You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: db.go
    path of file: ./repos/mattermost/server/cmd/mattermost/commands
    
    the code of the file until where you have to start completion: // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

package commands

import (
	"bytes"
	"encoding/json"
	"fmt"
	"strconv"
	"strings"

	"github.com/pkg/errors"
	"github.com/spf13/cobra"

	"github.com/mattermost/mattermost/server/public/model"
	"github.com/mattermost/mattermost/server/public/shared/mlog"
	"github.com/mattermost/mattermost/server/v8/channels/store/sqlstore"
	"github.com/mattermost/mattermost/server/v8/config"
	"github.com/mattermost/matt
    
func migrateCmdF(command *cobra.Command, args []string) error {
	logger := mlog.CreateConsoleLogger()
	defer logger.Shutdown()

	cfgDSN := getConfigDSN(command, config.GetEnvironment())
	recoverFlag, _ := command.Flags().GetBool("auto-recover")
	savePlan, _ := command.Flags().GetBool("save-plan")
	dryRun, _ := command.Flags().GetBool("dry-run")
	cfgStore, err := config.NewStoreFromDSN(cfgDSN, true, nil, true)
	if err != nil {
		return errors.Wrap(err, "failed to load configuration")
	}
	config := cfgStore.Get()

	migrator, err := sqlstore.NewMigrator(config.SqlSettings, logger, dryRun)
	if err != nil {
		return errors.Wrap(err, "failed to create migrator")
	}
	defer migrator.Close()

	plan, err := migrator.GeneratePlan(recoverFlag)
	if err != nil {
		return errors.Wrap(err, "failed to generate migration plan")
	}

	if len(plan.Migrations) == 0 {
		CommandPrettyPrintln("No migrations to apply.")
		return nil
	}

	if savePlan || recoverFlag {
		backend, err2 := filestore.NewFileBackend(ConfigToFileBackendSettings(&config.FileSettings, false, true))
		if err2 != nil {
			return fmt.Errorf("failed to initialize filebackend: %w", err2)
		}

		b, mErr := json.MarshalIndent(plan, "", "  ")
		if mErr != nil {
			return fmt.Errorf("failed to marshal plan: %w", mErr)
		}

		fileName, err2 := migrator.GetFileName(plan)
		if err2 != nil {
			return fmt.Errorf("failed to generate plan file: %w", err2)
		}

		_, err = backend.WriteFile(bytes.NewReader(b), fileName+".json")
		if err != nil {
			return fmt.Errorf("failed to write migration plan: %w", err)
		}

		CommandPrettyPrintln(
			fmt.Sprintf("%s\nThe migration plan has been saved. File: %q.\nNote that "+
				" migration plan is saved into file store, so the filepath will be relative to root of file store\n%s",
				strings.Repeat("*", 80), fileName+".json", strings.Repeat("*", 80)))
	}

	err = migrator.MigrateWithPlan(plan, dryRun)
	if err != nil {
		return errors.Wrap(err, "failed to migrate with the plan")
	}

	CommandPrettyPrintln("Database successfully migrated")

	return nil
}