1. modify sourceMap regExp 2.dont't edit source map

[yeatszhang]

1. some times sourceMapUrl have a charset field
2. do not need to modify generated sourceMap

When I use uglifyify writing a browserify plugin.
It do not work.

function createRevStream(dest, revdest, debug) {
  var min = uglifyify(dest, { sourcemap: true }).pipe(exorcist(dest + '.map'));
  var out = fs.createWriteStream(revdest)
  var s = through(function write(buf, enc, next) {
    min.write(buf)
    next()
  }, function end(next) {
    out.on('finish', next)
    min.end()
  })
  out.on('error', s.emit.bind(s, 'error'))
  min.pipe(out)
  return s
}

I found the problem is the source map browserify generated has a chartset field so matched is null

sourceMappingURL=data:application\/json;charset:utf-8;base64.

I modified the RegExp but it still do not work.

After reading the uglifyjs api, I though it is no need to add these code

var map = convert.fromJSON(min.map)
map.setProperty('sources', [file])
map.setProperty('sourcesContent', matched
  ? opts.inSourceMap.sourcesContent
  : [buffer]
)

I removed these code and it works well. 囧

[weilu]

LGTM, granted I'm not familiar with sourcemap. Ping @hughsk, can you take a look?