provider/oci.go
func (p *OCIProvider) ApplyChanges(changes *plan.Changes) error {
	log.Debugf("Processing chages: %+v", changes)

	ops := []dns.RecordOperation{}
	ops = append(ops, p.newFilteredRecordOperations(changes.Create, dns.RecordOperationOperationAdd)...)

	ops = append(ops, p.newFilteredRecordOperations(changes.UpdateNew, dns.RecordOperationOperationAdd)...)
	ops = append(ops, p.newFilteredRecordOperations(changes.UpdateOld, dns.RecordOperationOperationRemove)...)

	ops = append(ops, p.newFilteredRecordOperations(changes.Delete, dns.RecordOperationOperationRemove)...)

	if len(ops) == 0 {
		log.Info("All records are already up to date")
		return nil
	}

	ctx := context.Background()
	zones, err := p.zones(ctx)
	if err != nil {
		return errors.Wrap(err, "fetching zones")
	}

	// Separate into per-zone change sets to be passed to OCI API.
	opsByZone := operationsByZone(zones, ops)
	for zoneID, ops := range opsByZone {
		log.Infof("Change zone: %q", zoneID)
		for _, op := range ops {
			log.Info(op)
		}
	}

	if p.dryRun {
		return nil
	}

	for zoneID, ops := range opsByZone {
		if _, err := p.client.PatchZoneRecords(ctx, dns.PatchZoneRecordsRequest{
			CompartmentId:           &p.cfg.CompartmentID,
			ZoneNameOrId:            &zoneID,
			PatchZoneRecordsDetails: dns.PatchZoneRecordsDetails{Items: ops},
		}); err != nil {
			return err
		}
	}

	return nil
}
func (p *OCIProvider) ApplyChanges(changes *plan.Changes) error {
	log.Debugf("Processing chages: %+v", changes)

	ops := []dns.RecordOperation{}
	ops = append(ops, p.newFilteredRecordOperations(changes.Create, dns.RecordOperationOperationAdd)...)

	ops = append(ops, p.newFilteredRecordOperations(changes.UpdateNew, dns.RecordOperationOperationAdd)...)
	ops = append(ops, p.newFilteredRecordOperations(changes.UpdateOld, dns.RecordOperationOperationRemove)...)

	ops = append(ops, p.newFilteredRecordOperations(changes.Delete, dns.RecordOperationOperationRemove)...)

	if len(ops) == 0 {
		log.Info("All records are already up to date")
		return nil
	}

	ctx := context.Background()
	zones, err := p.zones(ctx)
	if err != nil {
		return errors.Wrap(err, "fetching zones")
	}

	// Separate into per-zone change sets to be passed to OCI API.
	opsByZone := operationsByZone(zones, ops)
	for zoneID, ops := range opsByZone {
		log.Infof("Change zone: %q", zoneID)
		for _, op := range ops {
			log.Info(op)
		}
	}

	if p.dryRun {
		return nil
	}

	for zoneID, ops := range opsByZone {
		if _, err := p.client.PatchZoneRecords(ctx, dns.PatchZoneRecordsRequest{
			CompartmentId:           &p.cfg.CompartmentID,
			ZoneNameOrId:            &zoneID,
			PatchZoneRecordsDetails: dns.PatchZoneRecordsDetails{Items: ops},
		}); err != nil {
			return err
		}
	}

	return nil
}
// ApplyChanges applies a given set of changes to a given zone.