#!/bin/sh

#
# Wrapper script to use FileMerge as a merge-tool-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
		-*)
			echo "Unknown option: $1" 1>&2
			exit 1
		;;
		*)
			if [ -z "$ancestorfile" ]; then
				ancestorfile="$1"
			elif [ -z "$leftfile" ]; then
				leftfile="$1"
			elif [ -z "$rightfile" ]; then
				rightfile="$1"
			elif [ -z "$mergefile" ]; then
				mergefile="$1"
			else
				echo "Too many files to start merge" 1>&2
				exit 2
			fi
	esac
	shift
done

if [ -z "$ancestorfile" ] || [ -z "$leftfile" ] ||
	  [ -z "$rightfile" ] || [ -z "$mergefile" ]; then
	echo "Usage: $0 [options] oldfile yourfile myfile outputfile" 1>&2
	exit 2
fi

echo Starting FileMerge... 1>&2
[ -x "$GN" ] && "$GN" -a FileMerge -n "$FMDIFF" -m "$mergefile" "Starting FileMerge"

[[ "$mergefile" == */* ]] || mergefile="./$mergefile"
exec "$FM" -left "$leftfile" -right "$rightfile" \
	-ancestor "$ancestorfile" -merge "$mergefile"