Fix built-in find_in_parent_folders func (#2869)

* fix: findInParentFolders func

* fix: revert code for the `findInParentFolder` function

config/config_helpers.go

@@ -489,15 +489,11 @@ func findInParentFolders(
 			return "", errors.WithStackTrace(ParentFileNotFound{Path: terragruntOptions.TerragruntConfigPath, File: fileToFindStr, Cause: "Traversed all the way to the root"})
 		}
 
-		fileToFind := currentDir
-
+		fileToFind := GetDefaultConfigPath(currentDir)
 		if fileToFindParam != "" {
 			fileToFind = util.JoinPath(currentDir, fileToFindParam)
 		}
 
-		// if `fileToFind` is dir, append default config filename `terragrunt.hcl`
-		fileToFind = GetDefaultConfigPath(fileToFind)
-
 		if util.FileExists(fileToFind) {
 			return fileToFind, nil
 		}

config/config_helpers_test.go

@@ -291,6 +291,12 @@ func TestFindInParentFolders(t *testing.T) {
 			absPath(t, "../test/fixture-parent-folders/in-another-subfolder/common/foo.txt"),
 			nil,
 		},
+		{
+			[]string{"tfwork"},
+			terragruntOptionsForTest(t, "../test/fixture-parent-folders/with-params/tfwork/tg/"+DefaultTerragruntConfigPath),
+			absPath(t, "../test/fixture-parent-folders/with-params/tfwork"),
+			nil,
+		},
 		{
 			nil,
 			terragruntOptionsForTest(t, "/"),

test/fixture-parent-folders/with-params/tfwork/tg/terragrunt.hcl

@@ -0,0 +1,3 @@
+include "module" {
+  path = "${find_in_parent_folders("tfwork")}/test-var/providers.tf"
+}