function imageMagickOutputToObject(output) {
  let previousLineIndent = 0;
  const lines = output.match(/[^\r\n]+/g);
  lines.shift(); // Remove First line
  lines.forEach((line, index) => {
    const currentIdent = line.search(/\S/);
    line = line.trim();
    if (line.endsWith(':')) {
      lines[index] = makeKeyFirebaseCompatible(`"${line.replace(':', '":{')}`);
    } else {
      const split = line.replace('"', '\\"').split(': ');
      split[0] = makeKeyFirebaseCompatible(split[0]);
      lines[index] = `"${split.join('":"')}",`;
    }
    if (currentIdent < previousLineIndent) {
      lines[index - 1] = lines[index - 1].substring(0, lines[index - 1].length - 1);
      lines[index] = new Array(1 + (previousLineIndent - currentIdent) / 2).join('}') + ',' + lines[index];
    }
    previousLineIndent = currentIdent;
  });
  output = lines.join('');
  output = '{' + output.substring(0, output.length - 1) + '}'; // remove trailing comma.
  output = JSON.parse(output);
  functions.logger.log('Metadata extracted from image', output);
  return output;
}
Convert the output of ImageMagick's `identify -verbose` command to a JavaScript Object.