Merge pull request #1410 from DiceDB/arpit-config-v2

Configuration v2 - Simple, Readable, and Consistent

.gitignore

@@ -35,3 +35,5 @@ pnpm-debug.log*
 
 # macOS-specific files
 .DS_Store
+dicedb.yaml
+dicedb.conf

cmd/init_config.go

@@ -0,0 +1,26 @@
+// Copyright (c) 2022-present, DiceDB contributors
+// All rights reserved. Licensed under the BSD 3-Clause License. See LICENSE file in the project root for full license information.
+
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/dicedb/dice/config"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var initConfigCmd = &cobra.Command{
+	Use:   "init-config",
+	Short: "creates a config file at dicedb.yaml with default values",
+	Run: func(cmd *cobra.Command, args []string) {
+		config.Init(cmd.Flags())
+		_ = viper.WriteConfigAs("dicedb.yaml")
+		fmt.Println("config created at dicedb.yaml")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(initConfigCmd)
+}

cmd/root.go

@@ -0,0 +1,54 @@
+// Copyright (c) 2022-present, DiceDB contributors
+// All rights reserved. Licensed under the BSD 3-Clause License. See LICENSE file in the project root for full license information.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"reflect"
+	"strconv"
+
+	"github.com/dicedb/dice/config"
+	"github.com/dicedb/dice/server"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	c := config.DiceDBConfig{}
+	_type := reflect.TypeOf(c)
+	for i := 0; i < _type.NumField(); i++ {
+		field := _type.Field(i)
+		yamlTag := field.Tag.Get("mapstructure")
+		descriptionTag := field.Tag.Get("description")
+		defaultTag := field.Tag.Get("default")
+
+		switch field.Type.Kind() {
+		case reflect.String:
+			rootCmd.PersistentFlags().String(yamlTag, defaultTag, descriptionTag)
+		case reflect.Int:
+			val, _ := strconv.Atoi(defaultTag)
+			rootCmd.PersistentFlags().Int(yamlTag, val, descriptionTag)
+		case reflect.Bool:
+			val, _ := strconv.ParseBool(defaultTag)
+			rootCmd.PersistentFlags().Bool(yamlTag, val, descriptionTag)
+		}
+	}
+}
+
+var rootCmd = &cobra.Command{
+	Use:   "dicedb",
+	Short: "an in-memory database;",
+	Run: func(cmd *cobra.Command, args []string) {
+		config.Init(cmd.Flags())
+		server.Init()
+		server.Start()
+	},
+}
+
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}