87 lines
1.9 KiB
Go
87 lines
1.9 KiB
Go
|
package diff
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/hashicorp/terraform/terraform"
|
||
|
|
)
|
||
|
|
|
||
|
|
type Builder struct {
|
||
|
|
Resources map[string]*ResourceBuilder
|
||
|
|
}
|
||
|
|
|
||
|
|
type ResourceBuilder struct {
|
||
|
|
CreateComputedAttrs []string
|
||
|
|
RequiresNewAttrs []string
|
||
|
|
}
|
||
|
|
|
||
|
|
type ResourceBuilderFactory func() *ResourceBuilder
|
||
|
|
|
||
|
|
func (b *ResourceBuilder) Diff(
|
||
|
|
s *terraform.ResourceState,
|
||
|
|
c *terraform.ResourceConfig) (*terraform.ResourceDiff, error) {
|
||
|
|
attrs := make(map[string]*terraform.ResourceAttrDiff)
|
||
|
|
|
||
|
|
requiresNewSet := make(map[string]struct{})
|
||
|
|
for _, k := range b.RequiresNewAttrs {
|
||
|
|
requiresNewSet[k] = struct{}{}
|
||
|
|
}
|
||
|
|
|
||
|
|
// 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 == ""
|
||
|
|
|
||
|
|
// Go through the configuration and find the changed attributes
|
||
|
|
for k, v := range c.Raw {
|
||
|
|
newV := v.(string)
|
||
|
|
|
||
|
|
var oldV string
|
||
|
|
var ok bool
|
||
|
|
if oldV, ok = s.Attributes[k]; ok {
|
||
|
|
// Old value exists! We check to see if there is a change
|
||
|
|
if oldV == newV {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// There has been a change. Record it
|
||
|
|
attrs[k] = &terraform.ResourceAttrDiff{
|
||
|
|
Old: oldV,
|
||
|
|
New: newV,
|
||
|
|
}
|
||
|
|
|
||
|
|
// If this requires a new resource, record that and flag our
|
||
|
|
// boolean.
|
||
|
|
if _, ok := requiresNewSet[k]; ok {
|
||
|
|
attrs[k].RequiresNew = true
|
||
|
|
requiresNew = true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If we require a new resource, then process all the attributes
|
||
|
|
// that will be changing due to the creation of the resource.
|
||
|
|
if requiresNew {
|
||
|
|
attrs["id"] = &terraform.ResourceAttrDiff{
|
||
|
|
Old: s.ID,
|
||
|
|
NewComputed: true,
|
||
|
|
RequiresNew: true,
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, k := range b.CreateComputedAttrs {
|
||
|
|
old := s.Attributes[k]
|
||
|
|
attrs[k] = &terraform.ResourceAttrDiff{
|
||
|
|
Old: old,
|
||
|
|
NewComputed: true,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Build our resulting diff if we had attributes change
|
||
|
|
var result *terraform.ResourceDiff
|
||
|
|
if len(attrs) > 0 {
|
||
|
|
result = &terraform.ResourceDiff{
|
||
|
|
Attributes: attrs,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return result, nil
|
||
|
|
}
|