markdownの[^なんとか]の形式を上から連番にするシェル芸

mark_ref_conv.sh

adjust_md_refs () {
    local _tmp_file="/tmp/$$.adjust_md_refs"
    cat "$1" | grep -oP '\[\^[^\[]*?\](?!:)' | while read s; do echo "$s" | awk '{print "s/"$1"/[^'$(cat /dev/urandom| LANG=C tr -dc 'A-Za-z0-9' | fold -w 10 | head -n 1)']/g"}' ;done | perl -pe 's/[\[\]]/\\$&/g' | sed -f - "$1" > "$_tmp_file"
    cat "$_tmp_file" | grep -oP '\[\^[^\[]*?\](?!:)' | awk '{print "s/"$1"/[^"NR"]/g"}' | perl -pe 's/[\[\]]/\\$&/g' | sed -f - "$_tmp_file"
    rm "$_tmp_file"
}