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ethanndicksonethanndickson
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feat: add file sync daemon error handling to the UI (#122)
If file sync is working, but a session has errored, an icon will be displayed on the main menu. e.g. for: <img width="512" alt="image" src="https://github.com/user-attachments/assets/aac73c99-e318-44d3-9091-3f5d99239037" /> This icon & tooltip are displayed: <img width="256" alt="image" src="https://github.com/user-attachments/assets/f4b7ba15-dca2-4819-aaa8-07e74e4e238d" /> If file sync is not working altogether, due to the daemon crashing, the same icon will be displayed with a different tooltip on hover: <img width="254" alt="image" src="https://github.com/user-attachments/assets/efc87c1d-acac-4353-a3c9-c04908762d28" /> Once the config menu is opened, an alert is displayed, and the daemon log file is opened. <img width="1354" alt="image" src="https://github.com/user-attachments/assets/98b44f6e-4584-4ad3-a237-1557ec5edab1" /> From there, the Daemon can be restarted, or the alert can be dismissed without restarting. The latter provides users an out if the daemon were to crash on launch repeatedly.
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‎Coder-Desktop/Coder-Desktop/Preview Content/PreviewFileSync.swift

+3-1
Original file line numberDiff line numberDiff line change
@@ -2,6 +2,8 @@ import VPNLib
22

33
@MainActor
44
final class PreviewFileSync: FileSyncDaemon {
5+
var logFile: URL = .init(filePath: "~/log.txt")!
6+
57
var sessionState: [VPNLib.FileSyncSession] = []
68

79
var state: DaemonState = .running
@@ -10,7 +12,7 @@ final class PreviewFileSync: FileSyncDaemon {
1012

1113
func refreshSessions() async {}
1214

13-
func start() async throws(DaemonError) {
15+
func tryStart() async {
1416
state = .running
1517
}
1618

‎Coder-Desktop/Coder-Desktop/Views/FileSync/FileSyncConfig.swift

+123-68
Original file line numberDiff line numberDiff line change
@@ -11,6 +11,8 @@ struct FileSyncConfig<VPN: VPNService, FS: FileSyncDaemon>: View {
1111

1212
@State private var loading: Bool = false
1313
@State private var deleteError: DaemonError?
14+
@State private var isVisible: Bool = false
15+
@State private var dontRetry: Bool = false
1416

1517
var body: some View {
1618
Group {
@@ -36,87 +38,140 @@ struct FileSyncConfig<VPN: VPNService, FS: FileSyncDaemon>: View {
3638
.frame(minWidth: 400, minHeight: 200)
3739
.padding(.bottom, 25)
3840
.overlay(alignment: .bottom) {
39-
VStack(alignment: .leading, spacing: 0) {
40-
Divider()
41-
HStack(spacing: 0) {
42-
Button {
43-
addingNewSession = true
44-
} label: {
45-
Image(systemName: "plus")
46-
.frame(width: 24, height: 24)
47-
}.disabled(vpn.menuState.agents.isEmpty)
41+
tableFooter
42+
}
43+
// Only the table & footer should be disabled if the daemon has crashed
44+
// otherwise the alert buttons will be disabled too
45+
}.disabled(fileSync.state.isFailed)
46+
.sheet(isPresented: $addingNewSession) {
47+
FileSyncSessionModal<VPN, FS>()
48+
.frame(width: 700)
49+
}.sheet(item: $editingSession) { session in
50+
FileSyncSessionModal<VPN, FS>(existingSession: session)
51+
.frame(width: 700)
52+
}.alert("Error", isPresented: Binding(
53+
get: { deleteError != nil },
54+
set: { isPresented in
55+
if !isPresented {
56+
deleteError = nil
57+
}
58+
}
59+
)) {} message: {
60+
Text(deleteError?.description ?? "An unknown error occurred.")
61+
}.alert("Error", isPresented: Binding(
62+
// We only show the alert if the file config window is open
63+
// Users will see the alert symbol on the menu bar to prompt them to
64+
// open it. The requirement on `!loading` prevents the alert from
65+
// re-opening immediately.
66+
get: { !loading && isVisible && fileSync.state.isFailed },
67+
set: { isPresented in
68+
if !isPresented {
69+
if dontRetry {
70+
dontRetry = false
71+
return
72+
}
73+
loading = true
74+
Task {
75+
await fileSync.tryStart()
76+
loading = false
77+
}
78+
}
79+
}
80+
)) {
81+
Button("Retry") {}
82+
// This gives the user an out if the daemon is crashing on launch,
83+
// they can cancel the alert, and it will reappear if they re-open the
84+
// file sync window.
85+
Button("Cancel", role: .cancel) {
86+
dontRetry = true
87+
}
88+
} message: {
89+
Text("""
90+
File sync daemon failed. The daemon log file at\n\(fileSync.logFile.path)\nhas been opened.
91+
""").onAppear {
92+
// Open the log file in the default editor
93+
NSWorkspace.shared.open(fileSync.logFile)
94+
}
95+
}.task {
96+
// When the Window is visible, poll for session updates every
97+
// two seconds.
98+
while !Task.isCancelled {
99+
if !fileSync.state.isFailed {
100+
await fileSync.refreshSessions()
101+
}
102+
try? await Task.sleep(for: .seconds(2))
103+
}
104+
}.onAppear {
105+
isVisible = true
106+
}.onDisappear {
107+
isVisible = false
108+
// If the failure alert is dismissed without restarting the daemon,
109+
// (by clicking cancel) this makes it clear that the daemon
110+
// is still in a failed state.
111+
}.navigationTitle("Coder File Sync \(fileSync.state.isFailed ? "- Failed" : "")")
112+
.disabled(loading)
113+
}
114+
115+
var tableFooter: some View {
116+
VStack(alignment: .leading, spacing: 0) {
117+
Divider()
118+
HStack(spacing: 0) {
119+
Button {
120+
addingNewSession = true
121+
} label: {
122+
Image(systemName: "plus")
123+
.frame(width: 24, height: 24)
124+
}.disabled(vpn.menuState.agents.isEmpty)
125+
Divider()
126+
Button {
127+
Task {
128+
loading = true
129+
defer { loading = false }
130+
do throws(DaemonError) {
131+
// TODO: Support selecting & deleting multiple sessions at once
132+
try await fileSync.deleteSessions(ids: [selection!])
133+
if fileSync.sessionState.isEmpty {
134+
// Last session was deleted, stop the daemon
135+
await fileSync.stop()
136+
}
137+
} catch {
138+
deleteError = error
139+
}
140+
selection = nil
141+
}
142+
} label: {
143+
Image(systemName: "minus").frame(width: 24, height: 24)
144+
}.disabled(selection == nil)
145+
if let selection {
146+
if let selectedSession = fileSync.sessionState.first(where: { $0.id == selection }) {
48147
Divider()
49148
Button {
50149
Task {
150+
// TODO: Support pausing & resuming multiple sessions at once
51151
loading = true
52152
defer { loading = false }
53-
do throws(DaemonError) {
54-
// TODO: Support selecting & deleting multiple sessions at once
55-
try await fileSync.deleteSessions(ids: [selection!])
56-
if fileSync.sessionState.isEmpty {
57-
// Last session was deleted, stop the daemon
58-
await fileSync.stop()
59-
}
60-
} catch {
61-
deleteError = error
153+
switch selectedSession.status {
154+
case .paused:
155+
try await fileSync.resumeSessions(ids: [selectedSession.id])
156+
default:
157+
try await fileSync.pauseSessions(ids: [selectedSession.id])
62158
}
63-
selection = nil
64159
}
65160
} label: {
66-
Image(systemName: "minus").frame(width: 24, height: 24)
67-
}.disabled(selection == nil)
68-
if let selection {
69-
if let selectedSession = fileSync.sessionState.first(where: { $0.id == selection }) {
70-
Divider()
71-
Button {
72-
Task {
73-
// TODO: Support pausing & resuming multiple sessions at once
74-
loading = true
75-
defer { loading = false }
76-
switch selectedSession.status {
77-
case .paused:
78-
try await fileSync.resumeSessions(ids: [selectedSession.id])
79-
default:
80-
try await fileSync.pauseSessions(ids: [selectedSession.id])
81-
}
82-
}
83-
} label: {
84-
switch selectedSession.status {
85-
case .paused:
86-
Image(systemName: "play").frame(width: 24, height: 24)
87-
default:
88-
Image(systemName: "pause").frame(width: 24, height: 24)
89-
}
90-
}
161+
switch selectedSession.status {
162+
case .paused:
163+
Image(systemName: "play").frame(width: 24, height: 24)
164+
default:
165+
Image(systemName: "pause").frame(width: 24, height: 24)
91166
}
92167
}
93168
}
94-
.buttonStyle(.borderless)
95169
}
96-
.background(.primary.opacity(0.04))
97-
.fixedSize(horizontal: false, vertical: true)
98-
}
99-
}.sheet(isPresented: $addingNewSession) {
100-
FileSyncSessionModal<VPN, FS>()
101-
.frame(width: 700)
102-
}.sheet(item: $editingSession) { session in
103-
FileSyncSessionModal<VPN, FS>(existingSession: session)
104-
.frame(width: 700)
105-
}.alert("Error", isPresented: Binding(
106-
get: { deleteError != nil },
107-
set: { isPresented in
108-
if !isPresented {
109-
deleteError = nil
110-
}
111-
}
112-
)) {} message: {
113-
Text(deleteError?.description ?? "An unknown error occurred.")
114-
}.task {
115-
while !Task.isCancelled {
116-
await fileSync.refreshSessions()
117-
try? await Task.sleep(for: .seconds(2))
118170
}
119-
}.disabled(loading)
171+
.buttonStyle(.borderless)
172+
}
173+
.background(.primary.opacity(0.04))
174+
.fixedSize(horizontal: false, vertical: true)
120175
}
121176
}
122177

‎Coder-Desktop/Coder-Desktop/Views/VPN/VPNMenu.swift

+5-4
Original file line numberDiff line numberDiff line change
@@ -68,11 +68,12 @@ struct VPNMenu<VPN: VPNService, FS: FileSyncDaemon>: View {
6868
} label: {
6969
ButtonRowView {
7070
HStack {
71-
// TODO: A future PR will provide users a way to recover from a daemon failure without
72-
// needing to restart the app
73-
if case .failed = fileSync.state, sessionsHaveError(fileSync.sessionState) {
71+
if fileSync.state.isFailed || sessionsHaveError(fileSync.sessionState) {
7472
Image(systemName: "exclamationmark.arrow.trianglehead.2.clockwise.rotate.90")
75-
.frame(width: 12, height: 12).help("One or more sync sessions have errors")
73+
.frame(width: 12, height: 12)
74+
.help(fileSync.state.isFailed ?
75+
"The file sync daemon encountered an error" :
76+
"One or more file sync sessions have errors")
7677
}
7778
Text("File sync")
7879
}

‎Coder-Desktop/Coder-DesktopTests/Util.swift

+3-3
Original file line numberDiff line numberDiff line change
@@ -29,6 +29,8 @@ class MockVPNService: VPNService, ObservableObject {
2929

3030
@MainActor
3131
class MockFileSyncDaemon: FileSyncDaemon {
32+
var logFile: URL = .init(filePath: "~/log.txt")
33+
3234
var sessionState: [VPNLib.FileSyncSession] = []
3335

3436
func refreshSessions() async {}
@@ -37,9 +39,7 @@ class MockFileSyncDaemon: FileSyncDaemon {
3739

3840
var state: VPNLib.DaemonState = .running
3941

40-
func start() async throws(VPNLib.DaemonError) {
41-
return
42-
}
42+
func tryStart() async {}
4343

4444
func stop() async {}
4545

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