forked from syncthing/syncthing
-
Notifications
You must be signed in to change notification settings - Fork 0
/
config.go
716 lines (606 loc) · 21.1 KB
/
config.go
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
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
// Copyright (C) 2014 The Syncthing Authors.
//
// 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 config implements reading and writing of the syncthing configuration file.
package config
import (
"encoding/xml"
"fmt"
"io"
"math/rand"
"os"
"path/filepath"
"reflect"
"sort"
"strconv"
"strings"
"github.com/calmh/logger"
"github.com/syncthing/protocol"
"github.com/syncthing/syncthing/internal/osutil"
"golang.org/x/crypto/bcrypt"
)
var l = logger.DefaultLogger
const CurrentVersion = 8
type Configuration struct {
Version int `xml:"version,attr"`
Folders []FolderConfiguration `xml:"folder"`
Devices []DeviceConfiguration `xml:"device"`
GUI GUIConfiguration `xml:"gui"`
Options OptionsConfiguration `xml:"options"`
IgnoredDevices []protocol.DeviceID `xml:"ignoredDevice"`
XMLName xml.Name `xml:"configuration" json:"-"`
OriginalVersion int `xml:"-" json:"-"` // The version we read from disk, before any conversion
Deprecated_Repositories []FolderConfiguration `xml:"repository" json:"-"`
Deprecated_Nodes []DeviceConfiguration `xml:"node" json:"-"`
}
type FolderConfiguration struct {
ID string `xml:"id,attr"`
Path string `xml:"path,attr"`
Devices []FolderDeviceConfiguration `xml:"device"`
ReadOnly bool `xml:"ro,attr"`
RescanIntervalS int `xml:"rescanIntervalS,attr" default:"60"`
IgnorePerms bool `xml:"ignorePerms,attr"`
Versioning VersioningConfiguration `xml:"versioning"`
LenientMtimes bool `xml:"lenientMtimes"`
Copiers int `xml:"copiers" default:"1"` // This defines how many files are handled concurrently.
Pullers int `xml:"pullers" default:"16"` // Defines how many blocks are fetched at the same time, possibly between separate copier routines.
Hashers int `xml:"hashers" default:"0"` // Less than one sets the value to the number of cores. These are CPU bound due to hashing.
Invalid string `xml:"-"` // Set at runtime when there is an error, not saved
deviceIDs []protocol.DeviceID
Deprecated_Directory string `xml:"directory,omitempty,attr" json:"-"`
Deprecated_Nodes []FolderDeviceConfiguration `xml:"node" json:"-"`
}
func (f *FolderConfiguration) CreateMarker() error {
if !f.HasMarker() {
marker := filepath.Join(f.Path, ".stfolder")
fd, err := os.Create(marker)
if err != nil {
return err
}
fd.Close()
osutil.HideFile(marker)
}
return nil
}
func (f *FolderConfiguration) HasMarker() bool {
_, err := os.Stat(filepath.Join(f.Path, ".stfolder"))
if err != nil {
return false
}
return true
}
func (f *FolderConfiguration) DeviceIDs() []protocol.DeviceID {
if f.deviceIDs == nil {
for _, n := range f.Devices {
f.deviceIDs = append(f.deviceIDs, n.DeviceID)
}
}
return f.deviceIDs
}
type VersioningConfiguration struct {
Type string `xml:"type,attr"`
Params map[string]string
}
type InternalVersioningConfiguration struct {
Type string `xml:"type,attr,omitempty"`
Params []InternalParam `xml:"param"`
}
type InternalParam struct {
Key string `xml:"key,attr"`
Val string `xml:"val,attr"`
}
func (c *VersioningConfiguration) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
var tmp InternalVersioningConfiguration
tmp.Type = c.Type
for k, v := range c.Params {
tmp.Params = append(tmp.Params, InternalParam{k, v})
}
return e.EncodeElement(tmp, start)
}
func (c *VersioningConfiguration) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
var tmp InternalVersioningConfiguration
err := d.DecodeElement(&tmp, &start)
if err != nil {
return err
}
c.Type = tmp.Type
c.Params = make(map[string]string, len(tmp.Params))
for _, p := range tmp.Params {
c.Params[p.Key] = p.Val
}
return nil
}
type DeviceConfiguration struct {
DeviceID protocol.DeviceID `xml:"id,attr"`
Name string `xml:"name,attr,omitempty"`
Addresses []string `xml:"address,omitempty"`
Compression bool `xml:"compression,attr"`
CertName string `xml:"certName,attr,omitempty"`
Introducer bool `xml:"introducer,attr"`
}
type FolderDeviceConfiguration struct {
DeviceID protocol.DeviceID `xml:"id,attr"`
Deprecated_Name string `xml:"name,attr,omitempty" json:"-"`
Deprecated_Addresses []string `xml:"address,omitempty" json:"-"`
}
type OptionsConfiguration struct {
ListenAddress []string `xml:"listenAddress" default:"0.0.0.0:22000"`
GlobalAnnServers []string `xml:"globalAnnounceServer" default:"udp4://announce.syncthing.net:22026, udp6://announce-v6.syncthing.net:22026"`
GlobalAnnEnabled bool `xml:"globalAnnounceEnabled" default:"true"`
LocalAnnEnabled bool `xml:"localAnnounceEnabled" default:"true"`
LocalAnnPort int `xml:"localAnnouncePort" default:"21025"`
LocalAnnMCAddr string `xml:"localAnnounceMCAddr" default:"[ff32::5222]:21026"`
MaxSendKbps int `xml:"maxSendKbps"`
MaxRecvKbps int `xml:"maxRecvKbps"`
ReconnectIntervalS int `xml:"reconnectionIntervalS" default:"60"`
StartBrowser bool `xml:"startBrowser" default:"true"`
UPnPEnabled bool `xml:"upnpEnabled" default:"true"`
UPnPLease int `xml:"upnpLeaseMinutes" default:"0"`
UPnPRenewal int `xml:"upnpRenewalMinutes" default:"30"`
URAccepted int `xml:"urAccepted"` // Accepted usage reporting version; 0 for off (undecided), -1 for off (permanently)
URUniqueID string `xml:"urUniqueID"` // Unique ID for reporting purposes, regenerated when UR is turned on.
RestartOnWakeup bool `xml:"restartOnWakeup" default:"true"`
AutoUpgradeIntervalH int `xml:"autoUpgradeIntervalH" default:"12"` // 0 for off
KeepTemporariesH int `xml:"keepTemporariesH" default:"24"` // 0 for off
CacheIgnoredFiles bool `xml:"cacheIgnoredFiles" default:"true"`
ProgressUpdateIntervalS int `xml:"progressUpdateIntervalS" default:"5"`
SymlinksEnabled bool `xml:"symlinksEnabled" default:"true"`
Deprecated_RescanIntervalS int `xml:"rescanIntervalS,omitempty" json:"-"`
Deprecated_UREnabled bool `xml:"urEnabled,omitempty" json:"-"`
Deprecated_URDeclined bool `xml:"urDeclined,omitempty" json:"-"`
Deprecated_ReadOnly bool `xml:"readOnly,omitempty" json:"-"`
Deprecated_GUIEnabled bool `xml:"guiEnabled,omitempty" json:"-"`
Deprecated_GUIAddress string `xml:"guiAddress,omitempty" json:"-"`
}
type GUIConfiguration struct {
Enabled bool `xml:"enabled,attr" default:"true"`
Address string `xml:"address" default:"127.0.0.1:8080"`
User string `xml:"user,omitempty"`
Password string `xml:"password,omitempty"`
UseTLS bool `xml:"tls,attr"`
APIKey string `xml:"apikey,omitempty"`
}
func New(myID protocol.DeviceID) Configuration {
var cfg Configuration
cfg.Version = CurrentVersion
cfg.OriginalVersion = CurrentVersion
setDefaults(&cfg)
setDefaults(&cfg.Options)
setDefaults(&cfg.GUI)
cfg.prepare(myID)
return cfg
}
func ReadXML(r io.Reader, myID protocol.DeviceID) (Configuration, error) {
var cfg Configuration
setDefaults(&cfg)
setDefaults(&cfg.Options)
setDefaults(&cfg.GUI)
err := xml.NewDecoder(r).Decode(&cfg)
cfg.OriginalVersion = cfg.Version
cfg.prepare(myID)
return cfg, err
}
func (cfg *Configuration) WriteXML(w io.Writer) error {
e := xml.NewEncoder(w)
e.Indent("", " ")
err := e.Encode(cfg)
if err != nil {
return err
}
_, err = w.Write([]byte("\n"))
return err
}
func (cfg *Configuration) prepare(myID protocol.DeviceID) {
fillNilSlices(&cfg.Options)
// Initialize an empty slices
if cfg.Folders == nil {
cfg.Folders = []FolderConfiguration{}
}
if cfg.IgnoredDevices == nil {
cfg.IgnoredDevices = []protocol.DeviceID{}
}
// Check for missing, bad or duplicate folder ID:s
var seenFolders = map[string]*FolderConfiguration{}
var uniqueCounter int
for i := range cfg.Folders {
folder := &cfg.Folders[i]
if len(folder.Path) == 0 {
folder.Invalid = "no directory configured"
continue
}
// The reason it's done like this:
// C: -> C:\ -> C:\ (issue that this is trying to fix)
// C:\somedir -> C:\somedir\ -> C:\somedir
// C:\somedir\ -> C:\somedir\\ -> C:\somedir
// This way in the tests, we get away without OS specific separators
// in the test configs.
folder.Path = filepath.Dir(folder.Path + string(filepath.Separator))
if folder.ID == "" {
folder.ID = "default"
}
if seen, ok := seenFolders[folder.ID]; ok {
l.Warnf("Multiple folders with ID %q; disabling", folder.ID)
seen.Invalid = "duplicate folder ID"
if seen.ID == folder.ID {
uniqueCounter++
seen.ID = fmt.Sprintf("%s~%d", folder.ID, uniqueCounter)
}
folder.Invalid = "duplicate folder ID"
uniqueCounter++
folder.ID = fmt.Sprintf("%s~%d", folder.ID, uniqueCounter)
} else {
seenFolders[folder.ID] = folder
}
}
if cfg.Options.Deprecated_URDeclined {
cfg.Options.URAccepted = -1
cfg.Options.URUniqueID = ""
}
cfg.Options.Deprecated_URDeclined = false
cfg.Options.Deprecated_UREnabled = false
// Upgrade configuration versions as appropriate
if cfg.Version == 1 {
convertV1V2(cfg)
}
if cfg.Version == 2 {
convertV2V3(cfg)
}
if cfg.Version == 3 {
convertV3V4(cfg)
}
if cfg.Version == 4 {
convertV4V5(cfg)
}
if cfg.Version == 5 {
convertV5V6(cfg)
}
if cfg.Version == 6 {
convertV6V7(cfg)
}
if cfg.Version == 7 {
convertV7V8(cfg)
}
// Hash old cleartext passwords
if len(cfg.GUI.Password) > 0 && cfg.GUI.Password[0] != '$' {
hash, err := bcrypt.GenerateFromPassword([]byte(cfg.GUI.Password), 0)
if err != nil {
l.Warnln("bcrypting password:", err)
} else {
cfg.GUI.Password = string(hash)
}
}
// Build a list of available devices
existingDevices := make(map[protocol.DeviceID]bool)
for _, device := range cfg.Devices {
existingDevices[device.DeviceID] = true
}
// Ensure this device is present in the config
if !existingDevices[myID] {
myName, _ := os.Hostname()
cfg.Devices = append(cfg.Devices, DeviceConfiguration{
DeviceID: myID,
Name: myName,
})
existingDevices[myID] = true
}
sort.Sort(DeviceConfigurationList(cfg.Devices))
// Ensure that any loose devices are not present in the wrong places
// Ensure that there are no duplicate devices
// Ensure that puller settings are sane
for i := range cfg.Folders {
cfg.Folders[i].Devices = ensureDevicePresent(cfg.Folders[i].Devices, myID)
cfg.Folders[i].Devices = ensureExistingDevices(cfg.Folders[i].Devices, existingDevices)
cfg.Folders[i].Devices = ensureNoDuplicates(cfg.Folders[i].Devices)
if cfg.Folders[i].Copiers == 0 {
cfg.Folders[i].Copiers = 1
}
if cfg.Folders[i].Pullers == 0 {
cfg.Folders[i].Pullers = 16
}
sort.Sort(FolderDeviceConfigurationList(cfg.Folders[i].Devices))
}
// An empty address list is equivalent to a single "dynamic" entry
for i := range cfg.Devices {
n := &cfg.Devices[i]
if len(n.Addresses) == 0 || len(n.Addresses) == 1 && n.Addresses[0] == "" {
n.Addresses = []string{"dynamic"}
}
}
cfg.Options.ListenAddress = uniqueStrings(cfg.Options.ListenAddress)
cfg.Options.GlobalAnnServers = uniqueStrings(cfg.Options.GlobalAnnServers)
if cfg.GUI.APIKey == "" {
cfg.GUI.APIKey = randomString(32)
}
}
// ChangeRequiresRestart returns true if updating the configuration requires a
// complete restart.
func ChangeRequiresRestart(from, to Configuration) bool {
// Adding, removing or changing folders requires restart
if !reflect.DeepEqual(from.Folders, to.Folders) {
return true
}
// Removing a device requres restart
toDevs := make(map[protocol.DeviceID]bool, len(from.Devices))
for _, dev := range to.Devices {
toDevs[dev.DeviceID] = true
}
for _, dev := range from.Devices {
if _, ok := toDevs[dev.DeviceID]; !ok {
return true
}
}
// Changing usage reporting to on or off does not require a restart.
to.Options.URAccepted = from.Options.URAccepted
to.Options.URUniqueID = from.Options.URUniqueID
// All of the generic options require restart
if !reflect.DeepEqual(from.Options, to.Options) || !reflect.DeepEqual(from.GUI, to.GUI) {
return true
}
return false
}
func convertV7V8(cfg *Configuration) {
// Add IPv6 announce server
if len(cfg.Options.GlobalAnnServers) == 1 && cfg.Options.GlobalAnnServers[0] == "udp4://announce.syncthing.net:22026" {
cfg.Options.GlobalAnnServers = append(cfg.Options.GlobalAnnServers, "udp6://announce-v6.syncthing.net:22026")
}
cfg.Version = 8
}
func convertV6V7(cfg *Configuration) {
// Migrate announce server addresses to the new URL based format
for i := range cfg.Options.GlobalAnnServers {
cfg.Options.GlobalAnnServers[i] = "udp4://" + cfg.Options.GlobalAnnServers[i]
}
cfg.Version = 7
}
func convertV5V6(cfg *Configuration) {
// Added ".stfolder" file at folder roots to identify mount issues
// Doesn't affect the config itself, but uses config migrations to identify
// the migration point.
for _, folder := range Wrap("", *cfg).Folders() {
// Best attempt, if it fails, it fails, the user will have to fix
// it up manually, as the repo will not get started.
folder.CreateMarker()
}
cfg.Version = 6
}
func convertV4V5(cfg *Configuration) {
// Renamed a bunch of fields in the structs.
if cfg.Deprecated_Nodes == nil {
cfg.Deprecated_Nodes = []DeviceConfiguration{}
}
if cfg.Deprecated_Repositories == nil {
cfg.Deprecated_Repositories = []FolderConfiguration{}
}
cfg.Devices = cfg.Deprecated_Nodes
cfg.Folders = cfg.Deprecated_Repositories
for i := range cfg.Folders {
cfg.Folders[i].Path = cfg.Folders[i].Deprecated_Directory
cfg.Folders[i].Deprecated_Directory = ""
cfg.Folders[i].Devices = cfg.Folders[i].Deprecated_Nodes
cfg.Folders[i].Deprecated_Nodes = nil
}
cfg.Deprecated_Nodes = nil
cfg.Deprecated_Repositories = nil
cfg.Version = 5
}
func convertV3V4(cfg *Configuration) {
// In previous versions, rescan interval was common for each folder.
// From now, it can be set independently. We have to make sure, that after upgrade
// the individual rescan interval will be defined for every existing folder.
for i := range cfg.Deprecated_Repositories {
cfg.Deprecated_Repositories[i].RescanIntervalS = cfg.Options.Deprecated_RescanIntervalS
}
cfg.Options.Deprecated_RescanIntervalS = 0
// In previous versions, folders held full device configurations.
// Since that's the only place where device configs were in V1, we still have
// to define the deprecated fields to be able to upgrade from V1 to V4.
for i, folder := range cfg.Deprecated_Repositories {
for j := range folder.Deprecated_Nodes {
rncfg := cfg.Deprecated_Repositories[i].Deprecated_Nodes[j]
rncfg.Deprecated_Name = ""
rncfg.Deprecated_Addresses = nil
}
}
cfg.Version = 4
}
func convertV2V3(cfg *Configuration) {
// In previous versions, compression was always on. When upgrading, enable
// compression on all existing new. New devices will get compression on by
// default by the GUI.
for i := range cfg.Deprecated_Nodes {
cfg.Deprecated_Nodes[i].Compression = true
}
// The global discovery format and port number changed in v0.9. Having the
// default announce server but old port number is guaranteed to be legacy.
if len(cfg.Options.GlobalAnnServers) == 1 && cfg.Options.GlobalAnnServers[0] == "announce.syncthing.net:22025" {
cfg.Options.GlobalAnnServers = []string{"announce.syncthing.net:22026"}
}
cfg.Version = 3
}
func convertV1V2(cfg *Configuration) {
// Collect the list of devices.
// Replace device configs inside folders with only a reference to the
// device ID. Set all folders to read only if the global read only flag is
// set.
var devices = map[string]FolderDeviceConfiguration{}
for i, folder := range cfg.Deprecated_Repositories {
cfg.Deprecated_Repositories[i].ReadOnly = cfg.Options.Deprecated_ReadOnly
for j, device := range folder.Deprecated_Nodes {
id := device.DeviceID.String()
if _, ok := devices[id]; !ok {
devices[id] = device
}
cfg.Deprecated_Repositories[i].Deprecated_Nodes[j] = FolderDeviceConfiguration{DeviceID: device.DeviceID}
}
}
cfg.Options.Deprecated_ReadOnly = false
// Set and sort the list of devices.
for _, device := range devices {
cfg.Deprecated_Nodes = append(cfg.Deprecated_Nodes, DeviceConfiguration{
DeviceID: device.DeviceID,
Name: device.Deprecated_Name,
Addresses: device.Deprecated_Addresses,
})
}
sort.Sort(DeviceConfigurationList(cfg.Deprecated_Nodes))
// GUI
cfg.GUI.Address = cfg.Options.Deprecated_GUIAddress
cfg.GUI.Enabled = cfg.Options.Deprecated_GUIEnabled
cfg.Options.Deprecated_GUIEnabled = false
cfg.Options.Deprecated_GUIAddress = ""
cfg.Version = 2
}
func setDefaults(data interface{}) error {
s := reflect.ValueOf(data).Elem()
t := s.Type()
for i := 0; i < s.NumField(); i++ {
f := s.Field(i)
tag := t.Field(i).Tag
v := tag.Get("default")
if len(v) > 0 {
switch f.Interface().(type) {
case string:
f.SetString(v)
case int:
i, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return err
}
f.SetInt(i)
case bool:
f.SetBool(v == "true")
case []string:
// We don't do anything with string slices here. Any default
// we set will be appended to by the XML decoder, so we fill
// those after decoding.
default:
panic(f.Type())
}
}
}
return nil
}
// fillNilSlices sets default value on slices that are still nil.
func fillNilSlices(data interface{}) error {
s := reflect.ValueOf(data).Elem()
t := s.Type()
for i := 0; i < s.NumField(); i++ {
f := s.Field(i)
tag := t.Field(i).Tag
v := tag.Get("default")
if len(v) > 0 {
switch f.Interface().(type) {
case []string:
if f.IsNil() {
// Treat the default as a comma separated slice
vs := strings.Split(v, ",")
for i := range vs {
vs[i] = strings.TrimSpace(vs[i])
}
rv := reflect.MakeSlice(reflect.TypeOf([]string{}), len(vs), len(vs))
for i, v := range vs {
rv.Index(i).SetString(v)
}
f.Set(rv)
}
}
}
}
return nil
}
func uniqueStrings(ss []string) []string {
var m = make(map[string]bool, len(ss))
for _, s := range ss {
m[s] = true
}
var us = make([]string, 0, len(m))
for k := range m {
us = append(us, k)
}
sort.Strings(us)
return us
}
func ensureDevicePresent(devices []FolderDeviceConfiguration, myID protocol.DeviceID) []FolderDeviceConfiguration {
for _, device := range devices {
if device.DeviceID.Equals(myID) {
return devices
}
}
devices = append(devices, FolderDeviceConfiguration{
DeviceID: myID,
})
return devices
}
func ensureExistingDevices(devices []FolderDeviceConfiguration, existingDevices map[protocol.DeviceID]bool) []FolderDeviceConfiguration {
count := len(devices)
i := 0
loop:
for i < count {
if _, ok := existingDevices[devices[i].DeviceID]; !ok {
devices[i] = devices[count-1]
count--
continue loop
}
i++
}
return devices[0:count]
}
func ensureNoDuplicates(devices []FolderDeviceConfiguration) []FolderDeviceConfiguration {
count := len(devices)
i := 0
seenDevices := make(map[protocol.DeviceID]bool)
loop:
for i < count {
id := devices[i].DeviceID
if _, ok := seenDevices[id]; ok {
devices[i] = devices[count-1]
count--
continue loop
}
seenDevices[id] = true
i++
}
return devices[0:count]
}
type DeviceConfigurationList []DeviceConfiguration
func (l DeviceConfigurationList) Less(a, b int) bool {
return l[a].DeviceID.Compare(l[b].DeviceID) == -1
}
func (l DeviceConfigurationList) Swap(a, b int) {
l[a], l[b] = l[b], l[a]
}
func (l DeviceConfigurationList) Len() int {
return len(l)
}
type FolderDeviceConfigurationList []FolderDeviceConfiguration
func (l FolderDeviceConfigurationList) Less(a, b int) bool {
return l[a].DeviceID.Compare(l[b].DeviceID) == -1
}
func (l FolderDeviceConfigurationList) Swap(a, b int) {
l[a], l[b] = l[b], l[a]
}
func (l FolderDeviceConfigurationList) Len() int {
return len(l)
}
// randomCharset contains the characters that can make up a randomString().
const randomCharset = "01234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-"
// randomString returns a string of random characters (taken from
// randomCharset) of the specified length.
func randomString(l int) string {
bs := make([]byte, l)
for i := range bs {
bs[i] = randomCharset[rand.Intn(len(randomCharset))]
}
return string(bs)
}