config: not directory that config was loaded from

config/config.go

@@ -15,6 +15,11 @@ import (
 // Config is the configuration that comes from loading a collection
 // of Terraform templates.
 type Config struct {
+	// Dir is the path to the directory where this configuration was
+	// loaded from. If it is blank, this configuration wasn't loaded from
+	// any meaningful directory.
+	Dir string
+
 	Modules         []*Module
 	ProviderConfigs []*ProviderConfig
 	Resources       []*Resource

config/loader.go

@@ -140,6 +140,9 @@ func LoadDir(root string) (*Config, error) {
 		}
 	}
 
+	// Mark the directory
+	result.Dir = root
+
 	return result, nil
 }
 

config/loader_test.go

@@ -25,6 +25,10 @@ func TestLoadBasic(t *testing.T) {
 		t.Fatal("config should not be nil")
 	}
 
+	if c.Dir != "" {
+		t.Fatalf("bad: %#v", c.Dir)
+	}
+
 	actual := variablesStr(c.Variables)
 	if actual != strings.TrimSpace(basicVariablesStr) {
 		t.Fatalf("bad:\n%s", actual)
@@ -85,6 +89,10 @@ func TestLoadBasic_json(t *testing.T) {
 		t.Fatal("config should not be nil")
 	}
 
+	if c.Dir != "" {
+		t.Fatalf("bad: %#v", c.Dir)
+	}
+
 	actual := variablesStr(c.Variables)
 	if actual != strings.TrimSpace(basicVariablesStr) {
 		t.Fatalf("bad:\n%s", actual)
@@ -116,6 +124,10 @@ func TestLoadBasic_modules(t *testing.T) {
 		t.Fatal("config should not be nil")
 	}
 
+	if c.Dir != "" {
+		t.Fatalf("bad: %#v", c.Dir)
+	}
+
 	actual := modulesStr(c.Modules)
 	if actual != strings.TrimSpace(modulesModulesStr) {
 		t.Fatalf("bad:\n%s", actual)
@@ -131,6 +143,10 @@ func TestLoad_variables(t *testing.T) {
 		t.Fatal("config should not be nil")
 	}
 
+	if c.Dir != "" {
+		t.Fatalf("bad: %#v", c.Dir)
+	}
+
 	actual := variablesStr(c.Variables)
 	if actual != strings.TrimSpace(variablesVariablesStr) {
 		t.Fatalf("bad:\n%s", actual)
@@ -138,7 +154,8 @@ func TestLoad_variables(t *testing.T) {
 }
 
 func TestLoadDir_basic(t *testing.T) {
-	c, err := LoadDir(filepath.Join(fixtureDir, "dir-basic"))
+	dir := filepath.Join(fixtureDir, "dir-basic")
+	c, err := LoadDir(dir)
 	if err != nil {
 		t.Fatalf("err: %s", err)
 	}
@@ -147,6 +164,10 @@ func TestLoadDir_basic(t *testing.T) {
 		t.Fatal("config should not be nil")
 	}
 
+	if c.Dir != dir {
+		t.Fatalf("bad: %#v", c.Dir)
+	}
+
 	actual := variablesStr(c.Variables)
 	if actual != strings.TrimSpace(dirBasicVariablesStr) {
 		t.Fatalf("bad:\n%s", actual)