version=4
opts="dversionmangle=s/\+dfsg\d*$//, \
    repacksuffix=+dfsg1, \
    uversionmangle=s/-/./g, \
    filenamemangle=s/.+\/v?(\d\S+)\.tar\.gz/freefem\+\+-(.+)\.tar\.gz/ " \
    https://github.com/FreeFem/FreeFem-sources/tags .*/v?(\d\S+)\.tar\.gz
