static function parse($config_string, $dir_selection_groups)
{
$ds = array();
if ($config_string == 'random' || $config_string == 'most_available_space') {
global $storage_pool_directories;
$ds[] = new DirectorySelection(count($storage_pool_directories), $config_string, $storage_pool_directories, FALSE);
return $ds;
}
if (!preg_match('/forced ?\\((.+)\\) ?(random|most_available_space)/i', $config_string, $regs)) {
gh_log(CRITICAL, "Can't understand the dir_selection_algorithm value: {$config_string}");
}
$selection_algorithm = $regs[2];
$groups = array_map('trim', explode(',', $regs[1]));
foreach ($groups as $group) {
$group = explode(' ', preg_replace('/^([0-9]+)x/', '\\1 ', $group));
$num_dirs = trim($group[0]);
$group_name = trim($group[1]);
if ($num_dirs == 'all' || $num_dirs > count($dir_selection_groups[$group_name])) {
$num_dirs = count($dir_selection_groups[$group_name]);
}
$ds[] = new DirectorySelection($num_dirs, $selection_algorithm, $dir_selection_groups[$group_name], TRUE);
}
return $ds;
}
function db_migrate() {
global $db_options, $db_use_mysql, $db_use_sqlite;
// Migration #1 (complete = frozen|thawed)
if (@$db_use_mysql) {
$query = "DESCRIBE tasks";
$result = db_query($query) or die("Can't describe tasks with query: $query - Error: " . db_error());
while ($row = db_fetch_object($result)) {
if ($row->Field == 'complete') {
if ($row->Type == "enum('yes','no')") {
// migrate
db_query("ALTER TABLE tasks CHANGE complete complete ENUM('yes','no','frozen','thawed') NOT NULL");
db_query("ALTER TABLE tasks_completed CHANGE complete complete ENUM('yes','no','frozen','thawed') NOT NULL");
}
break;
}
}
} else if (@$db_use_sqlite) {
$query = "SELECT sql FROM sqlite_master WHERE type = 'table' AND name = 'tasks'";
$result = db_query($query) or die("Can't describe tasks with query: $query - Error: " . db_error());
while ($row = db_fetch_object($result)) {
if (strpos($row->sql, 'complete BOOL NOT NULL') !== FALSE) {
// migrate; not supported! @see http://sqlite.org/omitted.html
gh_log(CRITICAL, "Your SQLite database is not up to date. Column tasks.complete needs to be a TINYTEXT. Please fix, then retry.");
}
}
}
// Migration #2 (complete = idle)
if (@$db_use_mysql) {
$query = "DESCRIBE tasks";
$result = db_query($query) or die("Can't describe tasks with query: $query - Error: " . db_error());
while ($row = db_fetch_object($result)) {
if ($row->Field == 'complete') {
if ($row->Type == "enum('yes','no','frozen','thawed')") {
// migrate
db_query("ALTER TABLE tasks CHANGE complete complete ENUM('yes','no','frozen','thawed','idle') NOT NULL");
db_query("ALTER TABLE tasks_completed CHANGE complete complete ENUM('yes','no','frozen','thawed','idle') NOT NULL");
}
break;
}
}
}
// Migration #3 (larger settings.value: tinytext > text)
if (@$db_use_mysql) {
$query = "DESCRIBE settings";
$result = db_query($query) or die("Can't describe settings with query: $query - Error: " . db_error());
while ($row = db_fetch_object($result)) {
if ($row->Field == 'value') {
if ($row->Type == "tinytext") {
// migrate
db_query("ALTER TABLE settings CHANGE value value TEXT CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL");
}
break;
}
}
}
// Migration #4 (new index for find_next_task function, used by simplify_task, and also for execute_next_task function; also remove deprecated indexes)
if (@$db_use_mysql) {
$query = "SHOW INDEX FROM tasks WHERE Key_name = 'find_next_task'";
$result = db_query($query) or die("Can't show index with query: $query - Error: " . db_error());
if (db_fetch_object($result) === FALSE) {
// migrate
db_query("ALTER TABLE tasks ADD INDEX find_next_task (complete, share(64), id)");
}
$query = "SHOW INDEX FROM tasks WHERE Key_name = 'incomplete_open'";
$result = db_query($query) or die("Can't show index with query: $query - Error: " . db_error());
if (db_fetch_object($result)) {
// migrate
db_query("ALTER TABLE tasks DROP INDEX incomplete_open");
}
$query = "SHOW INDEX FROM tasks WHERE Key_name = 'subsequent_writes'";
$result = db_query($query) or die("Can't show index with query: $query - Error: " . db_error());
if (db_fetch_object($result)) {
// migrate
db_query("ALTER TABLE tasks DROP INDEX subsequent_writes");
}
$query = "SHOW INDEX FROM tasks WHERE Key_name = 'unneeded_unlinks'";
$result = db_query($query) or die("Can't show index with query: $query - Error: " . db_error());
if (db_fetch_object($result)) {
// migrate
db_query("ALTER TABLE tasks DROP INDEX unneeded_unlinks");
}
}
}