def lookup_gemspec
      dot_gemspec = (project.root + '.gemspec').to_s
      if File.exist?(dot_gemspec)
        dot_gemspec.to_s
      else
        project.metadata.name + '.gemspec'
      end
    end
def lookup_gemspec
      dot_gemspec = (project.root + '.gemspec').to_s
      if File.exist?(dot_gemspec)
        dot_gemspec.to_s
      else
        project.metadata.name + '.gemspec'
      end
    end
Lookup gemspec file. If not found returns default path.

 Returns String of file path.