Git统计代码变化率

统计2017-03-01到2017-03-31代码变更率

代码统计命令参考：git log --pretty=tformat: --since ==2017-03-01 --until=2017-03-31   --numstat | gawk '{ add += $1 ; subs += $2 ; loc += $1 + $2 } END { printf "added lines: %s removed lines : %s total lines: %s\n",add,subs,loc }'