github.com/BarDweller/libpak@v0.0.0-20230630201634-8dd5cfc15ec9/sherpa/config.go (about) 1 /* 2 * Copyright 2018-2020 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * https://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package sherpa 18 19 import ( 20 "io" 21 22 "github.com/buildpacks/libcnb" 23 ) 24 25 // Config is an object that contains configurable properties for execution. 26 type Config struct { 27 arguments []string 28 execdWriter io.Writer 29 exitHandler libcnb.ExitHandler 30 } 31 32 // Option is a function for configuring a Config instance. 33 type Option func(config Config) Config 34 35 // WithArguments creates an Option that sets a collection of arguments. 36 func WithArguments(arguments []string) Option { 37 return func(config Config) Config { 38 config.arguments = arguments 39 return config 40 } 41 } 42 43 // WithExecdWriter creates an Option that sets an exec.d Writer implementation. 44 func WithExecdWriter(writer io.Writer) Option { 45 return func(config Config) Config { 46 config.execdWriter = writer 47 return config 48 } 49 } 50 51 // WithExitHandler creates an Option that sets an ExitHandler implementation. 52 func WithExitHandler(exitHandler libcnb.ExitHandler) Option { 53 return func(config Config) Config { 54 config.exitHandler = exitHandler 55 return config 56 } 57 }