EntityFramework Core MySQL Script-Migration export customization

EF core implementation is similar with some difference in overriding Generate method, here is the implementation for CustomMySqlMigrationSqlGenerator:

using System.Collections.Generic;
using Microsoft.EntityFrameworkCore.Metadata;
using Pomelo.EntityFrameworkCore.MySql.Infrastructure.Internal;
using Microsoft.EntityFrameworkCore.Migrations;
using Microsoft.EntityFrameworkCore.Migrations.Operations;
using Microsoft.EntityFrameworkCore.Storage;
namespace test
{
/// <summary>
/// Custom MigrationSqlGenerator to add semi-colons to the end of 
/// all migration statements.
/// </summary>
public class CustomMySqlMigrationSqlGenerator : MySqlMigrationsSqlGenerator
{
    private readonly MigrationsSqlGeneratorDependencies _dependencies;

    public CustomMySqlMigrationSqlGenerator(MigrationsSqlGeneratorDependencies dependencies, 
        IMigrationsAnnotationProvider migrationsAnnotations, 
        IMySqlOptions options): base(dependencies, migrationsAnnotations, options)
    {
        _dependencies = dependencies;
    }

    public override IReadOnlyList<MigrationCommand> Generate(IReadOnlyList<MigrationOperation> operations, IModel model = null)
    {
        List<MigrationCommand> result = new List<MigrationCommand>();
        IEnumerable<MigrationCommand> statements = base.Generate(operations, model);
        foreach (MigrationCommand statement in statements)
        {
            var factory = _dependencies.CommandBuilderFactory.Create();
            factory.Append((statement.CommandText.TrimEnd() + ";").Replace(";;", ";"));
            result.Add(new MigrationCommand(factory.Build(), statement.TransactionSuppressed));
        }
        return result;
    }
  }
}

Also you need to set the configuration in your DbContext:

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.ReplaceService<IMigrationsSqlGenerator, CustomMySqlMigrationSqlGenerator>();
    }