git log --shortstat

updated: 增加其他統計，不過好難一次統計好... 可能要再試試

我最愛（寫）one-liner. 寫法是用 irb 慢慢串 method, 不難

   1  $stdin.read.scan(/.*\n\n.*/).map{|i|i=~/(.*)\n\n (\d+).*(\d+).*(\d+)/;[$1,$2,$3,$4]}.inject(Hash.new([0]*3)){|h,i|h[i.first]=i[1..-1].map(&:to_i).zip(h[i.first]).map{|n|n.inject(0,&:+)};h}.each{|k,v|printf "%12s changed %4d files, inserted %4d lines, deleted %4d lines.\n",k,*v

godfat ~/p/g/photos> git log --pretty=tformat:%an --shortstat --no-merges | ruby1.9 -e '$stdin.read.scan(/.*\n\n.*/).map{|i|i=~/(.*)\n\n (\d+).*(\d+).*(\d+)/;[$1,$2,$3,$4]}.inject(Hash.new([0]*3)){|h,i|h[i.first]=i[1..-1].map(&:to_i).zip(h[i.first]).map{|n|n.inject(0,&:+)};h}.each{|k,v|printf "%12s changed %4d files, inserted %4d lines, deleted %4d lines.\n",k,*v}'

Lin Jen-Shin changed  892 files, inserted  925 lines, deleted  855 lines.
     unknown changed  193 files, inserted  317 lines, deleted  327 lines.
      godfat changed 5156 files, inserted 3635 lines, deleted 3541 lines.
    charlesc changed  519 files, inserted  961 lines, deleted  960 lines.
      scrazy changed  528 files, inserted  237 lines, deleted  177 lines.
        wang changed  515 files, inserted  947 lines, deleted  824 lines.
        root changed 1891 files, inserted  284 lines, deleted  210 lines.

godfat ~/p/g/photos> git shortlog -s

   381  Lin Jen-Shin
   329  charlesc
  1445  godfat
   143  photos
    98  root
    90  scrazy
   124  unknown
   397  wang

計算 git log title 的 wc, 去除 git-svn-id 等等
（wc 是 lines, words, bytes. 然後這邊用 binary 去算是因為，
裡面有一個 message subject 是一堆亂碼，可能是 big5?
然後由於抓不出 body, 所以只能算 subject 長度... 我好幾個
可是有寫滿長的 commit log body, 這樣算不出來 @@）

godfat ~/p/g/photos> git shortlog --no-merges | ruby1.9 -e '$stdin.read.force_encoding("binary").gsub(/[ ]+git-svn-id:.*/, "").squeeze("\n").scan(/(.* \(\d+\):\n([ ]+.*\n)*)/).each{|i|i.first.lines.to_a.tap{|l|IO.popen("wc","r+"){|wc|wc.write(l[1..-1].join);wc.close_write;printf "%12s %s",l.first,wc.read}}}'

Lin Jen-Shin (331):
      331    2189   15676
charlesc (319):
      319     599    5586
godfat (1180):
     1180    9345   67739
 root (98):
       47     224    1653
scrazy (90):
       89     339    2801
unknown (117):
      117     236    2121
wang (397):
       36     191    1345