githubの差分から拡張子が何のもの何行かをみる

alias gdext='git diff main --numstat | awk "{split(\$3,a,\".\"); if(length(a)>1){ext=a[length(a)]; count[ext]+=\$1+\$2}} END {for(e in count) print e, count[e]}" | sort -k2 -nr'