func migrateUp(service versioning.IMaintainVersions,
migratables []files.MigrationFile) error {
stack := &Stack{}
incrementalInterval := time.Duration(int64(0))
for _, m := range migratables {
script := Script{Version: m.Version, Stmts: m.Down}
stack.Push(script)
fmt.Printf("Upgrading to version: %d \n", m.Version)
err := service.ApplyChanges(m.Up)
if err != nil {
revertUpgrades(stack, service)
return err
}
aon := time.Now().Add(incrementalInterval)
ad := service.AddVersion(m.Version, m.Description, aon)
if ad != nil {
revertUpgrades(stack, service)
return ad
}
incrementalInterval += time.Second //prevents it from having the same time, which throws the cluster sort
}
return nil
}
func migrateDown(n Script, service versioning.IMaintainVersions) error {
fmt.Printf("Downgrading from version: %d \n", n.Version)
if err := service.ApplyChanges(n.Stmts); err != nil {
return err
}
if err := service.RemoveVersion(n.Version); err != nil {
return err
}
return nil
}