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

   1 package terraform
   2
   3 import (
   4         "fmt"
   5
   6         "github.com/hashicorp/terraform/providers"
   7         "github.com/hashicorp/terraform/provisioners"
   8 )
   9
  10 // contextComponentFactory is the interface that Context uses
  11 // to initialize various components such as providers and provisioners.
  12 // This factory gets more information than the raw maps using to initialize
  13 // a Context. This information is used for debugging.
  14 type contextComponentFactory interface {
  15         // ResourceProvider creates a new ResourceProvider with the given
  16         // type. The "uid" is a unique identifier for this provider being
  17         // initialized that can be used for internal tracking.
  18         ResourceProvider(typ, uid string) (providers.Interface, error)
  19         ResourceProviders() []string
  20
  21         // ResourceProvisioner creates a new ResourceProvisioner with the
  22         // given type. The "uid" is a unique identifier for this provisioner
  23         // being initialized that can be used for internal tracking.
  24         ResourceProvisioner(typ, uid string) (provisioners.Interface, error)
  25         ResourceProvisioners() []string
  26 }
  27
  28 // basicComponentFactory just calls a factory from a map directly.
  29 type basicComponentFactory struct {
  30         providers    map[string]providers.Factory
  31         provisioners map[string]ProvisionerFactory
  32 }
  33
  34 func (c *basicComponentFactory) ResourceProviders() []string {
  35         result := make([]string, len(c.providers))
  36         for k := range c.providers {
  37                 result = append(result, k)
  38         }
  39
  40         return result
  41 }
  42
  43 func (c *basicComponentFactory) ResourceProvisioners() []string {
  44         result := make([]string, len(c.provisioners))
  45         for k := range c.provisioners {
  46                 result = append(result, k)
  47         }
  48
  49         return result
  50 }
  51
  52 func (c *basicComponentFactory) ResourceProvider(typ, uid string) (providers.Interface, error) {
  53         f, ok := c.providers[typ]
  54         if !ok {
  55                 return nil, fmt.Errorf("unknown provider %q", typ)
  56         }
  57
  58         return f()
  59 }
  60
  61 func (c *basicComponentFactory) ResourceProvisioner(typ, uid string) (provisioners.Interface, error) {
  62         f, ok := c.provisioners[typ]
  63         if !ok {
  64                 return nil, fmt.Errorf("unknown provisioner %q", typ)
  65         }
  66
  67         return f()
  68 }