display stats (first, last commit, num of commits, lines +/-) about each git author on the master branch

git author stats

git log master --shortstat --format='commit %ct %aN' |\
perl -MDate::Format -ne '
 if(/(\d+) insertion.* (\d+) deletion/){
  $s{$N}->{"add"}+=$1;
  $s{$N}->{"del"}+=$2;
  $s{$N}->{"com"}++;
 }elsif(/^commit (\d+) (.+)/){
  $t=$1;
  $N=$2; $N=~s/ /_/g;
  if($first{$N}>$t or !$first{$N}){ $first{$N}=$t };
  $last{$N}<$t and $last{$N}=$t;
 }
 END{
  printf "%-50s  %s %s\t%4d\t%5d\t%5d\n",
   $_, time2str("%Y-%m-%d", $first{$_}), time2str("%Y-%m-%d", $last{$_}), $s{$_}->{"com"},$s{$_}->{"add"},$s{$_}->{"del"}
   for keys %s;
 }'