javascriptで現在実行中のファイルパス（__FILE__）及び行番号（__LINE__）を取得する方法 ref: http://qiita.com/jiyu/items/6be41ca3a7b2e91b0335

file0.js

Object.defineProperty(window, '__STACK__', {
    get: function(){
        let origin = Error.prepareStackTrace;
        Error.prepareStackTrace = function(_, stack){ return stack; };
        let err = new Error;
        Error.captureStackTrace(err, arguments.callee);
        let stack = err.stack;
        Error.prepareStackTrace = origin;
        return stack;
    }
});
Object.defineProperty(window, '__FILE__', {
    get: function(){
        let filename = __STACK__[1].getFileName().replace(location.origin, "").replace(window.location.search, "");
        if(!filename) filename = "/";
        return filename;
    }
});
Object.defineProperty(window, '__LINE__', {
    get: function(){
        return __STACK__[1].getLineNumber();
    }
});
console.log("__FILE__", __FILE__);
console.log("__LINE__", __LINE__);

file0.txt

Object.defineProperty(window, '__STACK__', {
    get: function(){
        var orig = Error.prepareStackTrace;
        Error.prepareStackTrace = function(_, stack){ return stack; };
        var err = new Error;
        Error.captureStackTrace(err, arguments.callee);
        var stack = err.stack;
        Error.prepareStackTrace = orig;
        return stack;
    }
});
Object.defineProperty(window, '__FILE__', {
    get: function(){
        let filename = __STACK__[1].getFileName().replace(location.origin, "").replace(window.location.search, "");
        if(!filename) filename = "/";
        return filename;
    }
});
Object.defineProperty(window, '__LINE__', {
    get: function(){
        return __STACK__[1].getLineNumber();
    }
});
Object.defineProperty(window, '__HERE__', {
    get: function(){
        let filename = __STACK__[1].getFileName().replace(location.origin, "").replace(window.location.search, "");
        if(!filename) filename = "/";
        return filename + ":" + __STACK__[1].getLineNumber();
    }
});
console.log("__FILE__", __FILE__);
console.log("__LINE__", __LINE__);
console.log("__HERE__", __HERE__);

file1.js

$.ajaxSetup({
    dataFilter: function(data) {
        let filename = this.url.replace(location.origin, "").replace(/\?.*/, "");
        if(this.dataType === "script") return `__XHR_FILE__ = "${filename}";\n` + data;
        else if(this.dataType === "html") return `<script class="init_script">__XHR_FILE__ = "${filename}";<\/script>` + data;
        else return data;
    },
});