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annotate cmd/sievemgr/internal/config/config.go @ 22:fc5e6970a0d5 default tip

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Add support for specifying an authorization identity on the command line
author Guido Berhoerster <guido+sievemgr@berhoerster.name>
date Wed, 17 Feb 2021 07:50:55 +0100
parents 4dff4c3f0fbb
children
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5
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1 // Copyright (C) 2020 Guido Berhoerster <guido+sievemgr@berhoerster.name>
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2 //
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3 // Permission is hereby granted, free of charge, to any person obtaining
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4 // a copy of this software and associated documentation files (the
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5 // "Software"), to deal in the Software without restriction, including
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6 // without limitation the rights to use, copy, modify, merge, publish,
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7 // distribute, sublicense, and/or sell copies of the Software, and to
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8 // permit persons to whom the Software is furnished to do so, subject to
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9 // the following conditions:
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10 //
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11 // The above copyright notice and this permission notice shall be included
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12 // in all copies or substantial portions of the Software.
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13 //
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14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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15 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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17 // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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18 // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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19 // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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20 // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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21
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22 package config
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23
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24 import (
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25 "bufio"
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26 "bytes"
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27 "fmt"
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28 "os"
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29 "path/filepath"
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30 )
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31
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32 const bom = '\ufeff'
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33
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34 type ParserError struct {
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35 Message string
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36 LineNo int
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37 }
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38
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39 func (e *ParserError) Error() string {
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40 if e.LineNo > 0 {
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41 return fmt.Sprintf("error in line %d: %s", e.LineNo, e.Message)
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42 }
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43 return e.Message
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44 }
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45
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46 func NewParserError(message string, lineNo int) *ParserError {
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47 return &ParserError{message, lineNo}
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48 }
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49
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50 type Configuration struct {
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51 Accounts []*Account
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52 Default *Account
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53 }
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54
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55 type Account struct {
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56 Name string
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57 Host string
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58 Port string
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59 User string
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60 Password string
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61 Insecure bool
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62 }
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63
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64 func Parse(data []byte, conf *Configuration) error {
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65 rd := bytes.NewReader(data)
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66 s := newScanner(bufio.NewReader(rd))
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67 p := &parser{s: s}
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68 return p.parse(conf)
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69 }
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70
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71 func DefaultFilename() (string, error) {
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72 dir, err := os.UserConfigDir()
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73 if err != nil {
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74 return "", fmt.Errorf("failed to determine the name of the configuration file: %s", err)
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75 }
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76 return filepath.Join(dir, "sievemgr", "sievemgr.conf"), nil
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77 }
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78
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79 func ParseFile(filename string, conf *Configuration) error {
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80 f, err := os.Open(filename)
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81 if os.IsNotExist(err) {
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82 return nil
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83 } else if err != nil {
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84 return fmt.Errorf("failed to open configuration file: %s", err)
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85 }
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86 defer f.Close()
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87
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88 // configutaion file must be a regular file with no more than 0600
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89 // permissions
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90 info, err := f.Stat()
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91 if err != nil {
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92 return fmt.Errorf("failed to stat configuration file: %s", err)
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93 }
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94 mode := info.Mode()
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95 if !mode.IsRegular() {
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96 return fmt.Errorf("configuration file is not a regular file")
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97 }
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98 if perm := mode.Perm(); perm&0077 != 0 {
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99 return fmt.Errorf("permissions %04o on configuration file are too open", perm)
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100 }
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101
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102 s := newScanner(bufio.NewReader(f))
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103 p := &parser{s: s}
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104 return p.parse(conf)
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105 }