#!/bin/bash
#
# This file is part of the LibreOffice project.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.
#

# For ODF, there is flat ODF, but for other XML-based zipped formats, you have
# to unpack the archive and compare each file manually.
#
# This script tries to automate that: you can diff archive contents as well XML
# contents as well.

# Allow symlinking to ~/bin while still finding formatxml next to us in the original location.
mydir=$(dirname $0)
[ -h $0 ] && mydir=$(dirname $(readlink $0))

unpack()
{
    mkdir $1
    cd $1
    unzip -q $2
    if [ -z "$filesOnly" ]; then
        for i in $(find . -name "*.xml" -o -name "*.rels")
        do
            $mydir/formatxml "$i" > "$i-new"
            mv -f "$i-new" "$i"
        done
    fi
    cd ..
}

filesOnly=
if [ "$1" = "-f" ]; then
    shift
    filesOnly=t
fi

if [ -z "$1" -o -z "$2" ]; then
    echo "usage: zipdiff [-f] onefile otherfile"
    echo
    echo "-f    diff only the list of files, not their contents"
    exit 1
fi

a=$(realpath $1)
b=$(realpath $2)
workdir=$(mktemp -d)
cd $workdir
unpack a $a
unpack b $b

if [ -n "$filesOnly" ]; then
    find a -mindepth 1 |sed 's|^a/||' |sort > a-list
    find b -mindepth 1 |sed 's|^b/||' |sort > b-list
    diff -u a-list b-list
else
    diff -Nur a b
fi
rm -rf $workdir

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