Golang InstanceState.Attributes方法代码示例

// State returns the new InstanceState after the diff and any Set
// calls.
func (d *ResourceData) State() *terraform.InstanceState {
	var result terraform.InstanceState
	result.ID = d.Id()

	// If we have no ID, then this resource doesn't exist and we just
	// return nil.
	if result.ID == "" {
		return nil
	}

	// In order to build the final state attributes, we read the full
	// attribute set as a map[string]interface{}, write it to a MapFieldWriter,
	// and then use that map.
	rawMap := make(map[string]interface{})
	for k := range d.schema {
		source := getSourceSet
		if d.partial {
			source = getSourceState
			if _, ok := d.partialMap[k]; ok {
				source = getSourceSet
			}
		}

		raw := d.get([]string{k}, source)
		if raw.Exists && !raw.Computed {
			rawMap[k] = raw.Value
			if raw.ValueProcessed != nil {
				rawMap[k] = raw.ValueProcessed
			}
		}
	}
	mapW := &MapFieldWriter{Schema: d.schema}
	if err := mapW.WriteField(nil, rawMap); err != nil {
		return nil
	}

	result.Attributes = mapW.Map()
	result.Ephemeral.ConnInfo = d.ConnInfo()

	// TODO: This is hacky and we can remove this when we have a proper
	// state writer. We should instead have a proper StateFieldWriter
	// and use that.
	for k, schema := range d.schema {
		if schema.Type != TypeMap {
			continue
		}

		if result.Attributes[k] == "" {
			delete(result.Attributes, k)
		}
	}

	if v := d.Id(); v != "" {
		result.Attributes["id"] = d.Id()
	}

	return &result
}

// Apply performs a create or update depending on the diff, and calls
// the proper function on the matching Resource.
func (m *Map) Apply(
	info *terraform.InstanceInfo,
	s *terraform.InstanceState,
	d *terraform.InstanceDiff,
	meta interface{}) (*terraform.InstanceState, error) {
	r, ok := m.Mapping[info.Type]
	if !ok {
		return nil, fmt.Errorf("Unknown resource type: %s", info.Type)
	}

	if d.Destroy || d.RequiresNew() {
		if s.ID != "" {
			// Destroy the resource if it is created
			err := r.Destroy(s, meta)
			if err != nil {
				return s, err
			}

			s.ID = ""
		}

		// If we're only destroying, and not creating, then return now.
		// Otherwise, we continue so that we can create a new resource.
		if !d.RequiresNew() {
			return nil, nil
		}
	}

	var result *terraform.InstanceState
	var err error
	if s.ID == "" {
		result, err = r.Create(s, d, meta)
	} else {
		if r.Update == nil {
			return s, fmt.Errorf(
				"Resource type '%s' doesn't support update",
				info.Type)
		}

		result, err = r.Update(s, d, meta)
	}
	if result != nil {
		if result.Attributes == nil {
			result.Attributes = make(map[string]string)
		}

		result.Attributes["id"] = result.ID
	}

	return result, err
}