piotr
a31bed8aeb
Kiosk process owns its display lifecycle: waits for X11, keeps the fullscreen black canvas below video, stops deterministically on signal. Supervisor starts it before video, restarts only on process death, and shuts the whole process group down; X11 downtime never restarts the supervisor. Per-target opener/template abstractions for future MIPI.
48 lines
1.4 KiB
Go
48 lines
1.4 KiB
Go
// Command groundstation-display renders the Ground Station kiosk canvas. It
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// owns its display lifecycle independently of WFB, the transmitter and the
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// video launcher: it waits for its target to appear, redraws as needed, and
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// stops only when it receives SIGINT or SIGTERM.
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package main
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import (
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"context"
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"flag"
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"fmt"
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"log"
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"os"
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"os/signal"
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"syscall"
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"git.piksar.eu/piotr/groundstation/internal/display"
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)
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// buildTarget selects the target-specific opener and template. Each target
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// owns its own backend and layouts; there is no shared global template.
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func buildTarget(name string) (display.Opener, display.Template, error) {
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switch name {
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case "x11":
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return display.X11Opener{}, display.NewStatusTemplate("Brak polaczenia WFB"), nil
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default:
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return nil, nil, fmt.Errorf("unknown display target %q (supported: x11)", name)
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}
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}
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func main() {
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target := flag.String("target", "x11", "display target: x11 (Viture) today; mipi planned")
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flag.Parse()
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opener, template, err := buildTarget(*target)
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if err != nil {
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log.Fatal(err)
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}
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ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
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defer stop()
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// Temporary X11 unavailability never exits this process; display.Run
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// keeps retrying internally until the context is cancelled.
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if err := display.Run(ctx, opener, template, display.Options{}); err != nil {
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log.Fatalf("display: %v", err)
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}
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}
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