avalon 中require.config源码分析

/*********************************************************************
 *                           配置系统 
       在系统运行的开始就需要读取系统中require.config()这个方法中所配置的项目                               *
 **********************************************************************/

//这里写在前面是为了更加方便阅读代码，在实际运行中，这几段代码必须放在下面

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/
    //将字符串安全格式化为正则表达式的源码
    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-")
    }
}