Add CLI tool for validating the config.json file (#6041)

cmd/platform/config.go

@@ -0,0 +1,66 @@
+// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/mattermost/platform/model"
+	"github.com/mattermost/platform/utils"
+	"github.com/spf13/cobra"
+	"os"
+)
+
+var configCmd = &cobra.Command{
+	Use:   "config",
+	Short: "Configuration",
+}
+
+var validateConfigCmd = &cobra.Command{
+	Use:   "validate",
+	Short: "Validate config file",
+	Run:   configValidateCmdF,
+}
+
+func init() {
+	configCmd.AddCommand(
+		validateConfigCmd,
+	)
+}
+
+func configValidateCmdF(cmd *cobra.Command, args []string) {
+	utils.TranslationsPreInit()
+	filePath, err := cmd.Flags().GetString("config")
+	if err != nil {
+		CommandPrintErrorln(err)
+		return
+	}
+
+	filePath = utils.FindConfigFile(filePath)
+
+	file, err := os.Open(filePath)
+	if err != nil {
+		CommandPrintErrorln(err)
+		return
+	}
+
+	decoder := json.NewDecoder(file)
+	config := model.Config{}
+	err = decoder.Decode(&config)
+	if err != nil {
+		CommandPrintErrorln(err)
+		return
+	}
+
+	if _, err := file.Stat(); err != nil {
+		CommandPrintErrorln(err)
+		return
+	}
+
+	if err := config.IsValid(); err != nil {
+		CommandPrintErrorln(errors.New(utils.T(err.Id)))
+		return
+	}
+
+	CommandPrettyPrintln("The document is valid")
+}