avalon 中require.config源碼分析

/*********************************************************************
 *                           配置系統 
       在系統運行的開始就須要讀取系統中require.config()這個方法中所配置的項目                               *
 **********************************************************************/

//這裏寫在前面是爲了更加方便閱讀代碼，在實際運行中，這幾段代碼必須放在下面

kernel.debug = true kernel.plugins = plugins kernel.plugins['interpolate'](["{{", "}}"]) kernel.paths = {} kernel.shim = {} kernel.maxRepeatSize = 100 avalon.config = kernel

function kernel(settings) {
    for (var p in settings) {
        if (!ohasOwn.call(settings, p))
            continue
        var val = settings[p]
        if (typeof kernel.plugins[p] === "function") {
            kernel.plugins[p](val)
        } else if (typeof kernel[p] === "object") {
            avalon.mix(kernel[p], val)
        } else {
            kernel[p] = val
        }
    }
    return this
}
var openTag, closeTag, rexpr, rexprg, rbind, rregexp = /[-.*+?^${}()|[\]\/\\]/g

function escapeRegExp(target) {
    //http://stevenlevithan.com/regex/xregexp/
    //將字符串安全格式化爲正則表達式的源碼
    return (target + "").replace(rregexp, "\\$&")
}
var innerRequire = noop
var plugins = {
    loader: function(builtin) {
        window.define = builtin ? innerRequire.define : otherDefine
        window.require = builtin ? innerRequire : otherRequire
    },
    interpolate: function(array) {
        openTag = array[0]
        closeTag = array[1]
        if (openTag === closeTag) {
            throw new SyntaxError("openTag!==closeTag")
        } else if (array + "" === "<!--,-->") {
            kernel.commentInterpolate = true
        } else {
            var test = openTag + "test" + closeTag
            cinerator.innerHTML = test
            if (cinerator.innerHTML !== test && cinerator.innerHTML.indexOf("&lt;") > -1) {
                throw new SyntaxError("此定界符不合法")
            }
            cinerator.innerHTML = ""
        }
        var o = escapeRegExp(openTag),
                c = escapeRegExp(closeTag)
        rexpr = new RegExp(o + "(.*?)" + c)
        rexprg = new RegExp(o + "(.*?)" + c, "g")
        rbind = new RegExp(o + ".*?" + c + "|\\sms-")
    }
}