add(command): overwrite arguments for app entry with provided arguments

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"os"
 
 	"github.com/spf13/viper"
 	"yves-biener.de/wish-serve/internal/serve"
@@ -30,9 +31,29 @@ func loadConfig() {
 	}
 }
 
+// Overwrite (default) configuration value for the application to serve with
+// given command line arguments.
+//
+// NOTE: This will also overwrite the configuration for the `app` entry from the
+// configuration file.
+func overwriteServeCommand() {
+	if len(os.Args) >= 2 {
+		name := os.Args[1]
+		viper.Set("app.name", name)
+		if len(os.Args) >= 3 {
+			args := os.Args[2:]
+			viper.Set("app.args", args)
+		} else {
+			// no arguments provided -> clear app arguments
+			viper.Set("app.args", []string{})
+		}
+	}
+}
+
 func main() {
 	createDefaultConfig()
 	loadConfig()
+	overwriteServeCommand()
 
 	serve.Serve(
 		viper.GetString("host"),