initial

questions/config/config.go

@@ -0,0 +1,51 @@
+package config
+
+import (
+	"fmt"
+	"local/args"
+	"local/storage"
+)
+
+type Config struct {
+	Addr string
+	DB   storage.DB
+}
+
+var config Config
+
+func New() error {
+	as := args.NewArgSet()
+	as.Append(args.INT, "p", "port to listen on", 39981)
+	as.Append(args.STRING, "db", "db type to use", "map")
+	as.Append(args.STRING, "dbns", "db namespace", "")
+	as.Append(args.STRING, "dbaddr", "db's address or path", "")
+	as.Append(args.STRING, "dbuser", "db's username", "")
+	as.Append(args.STRING, "dbpass", "db's password", "")
+	err := as.Parse()
+	if err != nil {
+		return err
+	}
+	db, err := storage.New(
+		storage.TypeFromString(as.Get("db").GetString()),
+		as.Get("dbaddr").GetString(),
+		as.Get("dbuser").GetString(),
+		as.Get("dbpass").GetString(),
+	)
+	if err != nil {
+		return err
+	}
+	was := config.DB
+	config = Config{
+		Addr: fmt.Sprintf(":%d", as.Get("p").GetInt()),
+		DB:   db,
+	}
+	if was != nil {
+		was.Close()
+	}
+	storage.DefaultNamespace = as.Get("dbns").GetString()
+	return err
+}
+
+func Get() Config {
+	return config
+}