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annotate cmd/sievemgr/main.go @ 8:8caacf702c0d

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Add edit subcommand for interactive editing of a script
author Guido Berhoerster <guido+sievemgr@berhoerster.name>
date Fri, 13 Nov 2020 10:49:08 +0100
parents 3abc8be485c0
children 44c07eb8ef08
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0cd5a454dfb4 Add README file
Guido Berhoerster <guido+sievemgr@berhoerster.name>
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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 cmdCheckSpace,
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72 cmdRename,
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73 cmdEdit,
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74 }
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75
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76 func usage() {
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77 fmt.Fprintf(flag.CommandLine.Output(),
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78 "usage:\n %s [options] [subcommand [options] [arguments]]\n",
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79 flag.CommandLine.Name())
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80 fmt.Fprintln(flag.CommandLine.Output(), "subcommands:")
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81 for _, cmd := range cmds {
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82 fmt.Fprintf(flag.CommandLine.Output(), " %s\n", cmd.Name())
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83 }
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84 fmt.Fprintln(flag.CommandLine.Output(), "global options:")
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85 flag.PrintDefaults()
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86 }
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87
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88 func main() {
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89 flag.Usage = usage
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90 flag.StringVar(&confFilename, "f", confFilename,
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91 "Set the name of the configuration file")
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92 flag.Parse()
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93 if flag.NArg() == 0 {
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94 fmt.Fprintln(flag.CommandLine.Output(), "missing subcommand")
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95 usage()
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96 os.Exit(exitUsage)
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97 }
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98
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99 if err := config.ParseFile(confFilename, &conf); err != nil {
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100 fmt.Fprintln(flag.CommandLine.Output(), err)
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101 os.Exit(exitFailure)
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102 }
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103
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104 name := flag.Arg(0)
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105 var cmd *command
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106 for _, c := range cmds {
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107 if c.Name() == name {
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108 cmd = c
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109 break
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110 }
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111 }
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112 if cmd == nil {
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113 fmt.Fprintf(flag.CommandLine.Output(),
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114 "unknown subcommand %q\n", name)
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115 usage()
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116 os.Exit(exitUsage)
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117 }
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118
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119 cmd.Flag.Init(cmd.Name(), flag.ExitOnError)
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120 cmd.Flag.Usage = cmd.Usage
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121 args := flag.Args()
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122 if err := cmd.Flag.Parse(args[1:]); err != nil {
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123 fmt.Fprintln(flag.CommandLine.Output(), err)
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124 os.Exit(exitFailure)
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125 }
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126
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127 if err := cmd.Run(cmd, cmd.Flag.Args()); err != nil {
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128 fmt.Fprintln(flag.CommandLine.Output(), err)
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129
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130 var uerr usageError
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131 if errors.As(err, &uerr) {
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132 cmd.Usage()
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133 os.Exit(exitUsage)
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134 }
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135
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136 os.Exit(exitFailure)
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137 }
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138 }