aboutsummaryrefslogtreecommitdiff
path: root/config/config.go
blob: 738fd1d893a2c1c25615b032a844f75939bc6dcf (plain)
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
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
package config

import (
	"errors"
	"fmt"
	"io/ioutil"
	"net/url"
	"os"
	"os/exec"
	"path"
	"regexp"
	"sort"
	"strings"
	"unicode"

	"github.com/gdamore/tcell"
	"github.com/go-ini/ini"
	"github.com/kyoh86/xdg"
)

type GeneralConfig struct {
	DefaultSavePath string `ini:"default-save-path"`
}

type UIConfig struct {
	IndexFormat       string   `ini:"index-format"`
	TimestampFormat   string   `ini:"timestamp-format"`
	ShowHeaders       []string `delim:","`
	RenderAccountTabs string   `ini:"render-account-tabs"`
	SidebarWidth      int      `ini:"sidebar-width"`
	PreviewHeight     int      `ini:"preview-height"`
	EmptyMessage      string   `ini:"empty-message"`
	EmptyDirlist      string   `ini:"empty-dirlist"`
	MouseEnabled      bool     `ini:"mouse-enabled"`
	NewMessageBell    bool     `ini:"new-message-bell"`
	Spinner           string   `ini:"spinner"`
	SpinnerDelimiter  string   `ini:"spinner-delimiter"`
	DirListFormat     string   `ini:"dirlist-format"`
}

const (
	FILTER_MIMETYPE = iota
	FILTER_HEADER
)

type AccountConfig struct {
	Archive         string
	CopyTo          string
	Default         string
	From            string
	Name            string
	Source          string
	SourceCredCmd   string
	Folders         []string
	Params          map[string]string
	Outgoing        string
	OutgoingCredCmd string
}

type BindingConfig struct {
	Global        *KeyBindings
	AccountWizard *KeyBindings
	Compose       *KeyBindings
	ComposeEditor *KeyBindings
	ComposeReview *KeyBindings
	MessageList   *KeyBindings
	MessageView   *KeyBindings
	Terminal      *KeyBindings
}

type ComposeConfig struct {
	Editor       string     `ini:"editor"`
	HeaderLayout [][]string `ini:"-"`
}

type FilterConfig struct {
	FilterType int
	Filter     string
	Command    string
	Header     string
	Regex      *regexp.Regexp
}

type ViewerConfig struct {
	Pager          string
	Alternatives   []string
	ShowHeaders    bool       `ini:"show-headers"`
	AlwaysShowMime bool       `ini:"always-show-mime"`
	HeaderLayout   [][]string `ini:"-"`
}

type TriggersConfig struct {
	NewEmail       string `ini:"new-email"`
	ExecuteCommand func(command []string) error
}

type AercConfig struct {
	Bindings BindingConfig
	Compose  ComposeConfig
	Ini      *ini.File       `ini:"-"`
	Accounts []AccountConfig `ini:"-"`
	Filters  []FilterConfig  `ini:"-"`
	Viewer   ViewerConfig    `ini:"-"`
	Triggers TriggersConfig  `ini:"-"`
	Ui       UIConfig
	General  GeneralConfig
}

// Input: TimestampFormat
// Output: timestamp-format
func mapName(raw string) string {
	newstr := make([]rune, 0, len(raw))
	for i, chr := range raw {
		if isUpper := 'A' <= chr && chr <= 'Z'; isUpper {
			if i > 0 {
				newstr = append(newstr, '-')
			}
		}
		newstr = append(newstr, unicode.ToLower(chr))
	}
	return string(newstr)
}

func loadAccountConfig(path string) ([]AccountConfig, error) {
	file, err := ini.Load(path)
	if err != nil {
		// No config triggers account configuration wizard
		return nil, nil
	}
	file.NameMapper = mapName

	var accounts []AccountConfig
	for _, _sec := range file.SectionStrings() {
		if _sec == "DEFAULT" {
			continue
		}
		sec := file.Section(_sec)
		account := AccountConfig{
			Archive: "Archive",
			Default: "INBOX",
			Name:    _sec,
			Params:  make(map[string]string),
		}
		if err = sec.MapTo(&account); err != nil {
			return nil, err
		}
		for key, val := range sec.KeysHash() {
			if key == "folders" {
				folders := strings.Split(val, ",")
				sort.Strings(folders)
				account.Folders = folders
			} else if key == "source-cred-cmd" {
				account.SourceCredCmd = val
			} else if key == "outgoing" {
				account.Outgoing = val
			} else if key == "outgoing-cred-cmd" {
				account.OutgoingCredCmd = val
			} else if key == "from" {
				account.From = val
			} else if key == "copy-to" {
				account.CopyTo = val
			} else if key == "archive" {
				account.Archive = val
			} else if key != "name" {
				account.Params[key] = val
			}
		}
		if account.Source == "" {
			return nil, fmt.Errorf("Expected source for account %s", _sec)
		}

		source, err := parseCredential(account.Source, account.SourceCredCmd)
		if err != nil {
			return nil, fmt.Errorf("Invalid source credentials for %s: %s", _sec, err)
		}
		account.Source = source

		outgoing, err := parseCredential(account.Outgoing, account.OutgoingCredCmd)
		if err != nil {
			return nil, fmt.Errorf("Invalid outgoing credentials for %s: %s", _sec, err)
		}
		account.Outgoing = outgoing

		accounts = append(accounts, account)
	}
	return accounts, nil
}

func parseCredential(cred, command string) (string, error) {
	if cred == "" || command == "" {
		return cred, nil
	}

	u, err := url.Parse(cred)
	if err != nil {
		return "", err
	}

	// ignore the command if a password is specified
	if _, exists := u.User.Password(); exists {
		return cred, nil
	}

	// don't attempt to parse the command if the url is a path (ie /usr/bin/sendmail)
	if !u.IsAbs() {
		return cred, nil
	}

	cmd := exec.Command("sh", "-c", command)
	cmd.Stdin = os.Stdin
	output, err := cmd.Output()
	if err != nil {
		return "", fmt.Errorf("failed to read password: %s", err)
	}

	pw := strings.TrimSpace(string(output))
	u.User = url.UserPassword(u.User.Username(), pw)

	return u.String(), nil
}

func installTemplate(root, sharedir, name string) error {
	if _, err := os.Stat(root); os.IsNotExist(err) {
		err := os.MkdirAll(root, 0755)
		if err != nil {
			return err
		}
	}
	data, err := ioutil.ReadFile(path.Join(sharedir, name))
	if err != nil {
		return err
	}
	err = ioutil.WriteFile(path.Join(root, name), data, 0644)
	if err != nil {
		return err
	}
	return nil
}

func (config *AercConfig) LoadConfig(file *ini.File) error {
	if filters, err := file.GetSection("filters"); err == nil {
		// TODO: Parse the filter more finely, e.g. parse the regex
		for _, match := range filters.KeyStrings() {
			cmd := filters.KeysHash()[match]
			filter := FilterConfig{
				Command: cmd,
				Filter:  match,
			}
			if strings.Contains(match, ",~") {
				filter.FilterType = FILTER_HEADER
				header := filter.Filter[:strings.Index(filter.Filter, ",")]
				regex := filter.Filter[strings.Index(filter.Filter, "~")+1:]
				filter.Header = strings.ToLower(header)
				filter.Regex, err = regexp.Compile(regex)
				if err != nil {
					panic(err)
				}
			} else if strings.ContainsRune(match, ',') {
				filter.FilterType = FILTER_HEADER
				header := filter.Filter[:strings.Index(filter.Filter, ",")]
				value := filter.Filter[strings.Index(filter.Filter, ",")+1:]
				filter.Header = strings.ToLower(header)
				filter.Regex, err = regexp.Compile(regexp.QuoteMeta(value))
			} else {
				filter.FilterType = FILTER_MIMETYPE
			}
			config.Filters = append(config.Filters, filter)
		}
	}
	if viewer, err := file.GetSection("viewer"); err == nil {
		if err := viewer.MapTo(&config.Viewer); err != nil {
			return err
		}
		for key, val := range viewer.KeysHash() {
			switch key {
			case "alternatives":
				config.Viewer.Alternatives = strings.Split(val, ",")
			case "header-layout":
				config.Viewer.HeaderLayout = parseLayout(val)
			}
		}
	}
	if compose, err := file.GetSection("compose"); err == nil {
		if err := compose.MapTo(&config.Compose); err != nil {
			return err
		}
		for key, val := range compose.KeysHash() {
			switch key {
			case "header-layout":
				config.Compose.HeaderLayout = parseLayout(val)
			}
		}
	}
	if ui, err := file.GetSection("ui"); err == nil {
		if err := ui.MapTo(&config.Ui); err != nil {
			return err
		}
	}
	if triggers, err := file.GetSection("triggers"); err == nil {
		if err := triggers.MapTo(&config.Triggers); err != nil {
			return err
		}
	}
	return nil
}

func LoadConfigFromFile(root *string, sharedir string) (*AercConfig, error) {
	if root == nil {
		_root := path.Join(xdg.ConfigHome(), "aerc")
		root = &_root
	}
	filename := path.Join(*root, "accounts.conf")
	if err := checkConfigPerms(filename); err != nil {
		return nil, err
	}
	filename = path.Join(*root, "aerc.conf")
	file, err := ini.Load(filename)
	if err != nil {
		if err := installTemplate(*root, sharedir, "aerc.conf"); err != nil {
			return nil, err
		}
		if file, err = ini.Load(filename); err != nil {
			return nil, err
		}
	}
	file.NameMapper = mapName
	config := &AercConfig{
		Bindings: BindingConfig{
			Global:        NewKeyBindings(),
			AccountWizard: NewKeyBindings(),
			Compose:       NewKeyBindings(),
			ComposeEditor: NewKeyBindings(),
			ComposeReview: NewKeyBindings(),
			MessageList:   NewKeyBindings(),
			MessageView:   NewKeyBindings(),
			Terminal:      NewKeyBindings(),
		},
		Ini: file,

		Ui: UIConfig{
			IndexFormat:     "%D %-17.17n %s",
			TimestampFormat: "2006-01-02 03:04 PM",
			ShowHeaders: []string{
				"From", "To", "Cc", "Bcc", "Subject", "Date",
			},
			RenderAccountTabs: "auto",
			SidebarWidth:      20,
			PreviewHeight:     12,
			EmptyMessage:      "(no messages)",
			EmptyDirlist:      "(no folders)",
			MouseEnabled:      false,
			NewMessageBell:    true,
			Spinner:           "[..]    , [..]   ,  [..]  ,   [..] ,    [..],   [..] ,  [..]  , [..]   ",
			SpinnerDelimiter:  ",",
			DirListFormat:     "%n %>r",
		},

		Viewer: ViewerConfig{
			Pager:        "less -R",
			Alternatives: []string{"text/plain", "text/html"},
			ShowHeaders:  false,
			HeaderLayout: [][]string{
				{"From", "To"},
				{"Cc", "Bcc"},
				{"Date"},
				{"Subject"},
			},
		},

		Compose: ComposeConfig{
			HeaderLayout: [][]string{
				{"To", "From"},
				{"Subject"},
			},
		},
	}
	// These bindings are not configurable
	config.Bindings.AccountWizard.ExKey = KeyStroke{
		Key: tcell.KeyCtrlE,
	}
	quit, _ := ParseBinding("<C-q>", ":quit<Enter>")
	config.Bindings.AccountWizard.Add(quit)

	if err = config.LoadConfig(file); err != nil {
		return nil, err
	}
	if ui, err := file.GetSection("general"); err == nil {
		if err := ui.MapTo(&config.General); err != nil {
			return nil, err
		}
	}

	accountsPath := path.Join(*root, "accounts.conf")
	if accounts, err := loadAccountConfig(accountsPath); err != nil {
		return nil, err
	} else {
		config.Accounts = accounts
	}
	filename = path.Join(*root, "binds.conf")
	binds, err := ini.Load(filename)
	if err != nil {
		if err := installTemplate(*root, sharedir, "binds.conf"); err != nil {
			return nil, err
		}
		if binds, err = ini.Load(filename); err != nil {
			return nil, err
		}
	}
	groups := map[string]**KeyBindings{
		"default":  &config.Bindings.Global,
		"compose":  &config.Bindings.Compose,
		"messages": &config.Bindings.MessageList,
		"terminal": &config.Bindings.Terminal,
		"view":     &config.Bindings.MessageView,

		"compose::editor": &config.Bindings.ComposeEditor,
		"compose::review": &config.Bindings.ComposeReview,
	}
	for _, name := range binds.SectionStrings() {
		sec, err := binds.GetSection(name)
		if err != nil {
			return nil, err
		}
		group, ok := groups[strings.ToLower(name)]
		if !ok {
			return nil, errors.New("Unknown keybinding group " + name)
		}
		bindings := NewKeyBindings()
		for key, value := range sec.KeysHash() {
			if key == "$ex" {
				strokes, err := ParseKeyStrokes(value)
				if err != nil {
					return nil, err
				}
				if len(strokes) != 1 {
					return nil, errors.New(
						"Error: only one keystroke supported for $ex")
				}
				bindings.ExKey = strokes[0]
				continue
			}
			if key == "$noinherit" {
				if value == "false" {
					continue
				}
				if value != "true" {
					return nil, errors.New(
						"Error: expected 'true' or 'false' for $noinherit")
				}
				bindings.Globals = false
				continue
			}
			binding, err := ParseBinding(key, value)
			if err != nil {
				return nil, err
			}
			bindings.Add(binding)
		}
		*group = MergeBindings(bindings, *group)
	}
	// Globals can't inherit from themselves
	config.Bindings.Global.Globals = false
	return config, nil
}

// checkConfigPerms checks for too open permissions
// printing the fix on stdout and returning an error
func checkConfigPerms(filename string) error {
	info, err := os.Stat(filename)
	if err != nil {
		return nil // disregard absent files
	}
	perms := info.Mode().Perm()
	goPerms := perms >> 3
	// group or others have read access
	if goPerms&0x44 != 0 {
		fmt.Fprintf(os.Stderr, "The file %v has too open permissions.\n", filename)
		fmt.Fprintln(os.Stderr, "This is a security issue (it contains passwords).")
		fmt.Fprintf(os.Stderr, "To fix it, run `chmod 600 %v`\n", filename)
		return errors.New("account.conf permissions too lax")
	}
	return nil
}

func parseLayout(layout string) [][]string {
	rows := strings.Split(layout, ",")
	l := make([][]string, len(rows))
	for i, r := range rows {
		l[i] = strings.Split(r, "|")
	}
	return l
}