vendor/github.com/hashicorp/terraform/terraform/node_resource_abstract_count.go

   1 package terraform
   2
   3 // NodeAbstractCountResource should be embedded instead of NodeAbstractResource
   4 // if the resource has a `count` value that needs to be expanded.
   5 //
   6 // The embedder should implement `DynamicExpand` to process the count.
   7 type NodeAbstractCountResource struct {
   8         *NodeAbstractResource
   9
  10         // Validate, if true, will perform the validation for the count.
  11         // This should only be turned on for the "validate" operation.
  12         Validate bool
  13 }
  14
  15 // GraphNodeEvalable
  16 func (n *NodeAbstractCountResource) EvalTree() EvalNode {
  17         // We only check if the count is computed if we're not validating.
  18         // If we're validating we allow computed counts since they just turn
  19         // into more computed values.
  20         var evalCountCheckComputed EvalNode
  21         if !n.Validate {
  22                 evalCountCheckComputed = &EvalCountCheckComputed{Resource: n.Config}
  23         }
  24
  25         return &EvalSequence{
  26                 Nodes: []EvalNode{
  27                         // The EvalTree for a plannable resource primarily involves
  28                         // interpolating the count since it can contain variables
  29                         // we only just received access to.
  30                         //
  31                         // With the interpolated count, we can then DynamicExpand
  32                         // into the proper number of instances.
  33                         &EvalInterpolate{Config: n.Config.RawCount},
  34
  35                         // Check if the count is computed
  36                         evalCountCheckComputed,
  37
  38                         // If validation is enabled, perform the validation
  39                         &EvalIf{
  40                                 If: func(ctx EvalContext) (bool, error) {
  41                                         return n.Validate, nil
  42                                 },
  43
  44                                 Then: &EvalValidateCount{Resource: n.Config},
  45                         },
  46
  47                         &EvalCountFixZeroOneBoundary{Resource: n.Config},
  48                 },
  49         }
  50 }