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Commit173554d

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committed
chore: conditionally start file sync daemon
1 parent2603ace commit173554d

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3 files changed

+173
-31
lines changed

3 files changed

+173
-31
lines changed

‎Coder-Desktop/Coder-Desktop/Coder_DesktopApp.swift‎

Lines changed: 3 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -36,11 +36,13 @@ class AppDelegate: NSObject, NSApplicationDelegate {
3636
overrideinit(){
3737
vpn=CoderVPNService()
3838
state=AppState(onChange: vpn.configureTunnelProviderProtocol)
39-
fileSyncDaemon=MutagenDaemon()
4039
if state.startVPNOnLaunch{
4140
vpn.startWhenReady=true
4241
}
4342
vpn.installSystemExtension()
43+
fileSyncDaemon=MutagenDaemon(
44+
mutagenPath:Bundle.main.url(forResource:"mutagen-darwin-arm64", withExtension:nil)
45+
)
4446
}
4547

4648
func applicationDidFinishLaunching(_:Notification){
@@ -73,10 +75,6 @@ class AppDelegate: NSObject, NSApplicationDelegate {
7375
state.reconfigure()
7476
}
7577
}
76-
// TODO: Start the daemon only once a file sync is configured
77-
Task{
78-
await fileSyncDaemon.start()
79-
}
8078
}
8179

8280
deinit{

‎Coder-Desktop/VPNLib/FileSync/FileSyncDaemon.swift‎

Lines changed: 165 additions & 25 deletions
Original file line numberDiff line numberDiff line change
@@ -2,13 +2,26 @@ import Foundation
22
import GRPC
33
import NIO
44
import os
5+
import Semaphore
56
import Subprocess
7+
import SwiftUI
68

79
@MainActor
810
publicprotocolFileSyncDaemon:ObservableObject{
911
varstate:DaemonState{get}
10-
func start()async
12+
func start()asyncthrows(DaemonError)
1113
func stop()async
14+
func listSessions()asyncthrows->[FileSyncSession]
15+
func createSession(with:FileSyncSession)asyncthrows
16+
}
17+
18+
publicstructFileSyncSession{
19+
publicletid:String
20+
publicletname:String
21+
publicletlocalPath:URL
22+
publicletworkspace:String
23+
publicletagent:String
24+
publicletremotePath:URL
1225
}
1326

1427
@MainActor
@@ -17,7 +30,14 @@ public class MutagenDaemon: FileSyncDaemon {
1730

1831
@Publishedpublicvarstate:DaemonState=.stopped{
1932
didSet{
20-
logger.info("daemon state changed:\(self.state.description, privacy:.public)")
33+
logger.info("daemon state set:\(self.state.description, privacy:.public)")
34+
if case.failed= state{
35+
Task{
36+
try?awaitcleanupGRPC()
37+
}
38+
mutagenProcess?.kill()
39+
mutagenProcess=nil
40+
}
2141
}
2242
}
2343

@@ -26,46 +46,61 @@ public class MutagenDaemon: FileSyncDaemon {
2646
privateletmutagenDataDirectory:URL
2747
privateletmutagenDaemonSocket:URL
2848

49+
// Non-nil when the daemon is running
2950
privatevargroup:MultiThreadedEventLoopGroup?
3051
privatevarchannel:GRPCChannel?
31-
privatevarclient:Daemon_DaemonAsyncClient?
32-
33-
publicinit(){
34-
#if arch(arm64)
35-
mutagenPath=Bundle.main.url(forResource:"mutagen-darwin-arm64", withExtension:nil)
36-
#elseif arch(x86_64)
37-
mutagenPath=Bundle.main.url(forResource:"mutagen-darwin-amd64", withExtension:nil)
38-
#else
39-
fatalError("unknown architecture")
40-
#endif
41-
mutagenDataDirectory=FileManager.default.urls(
42-
for:.applicationSupportDirectory,
43-
in:.userDomainMask
44-
).first!.appending(path:"Coder Desktop").appending(path:"Mutagen")
52+
privatevarclient:DaemonClient?
53+
54+
// Protect start & stop transitions against re-entrancy
55+
privatelettransition=AsyncSemaphore(value:1)
56+
57+
publicinit(mutagenPath:URL?=nil,
58+
mutagenDataDirectory:URL=FileManager.default.urls(
59+
for:.applicationSupportDirectory,
60+
in:.userDomainMask
61+
).first!.appending(path:"Coder Desktop").appending(path:"Mutagen"))
62+
{
63+
self.mutagenPath= mutagenPath
64+
self.mutagenDataDirectory= mutagenDataDirectory
4565
mutagenDaemonSocket= mutagenDataDirectory.appending(path:"daemon").appending(path:"daemon.sock")
4666
// It shouldn't be fatal if the app was built without Mutagen embedded,
4767
// but file sync will be unavailable.
4868
if mutagenPath==nil{
4969
logger.warning("Mutagen not embedded in app, file sync will be unavailable")
5070
state=.unavailable
71+
return
72+
}
73+
74+
// If there are sync sessions, the daemon should be running
75+
Task{
76+
dothrows(DaemonError){
77+
tryawaitstart()
78+
} catch{
79+
state=.failed(error)
80+
return
81+
}
82+
awaitstopIfNoSessions()
5183
}
5284
}
5385

54-
publicfunc start()async{
86+
publicfunc start()asyncthrows(DaemonError){
5587
if case.unavailable= state{return}
5688

5789
// Stop an orphaned daemon, if there is one
5890
try?awaitconnect()
5991
awaitstop()
6092

93+
await transition.wait()
94+
defer{ transition.signal()}
95+
logger.info("starting mutagen daemon")
96+
6197
mutagenProcess=createMutagenProcess()
6298
// swiftlint:disable:next large_tuple
6399
let(standardOutput, standardError, waitForExit):(Pipe.AsyncBytes,Pipe.AsyncBytes,@Sendable()async->Void)
64100
do{
65101
(standardOutput, standardError, waitForExit)=try mutagenProcess!.run()
66102
}catch{
67-
state=.failed(DaemonError.daemonStartFailure(error))
68-
return
103+
throw.daemonStartFailure(error)
69104
}
70105

71106
Task{
@@ -85,10 +120,11 @@ public class MutagenDaemon: FileSyncDaemon {
85120
do{
86121
tryawaitconnect()
87122
}catch{
88-
state=.failed(DaemonError.daemonStartFailure(error))
89-
return
123+
throw.daemonStartFailure(error)
90124
}
91125

126+
tryawaitwaitForDaemonStart()
127+
92128
state=.running
93129
logger.info(
94130
"""
@@ -98,6 +134,34 @@ public class MutagenDaemon: FileSyncDaemon {
98134
)
99135
}
100136

137+
// The daemon takes a moment to open the socket, and we don't want to hog the main actor
138+
// so poll for it on a background thread
139+
privatefunc waitForDaemonStart(
140+
maxAttempts:Int=5,
141+
attemptInterval:Duration=.milliseconds(100)
142+
)asyncthrows(DaemonError){
143+
do{
144+
tryawaitTask.detached(priority:.background){
145+
forattemptin0... maxAttempts{
146+
do{
147+
_=tryawaitself.client!.mgmt.version(
148+
Daemon_VersionRequest(),
149+
callOptions:.init(timeLimit:.timeout(.milliseconds(500)))
150+
)
151+
return
152+
}catch{
153+
if attempt== maxAttempts{
154+
throw error
155+
}
156+
try?awaitTask.sleep(for: attemptInterval)
157+
}
158+
}
159+
}.value
160+
}catch{
161+
throw.daemonStartFailure(error)
162+
}
163+
}
164+
101165
privatefunc connect()asyncthrows(DaemonError){
102166
guard client==nilelse{
103167
// Already connected
@@ -110,14 +174,17 @@ public class MutagenDaemon: FileSyncDaemon {
110174
transportSecurity:.plaintext,
111175
eventLoopGroup: group!
112176
)
113-
client=Daemon_DaemonAsyncClient(channel: channel!)
177+
client=DaemonClient(
178+
mgmt:Daemon_DaemonAsyncClient(channel: channel!),
179+
sync:Synchronization_SynchronizationAsyncClient(channel: channel!)
180+
)
114181
logger.info(
115182
"Successfully connected to mutagen daemon, socket:\(self.mutagenDaemonSocket.path, privacy:.public)"
116183
)
117184
}catch{
118185
logger.error("Failed to connect to gRPC:\(error)")
119186
try?awaitcleanupGRPC()
120-
throwDaemonError.connectionFailure(error)
187+
throw.connectionFailure(error)
121188
}
122189
}
123190

@@ -132,6 +199,10 @@ public class MutagenDaemon: FileSyncDaemon {
132199

133200
publicfunc stop()async{
134201
if case.unavailable= state{return}
202+
await transition.wait()
203+
defer{ transition.signal()}
204+
logger.info("stopping mutagen daemon")
205+
135206
state=.stopped
136207
guardFileManager.default.fileExists(atPath: mutagenDaemonSocket.path)else{
137208
// Already stopped
@@ -140,7 +211,7 @@ public class MutagenDaemon: FileSyncDaemon {
140211

141212
// "We don't check the response or error, because the daemon
142213
// may terminate before it has a chance to send the response."
143-
_=try?await client?.terminate(
214+
_=try?await client?.mgmt.terminate(
144215
Daemon_TerminateRequest(),
145216
callOptions:.init(timeLimit:.timeout(.milliseconds(500)))
146217
)
@@ -175,6 +246,7 @@ public class MutagenDaemon: FileSyncDaemon {
175246
"""
176247
)
177248
state=.failed(.terminatedUnexpectedly)
249+
return
178250
}
179251
}
180252

@@ -183,6 +255,55 @@ public class MutagenDaemon: FileSyncDaemon {
183255
logger.info("\(line, privacy:.public)")
184256
}
185257
}
258+
259+
publicfunc listSessions()asyncthrows->[FileSyncSession]{
260+
guard case.running= stateelse{
261+
return[]
262+
}
263+
// TODO: Implement
264+
return[]
265+
}
266+
267+
publicfunc createSession(with _:FileSyncSession)asyncthrows{
268+
if case.stopped= state{
269+
dothrows(DaemonError){
270+
tryawaitstart()
271+
} catch{
272+
state=.failed(error)
273+
return
274+
}
275+
}
276+
// TODO: Add Session
277+
}
278+
279+
publicfunc deleteSession()asyncthrows{
280+
// TODO: Delete session
281+
awaitstopIfNoSessions()
282+
}
283+
284+
privatefunc stopIfNoSessions()async{
285+
letsessions:Synchronization_ListResponse
286+
do{
287+
sessions=tryawait client!.sync.list(Synchronization_ListRequest.with{ reqin
288+
req.selection=.with{ selectionin
289+
selection.all=true
290+
}
291+
})
292+
}catch{
293+
state=.failed(.daemonStartFailure(error))
294+
return
295+
}
296+
// If there's no configured sessions, the daemon doesn't need to be running
297+
if sessions.sessionStates.isEmpty{
298+
logger.info("No sync sessions found")
299+
awaitstop()
300+
}
301+
}
302+
}
303+
304+
structDaemonClient{
305+
letmgmt:Daemon_DaemonAsyncClient
306+
letsync:Synchronization_SynchronizationAsyncClient
186307
}
187308

188309
publicenumDaemonState{
@@ -191,7 +312,7 @@ public enum DaemonState {
191312
case failed(DaemonError)
192313
case unavailable
193314

194-
vardescription:String{
315+
publicvardescription:String{
195316
switchself{
196317
case.running:
197318
"Running"
@@ -203,12 +324,27 @@ public enum DaemonState {
203324
"Unavailable"
204325
}
205326
}
327+
328+
publicvarcolor:Color{
329+
switchself{
330+
case.running:
331+
.green
332+
case.stopped:
333+
.gray
334+
case.failed:
335+
.red
336+
case.unavailable:
337+
.gray
338+
}
339+
}
206340
}
207341

208342
publicenumDaemonError:Error{
343+
case daemonNotRunning
209344
case daemonStartFailure(Error)
210345
case connectionFailure(Error)
211346
case terminatedUnexpectedly
347+
case grpcFailure(Error)
212348

213349
vardescription:String{
214350
switchself{
@@ -218,6 +354,10 @@ public enum DaemonError: Error {
218354
"Connection failure:\(error)"
219355
case.terminatedUnexpectedly:
220356
"Daemon terminated unexpectedly"
357+
case.daemonNotRunning:
358+
"The daemon must be started first"
359+
caselet.grpcFailure(error):
360+
"Failed to communicate with daemon:\(error)"
221361
}
222362
}
223363

‎Coder-Desktop/project.yml‎

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -116,7 +116,10 @@ packages:
116116
exactVersion:1.24.2
117117
Subprocess:
118118
url:https://github.com/jamf/Subprocess
119-
revision:9d67b79
119+
revision:9d67b79
120+
Semaphore:
121+
url:https://github.com/groue/Semaphore/
122+
exactVersion:0.1.0
120123

121124
targets:
122125
Coder Desktop:
@@ -276,6 +279,7 @@ targets:
276279
product:SwiftProtobufPluginLibrary
277280
-package:GRPC
278281
-package:Subprocess
282+
-package:Semaphore
279283
-target:CoderSDK
280284
embed:false
281285

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