#!/bin/bash

curl -LSs 'https://gitlab.com/libeigen/eigen/-/tags' \
| tr '"' '\n' \
| sed '
  s@^/libeigen/eigen/-/archive/\([0-9.]\+\)/eigen-\1\.tar\.bz2$@\1@
  t
  d
' \
| sort -V \
| tail -n1