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Fix: Reduce tray memory - #60
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…single-instance support with orphan-process protection
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Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The lifecycle changes appear to restrict Linux-specific backend handling appropriately, but the existing macOS compilation concern lacks sufficient current-head evidence for closure and should be confirmed before merge. Sequence Diagram(s)sequenceDiagram
participant NovaInicializacao
participant PluginInstanciaUnica
participant Tray
participant SessionState
participant JanelaPrincipal
NovaInicializacao->>PluginInstanciaUnica: inicia o aplicativo
PluginInstanciaUnica->>Tray: chama show_main_window
Tray->>SessionState: incrementa hide_epoch sob bloqueio
Tray->>JanelaPrincipal: mostra ou recria a janela
JanelaPrincipal->>Tray: solicita fechamento
Tray->>JanelaPrincipal: oculta a janela
Tray->>SessionState: agenda destruição por 180 segundos
Tray->>JanelaPrincipal: destrói se o epoch permanecer válido
Tray->>SessionState: marca quitting para saída explícita
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✅ Passed checks (4 passed)
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Inline comments:
In `@frontend/src-tauri/src/backend.rs`:
- Line 83: Restrict the parent-death hook guarded at the visible cfg points to
Linux by replacing both #[cfg(unix)] annotations around libc::prctl and
libc::PR_SET_PDEATHSIG with #[cfg(target_os = "linux")]. Update the libc
dependency configuration to use the target-specific Linux dependency section.
In `@frontend/src-tauri/src/lib.rs`:
- Around line 96-99: Protect the hide-timer sequence around the hide_epoch
check, get_webview_window("main"), and destroy() with a shared lifecycle lock.
Reuse that same lock in the paths that increment the epoch, show the window, or
recreate it, including tray::show_main_window, so reopening cannot occur between
validation and destruction.
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frontend/src-tauri/Cargo.lockis excluded by!**/*.lock
📒 Files selected for processing (8)
backend/internal/domain/model/version.gofrontend/package.jsonfrontend/src-tauri/Cargo.tomlfrontend/src-tauri/src/backend.rsfrontend/src-tauri/src/lib.rsfrontend/src-tauri/src/session.rsfrontend/src-tauri/src/tray.rsfrontend/src-tauri/tauri.conf.json
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… synchronization and refine Linux-specific backend process handling
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Summary
Fixes high background RAM usage: when minimized to the tray, the main window is now hidden immediately and, after a grace period (3 minutes) of staying hidden, is actually destroyed to release the WebView (WebKitGTK/WebView2/WKWebView) from memory. Reopening within the grace period is instant (window is just unhidden); reopening after it has elapsed rebuilds the window from scratch and reuses the existing splash screen so the transition looks the same as first launch instead of a blank window mid-render.
Since Tauri exits the process once the last window is destroyed, the app now also intercepts
ExitRequestedto keep running (tray + Go backend) with zero windows open — while still allowing a real exit when the user explicitly quits from the tray (tracked via aquittingflag, sinceapp.exit(0)itself raises the sameExitRequestedevent).Additionally fixes two related "zombie process" issues:
.AppImage) while an instance was already running in the tray spawned a whole second Tauri + WebKit process. Addedtauri-plugin-single-instanceto intercept this and just focus the existing window instead.kill -9, session logout). On Unix, the child process now dies with the parent viaPR_SET_PDEATHSIG.Related issue
Closes #
Type of change
How was this tested?
ps -eo pid,%cpu,rss,comm | grep -iE 'devaulty|WebKit') that the WebKit process disappears from the process list after minimizing to the tray and staying hidden past the grace period, and reappears only after reopening.kill -9and confirmed the Go backend process terminates alongside it instead of becoming orphaned..AppImage/installed binary while one was already running in the tray and confirmed it just focuses the existing window instead of spawning a duplicate process.ExitRequestedfromapp.exit(0)was being swallowed by the same handler that keeps the app alive after the main window is destroyed).Checklist
CONTRIBUTING.md.Screenshots or recordings
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