Revert "GODT-2013: CLI flag for frontend is required."

This reverts commit 4bb29b1b5c.

internal/app/base/base.go

@@ -69,9 +69,8 @@ const (
 	flagMemProfileShort = "m"
 	flagLogLevel        = "log-level"
 	flagLogLevelShort   = "l"
-	FlagGRPC            = "grpc" // FlagGRPC starts the gRPC frontend
+	// FlagCLI indicate to start with command line interface.
-	FlagGRPCShort       = "g"
+	FlagCLI      = "cli"
-	FlagCLI             = "cli" // FlagCLI indicate to start with command line interface.
 	flagCLIShort = "c"
 	flagRestart  = "restart"
 	FlagLauncher = "launcher"
@@ -300,11 +299,6 @@ func (b *Base) NewApp(mainLoop func(*Base, *cli.Context) error) *cli.App {
 			Aliases: []string{flagLogLevelShort},
 			Usage:   "Set the log level (one of panic, fatal, error, warn, info, debug)",
 		},
-		&cli.BoolFlag{
-			Name:    FlagGRPC,
-			Aliases: []string{FlagGRPCShort},
-			Usage:   "Start the gRPC service",
-		},
 		&cli.BoolFlag{
 			Name:    FlagCLI,
 			Aliases: []string{flagCLIShort},

internal/app/bridge/bridge.go

@@ -43,7 +43,7 @@ const (
 	flagLogIMAP        = "log-imap"
 	flagLogSMTP        = "log-smtp"
 	flagNonInteractive = "noninteractive"
-	flagNonInteractiveShort = "n"
+
 	// Memory cache was estimated by empirical usage in the past, and it was set to 100MB.
 	// NOTE: This value must not be less than maximal size of one email (~30MB).
 	inMemoryCacheLimit = 100 * (1 << 20)
@@ -63,7 +63,6 @@ func New(base *base.Base) *cli.App {
 		},
 		&cli.BoolFlag{
 			Name:  flagNonInteractive,
-			Aliases: []string{flagNonInteractiveShort},
 			Usage: "Start Bridge entirely non-interactively",
 		},
 	}...)
@@ -73,11 +72,6 @@ func New(base *base.Base) *cli.App {
 
 func main(b *base.Base, c *cli.Context) error { //nolint:funlen
 	frontendType := getFrontendTypeFromCLIParams(c)
-	if frontendType == frontend.Unknown {
-		_ = cli.ShowAppHelp(c)
-		return errors.New("no frontend was specified. Use --grpc, --cli or --noninteractive")
-	}
-
 	f := frontend.New(
 		frontendType,
 		!c.Bool(base.FlagNoWindow),
@@ -177,14 +171,12 @@ func main(b *base.Base, c *cli.Context) error { //nolint:funlen
 
 func getFrontendTypeFromCLIParams(c *cli.Context) frontend.Type {
 	switch {
-	case c.Bool(base.FlagGRPC):
-		return frontend.GRPC
 	case c.Bool(base.FlagCLI):
 		return frontend.CLI
 	case c.Bool(flagNonInteractive):
 		return frontend.NonInteractive
 	default:
-		return frontend.Unknown
+		return frontend.GRPC
 	}
 }
 

internal/frontend/bridge-gui/bridge-gui/main.cpp

@@ -257,7 +257,7 @@ void launchBridge(QStringList const &args)
     else
         app().log().debug(QString("Bridge executable path: %1").arg(QDir::toNativeSeparators(bridgeExePath)));
 
-    overseer = std::make_unique<Overseer>(new ProcessMonitor(bridgeExePath, QStringList("--grpc") + args, nullptr), nullptr);
+    overseer = std::make_unique<Overseer>(new ProcessMonitor(bridgeExePath, args, nullptr), nullptr);
     overseer->startWorker(true);
 }
 

internal/frontend/frontend.go

@@ -25,7 +25,6 @@ import (
 	"github.com/ProtonMail/proton-bridge/v2/internal/locations"
 	"github.com/ProtonMail/proton-bridge/v2/internal/updater"
 	"github.com/ProtonMail/proton-bridge/v2/pkg/listener"
-	"github.com/sirupsen/logrus"
 )
 
 // Type describes the available types of frontend.
@@ -35,7 +34,6 @@ const (
 	CLI Type = iota
 	GRPC
 	NonInteractive
-	Unknown
 )
 
 type Frontend interface {
@@ -47,7 +45,7 @@ type Frontend interface {
 	WaitUntilFrontendIsReady()
 }
 
-// New returns initialized frontend based on `frontendType`, which can be `CLI` or `GRPC`. Non-interactive will return a nil frontend.
+// New returns initialized frontend based on `frontendType`, which can be `CLI` or `GRPC`.
 func New(
 	frontendType Type,
 	showWindowOnStart bool,
@@ -77,13 +75,9 @@ func New(
 		)
 
 	case NonInteractive:
-		return nil
-
-	case Unknown:
 		fallthrough
 
 	default:
-		logrus.Panicf("Unexpected frontend value %v", frontendType)
+		return nil
-		return nil // return statement is required by compiler, although the above call will panic.
 	}
 }