version=4

opts="\
pgpsigurlmangle=s/$/.asc/,\
uversionmangle=s/(\d)[_.+-]?((beta|alpha)\.?\d*)$/$1~$2/,\
dversionmangle=s/\+dfsg\d*$//,\
repack,\
repacksuffix=+dfsg1,\
compression=xz,\
" \
 https://www.rust-lang.org/en-US/other-installers.html \
 (?:.*/)rustc?-(\d[\d.]*(?:-[\w.]+)?)-src\.tar\.gz