into the schema, use the -f param.
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TEXT;
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$this->out($help);
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$this->_stop();
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}
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}
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