first pass, not working, of "local" weinre extensions via dotjs

weinre-ext.dot.js

//------------------------------------------------------------------------------
// dotjs extension to install extensions in weinre
//------------------------------------------------------------------------------

;(function() {

//------------------------------------------------------------------------------
// this function will string-ized and included in a script element that
// will be injected into the weinre client window
//------------------------------------------------------------------------------
function installExtensionAPI(weinreExtConfig) {
    var wec = weinreExtConfig

    //--------------------------------------------------------------------------
    // window.weinre.ext is where our API is installed
    //--------------------------------------------------------------------------
    window.weinre = {}
    weinre.ext = {}
    
    weinre.ext.home = wec.home
    
    //--------------------------------------------------------------------------
    // install a CSS file from the extension directory
    //--------------------------------------------------------------------------
    weinre.ext.installCSS = function(extensionName, cssURL) {
        var style = document.createElement("link")
        style.setAttribute("rel",  "stylesheet")
        style.setAttribute("type", "text/css")
        style.setAttribute("href", wec.home + "/" + extensionName + "/" + cssURL)
        
        document.body.appendChild(style)
    }
    
    //--------------------------------------------------------------------------
    // install a panel 
    //--------------------------------------------------------------------------
    weinre.ext.installPanel = function(extensionName, panel, toolbarIconURL) {
        // get the panel name (passed to Panel constructor)
        var panelName = panel._panelName
        
        // add panel to global list of panels
        WebInspector.panels[panelName] = panel
        
        // get the toolbar and the last toolbar item
        var toolbar = document.getElementById("toolbar")
        var lastToolbarItem = WebInspector.panelOrder.reverse()[0].toolbarItem
        
        // add our toolbar item
        var toolbarItem = WebInspector.addPanelToolbarIcon(toolbar, panel, lastToolbarItem)
        
        // set the toolbar item image
        var toolbarIconURL = weinre_ext_home + "/" + extensionName + "/" + toolbarIconURL
        toolbarItem.firstChild.style.backgroundImage = "url('" + toolbarIconURL + "')"
    }
    
    //--------------------------------------------------------------------------
    // load the extensions
    //--------------------------------------------------------------------------
    wec.extensions.forEach(function(extension) {
        var script = document.createElement("script")
        script.src = wec.home + "/" + extension + "/extension.js"
        document.body.appendChild(script)
    })
    
}

//------------------------------------------------------------------------------
function injectExtensionAPI(weinreExtConfig) {
    var code   = installExtensionAPI.toString()
    var config = JSON.stringify(weinreExtConfig)
    
    var script = document.createElement("script")
    
    script.innerText = ";(" + code + ")(" + config + ");"
    document.body.appendChild(script)
}

//------------------------------------------------------------------------------
// main logic here
//------------------------------------------------------------------------------
console.log("in dotjs weinre extension installer")

if (location.pathname != "/client/") return

var configURL = "http://localhost:3131/weinre-ext-config.json"

$(window).load(function() {
    $.ajax(configURL, {
        dataType: "json",
        success:  injectExtensionAPI,
        error:    function() { console.log("error loading " + configURL) }
    })
})

})();