#!/bin/sh
# SPDX-License-Identifier: CC0-1.0
# SPDX-FileCopyrightText: 2012, Bruno De Fraine

# This file is in the public domain.
#
# Code from: http://www.defraine.net/~brunod/fmdiff/
#
# Wrapper script to use FileMerge as a diff-cmd in Subversion
#

FM="/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge"
FMDIFF="$(basename $0)"
GN="/usr/local/bin/growlnotify"

while [ $# != 0 ]; do
        case $1 in
                -u)
                        unified=1
                ;;
                -L)
                        shift
                        if [ -z "$leftlabel" ]; then
                                leftlabel=$1
                        elif [ -z "$rightlabel" ]; then
                                rightlabel=$1
                        else
                                echo "Too many labels" 1>&2
                                exit 2
                        fi
                ;;
                -*)
                        echo "Unknown option: $1" 1>&2
                        exit 2
                ;;
                *)
                        if [ -z "$leftfile" ]; then
                                leftfile=$1
                        elif [ -z "$rightfile" ]; then
                                rightfile=$1
                        else
                                echo "Too many files to diff" 1>&2
                                exit 2
                        fi
        esac
        shift
done

if [ -z "$leftfile" ] || [ -z "$rightfile" ]; then
        echo "Usage: $FMDIFF [options] leftfile rightfile" 1>&2
        exit 2
fi

function labels {
        [ -n "$leftlabel"  ] && echo  Left: $leftlabel
        [ -n "$rightlabel" ] && echo Right: $rightlabel
}

echo Starting FileMerge... 1>&2
labels 1>&2
if [ -x "$GN" ]; then
        labels | "$GN" -n "$FMDIFF" "Starting FileMerge"
fi

exec "$FM" -left "$leftfile" -right "$rightfile"