awk version of branch matching

gistfile1.sh

    ADHD_HEAD="`awk '
        BEGIN {
            crosver = "'"$CROS_VER"'"
            crosvers[0] = crosver
            while (sub(/\.[^.]*$/, "", crosver))
                crosvers[length(crosvers)] = crosver
            
            bestmatch = length(crosvers)-1
        }
        sub(/refs\/heads\//, "", $2) {
            if ($2 ~ "^release-R[0-9]*-" crosvers[length(crosvers)-1] "([^0-9].*)*$") {
                print $2
                exit
            }
            for (i = 0; i <= bestmatch; i++) {
                if ($2 ~ "^stabilize-" crosvers[i] "([^0-9].*)*$") {
                    out = ((i < bestmatch) ? "" : out) $2 "\n"
                    bestmatch = i
                }
            }
        }
        END { printf "%s", out; }
    ' adhd.refs | sort -V | tail -n 1`"