Esempio n. 1
0
func (i *Interpolater) resourceCountKeys(
	ms *ModuleState,
	cr *config.Resource,
	v *config.ResourceVariable) ([]string, error) {
	id := v.ResourceId()

	// If we're NOT applying, then we assume we can read the count
	// from the state. Plan and so on may not have any state yet so
	// we do a full interpolation.
	if i.Operation != walkApply {
		count, err := cr.Count()
		if err != nil {
			return nil, err
		}

		result := make([]string, count)
		for i := 0; i < count; i++ {
			result[i] = fmt.Sprintf("%s.%d", id, i)
		}

		return result, nil
	}

	// We need to determine the list of resource keys to get values from.
	// This needs to be sorted so the order is deterministic. We used to
	// use "cr.Count()" but that doesn't work if the count is interpolated
	// and we can't guarantee that so we instead depend on the state.
	var resourceKeys []string
	for k, _ := range ms.Resources {
		// If we don't have the right prefix then ignore it
		if k != id && !strings.HasPrefix(k, id+".") {
			continue
		}

		// Add it to the list
		resourceKeys = append(resourceKeys, k)
	}
	sort.Strings(resourceKeys)
	return resourceKeys, nil
}
Esempio n. 2
0
func (i *Interpolater) resourceCountMax(
	ms *ModuleState,
	cr *config.Resource,
	v *config.ResourceVariable) (int, error) {
	id := v.ResourceId()

	// If we're NOT applying, then we assume we can read the count
	// from the state. Plan and so on may not have any state yet so
	// we do a full interpolation.
	if i.Operation != walkApply {
		count, err := cr.Count()
		if err != nil {
			return 0, err
		}

		return count, nil
	}

	// We need to determine the list of resource keys to get values from.
	// This needs to be sorted so the order is deterministic. We used to
	// use "cr.Count()" but that doesn't work if the count is interpolated
	// and we can't guarantee that so we instead depend on the state.
	max := -1
	for k, _ := range ms.Resources {
		// Get the index number for this resource
		index := ""
		if k == id {
			// If the key is the id, then its just 0 (no explicit index)
			index = "0"
		} else if strings.HasPrefix(k, id+".") {
			// Grab the index number out of the state
			index = k[len(id+"."):]
			if idx := strings.IndexRune(index, '.'); idx >= 0 {
				index = index[:idx]
			}
		}

		// If there was no index then this resource didn't match
		// the one we're looking for, exit.
		if index == "" {
			continue
		}

		// Turn the index into an int
		raw, err := strconv.ParseInt(index, 0, 0)
		if err != nil {
			return 0, fmt.Errorf(
				"%s: error parsing index %q as int: %s",
				id, index, err)
		}

		// Keep track of this index if its the max
		if new := int(raw); new > max {
			max = new
		}
	}

	// If we never found any matching resources in the state, we
	// have zero.
	if max == -1 {
		return 0, nil
	}

	// The result value is "max+1" because we're returning the
	// max COUNT, not the max INDEX, and we zero-index.
	return max + 1, nil
}
Esempio n. 3
0
func (c *walkContext) computeResourceMultiVariable(
	v *config.ResourceVariable) (string, error) {
	c.Context.sl.RLock()
	defer c.Context.sl.RUnlock()

	// Get the resource from the configuration so we can know how
	// many of the resource there is.
	var cr *config.Resource
	for _, r := range c.Context.module.Config().Resources {
		if r.Id() == v.ResourceId() {
			cr = r
			break
		}
	}
	if cr == nil {
		return "", fmt.Errorf(
			"Resource '%s' not found for variable '%s'",
			v.ResourceId(),
			v.FullKey())
	}

	// Get the relevant module
	// TODO: Not use only root module
	module := c.Context.state.RootModule()

	count, err := cr.Count()
	if err != nil {
		return "", fmt.Errorf(
			"Error reading %s count: %s",
			v.ResourceId(),
			err)
	}

	// If we have no count, return empty
	if count == 0 {
		return "", nil
	}

	var values []string
	for i := 0; i < count; i++ {
		id := fmt.Sprintf("%s.%d", v.ResourceId(), i)

		// If we're dealing with only a single resource, then the
		// ID doesn't have a trailing index.
		if count == 1 {
			id = v.ResourceId()
		}

		r, ok := module.Resources[id]
		if !ok {
			continue
		}

		if r.Primary == nil {
			continue
		}

		attr, ok := r.Primary.Attributes[v.Field]
		if !ok {
			continue
		}

		values = append(values, attr)
	}

	if len(values) == 0 {
		return "", fmt.Errorf(
			"Resource '%s' does not have attribute '%s' "+
				"for variable '%s'",
			v.ResourceId(),
			v.Field,
			v.FullKey())
	}

	return strings.Join(values, config.InterpSplitDelim), nil
}