version=4
opts="filenamemangle=s/.+\/v?(\d\S*)\.tar\.gz/golang-github-valyala-bytebufferpool-\$1\.tar\.gz/,\
      uversionmangle=s/(\d)[_\.\-\+]?(RC|rc|pre|dev|beta|alpha)[.]?(\d*)$/\$1~\$2\$3/" \
  https://github.com/valyala/bytebufferpool/tags .*/v?(\d\S*)\.tar\.gz
