config: support count meta-parameter

config/config.go

@@ -31,6 +31,7 @@ type ProviderConfig struct {
 type Resource struct {
 	Name      string
 	Type      string
+	Count     int
 	RawConfig *RawConfig
 }
 

config/loader_libucl.go

@@ -253,6 +253,9 @@ func loadResourcesLibucl(o *libucl.Object) ([]*Resource, error) {
 					err)
 			}
 
+			// Remove the "count" from the config, since we treat that special
+			delete(config, "count")
+
 			rawConfig, err := NewRawConfig(config)
 			if err != nil {
 				return nil, fmt.Errorf(
@@ -262,9 +265,24 @@ func loadResourcesLibucl(o *libucl.Object) ([]*Resource, error) {
 					err)
 			}
 
+			// If we have a count, then figure it out
+			var count int = 1
+			if o := r.Get("count"); o != nil {
+				err = o.Decode(&count)
+				o.Close()
+				if err != nil {
+					return nil, fmt.Errorf(
+						"Error parsing count for %s[%s]: %s",
+						t.Key(),
+						r.Key(),
+						err)
+				}
+			}
+
 			result = append(result, &Resource{
 				Name:      r.Key(),
 				Type:      t.Key(),
+				Count:     count,
 				RawConfig: rawConfig,
 			})
 		}

config/loader_test.go

@@ -145,9 +145,10 @@ func resourcesStr(rs []*Resource) string {
 	result := ""
 	for _, r := range rs {
 		result += fmt.Sprintf(
-			"%s[%s]\n",
+			"%s[%s] (x%d)\n",
 			r.Type,
-			r.Name)
+			r.Name,
+			r.Count)
 
 		ks := make([]string, 0, len(r.RawConfig.Raw))
 		for k, _ := range r.RawConfig.Raw {
@@ -229,8 +230,8 @@ do
 `
 
 const basicResourcesStr = `
-aws_security_group[firewall]
-aws_instance[web]
+aws_security_group[firewall] (x5)
+aws_instance[web] (x1)
   ami
   network_interface
   security_groups
@@ -251,8 +252,8 @@ aws
 `
 
 const importResourcesStr = `
-aws_security_group[db]
-aws_security_group[web]
+aws_security_group[db] (x1)
+aws_security_group[web] (x1)
 `
 
 const importVariablesStr = `

config/test-fixtures/basic.tf

@@ -13,6 +13,7 @@ provider "do" {
 }
 
 resource "aws_security_group" "firewall" {
+    count = 5
 }
 
 resource aws_instance "web" {