Add updates module and fix issues

ui/launch.go

@@ -0,0 +1,66 @@
+package ui
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"os"
+	"os/exec"
+	"runtime"
+
+	"github.com/Safing/portbase/modules"
+	"github.com/Safing/portmaster/updates"
+)
+
+var (
+	launchUI bool
+)
+
+func init() {
+	flag.BoolVar(&launchUI, "ui", false, "launch user interface and exit")
+}
+
+func launchUIByFlag() error {
+	if !launchUI {
+		return nil
+	}
+
+	err := updates.ReloadLatest()
+	if err != nil {
+		return err
+	}
+
+	osAndPlatform := fmt.Sprintf("%s_%s", runtime.GOOS, runtime.GOARCH)
+
+	switch osAndPlatform {
+	case "linux_amd64":
+
+		file, err := updates.GetPlatformFile("app/portmaster-ui")
+		if err != nil {
+			return fmt.Errorf("ui currently not available: %s - you may need to first start portmaster and wait for it to fetch the update index", err)
+		}
+
+		// check permission
+		info, err := os.Stat(file.Path())
+		if info.Mode() != 0755 {
+			fmt.Printf("%v\n", info.Mode())
+			err := os.Chmod(file.Path(), 0755)
+			if err != nil {
+				return fmt.Errorf("failed to set exec permissions on %s: %s", file.Path(), err)
+			}
+		}
+
+		// exec
+		cmd := exec.Command(file.Path())
+		err = cmd.Start()
+		if err != nil {
+			return fmt.Errorf("failed to start ui: %s", err)
+		}
+
+		// gracefully exit portmaster
+		return modules.ErrCleanExit
+
+	default:
+		return errors.New("this os/platform is no UI support yet")
+	}
+}