magicmethods.js

// sets globals __line, __file, __ext, __dir
// copied and tweaked from: http://goo.gl/wwjGVV and http://goo.gl/umq4s1
// todo: __function and __method?

// begin setting magic properties into global
Object.defineProperty(global, '__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;
  }
});

/**
 * returns line number when placing this in your code: __line
 */
Object.defineProperty(global, '__line', {
  get: function(){
    return __stack[1].getLineNumber();
  }
});

/**
 * return filename (without directory path or file extension) when placing this in your code: __file
 */
Object.defineProperty(global, '__file', {
  get: function(){
    return __stack[1].getFileName().split('/').slice(-1)[0].split('.').slice(0)[0];
  }
});

/**
 * return file extension (without preceding period) when placing this in your code: __ext
 */
Object.defineProperty(global, '__ext', {
  get: function(){
    return __stack[1].getFileName().split('.').slice(-1)[0];
  }
});

/**
 * return path to filename (with trailing slash) when placing this in your code: __dir
 */
Object.defineProperty(global, '__dir', {
  get: function(){
    filename = __stack[1].getFileName().split('/').slice(-1)[0];
    return __stack[1].getFileName().split(filename).slice(0)[0];
  }
});


// end setting magic properties into global