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iediff    56 lines (50 with data), 1.6 kB

#!/usr/bin/env bash
# iediff.sh - Simple wrapper around ieparse and diff
# Copyright (C) 2010 by Jaka Kranjc, <lynxlupodian@users.sf.net>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

function usage ()
{
  echo "$(basename $0) [options to diff] FILE1 FILE2"
  echo "Set IEPARSE to point to your ieparse.py if you have it somewhere special."
  echo "Set PAGER to less or some other pager if you don't have it set."
  exit 1
}

IEPARSE="$(dirname $0)/ieparse.py"

for i in $@; do
  if [[ -f $i ]]; then
    if [[ -z $FILE1 ]]; then
      FILE1="$i"
      continue
    fi
    if [[ -z $FILE2 ]]; then
      FILE2="$i"
      continue
    fi
    usage
  else
    DIFFOPTS="$DIFFOPTS $i"
  fi
done

if [[ -z $FILE1 || -z $FILE2 ]]; then
  usage
fi
if [[ -z $DIFFOPTS ]]; then
  DIFFOPTS="-aus"
fi
if [[ -z $PAGER ]]; then
  PAGER=cat
fi

diff "$DIFFOPTS" <($IEPARSE "$FILE1") <($IEPARSE "$FILE2") | $PAGER || exit 2