WP CLI Skeleton

wp-cli-skeleton.php

<?php
/**
 * CLI commands
 * https://make.wordpress.org/cli/handbook/guides/commands-cookbook/
 */

WP_CLI::add_command( '[command]', '[CLASS_NAME]' );

/**
 * WP_CLI class
 *
 * @package [package]
 */
class [CLASS_NAME] extends WP_CLI_Command {

	/**
	 * Description
	 *
	 * ## OPTIONS
	 *
     * <arg>
     * : Non-labeled argument.
     *
	 * [--assoc-arg=<assoc-arg>]
     * : Labeled argument.
     * ---
     * default: any
     * options: 
     *   - opt1
     *   - opt2
     * ---
     *
     * ## EXAMPLES
     * wp example arg --assoc-arg=value --url=URL
	 *
	 * @subcommand [function-with-dashes]
	 */
	public function [function-name]( $args, $assoc_args ) {
		$default = array(
			'[assoc-arg]' => '[value]',
		);

		$info = wp_parse_args( $assoc_args, $default ); // Merge incoming $assoc_args with $defaults.
		$yay  = 0; // Successful.
		$boo  = array( // Didn't work.
			'count' => 0,
			'slugs' => array(),
		);

		foreach ( $data as $key => $value ) {
			if ( empty( $value ) ) {
				WP_CLI::error( $key . ' variable must be filled out.' );
				return;
			}
		}
	}
}

/**
 * Add to functions.php
 * 
 * if ( defined( 'WP_CLI' ) && WP_CLI ) {
 * 	require_once '[path-to-cli-script]';
 * }
 */