move IsEmptyDir to configs package

command/init.go

@@ -15,7 +15,6 @@ import (
 	"github.com/hashicorp/errwrap"
 	"github.com/hashicorp/terraform/backend"
 	backendInit "github.com/hashicorp/terraform/backend/init"
-	"github.com/hashicorp/terraform/config"
 	"github.com/hashicorp/terraform/configs"
 	"github.com/hashicorp/terraform/configs/configschema"
 	"github.com/hashicorp/terraform/configs/configupgrade"
@@ -125,7 +124,7 @@ func (c *InitCommand) Run(args []string) int {
 	if flagFromModule != "" {
 		src := flagFromModule
 
-		empty, err := config.IsEmptyDir(path)
+		empty, err := configs.IsEmptyDir(path)
 		if err != nil {
 			c.Ui.Error(fmt.Sprintf("Error validating destination directory: %s", err))
 			return 1
@@ -157,7 +156,7 @@ func (c *InitCommand) Run(args []string) int {
 
 	// If our directory is empty, then we're done. We can't get or setup
 	// the backend with an empty directory.
-	empty, err := config.IsEmptyDir(path)
+	empty, err := configs.IsEmptyDir(path)
 	if err != nil {
 		diags = diags.Append(fmt.Errorf("Error checking configuration: %s", err))
 		return 1

command/providers.go

@@ -5,7 +5,7 @@ import (
 	"path/filepath"
 	"sort"
 
-	"github.com/hashicorp/terraform/config"
+	"github.com/hashicorp/terraform/configs"
 	"github.com/hashicorp/terraform/moduledeps"
 	"github.com/hashicorp/terraform/terraform"
 	"github.com/hashicorp/terraform/tfdiags"
@@ -46,7 +46,7 @@ func (c *ProvidersCommand) Run(args []string) int {
 
 	var diags tfdiags.Diagnostics
 
-	empty, err := config.IsEmptyDir(configPath)
+	empty, err := configs.IsEmptyDir(configPath)
 	if err != nil {
 		diags = diags.Append(tfdiags.Sourceless(
 			tfdiags.Error,

config/loader.go

@@ -135,21 +135,6 @@ func LoadDir(root string) (*Config, error) {
 	return result, nil
 }
 
-// IsEmptyDir returns true if the directory given has no Terraform
-// configuration files.
-func IsEmptyDir(root string) (bool, error) {
-	if _, err := os.Stat(root); err != nil && os.IsNotExist(err) {
-		return true, nil
-	}
-
-	fs, os, err := dirFiles(root)
-	if err != nil {
-		return false, err
-	}
-
-	return len(fs) == 0 && len(os) == 0, nil
-}
-
 // Ext returns the Terraform configuration extension of the given
 // path, or a blank string if it is an invalid function.
 func ext(path string) string {

config/loader_test.go

@@ -12,36 +12,6 @@ func TestErrNoConfigsFound_impl(t *testing.T) {
 	var _ error = new(ErrNoConfigsFound)
 }
 
-func TestIsEmptyDir(t *testing.T) {
-	val, err := IsEmptyDir(fixtureDir)
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-	if val {
-		t.Fatal("should not be empty")
-	}
-}
-
-func TestIsEmptyDir_noExist(t *testing.T) {
-	val, err := IsEmptyDir(filepath.Join(fixtureDir, "nopenopenope"))
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-	if !val {
-		t.Fatal("should be empty")
-	}
-}
-
-func TestIsEmptyDir_noConfigs(t *testing.T) {
-	val, err := IsEmptyDir(filepath.Join(fixtureDir, "dir-empty"))
-	if err != nil {
-		t.Fatalf("err: %s", err)
-	}
-	if !val {
-		t.Fatal("should be empty")
-	}
-}
-
 func TestLoadFile_badType(t *testing.T) {
 	_, err := LoadFile(filepath.Join(fixtureDir, "bad_type.tf.nope"))
 	if err == nil {

configs/parser_config_dir.go

@@ -2,6 +2,7 @@ package configs
 
 import (
 	"fmt"
+	"os"
 	"path/filepath"
 	"strings"
 
@@ -140,3 +141,23 @@ func IsIgnoredFile(name string) bool {
 		strings.HasSuffix(name, "~") || // vim
 		strings.HasPrefix(name, "#") && strings.HasSuffix(name, "#") // emacs
 }
+
+// IsEmptyDir returns true if the given filesystem path contains no Terraform
+// configuration files.
+//
+// Unlike the methods of the Parser type, this function always consults the
+// real filesystem, and thus it isn't appropriate to use when working with
+// configuration loaded from a plan file.
+func IsEmptyDir(path string) (bool, error) {
+	if _, err := os.Stat(path); err != nil && os.IsNotExist(err) {
+		return true, nil
+	}
+
+	p := NewParser(nil)
+	fs, os, err := p.dirFiles(path)
+	if err != nil {
+		return false, err
+	}
+
+	return len(fs) == 0 && len(os) == 0, nil
+}

configs/parser_config_dir_test.go

@@ -138,3 +138,33 @@ func TestParserLoadConfigDirFailure(t *testing.T) {
 	}
 
 }
+
+func TestIsEmptyDir(t *testing.T) {
+	val, err := IsEmptyDir(filepath.Join("testdata", "valid-files"))
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if val {
+		t.Fatal("should not be empty")
+	}
+}
+
+func TestIsEmptyDir_noExist(t *testing.T) {
+	val, err := IsEmptyDir(filepath.Join("testdata", "nopenopenope"))
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if !val {
+		t.Fatal("should be empty")
+	}
+}
+
+func TestIsEmptyDir_noConfigs(t *testing.T) {
+	val, err := IsEmptyDir(filepath.Join("testdata", "dir-empty"))
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if !val {
+		t.Fatal("should be empty")
+	}
+}