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annotate cmd/sievemgr/edit.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 29769b9e2f09
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 "fmt"
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26 "io"
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27 "io/ioutil"
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28 "os"
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29 "os/exec"
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30 "path/filepath"
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31 "runtime"
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32 "strings"
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33
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34 "go.guido-berhoerster.org/managesieve"
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35 "go.guido-berhoerster.org/sievemgr/cmd/sievemgr/internal/config"
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36 "golang.org/x/term"
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37 )
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38
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39 func init() {
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40 cmdEdit.Flag.StringVar(&acctName, "a", "", "Select the account")
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41 cmdEdit.Flag.StringVar(&authzID, "A", "", "Specify the authorization identity")
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42 }
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43
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44 var cmdEdit = &command{
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45 UsageLine: "edit [options] name",
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46 Run: runEdit,
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47 }
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48
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49 func promptYesNo(prompt string) (yesNo bool, err error) {
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50 var tty *os.File
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51 var r io.Reader
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52 var w io.Writer
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53 if runtime.GOOS == "windows" {
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54 r = os.Stdin
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55 w = os.Stdout
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56 } else {
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57 tty, err = os.OpenFile("/dev/tty", os.O_RDWR, 0666)
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58 if err != nil {
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59 return
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60 }
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61 r = tty
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62 w = tty
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63 defer tty.Close()
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64 }
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65
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66 for {
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67 io.WriteString(w, prompt)
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68
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69 var response string
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70 _, err = fmt.Fscanln(r, &response)
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71 if err != nil {
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72 err = fmt.Errorf("failed to read response: %s", err)
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73 return
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74 }
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75
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76 switch strings.ToLower(response) {
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77 case "y", "yes":
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78 yesNo = true
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79 return
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80 case "n", "no":
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81 return
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82 }
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83 }
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84 }
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85
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86 func getScript(acct *config.Account, scriptName string) (string, error) {
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87 c, err := dialPlainAuth(acct)
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88 if err != nil {
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89 return "", err
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90 }
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91 defer c.Logout()
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92
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93 return c.GetScript(scriptName)
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94 }
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95
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96 func readScript(filename string) (string, error) {
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97 f, err := os.Open(filename)
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98 if err != nil {
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99 return "", err
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100 }
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101 defer f.Close()
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102
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103 return readLimitedString(f, managesieve.ReadLimit)
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104 }
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105
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106 func putScript(acct *config.Account, scriptName, script string) (string, error) {
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107 c, err := dialPlainAuth(acct)
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108 if err != nil {
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109 return "", err
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110 }
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111 defer c.Logout()
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112
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113 return c.PutScript(scriptName, script)
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114 }
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115
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116 func runEdit(cmd *command, args []string) error {
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117 if len(args) != 1 {
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118 return usageError("invalid number of arguments")
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119 }
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120
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121 scriptName := args[0]
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122
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123 if !term.IsTerminal(int(os.Stdin.Fd())) ||
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124 !term.IsTerminal(int(os.Stdout.Fd())) {
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125 return fmt.Errorf("the edit subcommand can only be used interactively\n")
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126 }
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127
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128 editor := os.Getenv("EDITOR")
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129 if editor == "" {
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130 return fmt.Errorf("EDITOR environment variable not set")
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131 }
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132
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133 acct, err := getAccount(&conf, acctName)
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parents:
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134 if err != nil {
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135 return err
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parents:
diff changeset
136 }
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parents:
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137
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138 if err := lookupHostPort(acct); err != nil {
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139 return err
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parents:
diff changeset
140 }
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141
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142 if err := readPassword(acct); err != nil {
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143 return err
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parents:
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144 }
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145
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146 c, err := dialPlainAuth(acct)
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147 if err != nil {
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148 return err
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149 }
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150 defer c.Logout()
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151
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152 script, err := getScript(acct, scriptName)
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153 if err != nil {
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154 return err
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parents:
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155 }
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156
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157 tmpDir, err := ioutil.TempDir(os.TempDir(), "sievemgr*")
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158 if err != nil {
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159 return fmt.Errorf("failed to create temporary directory: %s", err)
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parents:
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160 }
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parents:
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161
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162 tmpFile := filepath.Join(tmpDir, scriptName)
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parents:
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163 if err = ioutil.WriteFile(tmpFile, []byte(script), 0640); err != nil {
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parents:
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164 return fmt.Errorf("failed to create script file: %s", err)
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parents:
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165 }
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parents:
diff changeset
166 defer func() {
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parents:
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167 // show filename if an error has occured and the file is
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168 // preserved
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169 if tmpFile != "" {
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
170 fmt.Fprintf(os.Stderr,
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parents:
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171 "the script has been preserved as %s\n",
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parents:
diff changeset
172 tmpFile)
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parents:
diff changeset
173 }
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
174 }()
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parents:
diff changeset
175
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parents:
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176 // modification time is used to detect changes
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
177 info, err := os.Stat(tmpFile)
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parents:
diff changeset
178 if err != nil {
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parents:
diff changeset
179 return fmt.Errorf("failed to stat file: %s", err)
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
180 }
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
181 origModTime := info.ModTime()
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parents:
diff changeset
182
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parents:
diff changeset
183 for {
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
184 cmd := exec.Command(editor, tmpFile)
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
185 cmd.Stdin = os.Stdin
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parents:
diff changeset
186 cmd.Stdout = os.Stdout
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parents:
diff changeset
187 cmd.Stderr = os.Stderr
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
188 if err := cmd.Run(); err != nil {
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
189 return fmt.Errorf("failed to run editor: %s", err)
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
190 }
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
191
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
192 // quit if the script has not been changed
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
193 if info, err := os.Stat(tmpFile); err != nil {
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
194 return fmt.Errorf("failed to stat file: %s", err)
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
195 } else if info.ModTime() == origModTime {
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
196 fmt.Fprintln(os.Stderr, "aborting, script was not modified")
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
197 break
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
198 }
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parents:
diff changeset
199
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
200 script, err = readScript(tmpFile)
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
201 if err != nil {
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
202 return fmt.Errorf("failed to read script: %s", err)
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
203 }
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
204
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
205 warnings, err := putScript(acct, scriptName, script)
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
206 if err != nil {
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
207 // show error and try again if the script was rejected
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
208 // by the server
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
209 fmt.Fprintln(os.Stderr, err)
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
210 yesNo, err := promptYesNo("edit again [y/n]? ")
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Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
211 if err != nil {
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
212 return err
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
213 } else if !yesNo {
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
214 return fmt.Errorf("script not saved")
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
215 }
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
216 } else if warnings != "" {
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
217 fmt.Fprintln(os.Stderr, warnings)
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
218 break
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
219 } else {
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
220 break
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
221 }
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
222 }
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
223
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
224 os.RemoveAll(tmpDir)
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
225 tmpFile = ""
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
226
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
227 return nil
8caacf702c0d Add edit subcommand for interactive editing of a script
Guido Berhoerster <guido+sievemgr@berhoerster.name>
parents:
diff changeset
228 }