migrate

type Logger interface {
	Printf(string, ...interface{})
	Println(...interface{})
}

type Migrate struct {
	Migrations []Migration
	Files      []os.FileInfo
	// contains filtered or unexported fields
}

type Migration struct {
	Filename string
	Checksum string
	Content  string
}

type StdLogger struct{}

type Store interface {
	Open() error
	Exec(string, ...interface{}) (sql.Result, error)

	// CreateMetaversionIfNotExists and report the current version.
	CreateMetaVersionIfNotExists() (int, error)
	CreateMetaIfNotExists() error
	CreateMetaCheckpointsIfNotExists() error

	GetMigrations() ([]Migration, error)
	InsertMigration(filename, content, checksum string) error
	UpsertMigration(filename, content, checksum string) error

	GetMetaCheckpoints(string) ([]string, error)
	InsertMetaCheckpoint(filename, content, checksum string, idx int) error
	DeleteMetaCheckpoints() error

	UpgradeToV1([]Migration) error
}