Other: Single instance

internal/app/frontend.go

@@ -0,0 +1,39 @@
+package app
+
+import (
+	"fmt"
+
+	"github.com/ProtonMail/proton-bridge/v2/internal/bridge"
+	"github.com/ProtonMail/proton-bridge/v2/internal/crash"
+	"github.com/ProtonMail/proton-bridge/v2/internal/events"
+	bridgeCLI "github.com/ProtonMail/proton-bridge/v2/internal/frontend/cli"
+	"github.com/ProtonMail/proton-bridge/v2/internal/frontend/grpc"
+	"github.com/ProtonMail/proton-bridge/v2/internal/locations"
+	"github.com/ProtonMail/proton-bridge/v2/pkg/restarter"
+	"github.com/urfave/cli/v2"
+)
+
+func runFrontend(
+	c *cli.Context,
+	crashHandler *crash.Handler,
+	restarter *restarter.Restarter,
+	locations *locations.Locations,
+	bridge *bridge.Bridge,
+	eventCh <-chan events.Event,
+) error {
+	switch {
+	case c.Bool(flagCLI):
+		return bridgeCLI.New(bridge, eventCh).Loop()
+
+	case c.Bool(flagNonInteractive):
+		select {}
+
+	default:
+		service, err := grpc.NewService(crashHandler, restarter, locations, bridge, eventCh, !c.Bool(flagNoWindow))
+		if err != nil {
+			return fmt.Errorf("could not create service: %w", err)
+		}
+
+		return service.Loop()
+	}
+}