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drupal/includes/update.inc

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<?php
// $Id$
/**
* @file
* Drupal database update API.
*
* This file contains functions to perform database updates for a Drupal
* installation. It is included and used extensively by update.php.
*/
/**
* Disable any items in the {system} table that are not core capatible.
*/
function update_fix_compatibility() {
$incompatible = array();
$result = db_query("SELECT name, type, status FROM {system} WHERE status = 1 AND type IN ('module','theme')");
foreach ($result as $row) {
if (update_check_incompatibility($row->name, $row->type)) {
$incompatible[] = $row->name;
}
}
if (!empty($incompatible)) {
db_update('system')
->fields(array('status' => 0))
->condition('name', $incompatible, 'IN')
->execute();
}
}
/**
* Helper function to test compatibility of a module or theme.
*/
function update_check_incompatibility($name, $type = 'module') {
static $themes, $modules;
// Store values of expensive functions for future use.
if (empty($themes) || empty($modules)) {
$themes = _system_rebuild_theme_data();
$modules = system_rebuild_module_data();
}
if ($type == 'module' && isset($modules[$name])) {
$file = $modules[$name];
}
elseif ($type == 'theme' && isset($themes[$name])) {
$file = $themes[$name];
}
if (!isset($file)
|| !isset($file->info['core'])
|| $file->info['core'] != DRUPAL_CORE_COMPATIBILITY
|| version_compare(phpversion(), $file->info['php']) < 0
|| ($type == 'module' && empty($file->info['files']))) {
return TRUE;
}
return FALSE;
}
/**
* Performs extra steps required to bootstrap when using a Drupal 6 database.
*
* Users who still have a Drupal 6 database (and are in the process of
* updating to Drupal 7) need extra help before a full bootstrap can be
* achieved. This function does the necessary preliminary work that allows
* the bootstrap to be successful.
*
* No access check has been performed when this function is called, so no
* changes to the database should be made here.
*/
function update_prepare_d7_bootstrap() {
// Allow the bootstrap to proceed even if a Drupal 6 settings.php file is
// still being used.
include_once DRUPAL_ROOT . '/includes/install.inc';
drupal_bootstrap(DRUPAL_BOOTSTRAP_CONFIGURATION);
global $databases, $db_url, $update_rewrite_settings;
if (empty($databases) && !empty($db_url)) {
$databases = update_parse_db_url($db_url);
// Record the fact that the settings.php file will need to be rewritten.
$update_rewrite_settings = TRUE;
$settings_file = conf_path() . '/settings.php';
$writable = drupal_verify_install_file($settings_file, FILE_EXIST|FILE_READABLE|FILE_WRITABLE);
$requirements = array(
'settings file' => array(
'title' => 'Settings file',
'value' => $writable ? 'The settings file is writable.' : 'The settings file is not writable.',
'severity' => $writable ? REQUIREMENT_OK : REQUIREMENT_ERROR,
'description' => $writable ? '' : 'Drupal requires write permissions to <em>' . $settings_file . '</em> during the update process. If you are unsure how to grant file permissions, consult the <a href="http://drupal.org/server-permissions">online handbook</a>.',
),
);
update_extra_requirements($requirements);
}
// The new {blocked_ips} table is used in Drupal 7 to store a list of
// banned IP addresses. If this table doesn't exist then we are still
// running on a Drupal 6 database, so we suppress the unavoidable errors
// that occur by creating a static list.
$GLOBALS['conf']['blocked_ips'] = array();
// Allow the database system to work even if the registry has not been
// created yet.
drupal_bootstrap(DRUPAL_BOOTSTRAP_DATABASE);
drupal_install_initialize_database();
spl_autoload_unregister('drupal_autoload_class');
spl_autoload_unregister('drupal_autoload_interface');
// The new cache_bootstrap bin is required to bootstrap to
// DRUPAL_BOOTSTRAP_SESSION, so create it here rather than in
// update_fix_d7_requirements().
$cache_bootstrap = array(
'description' => 'Cache table for data required to bootstrap Drupal, may be routed to a shared memory cache.',
'fields' => array(
'cid' => array(
'description' => 'Primary Key: Unique cache ID.',
'type' => 'varchar',
'length' => 255,
'not null' => TRUE,
'default' => '',
),
'data' => array(
'description' => 'A collection of data to cache.',
'type' => 'blob',
'not null' => FALSE,
'size' => 'big',
),
'expire' => array(
'description' => 'A Unix timestamp indicating when the cache entry should expire, or 0 for never.',
'type' => 'int',
'not null' => TRUE,
'default' => 0,
),
'created' => array(
'description' => 'A Unix timestamp indicating when the cache entry was created.',
'type' => 'int',
'not null' => TRUE,
'default' => 0,
),
'headers' => array(
'description' => 'Any custom HTTP headers to be added to cached data.',
'type' => 'text',
'not null' => FALSE,
),
'serialized' => array(
'description' => 'A flag to indicate whether content is serialized (1) or not (0).',
'type' => 'int',
'size' => 'small',
'not null' => TRUE,
'default' => 0,
),
),
'indexes' => array(
'expire' => array('expire'),
),
'primary key' => array('cid'),
);
db_create_table('cache_bootstrap', $cache_bootstrap);
}
/**
* A helper function that modules can use to assist with the transformation
* from numeric block deltas to string block deltas during the 6.x -> 7.x
* upgrade.
*
* @todo This function should be removed in 8.x.
*
* @param $sandbox
* An array holding data for the batch process.
* @param $renamed_deltas
* An associative array. Keys are module names, values an associative array
* mapping the old block deltas to the new block deltas for the module.
* Example:
* $renamed_deltas = array(
* 'mymodule' =>
* array(
* 0 => 'mymodule-block-1',
* 1 => 'mymodule-block-2',
* );
* );
*/
function update_fix_d7_block_deltas(&$sandbox, $renamed_deltas) {
// Loop through each block and make changes to the block tables.
// Only run this the first time through the batch update.
if (!isset($sandbox['progress'])) {
$block_tables = array('blocks', 'blocks_roles');
foreach ($block_tables as $table) {
foreach ($renamed_deltas as $module => $deltas) {
foreach ($deltas as $old_delta => $new_delta) {
// Only do the update if the old block actually exists.
$block_exists = db_query("SELECT COUNT(*) FROM {" . $table . "} WHERE module = :module AND delta = :delta", array(
':module' => $module,
':delta' => $old_delta,
))
->fetchField();
if ($block_exists) {
db_update($table)
->fields(array('delta' => $new_delta))
->condition('module', $module)
->condition('delta', $old_delta)
->execute();
}
}
}
}
// Initialize batch update information.
$sandbox['progress'] = 0;
$sandbox['last_user_processed'] = -1;
$sandbox['max'] = db_query("SELECT COUNT(*) FROM {users} WHERE data IS NOT NULL")->fetchField();
}
// Now do the batch update of the user-specific block visibility settings.
$limit = 100;
$result = db_select('users', 'u')
->fields('u', array('uid', 'data'))
->condition('uid', $sandbox['last_user_processed'], '>')
->where('data IS NOT NULL')
->range(0, $limit)
->execute();
foreach ($result as $row) {
$data = unserialize($row->data);
$user_needs_update = FALSE;
foreach ($renamed_deltas as $module => $deltas) {
foreach ($deltas as $old_delta => $new_delta) {
if (isset($data['block'][$module][$old_delta])) {
// Transfer the old block visibility settings to the newly-renamed
// block, and mark this user for a database update.
$data['block'][$module][$new_delta] = $data['block'][$module][$old_delta];
unset($data['block'][$module][$old_delta]);
$user_needs_update = TRUE;
}
}
}
// Update the current user.
if ($user_needs_update) {
db_update('users')
->fields(array('data' => serialize($data)))
->condition('uid', $row->uid)
->execute();
}
// Update our progress information for the batch update.
$sandbox['progress']++;
$sandbox['last_user_processed'] = $row->uid;
}
// Indicate our current progress to the batch update system.
if ($sandbox['progress'] < $sandbox['max']) {
$sandbox['#finished'] = $sandbox['progress'] / $sandbox['max'];
}
}
/**
* Perform Drupal 6.x to 7.x updates that are required for update.php
* to function properly.
*
* This function runs when update.php is run the first time for 7.x,
* even before updates are selected or performed. It is important
* that if updates are not ultimately performed that no changes are
* made which make it impossible to continue using the prior version.
*/
function update_fix_d7_requirements() {
global $conf;
// Rewrite the settings.php file if necessary, see
// update_prepare_d7_bootstrap().
global $update_rewrite_settings, $db_url;
if (!empty($update_rewrite_settings)) {
$databases = update_parse_db_url($db_url);
file_put_contents(conf_path() . '/settings.php', "\n" . '$databases = ' . var_export($databases, TRUE) . ';', FILE_APPEND);
}
if (drupal_get_installed_schema_version('system') < 7000 && !variable_get('update_d7_requirements', FALSE)) {
// Add the cache_path table.
$schema['cache_path'] = drupal_get_schema_unprocessed('system', 'cache');
$schema['cache_path']['description'] = 'Cache table used for path alias lookups.';
db_create_table('cache_path', $schema['cache_path']);
// system_update_7042() renames columns, but these are needed to bootstrap.
// Add empty columns for now.
db_add_field('url_alias', 'source', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''));
db_add_field('url_alias', 'alias', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''));
// Add new columns to {menu_router}.
db_add_field('menu_router', 'delivery_callback', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''));
db_add_field('menu_router', 'context', array(
'description' => 'Only for local tasks (tabs) - the context of a local task to control its placement.',
'type' => 'int',
'not null' => TRUE,
'default' => 0,
));
db_drop_index('menu_router', 'tab_parent');
db_add_index('menu_router', 'tab_parent', array(array('tab_parent', 64), 'weight', 'title'));
db_add_field('menu_router', 'theme_callback', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''));
db_add_field('menu_router', 'theme_arguments', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''));
// Add the role_permisson table.
$schema['role_permission'] = array(
'fields' => array(
'rid' => array(
'type' => 'int',
'unsigned' => TRUE,
'not null' => TRUE,
),
'permission' => array(
'type' => 'varchar',
'length' => 64,
'not null' => TRUE,
'default' => '',
),
),
'primary key' => array('rid', 'permission'),
'indexes' => array(
'permission' => array('permission'),
),
);
db_create_table('role_permission', $schema['role_permission']);
// Add the {semaphore} table in case menu_rebuild() gets called during
// an update.
$schema['semaphore'] = array(
'description' => 'Table for holding semaphores, locks, flags, etc. that cannot be stored as Drupal variables since they must not be cached.',
'fields' => array(
'name' => array(
'description' => 'Primary Key: Unique name.',
'type' => 'varchar',
'length' => 255,
'not null' => TRUE,
'default' => ''
),
'value' => array(
'description' => 'A value for the semaphore.',
'type' => 'varchar',
'length' => 255,
'not null' => TRUE,
'default' => ''
),
'expire' => array(
'description' => 'A Unix timestamp with microseconds indicating when the semaphore should expire.',
'type' => 'float',
'size' => 'big',
'not null' => TRUE
),
),
'indexes' => array('value' => array('value')),
'primary key' => array('name'),
);
db_create_table('semaphore', $schema['semaphore']);
// Add registry tables since these are required during an update.
$schema['registry'] = array(
'fields' => array(
'name' => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''),
'type' => array('type' => 'varchar', 'length' => 9, 'not null' => TRUE, 'default' => ''),
'filename' => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''),
'module' => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''),
'weight' => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
),
'primary key' => array('name', 'type'),
'indexes' => array(
'hook' => array('type', 'weight', 'module'),
),
);
$schema['registry_file'] = array(
'fields' => array(
'filename' => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE),
'filectime' => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
'filemtime' => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
),
'primary key' => array('filename'),
);
db_create_table('registry', $schema['registry']);
db_create_table('registry_file', $schema['registry_file']);
$schema['date_format_type'] = array(
'description' => 'Stores configured date format types.',
'fields' => array(
'type' => array(
'description' => 'The date format type, e.g. medium.',
'type' => 'varchar',
'length' => 64,
'not null' => TRUE,
),
'title' => array(
'description' => 'The human readable name of the format type.',
'type' => 'varchar',
'length' => 255,
'not null' => TRUE,
),
'locked' => array(
'description' => 'Whether or not this is a system provided format.',
'type' => 'int',
'size' => 'tiny',
'default' => 0,
'not null' => TRUE,
),
),
'primary key' => array('type'),
);
$schema['date_formats'] = array(
'description' => 'Stores configured date formats.',
'fields' => array(
'dfid' => array(
'description' => 'The date format identifier.',
'type' => 'serial',
'not null' => TRUE,
'unsigned' => TRUE,
),
'format' => array(
'description' => 'The date format string.',
'type' => 'varchar',
'length' => 100,
'not null' => TRUE,
),
'type' => array(
'description' => 'The date format type, e.g. medium.',
'type' => 'varchar',
'length' => 64,
'not null' => TRUE,
),
'locked' => array(
'description' => 'Whether or not this format can be modified.',
'type' => 'int',
'size' => 'tiny',
'default' => 0,
'not null' => TRUE,
),
),
'primary key' => array('dfid'),
'unique keys' => array('formats' => array('format', 'type')),
);
$schema['date_format_locale'] = array(
'description' => 'Stores configured date formats for each locale.',
'fields' => array(
'format' => array(
'description' => 'The date format string.',
'type' => 'varchar',
'length' => 100,
'not null' => TRUE,
),
'type' => array(
'description' => 'The date format type, e.g. medium.',
'type' => 'varchar',
'length' => 64,
'not null' => TRUE,
),
'language' => array(
'description' => 'A {languages}.language for this format to be used with.',
'type' => 'varchar',
'length' => 12,
'not null' => TRUE,
),
),
'primary key' => array('type', 'language'),
);
db_create_table('date_format_type', $schema['date_format_type']);
db_create_table('date_formats', $schema['date_formats']);
db_create_table('date_format_locale', $schema['date_format_locale']);
// Add the queue table.
$schema['queue'] = array(
'description' => 'Stores items in queues.',
'fields' => array(
'item_id' => array(
'type' => 'serial',
'unsigned' => TRUE,
'not null' => TRUE,
'description' => 'Primary Key: Unique item ID.',
),
'name' => array(
'type' => 'varchar',
'length' => 255,
'not null' => TRUE,
'default' => '',
'description' => 'The queue name.',
),
'data' => array(
'type' => 'text',
'not null' => FALSE,
'size' => 'big',
'serialize' => TRUE,
'description' => 'The arbitrary data for the item.',
),
'expire' => array(
'type' => 'int',
'not null' => TRUE,
'default' => 0,
'description' => 'Timestamp when the claim lease expires on the item.',
),
'created' => array(
'type' => 'int',
'not null' => TRUE,
'default' => 0,
'description' => 'Timestamp when the item was created.',
),
),
'primary key' => array('item_id'),
'indexes' => array(
'name_created' => array('name', 'created'),
'expire' => array('expire'),
),
);
db_create_table('queue', $schema['queue']);
// Create the sequences table.
$schema['sequences'] = array(
'description' => 'Stores IDs.',
'fields' => array(
'value' => array(
'description' => 'The value of the sequence.',
'type' => 'serial',
'unsigned' => TRUE,
'not null' => TRUE,
),
),
'primary key' => array('value'),
);
db_create_table('sequences', $schema['sequences']);
// Initialize the table with the maximum current increment of the tables
// that will rely on it for their ids.
$max_aid = db_query('SELECT MAX(aid) FROM {actions_aid}')->fetchField();
$max_uid = db_query('SELECT MAX(uid) FROM {users}')->fetchField();
$max_batch_id = db_query('SELECT MAX(bid) FROM {batch}')->fetchField();
db_insert('sequences')->fields(array('value' => max($max_aid, $max_uid, $max_batch_id)))->execute();
// Add column for locale context.
if (db_table_exists('locales_source')) {
db_add_field('locales_source', 'context', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => '', 'description' => 'The context this string applies to.'));
}
// Rename 'site_offline_message' variable to 'maintenance_mode_message'.
// Old variable is removed in update for system.module, see
// system_update_7036().
if ($message = variable_get('site_offline_message', NULL)) {
variable_set('maintenance_mode_message', $message);
}
variable_set('update_d7_requirements', TRUE);
}
update_fix_d7_install_profile();
}
/**
* Register the currently installed profile in the system table.
*
* Install profiles are now treated as modules by Drupal, and have an upgrade
* path based on their schema version in the system table.
*
* The install profile will be set to schema_version 0, as it has already been
* installed. Any other hook_update_N functions provided by the install profile
* will be run by update.php.
*/
function update_fix_d7_install_profile() {
$profile = drupal_get_profile();
$results = db_select('system', 's')
->fields('s', array('name', 'schema_version'))
->condition('name', $profile)
->condition('type', 'module')
->execute()
->fetchAll();
if (empty($results)) {
$filename = 'profiles/' . $profile . '/' . $profile . '.profile';
// Read profile info file
$info = drupal_parse_info_file(dirname($filename) . '/' . $profile . '.info');
// Merge in defaults.
$info = $info + array(
'dependencies' => array(),
'dependents' => array(),
'description' => '',
'package' => 'Other',
'version' => NULL,
'php' => DRUPAL_MINIMUM_PHP,
'files' => array(),
);
// The install profile is always required.
$file->info['required'] = TRUE;
$values = array(
'filename' => $filename,
'name' => $profile,
'info' => serialize($info),
'schema_version' => 0,
'type' => 'module',
'status' => 1,
'owner' => '',
);
// Install profile hooks are always executed last by the module system
$values['weight'] = 1000;
// Initializing the system table entry for the install profile
db_insert('system')
->fields(array_keys($values))
->values($values)
->execute();
// Reset the cached schema version.
drupal_get_installed_schema_version($profile, TRUE);
// Load the updates again to make sure the install profile updates are loaded
drupal_load_updates();
}
}
/**
* Parase pre-Drupal 7 database connection URLs and return D7 compatible array.
*
* @return
* Drupal 7 DBTNG compatible array of database connection information.
*/
function update_parse_db_url($db_url) {
$databases = array();
if (!is_array($db_url)) {
$db_url = array('default' => $db_url);
}
foreach ($db_url as $database => $url) {
$url = parse_url($url);
$databases[$database]['default'] = array(
// MySQLi uses the mysql driver.
'driver' => $url['scheme'] == 'mysqli' ? 'mysql' : $url['scheme'],
// Remove the leading slash to get the database name.
'database' => substr(urldecode($url['path']), 1),
'username' => urldecode($url['user']),
'password' => isset($url['pass']) ? urldecode($url['pass']) : '',
'host' => urldecode($url['host']),
'port' => isset($url['port']) ? urldecode($url['port']) : '',
);
}
return $databases;
}
/**
* Perform one update and store the results for display on finished page.
*
* If an update function completes successfully, it should return a message
* as a string indicating success, for example:
* @code
* return t('New index added successfully.');
* @endcode
*
* Alternatively, it may return nothing. In that case, no message
* will be displayed at all.
*
* If it fails for whatever reason, it should throw an instance of
* DrupalUpdateException with an appropriate error message, for example:
* @code
* throw new DrupalUpdateException(t('Description of what went wrong'));
* @endcode
*
* If an exception is thrown, the current and all later updates for this module
* will be aborted. The schema version will not be updated in this case, and all
* the aborted updates will continue to appear on update.php as updates that
* have not yet been run.
*
* If an update function needs to be re-run as part of a batch process, it
* should accept the $sandbox array by reference as its first parameter
* and set the #finished property to the percentage completed that it is, as a
* fraction of 1.
*
* @param $module
* The module whose update will be run.
* @param $number
* The update number to run.
* @param $context
* The batch context array
*/
function update_do_one($module, $number, &$context) {
// If updates for this module have been aborted
// in a previous step, go no further.
if (!empty($context['results'][$module]['#abort'])) {
return;
}
if (!isset($context['log'])) {
$context['log'] = variable_get('update_log_queries', 0);
}
$ret = array();
$function = $module . '_update_' . $number;
if (function_exists($function)) {
try {
if ($context['log']) {
Database::startLog($function);
}
$ret['results']['query'] = $function($context['sandbox']);
$ret['results']['success'] = TRUE;
}
// @TODO We may want to do different error handling for different exception
// types, but for now we'll just print the message.
catch (Exception $e) {
$ret['#abort'] = array('success' => FALSE, 'query' => $e->getMessage());
}
if ($context['log']) {
$ret['queries'] = Database::getLog($function);
}
}
if (isset($context['sandbox']['#finished'])) {
$context['finished'] = $context['sandbox']['#finished'];
unset($context['sandbox']['#finished']);
}
if (!isset($context['results'][$module])) {
$context['results'][$module] = array();
}
if (!isset($context['results'][$module][$number])) {
$context['results'][$module][$number] = array();
}
$context['results'][$module][$number] = array_merge($context['results'][$module][$number], $ret);
if (!empty($ret['#abort'])) {
$context['results'][$module]['#abort'] = TRUE;
}
// Record the schema update if it was completed successfully.
if ($context['finished'] == 1 && empty($context['results'][$module]['#abort'])) {
drupal_set_installed_schema_version($module, $number);
}
$context['message'] = 'Updating ' . check_plain($module) . ' module';
}
/**
* @class Exception class used to throw error if a module update fails.
*/
class DrupalUpdateException extends Exception { }
/**
* Start the database update batch process.
*
* @param $start
* An array of all the modules and which update to start at.
* @param $redirect
* Path to redirect to when the batch has finished processing.
* @param $url
* URL of the batch processing page (should only be used for separate
* scripts like update.php).
* @param $batch
* Optional parameters to pass into the batch API.
* @param $redirect_callback
* (optional) Specify a function to be called to redirect to the progressive
* processing page.
*/
function update_batch($start, $redirect = NULL, $url = NULL, $batch = array(), $redirect_callback = 'drupal_goto') {
// During the update, bring the site offline so that schema changes do not
// affect visiting users.
$_SESSION['maintenance_mode'] = variable_get('maintenance_mode', FALSE);
if ($_SESSION['maintenance_mode'] == FALSE) {
variable_set('maintenance_mode', TRUE);
}
$operations = array();
// Set the installed version so updates start at the correct place.
foreach ($start as $module => $version) {
drupal_set_installed_schema_version($module, $version - 1);
$updates = drupal_get_schema_versions($module);
$max_version = max($updates);
if ($version <= $max_version) {
foreach ($updates as $update) {
if ($update >= $version) {
$operations[] = array('update_do_one', array($module, $update));
}
}
}
}
$batch['operations'] = $operations;
$batch += array(
'title' => 'Updating',
'init_message' => 'Starting updates',
'error_message' => 'An unrecoverable error has occurred. You can find the error message below. It is advised to copy it to the clipboard for reference.',
'finished' => 'update_finished',
'file' => 'includes/update.inc',
);
batch_set($batch);
batch_process($redirect, $url, $redirect_callback);
}
/**
* Finish the update process and store results for eventual display.
*
* After the updates run, all caches are flushed. The update results are
* stored into the session (for example, to be displayed on the update results
* page in update.php). Additionally, if the site was off-line, now that the
* update process is completed, the site is set back online.
*
* @param $success
* Indicate that the batch API tasks were all completed successfully.
* @param $results
* An array of all the results that were updated in update_do_one().
* @param $operations
* A list of all the operations that had not been completed by the batch API.
*
* @see update_batch()
*/
function update_finished($success, $results, $operations) {
// Clear the caches in case the data has been updated.
drupal_flush_all_caches();
$_SESSION['update_results'] = $results;
$_SESSION['update_success'] = $success;
$_SESSION['updates_remaining'] = $operations;
// Now that the update is done, we can put the site back online if it was
// previously in maintenance mode.
if (isset($_SESSION['maintenance_mode']) && $_SESSION['maintenance_mode'] == FALSE) {
variable_set('maintenance_mode', FALSE);
unset($_SESSION['maintenance_mode']);
}
}
/**
* Return a list of all the pending database updates.
*
* @return
* An associative array keyed by module name which contains all information
* about database updates that need to be run, and any updates that are not
* going to proceed due to missing requirements. The system module will
* always be listed first.
*
* The subarray for each module can contain the following keys:
* - start: The starting update that is to be processed. If this does not
* exist then do not process any updates for this module as there are
* other requirements that need to be resolved.
* - warning: Any warnings about why this module can not be updated.
* - pending: An array of all the pending updates for the module including
* the update number and the description from source code comment for
* each update function. This array is keyed by the update number.
*/
function update_get_update_list() {
// Make sure that the system module is first in the list of updates.
$ret = array('system' => array());
$modules = drupal_get_installed_schema_version(NULL, FALSE, TRUE);
foreach ($modules as $module => $schema_version) {
$pending = array();
$updates = drupal_get_schema_versions($module);
// Skip incompatible module updates, otherwise test schema versions.
if (!update_check_incompatibility($module) && $updates !== FALSE && $schema_version >= 0) {
// module_invoke returns NULL for nonexisting hooks, so if no updates
// are removed, it will == 0.
$last_removed = module_invoke($module, 'update_last_removed');
if ($schema_version < $last_removed) {
$ret[$module]['warning'] = '<em>' . $module . '</em> module can not be updated. Its schema version is ' . $schema_version . '. Updates up to and including ' . $last_removed . ' have been removed in this release. In order to update <em>' . $module . '</em> module, you will first <a href="http://drupal.org/upgrade">need to upgrade</a> to the last version in which these updates were available.';
continue;
}
$updates = drupal_map_assoc($updates);
foreach (array_keys($updates) as $update) {
if ($update > $schema_version) {
// The description for an update comes from its Doxygen.
$func = new ReflectionFunction($module . '_update_' . $update);
$description = str_replace(array("\n", '*', '/'), '', $func->getDocComment());
$ret[$module]['pending'][$update] = "$update - $description";
if (!isset($ret[$module]['start'])) {
$ret[$module]['start'] = $update;
}
}
}
if (!isset($ret[$module]['start']) && isset($ret[$module]['pending'])) {
$ret[$module]['start'] = $schema_version;
}
}
}
if (empty($ret['system'])) {
unset($ret['system']);
}
return $ret;
}
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