1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/* create.go: help creating a new message
*
* Copyright (C) 2016-2018 Clemens Fries <github-lettersnail@xenoworld.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cmd
import (
"bufio"
"fmt"
"github.com/docopt/docopt.go"
. "github.com/githubert/lettersnail/common"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strings"
"time"
)
var usageCreate =
// tag::create[]
`
Usage:
lettersnail create [--draft=FILE] [options]
Options:
--help Show this help.
--to=ADDR Destination address.
--from=ADDR Sender address.
--subject=ADDR Short subject.
--cc=ADDR Set "Cc".
--bcc=ADDR Set "Bcc".
--reply-to=ADDR Set "Reply-To".
--draft=FILE Use FILE from the drafts/ folder as template.
` // end::create[]
func Create(argv []string, conf *Configuration) {
args, _ := docopt.Parse(usageCreate, argv, true, "", false)
tmpFile, err := ioutil.TempFile("", "lettersnail")
if err != nil {
fmt.Printf("Error while creating temporary file: %s\n", err.Error())
os.Exit(1)
}
// We close the file right away, because we need only its soulless
// shell, mwhaha.
tmpFile.Close()
draftsDir := filepath.Join(conf.Get(CONF_WORKDIR), DIR_DRAFTS)
todoDir := filepath.Join(conf.Get(CONF_WORKDIR), DIR_TODO)
defer os.Remove(tmpFile.Name())
message := NewMessage()
if args["--draft"] != nil {
draft := filepath.Join(draftsDir, args["--draft"].(string))
m, err := NewMessageFromFile(draft)
if err != nil {
fmt.Printf("Error while reading draft: %s\n", err.Error())
os.Exit(1)
}
message = &m
}
message.Conf.MergeWithDocOptArgs(CMD_USAGE, &args)
// MergeWithDocOptArgs will also copy --draft and --help over, but we do not want
// that.
delete(message.Conf.Data, "draft")
delete(message.Conf.Data, "help")
if message.Get("date") == "" {
// Add tomorrow's date.
message.Conf.Set("date", time.Now().AddDate(0, 0, 1).Format(DATE_FORMAT))
}
if message.Get("subject") == "" {
message.Conf.Set("subject", "Type subject here")
}
if len(message.Body) == 0 {
message.Body = append(message.Body, "Add message to the world of tomorrow here.")
}
message.WriteToFile(tmpFile.Name())
editor := editor()
fmt.Printf("Opening %s using %s.\n", tmpFile.Name(), editor)
cmd := exec.Command(editor, tmpFile.Name())
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Run()
if cmd.ProcessState.Success() {
again:
fmt.Printf("\nSave message? ([(y)es], (r)enamed, (d)raft, (n)o): ")
reader := bufio.NewReader(os.Stdin)
response, err := reader.ReadString('\n')
if err != nil {
fmt.Printf("Error when reading response: %s\n", err.Error())
os.Exit(1)
}
var dst string
saved := false
response = strings.TrimSpace(response)
switch response {
case "y", "yes", "":
dst = filepath.Join(todoDir, filepath.Base(tmpFile.Name())+".msg")
dst, err = copyFile(tmpFile.Name(), dst, false)
saved = true
case "r", "renamed":
fmt.Printf("\nSpecify new name (leave empty to return to previous menu): ")
reader := bufio.NewReader(os.Stdin)
response, err := reader.ReadString('\n')
if strings.TrimSpace(response) == "" {
goto again
}
if err != nil {
fmt.Printf("Error when reading response: %s\n", err.Error())
os.Exit(1)
}
dst = filepath.Join(todoDir, strings.TrimSpace(response)+".msg")
dst, err = copyFile(tmpFile.Name(), dst, false)
saved = true
case "d", "draft":
dst = filepath.Join(draftsDir, filepath.Base(tmpFile.Name())+".msg")
dst, err = copyFile(tmpFile.Name(), dst, false)
saved = true
}
if err != nil {
fmt.Printf("Error when saving %s: %s\n", dst, err)
} else if saved {
fmt.Printf("Saved as: %s\n", dst)
} else {
fmt.Println("Discarding message.")
}
}
}
// Copy file from `src` to `dst`. If `overwrite` is false, then an alternative
// file name will be used and returned as string.
// TODO: Portability issues (cp) / https://github.com/golang/go/issues/8868
func copyFile(src, dst string, overwrite bool) (string, error) {
if !overwrite {
var err error
dst, err = nextFreeFilename(dst)
if err != nil {
return "", err
}
}
err := exec.Command("cp", "-f", src, dst).Run()
return dst, err
}
func nextFreeFilename(dst string) (string, error) {
_, e := os.Stat(dst)
// If the file does not exist, we can use the name
if os.IsNotExist(e) {
return dst, nil
}
alt := ""
for i := 0; i < 255; i++ {
name := fmt.Sprintf("%s.%d", dst, i)
_, e := os.Stat(name)
if os.IsNotExist(e) {
alt = name
break
}
}
if alt == "" {
return "", fmt.Errorf("No suitable file name could be found.")
}
return alt, nil
}
func editor() string {
editor := os.Getenv("VISUAL")
if editor != "" {
return editor
}
editor = os.Getenv("EDITOR")
if editor != "" {
return editor
}
return "vi"
}
|
