1// Copyright 2018 The Bazel Authors. All rights reserved. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15// Package ini provides utility functions to read and write ini files. 16package ini 17 18import ( 19 "fmt" 20 "io" 21 "io/ioutil" 22 "log" 23 "os" 24 "sort" 25 "strings" 26) 27 28func parse(in string) map[string]string { 29 m := make(map[string]string) 30 lines := strings.Split(in, "\n") 31 for i, l := range lines { 32 l = strings.TrimSpace(l) 33 if len(l) == 0 { 34 // Skip empty line 35 continue 36 } 37 if strings.HasPrefix(l, ";") || strings.HasPrefix(l, "#") { 38 // Skip comment 39 continue 40 } 41 kv := strings.SplitN(l, "=", 2) 42 if len(kv) < 2 { 43 log.Printf("Invalid line in ini file at line:%v %q\n", i, l) 44 // Skip invalid line 45 continue 46 } 47 k := strings.TrimSpace(kv[0]) 48 v := strings.TrimSpace(kv[1]) 49 if ov, ok := m[k]; ok { 50 log.Printf("Overwrite \"%s=%s\", duplicate found at line:%v %q\n", k, ov, i, l) 51 } 52 m[k] = v 53 } 54 return m 55} 56 57func write(f io.Writer, m map[string]string) { 58 var keys []string 59 for k := range m { 60 keys = append(keys, k) 61 } 62 sort.Strings(keys) 63 for _, k := range keys { 64 fmt.Fprintf(f, "%s=%s\n", k, m[k]) 65 } 66} 67 68// Read reads an ini file. 69func Read(n string) (map[string]string, error) { 70 c, err := ioutil.ReadFile(n) 71 if err != nil { 72 return nil, err 73 } 74 return parse(string(c)), nil 75} 76 77// Write writes an ini file. 78func Write(n string, m map[string]string) error { 79 f, err := os.Create(n) 80 if err != nil { 81 return err 82 } 83 defer f.Close() 84 write(f, m) 85 return nil 86} 87