RPM Package Manager, CVS Repository
  http://rpm5.org/cvs/
  ____________________________________________________________________________

  Server: rpm5.org                         Name:   Per Øyvind Karlsen
  Root:   /v/rpm/cvs                       Email:  pkarlsen@rpm5.org
  Module: rpm                              Date:   09-Dec-2007 05:46:16
  Branch: rpm-4_5                          Handle: 2007120904461600

  Modified files:           (Branch: rpm-4_5)
    rpm/scripts             gendiff

  Log:
    Add some undocumented feature to gendiff

  Summary:
    Revision    Changes     Path
    1.1.2.3     +30 -7      rpm/scripts/gendiff
  ____________________________________________________________________________

  patch -p0 <<'@@ .'
  Index: rpm/scripts/gendiff
  ============================================================================
  $ cvs diff -u -r1.1.2.2 -r1.1.2.3 gendiff
  --- rpm/scripts/gendiff	18 Jun 2007 16:32:24 -0000	1.1.2.2
  +++ rpm/scripts/gendiff	9 Dec 2007 04:46:16 -0000	1.1.2.3
  @@ -1,21 +1,44 @@
   #!/bin/sh
   
  -[ -z "$1" -o -z "$2" ] && {
  -# usage
  +function usage () {
     echo "usage: $0 <directory> <diff-extension>" 1>&2
     exit 1
   }
   
   : ${DIFF:=diff -p}
   
  -find $1 \( -name "*$2" -o -name ".*$2" \) -print |
  +if [ "$1" = "-p" -a -z "$3" ];then
  +	echo "With -p you need to give the definition of patch (like dummy)"
  +	exit 1
  +fi
  +
  +if [ "$1" = "-p" ];then
  +    DEFAULT_PATCH="$2"
  +    shift;
  +	shift;
  +fi
  +
  +[ -z "$1" ] && usage
  +
  +[ -z "$PATCH_PREFIX" -a -z "$2" ] && {
  +  echo "usage: $0 <directory> <diff-extension>" 1>&2
  +  exit 1
  +}    
  +
  +if [ -n "$DEFAULT_PATCH" -a "$RPM" ];then
  +    FILEPATCH="$RPM/SOURCES/$(echo $1|sed 's@/@@g')-$DEFAULT_PATCH.patch"
  +    [ -f $FILEPATCH ] && mv -f $FILEPATCH $FILEPATCH.old
  +fi
  +
  +[ -n "$2" ] && PATCH_PREFIX=$2
  +
  +find $1 \( -name "*$PATCH_PREFIX" -o -name ".*$PATCH_PREFIX" \) -print |
   while read f; do
       U=-u
       [ "`basename $f`" = "ChangeLog$2" ] && U=-U0
  -#    ${DIFF}  ${U} $f `echo $f | sed s/$2\$//`
  -    if [ -r "$f" ]; then
  -	${DIFF}  ${U} "${f}" "${f%$2}"
  +    if [ -z "$DEFAULT_PATCH" ];then
  +	${DIFF} ${U} $f `echo $f | sed s/$PATCH_PREFIX\$//`
       else
  -	${DIFF}  ${U} /dev/null "${f%$2}"
  +    ${DIFF} ${U} $f `echo $f | sed s/$PATCH_PREFIX\$//`|tee -a $FILEPATCH
       fi
   done
  @@ .