def read_manifest(self):
        """Read the manifest file (named by 'self.manifest') and use it to
        fill in 'self.filelist', the list of files to include in the source
        distribution.
        """
        log.info("reading manifest file '%s'", self.manifest)
        manifest = open(self.manifest, 'rb')
        for line in manifest:
            # The manifest must contain UTF-8. See #303.
            if six.PY3:
                try:
                    line = line.decode('UTF-8')
                except UnicodeDecodeError:
                    log.warn("%r not UTF-8 decodable -- skipping" % line)
                    continue
            # ignore comments and blank lines
            line = line.strip()
            if line.startswith('#') or not line:
                continue
            self.filelist.append(line)
        manifest.close()
Read the manifest file (named by 'self.manifest') and use it to
        fill in 'self.filelist', the list of files to include in the source
        distribution.