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

   1 package terraform
   2
   3 import (
   4         "github.com/hashicorp/terraform/config/module"
   5 )
   6
   7 // RootVariableTransformer is a GraphTransformer that adds all the root
   8 // variables to the graph.
   9 //
  10 // Root variables are currently no-ops but they must be added to the
  11 // graph since downstream things that depend on them must be able to
  12 // reach them.
  13 type RootVariableTransformer struct {
  14         Module *module.Tree
  15 }
  16
  17 func (t *RootVariableTransformer) Transform(g *Graph) error {
  18         // If no config, no variables
  19         if t.Module == nil {
  20                 return nil
  21         }
  22
  23         // If we have no vars, we're done!
  24         vars := t.Module.Config().Variables
  25         if len(vars) == 0 {
  26                 return nil
  27         }
  28
  29         // Add all variables here
  30         for _, v := range vars {
  31                 node := &NodeRootVariable{
  32                         Config: v,
  33                 }
  34
  35                 // Add it!
  36                 g.Add(node)
  37         }
  38
  39         return nil
  40 }