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annotate cmd/sievemgr/main.go @ 5:4dff4c3f0fbb

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Introduce configuration file where account information is specified Introduce a configuration file where account information must be specified instead of passing it with each invocation on the command line. Each account has a name by which it can be selected and one may be specified as the default account. This is intended to improve usability for productive usage. Enforce strict permissions since passwords may be specified for non-interactive usage. Remove command-line flags for passing account information.
author Guido Berhoerster <guido+sievemgr@berhoerster.name>
date Tue, 03 Nov 2020 23:44:45 +0100
parents f925f15d8ce5
children 2130614cd64a
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0cd5a454dfb4 Add README file
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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 main
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23
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24 import (
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25 "errors"
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26 "flag"
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27 "fmt"
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28 "os"
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29
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30 "go.guido-berhoerster.org/sievemgr/cmd/sievemgr/internal/config"
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31 )
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32
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33 const (
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34 exitSuccess = iota
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35 exitFailure
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36 exitUsage
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37 )
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38
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39 type usageError string
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40
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41 func (e usageError) Error() string {
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42 return string(e)
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43 }
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44
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45 // command-line flags
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46 var (
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47 confFilename string
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48 acctName string
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49 )
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50
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51 var conf config.Configuration
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52
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53 func init() {
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54 var err error
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55 confFilename, err = config.DefaultFilename()
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56 if err != nil {
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57 fmt.Fprintln(flag.CommandLine.Output(), err)
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58 os.Exit(exitFailure)
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59 }
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60 }
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61
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62 var cmds = []*command{
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63 cmdList,
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64 cmdPut,
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65 cmdGet,
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66 cmdActivate,
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67 cmdDeactivate,
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68 cmdDelete,
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69 cmdInfo,
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70 cmdCheck,
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71 }
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72
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73 func usage() {
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74 fmt.Fprintf(flag.CommandLine.Output(),
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75 "usage:\n %s [options] [subcommand [options] [arguments]]\n",
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76 flag.CommandLine.Name())
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77 fmt.Fprintln(flag.CommandLine.Output(), "subcommands:")
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78 for _, cmd := range cmds {
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79 fmt.Fprintf(flag.CommandLine.Output(), " %s\n", cmd.Name())
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80 }
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81 fmt.Fprintln(flag.CommandLine.Output(), "global options:")
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82 flag.PrintDefaults()
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83 }
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84
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85 func main() {
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86 flag.Usage = usage
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87 flag.StringVar(&confFilename, "f", confFilename,
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88 "Set the name of the configuration file")
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89 flag.Parse()
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90 if flag.NArg() == 0 {
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91 fmt.Fprintln(flag.CommandLine.Output(), "missing subcommand")
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92 usage()
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93 os.Exit(exitUsage)
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94 }
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95
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96 if err := config.ParseFile(confFilename, &conf); err != nil {
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97 fmt.Fprintln(flag.CommandLine.Output(), err)
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98 os.Exit(exitFailure)
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99 }
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100
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101 name := flag.Arg(0)
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102 var cmd *command
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103 for _, c := range cmds {
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104 if c.Name() == name {
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105 cmd = c
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106 break
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107 }
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108 }
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109 if cmd == nil {
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110 fmt.Fprintf(flag.CommandLine.Output(),
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111 "unknown subcommand %q\n", name)
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112 usage()
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113 os.Exit(exitUsage)
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114 }
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115
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116 cmd.Flag.Init(cmd.Name(), flag.ExitOnError)
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117 cmd.Flag.Usage = cmd.Usage
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118 args := flag.Args()
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119 if err := cmd.Flag.Parse(args[1:]); err != nil {
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120 fmt.Fprintln(flag.CommandLine.Output(), err)
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121 os.Exit(exitFailure)
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122 }
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123
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124 if err := cmd.Run(cmd, cmd.Flag.Args()); err != nil {
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125 fmt.Fprintln(flag.CommandLine.Output(), err)
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126
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127 var uerr usageError
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128 if errors.As(err, &uerr) {
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129 cmd.Usage()
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130 os.Exit(exitUsage)
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131 }
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132
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133 os.Exit(exitFailure)
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134 }
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135 }