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#!/bin/bash

# Copyright (C) 2003 Free Software Foundation, Inc.

# 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, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

cat - <<\EOF > /dev/null
Invoke e.g., like this
DU1=du-4.5.2 DU2=du ./du-tests
EOF

test -x "$DU1" || { echo DU1 envvar not set; exit 1; }
test -x "$DU2" || { echo DU2 envvar not set; exit 1; }
# Expects $DU1 and $DU2 to be the binaries to compare.
d1=$(mktemp -d)
cp -a $DU1 $d1/du
d2=$(mktemp -d)
cp -a $DU2 $d2/du

for args in  \
    '-Sa .' \
    '-Sa ../..' \
    '-Sa a' \
    '-Sa /tmp /t' \
    '-Sa /tmp' \
    '/tmp /t' \
    '-a /tmp /t' \
    '-a a' \
    '-ca .' \
    '-ca ..' \
    '-ca ../..' \
    '-ca /tmp /t' \
    '-ca /tmp' \
    '-ca a' \
  ; do
  echo Args: $args ======================
  diff -u --label=$DU1 --label=$DU2 \
    <(PATH=$d1 du $args 2>&1) <(PATH=$d2 du $args 2>&1)
done
rm -rf $d1 $d2