Unmap source map

source-unmap.js

var sourceMap = require('source-map');
var https = require('https');
var fs = require('fs');

var args = process.argv.slice(2);
if(args.length === 0) {
  console.log("Usage: node index.js https://url.to/script.js:<line>:<column>");
  return;
}

var match = args[0].match(/(.*?):(\d+):(\d+)$/);
var url = match[1];
var mapFileURL = url + ".map";
var line = match[2];
var column = match[3];

var request = https.get(mapFileURL, function(response) {
  var data = "";
  response.on('data', function(chunk) {
    data += chunk;
  });
  response.on('end', () => {
    var smc = new sourceMap.SourceMapConsumer(JSON.parse(data));

    console.log(smc.originalPositionFor({
      line: parseInt(line, 10),
      column: parseInt(column, 10)
    }));
  });
});