Register an arbitrary function, closure, or method as a command

[danielbachhuber]

For simpler definition of WP-CLI commands, it would be cool if you could specify an arbitrary callback as a command.

As an example:

WP_CLI::add_command( 'cool command', function( $args, $assoc_args ) {
    // do something
});

Documentation could be specified in the third $args parameter for WP_CLI::add_command(). However, we'd likely want to specify a schema for the documentation based on some formalization of our PHPdoc parsing.

[borekb]

Very good idea!

[danielbachhuber]

Documentation could be specified in the third $args parameter for WP_CLI::add_command()

As it turns out, PHP's Reflection properly parses docs for closures and functions, so we can handle this as a second issue.