def parse(self):
        """Parse the metadata.rb into a dict."""
        data = utils.ruby_lines(self.readlines())
        data = [tuple(j.strip() for j in line.split(None, 1))
                for line in data]
        depends = {}
        for line in data:
            if not len(line) == 2:
                continue
            key, value = line
            if key == 'depends':
                value = value.split(',')
                lib = utils.ruby_strip(value[0])
                detail = [utils.ruby_strip(j) for j in value[1:]]
                depends[lib] = detail
        datamap = {key: utils.ruby_strip(val) for key, val in data}
        if depends:
            datamap['depends'] = depends
        self.seek(0)
        return datamap
Parse the metadata.rb into a dict.