Add optional --config option

main.go

@@ -8,25 +8,27 @@ import (
 	"github.com/akamensky/argparse"
 )
 
+var config Configuration
+
 func summary() {
 	fmt.Println("Summary")
 }
 
 func main() {
 	parser := argparse.NewParser("gitivity", "Command line tool to get Gitea statistics")
-
 	Summary := parser.NewCommand("summary", "Generate a summary of a user's activity.")	
+	config_path := parser.String("c", "config", &argparse.Options{Required: false, Help: "Configuration file", Default: "./config.lua"})
 
 	parse_err := parser.Parse(os.Args)
 	if parse_err != nil {
 		fmt.Print(parser.Usage(parse_err))
+		return
 	}
 
-	config := Configuration{}
-	if err := config.Parse("config.lua"); err != nil {
-		panic("Failed to parse configuration file: "+fmt.Sprint(err))
+	config = Configuration{}
+	if err := config.Parse(*config_path); err != nil {
+		panic("Failed to parse configuration file")
 	}
-	fmt.Printf("config.servers: %v\n", config.servers)
 
 	//client, err := gitea.NewClient(*server_name)
 	//if err != nil {