As a part of tonight’s “It’s Tool Time: 4 Tools You Cannot Live Without” meetup, I presented on my beloved wp-cli. wp-cli is a command line interface for WordPress, and a tremendously powerful tool for WordPress developers on a deadline. So powerful, in fact, I wrote my slides as a command 15 minutes before my talk.

<?php

if ( ! defined( 'WP_CLI' ) )
	return;

WP_CLI::add_command( 'pdxwp-presentation', 'PDXWP_WP_CLI_Presentation_Command' );

class PDXWP_WP_CLI_Presentation_Command extends WP_CLI_Command {

	/**
	 * Start the presentation with a demonstration
	 *
	 * @subcommand slide
	 * @synopsis <number>
	 */
	public function slide( $args ) {

		list( $num ) = $args;

		$slides = array(
			0 => array(
					'header'	=> 'wp-cli is for WP devs on a deadline (http://wp-cli.org)',
					'body'		=> array(
							'Daniel Bachhuber',
							'daniel@automattic.com',
							'@danielbachhuber',
						),
				),
			1 => array(
					'header'	=> 'What is wp-cli?',
					'body'		=> array(
							'- A Command Line Interface for WordPress',
							'- A powerful tool for manipulating WordPress',
							'- A nascent WordPress community project with lots of opportunity for contributions',
						),
				),
			2 => array(
					'header'	=> 'Why is it useful to me?',
					'body'		=> array(
							'- Open wp shell to execute arbitrary functions',
							'- Install, update, or delete plugins',
							'- Create posts, users, terms',
							'- More easily manage lots of client sites',
							'- Export a large amount of data',
							'- Scaffold a theme, plugin, or unit tests for a plugin',
						),
				),
			3 => array(
					'header'	=> 'Where do I start?',
					'body'		=> array(
							'- Install wp-cli',
							'- (monkey dance)',
							'- Profit!',
						),
				),
			4 => array(
					'header'	=> 'How do I install?',
					'body'		=> array(
							'On your command line:',
							'- git clone git://github.com/wp-cli/wp-cli.git ~/git/wp-cli',
							'- cd ~/git/wp-cli',
							'- curl -sS https://getcomposer.org/installer | php',
							'- php composer.phar install',
						),
				),
			5 => array(
					'header'	=> 'How do I write my own command?',
					'body'		=> array(
							'- Create a class extending WP_CLI_Command',
							"- Register your command with WP_CLI::add_command( 'pdxwp-presentation', 'PDXWP_WP_CLI_Presentation_Command' );",
							'- public methods are subcommands',
							'- PHPdoc allows you to set a <synopsis>',
							'- Sekret pro tip: Package useful commands with your plugins  ',
						),
				),
			6 => array(
					'header'	=> 'Now go! http://wp-cli.org',
					'body'		=> array(
						),
				),
			);

		passthru( '/opt/local/bin/clear' );
		if ( ! empty( $slides[(int)$num] ) ) {
			$slide = $slides[(int)$num];
			for( $i = 0; $i < 23; $i++ ) {

				if ( $i == 3 ) {
					$this->line( $slide['header'] );
					continue;
				}

				if ( $i == 6 ) {
					foreach( $slide['body'] as $line ) {
						$this->line( $line );
						$i++;
					}
				}
				$this->line();
			}
		} else {
			WP_CLI::error( "No slide #{$num}" );
		}

	}

	private function line( $out = '' ) {
		WP_CLI::line( "    " . $out );
	}

}

Here’s what the presentation actually looked like: