Commands

Also known as "xpcli": Command line argument parsing via annotations.

Example

use util\cmd\{Command, Arg};
use rdbms\DriverManager;
use io\streams\Streams;

/** Performs an SQL query */
class Query extends Command {
  private $connection, $query;
  private $verbose= false;

  /** Connection DSN, e.g. `mysql://user:pass@host[:port][/database]` */
  #[Arg(position: 0)]
  public function useConnection(string $dsn) {
    $this->connection= DriverManager::getConnection($dsn);
    $this->connection->connect();
  }

  /** SQL query. Use `-` to read from standard input */
  #[Arg(position: 1)]
  public function useQuery(string $query) {
    if ('-' === $query) {
      $this->query= Streams::readAll($this->in->stream());
    } else {
      $this->query= $query;
    }
  }

  /** Verbose output */
  #[Arg]
  public function useVerbose() {
    $this->verbose= true;
  }

  /** @return int */
  public function run() {
    $this->verbose && $this->out->writeLine('@ ', $this->connection);
    $this->verbose && $this->out->writeLine('>>> ', $this->query);

    $result= $this->connection->open($this->query);
    if ($result->isSuccess()) {
      $this->verbose && $this->out->writeLine('<<< ', $result->affected());
      return $result->affected() ? 0 : 1;
    } else {
      $this->verbose && $this->out->writeLine('<<< Results');
      foreach ($result as $found => $record) {
        $this->out->writeLine($record);
      }
      return isset($found) ? 0 : 2;
    }
  }
}

To execute the class, use the cmd command:

$ xp -m /path/to/rdbms cmd Query 'mysql://localhost/test' 'select * from account' -v
@ rdbms.mysqlx.MySqlxConnection(->rdbms.DSN@(mysql://localhost/test), rdbms.mysqlx.MySqlxProtocol(...)
>>> select * from account
<<< Results
[
  account_id => 1
  username => "kiesel"
  email => "alex.dandrea@example.com"
]
[
  account_id => 2
  username => "thekid"
  email => "timm.friebe@example.com"
]

To show the command's usage, supply -? or --help:

See also

• RFC #0133 - Add support for filenames as argument for XPCLI
• RFC #0102 - XP Class Runners (original RFC)