gendiff

   1 #!/bin/sh
   2
   3 [ -z "$1" -o -z "$2" ] && {
   4 # usage
   5   echo "usage: $0 <directory> <diff-extension>" 1>&2
   6   exit 1
   7 }
   8
   9 find $1 \( -name "*$2" -o -name ".*$2" \) -print |
  10 while read f; do
  11     U=-u
  12     [ "${f##*/}" = "ChangeLog$2" ] && U=-U0
  13     diff ${U} $f `echo $f | sed s/$2\$//`
  14 done