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

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