WP_CLI slide presentation By Daniel Bachhuber at PDX WordPress Dev Meetup, on March 2013 source: http://danielbachhuber.com/2013/03/11/pdxwp-wp-cli-is-for-wp-devs-on-a-deadline/

wp_cli_slides.php

<?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 <img src="http://s0.wp.com/wp-includes/images/smilies/icon_smile.gif?m=1129645325g" alt=":)" class="wp-smiley"> ',
                        ),
                ),
            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 );
    }
 
}