#!/bin/sh
#
destination=FETCH_HEAD

merge_repo=$1
merge_name=${2:-HEAD}
if [ "$2" = "tag" ]; then
	merge_name="refs/tags/$3"
	destination="$merge_name"
fi

: ${GIT_DIR=.git}
: ${GIT_OBJECT_DIRECTORY="${SHA1_FILE_DIRECTORY-"$GIT_DIR/objects"}"}

download_one () {
	# remote_path="$1" local_file="$2"
	case "$1" in
	http://*)
		wget -q -O "$2" "$1" ;;
	/*)
		test -f "$1" && cat >"$2" "$1" ;;
	*)
		rsync -L "$1" "$2" ;;
	esac
}

download_objects () {
	# remote_repo="$1" head_sha1="$2"
	case "$1" in
	http://*)
		git-http-pull -a "$2" "$1/"
		;;
	/*)
		git-local-pull -l -a "$2" "$1/"
		;;
	*)
		rsync -avz --ignore-existing \
			"$1/objects/." "$GIT_OBJECT_DIRECTORY"/.
		;;
	esac
}

echo "Getting remote $merge_name"
download_one "$merge_repo/$merge_name" "$GIT_DIR/$destination" || exit 1

echo "Getting object database"
download_objects "$merge_repo" "$(cat "$GIT_DIR/$destination")" || exit 1