A transform for use with jscodeshift

single-to-double-quotes.js

module.exports = function(fileInfo, api) {
  var j = api.jscodeshift;

  var out = j(fileInfo.source)
    .find(j.Literal)
    .forEach(function (path) {
      // Only consider literals that start/end w/ double quotes
      if (!/^'.*'$/.test(path.value.raw)) {
        return;
      }

      j(path).replaceWith(j.literal(path.value.value));
    })
    .toSource({quote: 'double'});
  return out;
};