jetpack-offline-hacks.php

<?php 

function hack_jetpack_offline_mode() {
	if ( ! file_exists( WP_PLUGIN_DIR . '/jetpack/' ) || class_exists( 'Jetpack' ) )
		return;

	require_once( WP_PLUGIN_DIR . '/jetpack/jetpack.php' );

	// Disable Jetpack's notification messages
	hack_disable_jetpack_notices();

	// List of modules we'd like to activate
	$modules = array(
		'sharedaddy',
	);

	foreach ( $modules as $module ) {
		require Jetpack::get_module_path( $module );
		do_action( 'jetpack_module_loaded_' . $module );
	}
}
add_action( 'plugins_loaded', 'hack_jetpack_offline_mode', 99 );

function hack_disable_jetpack_notices() {
	global $jetpack_hijacked_instance;

	// Halt the default Jetpack initialization
	remove_action( 'init', array( 'Jetpack', 'init' ) );

	// Hijack Jetpack's instance (which usually gets lost in global space)
	$jetpack_hijacked_instance = Jetpack::init();

	// Remove responsible functions
	add_action( 'admin_init', 'hack_shut_off_notices_for_jetpack', 20 );
}

function hack_shut_off_notices_for_jetpack() {
	global $jetpack_hijacked_instance;

	remove_action( 'load-index.php', array( $jetpack_hijacked_instance, 'prepare_connect_notice' ) );
	remove_action( 'load-plugins.php', array( $jetpack_hijacked_instance, 'prepare_connect_notice' ) );

	// Ensures Jetpack's top level menu doesn't show up. Remove line to display.
	remove_menu_page( 'jetpack' );
}