debug.js

/*
 * debug.js
 *
 * This module provides some functions that are used when the engine is run in "debug" mode.
 * (Debug mode is enacted by passing the --debug switch to server.js)
 *
 */
var dashboard = require("./dashboard");
var log = require("./log").logger("debug");
var config = require("./config");
var path = require("path");

var watch_semaphore = 0;

// App reloader
var appReloader = function (event, pth, details) {
    pth = path.normalize(details.watchedPath || details.path);

    // Don't watch for changes if there is an update in progress
    if (watch_semaphore) {
        log.warn(
            "Not reloading " + pth + " because a reload is already in progress."
        );
        return;
    }

    // Determine which app changed, and re-copy that app
    var app_index = dashboard.getAppIndex();
    for (var app_id in app_index) {
        var app_path = app_index[app_id].app_archive_path;
        app_path = path.normalize(app_path);
    }
};

// This function is called (if enabled) at application startup.
// Nominally, it sets up a "watcher" that live-reloads system apps if they are edited while the system is running.
function startDebug() {
    log.info("Starting debug watcher...");
    var chokidar = require("chokidar");
    var pth = path.resolve("./dashboard/apps");
    log.debug("Watching " + pth + " for changes...");
    var watcher = chokidar.watch(pth, {
        ignored: /[/\\]\./,
        persistent: true,
    });
    watcher.on("raw", appReloader);
    watcher = chokidar.watch(config.getDataDir("apps"), {
        ignored: /[/\\]\./,
        persistent: true,
    });
    watcher.on("raw", appReloader);
}

exports.start = startDebug;