// Apply performs a create or update depending on the diff, and calls
// the proper function on the matching Resource.
func (m *Map) Apply(
s *terraform.ResourceState,
d *terraform.ResourceDiff,
meta interface{}) (*terraform.ResourceState, error) {
r, ok := m.Mapping[s.Type]
if !ok {
return nil, fmt.Errorf("Unknown resource type: %s", s.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.ResourceState
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",
s.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
}
// State returns the new ResourceState after the diff and any Set
// calls.
func (d *ResourceData) State() *terraform.ResourceState {
var result terraform.ResourceState
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
}
result.Attributes = d.stateObject("", d.schema)
result.ConnInfo = d.ConnInfo()
result.Dependencies = d.Dependencies()
if v := d.Id(); v != "" {
result.Attributes["id"] = d.Id()
}
return &result
}