#!/usr/bin/env bash
# Copyright (C) 2017 Luke Shumaker <lukeshu@sbcglobal.net>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

{
	printf '//'
	printf ' %q' "$0" "$@"
	printf '\n// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT\n\n'

	echo package sd_login

	grep -o '//skip:.*' "$1" | cut -d: -f2- | while read -r line; do
		sig=$(echo $(cut -d: -f1 <<<"$line"))
		cal=$(echo $(cut -d: -f2 <<<"$line"))
		cat <<EOF

func (cgroup _Cgroup) Maybe${sig} _Cgroup {
	cgroup, _ = cgroup.${cal}
	return cgroup
}
func (cgroup _Cgroup) Must${sig} _Cgroup {
	cgroup, ok := cgroup.${cal}
	if !ok {
		return ""
	}
	return cgroup
}
EOF
	done
} | gofmt