rc/bin/diffy

   1 #!/bin/rc
   2 # diffy [diff-opts] file... - diff file against yesterday's version(s)
   3 rfork e
   4 diffopts=()
   5 while(! ~ $#* 0 && ~ $1 -* && ! ~ $1 --){
   6         diffopts=($diffopts $1)
   7         shift
   8 }
   9 if(~ $1 --)
  10         shift
  11 if(! ~ $#* 1)
  12         diffopts=($diffopts -m)
  13 for(f)
  14         diff $diffopts `{yesterday $f} $f