func (v *Validator) Validate(
c *terraform.ResourceConfig) (ws []string, es []error) {
// Flatten the configuration so it is easier to reason about
flat := flatmap.Flatten(c.Raw)
keySet := make(map[string]validatorKey)
for i, vs := range [][]string{v.Required, v.Optional} {
req := i == 0
for _, k := range vs {
vk, err := newValidatorKey(k, req)
if err != nil {
es = append(es, err)
continue
}
keySet[k] = vk
}
}
purged := make([]string, 0)
for _, kv := range keySet {
p, w, e := kv.Validate(flat)
if len(w) > 0 {
ws = append(ws, w...)
}
if len(e) > 0 {
es = append(es, e...)
}
purged = append(purged, p...)
}
// Delete all the keys we processed in order to find
// the unknown keys.
for _, p := range purged {
delete(flat, p)
}
// The rest are unknown
for k, _ := range flat {
es = append(es, fmt.Errorf("Unknown configuration: %s", k))
}
return
}
// DefaultsMap returns a map of default values for this variable.
func (v *Variable) DefaultsMap() map[string]string {
if v.Default == nil {
return nil
}
n := fmt.Sprintf("var.%s", v.Name)
switch v.Type() {
case VariableTypeString:
return map[string]string{n: v.Default.(string)}
case VariableTypeMap:
result := flatmap.Flatten(map[string]interface{}{
n: v.Default.(map[string]string),
})
result[n] = v.Name
return result
default:
return nil
}
}
// Diff returns the ResourceDiff for a resource given its state and
// configuration.
func (b *ResourceBuilder) Diff(
s *terraform.InstanceState,
c *terraform.ResourceConfig) (*terraform.InstanceDiff, error) {
attrs := make(map[string]*terraform.ResourceAttrDiff)
// We require a new resource if the ID is empty. Or, later, we set
// this to true if any configuration changed that triggers a new resource.
requiresNew := s.ID == ""
// Flatten the raw and processed configuration
flatRaw := flatmap.Flatten(c.Raw)
flatConfig := flatmap.Flatten(c.Config)
for ak, at := range b.Attrs {
// Keep track of all the keys we saw in the raw structure
// so that we can prune our attributes later.
seenKeys := make([]string, 0)
// Go through and find the added/changed keys in flatRaw
for k, v := range flatRaw {
// Find only the attributes that match our prefix
if !strings.HasPrefix(k, ak) {
continue
}
// Track that we saw this key
seenKeys = append(seenKeys, k)
// We keep track of this in case we have a pre-processor
// so that we can store the original value still.
originalV := v
// If this key is in the cleaned config, then use that value
// because it'll have its variables properly interpolated
if cleanV, ok := flatConfig[k]; ok {
v = cleanV
originalV = v
// If we have a pre-processor for this, run it.
if pp, ok := b.PreProcess[k]; ok {
v = pp(v)
}
}
oldV, ok := s.Attributes[k]
// If there is an old value and they're the same, no change
if ok && oldV == v {
continue
}
// Record the change
attrs[k] = &terraform.ResourceAttrDiff{
Old: oldV,
New: v,
NewExtra: originalV,
Type: terraform.DiffAttrInput,
}
// If this requires a new resource, record that and flag our
// boolean.
if at == AttrTypeCreate {
attrs[k].RequiresNew = true
requiresNew = true
}
}
// Find all the keys that are in our attributes right now that
// we also care about.
matchingKeys := make(map[string]struct{})
for k, _ := range s.Attributes {
// Find only the attributes that match our prefix
if !strings.HasPrefix(k, ak) {
continue
}
// If this key is computed, then we don't ever delete it
comp := false
for _, ck := range b.ComputedAttrs {
if ck == k {
comp = true
break
}
// If the key is prefixed with the computed key, don't
// mark it for delete, ever.
if strings.HasPrefix(k, ck+".") {
comp = true
break
}
}
if comp {
continue
}
matchingKeys[k] = struct{}{}
}
// Delete the keys we saw in the configuration from the keys
// that are currently set.
for _, k := range seenKeys {
delete(matchingKeys, k)
}
for k, _ := range matchingKeys {
attrs[k] = &terraform.ResourceAttrDiff{
Old: s.Attributes[k],
NewRemoved: true,
Type: terraform.DiffAttrInput,
}
}
}
// If we require a new resource, then process all the attributes
// that will be changing due to the creation of the resource.
if requiresNew {
for _, k := range b.ComputedAttrs {
if _, ok := attrs[k]; ok {
continue
}
old := s.Attributes[k]
attrs[k] = &terraform.ResourceAttrDiff{
Old: old,
NewComputed: true,
Type: terraform.DiffAttrOutput,
}
}
}
// If we're changing anything, then mark the updated
// attributes.
if len(attrs) > 0 {
for _, k := range b.ComputedAttrsUpdate {
if _, ok := attrs[k]; ok {
continue
}
old := s.Attributes[k]
attrs[k] = &terraform.ResourceAttrDiff{
Old: old,
NewComputed: true,
Type: terraform.DiffAttrOutput,
}
}
}
// Build our resulting diff if we had attributes change
var result *terraform.InstanceDiff
if len(attrs) > 0 {
result = &terraform.InstanceDiff{
Attributes: attrs,
}
}
return result, nil
}