#!/bin/bash

if [ $# -ne 3 ] ; then
  echo "usage : transdiffer <old-revision> <new-revision> <out-file>"
  exit 1;
fi

let oldrev=$1+0
let newrev=$2+0
outfile=$3
mailfile="$3-email.txt"
olddir=`pwd`
svnurl="http://svn.cocoondev.org/viewsvn/"
svnbase="http://svn.cocoondev.org/repos/daisy/trunk/daisy/"
trunkbase="trunk/daisy/"
urlbase=${svnurl}${trunkbase}
url=""

echo -e "Diffs\n\n" > $outfile
echo -e "Diffs - email\n" > $mailfile

while read line  ; do

# Find if a first revision is specified
  let first_rev=`echo "${line}" | cut -s -d \  -f 2`+0
  line=`echo "${line}" | cut -d \  -f 1`
# Before rev 2328 the cocoon/forms was cforms
  if [ $oldrev -lt 2328 ] ; then
    oldline=`echo ${line} | sed -e "s/cocoon\/forms/cforms/"`
  else
    oldline=$line
  fi

  if [ -n "$first_rev" ] && [ $oldrev -lt $first_rev ] ; then


    if [ "${line}" == "${oldline}" ]; then

      diff=`svn di --notice-ancestry -N --old ${oldline}@${first_rev} --new ${line}@${newrev}`
      url="${urlbase}${line}?rev=${newrev}&view=markup"
#      echo "line = oldline : $line = $oldline"
#      echo "svn di --notice-ancestry -N --old ${oldline}@${first_rev} --new ${line}@${newrev}"
    else
      tmpbase1=`echo $oldline | sed -e "s/cforms\/.*/cforms\//"`
      tmpbase2=`echo $line | sed -e "s/cocoon\/forms\/.*/cocoon\/forms\//"`
      tmptail=`echo $oldline | sed -e "s/.*cforms\///"`
      diff=`svn di -r ${first_rev}:${newrev} --notice-ancestry -N --old ${svnbase}${tmpbase1} --new ${tmpbase2} ${tmptail}`
      oldurl=${trunkbase}${oldline}
      url="${urlbase}${line}?p1=${oldurl//\//%2F}&rev=2328&r1=${first_rev}&r2=${newrev}"
#      echo "line  != oldline : $line != $oldline"
#      echo "svn di -r ${oldrev}:${newrev} --notice-ancestry -N --old ${svnbase}${tmpbase1} --new ${tmpbase2} ${tmptail}"

    fi

  else

    if [ "${line}" == "${oldline}" ]; then

      diff=`svn di --notice-ancestry -N --old ${oldline}@${oldrev} --new ${line}@${newrev}`
      url="${urlbase}${line}?r1=text&tr1=${oldrev}&r2=text&tr2=${newrev}&diff_format=h"
#      echo "line = oldline : $line = $oldline"
#      echo "svn di --notice-ancestry -N --old ${oldline}@${oldrev} --new ${line}@${newrev}"
    else
      tmpbase1=`echo $oldline | sed -e "s/cforms\/.*/cforms\//"`
      tmpbase2=`echo $line | sed -e "s/cocoon\/forms\/.*/cocoon\/forms\//"`
      tmptail=`echo $oldline | sed -e "s/.*cforms\///"`
      diff=`svn di -r ${oldrev}:${newrev} --notice-ancestry -N --old ${svnbase}${tmpbase1} --new ${tmpbase2} ${tmptail}`
      oldurl=${trunkbase}${oldline}
      url="${urlbase}${line}?p1=${oldurl//\//%2F}&rev=2328&r1=${oldrev}&r2=${newrev}"
#      echo "line  != oldline : $line != $oldline"
#      echo "svn di -r ${oldrev}:${newrev} --notice-ancestry -N --old ${svnbase}${tmpbase1} --new ${tmpbase2} ${tmptail}"

    fi
  fi

  if [ -n "$diff" ]; then

    echo $url >> $mailfile
    echo $line
    echo -e "\n\n##############\n" >> $outfile
    echo -e "$line" >> $outfile
    echo -e "$diff" >> $outfile

  fi
done

cd $olddir