// Init sets up expected paths.
func (s *Store) Init() (*Store, error) {
sp, err := s.GetSnapshot().FastForward()
if err != nil {
return nil, err
}
exists, _, err := sp.Exists(nextPortPath)
if err != nil {
return nil, err
}
if !exists {
sp, err = sp.Set(nextPortPath, strconv.Itoa(startPort))
if err != nil {
return nil, err
}
}
v, err := cp.VerifySchema(SchemaVersion, sp)
if cp.IsErrNoEnt(err) {
sp, err = cp.SetSchemaVersion(SchemaVersion, sp)
if err != nil {
return nil, err
}
} else if err != nil {
if cp.IsErrSchemaMism(err) {
err = fmt.Errorf("%s (%d != %d)", err, SchemaVersion, v)
}
return nil, err
}
s.snapshot = sp
return s, nil
}
// SetSchemaVersion is used to update the store schema which is used for
// validation.
func (s *Store) SetSchemaVersion(version int) error {
sp, err := s.GetSnapshot().FastForward()
if err != nil {
return err
}
_, err = cp.SetSchemaVersion(version, sp)
if err != nil {
return err
}
return nil
}