cmd/inspect: Add namespace for data file at root

Earlier we used an empty namespace for data file located
at bundle root. This change now uses "data" as the
namespace for a data file at root.

Fixes: #4022

Signed-off-by: Ashutosh Narkar <anarkar4387@gmail.com>

internal/bundle/inspect/inspect.go

@@ -126,7 +126,7 @@ func (bi *Info) getBundleDataWasmAndSignatures(name string) error {
 			path := fmt.Sprintf("%v.%v", ast.DefaultRootDocument, strings.Join(key, "."))
 			bi.Namespaces[path] = append(bi.Namespaces[path], value)
 		} else {
-			bi.Namespaces[""] = append(bi.Namespaces[""], value) // data file at bundle root
+			bi.Namespaces[ast.DefaultRootDocument.String()] = append(bi.Namespaces[ast.DefaultRootDocument.String()], value) // data file at bundle root
 		}
 	}
 

internal/bundle/inspect/inspect_test.go

@@ -48,7 +48,7 @@ func TestGenerateBundleInfoWithFileDir(t *testing.T) {
 		}
 
 		expectedNamespaces := map[string][]string{
-			"":         {filepath.Join(rootDir, "data.json")},
+			"data":     {filepath.Join(rootDir, "data.json")},
 			"data.bar": {filepath.Join(rootDir, "base.rego")},
 			"data.foo": {filepath.Join(rootDir, "baz/authz.rego"), filepath.Join(rootDir, "foo/policy.rego")},
 			"data.fuz": {filepath.Join(rootDir, "fuz/fuz.rego"), filepath.Join(rootDir, "fuz/data.json")},
@@ -114,7 +114,7 @@ func TestGenerateBundleInfoWithFile(t *testing.T) {
 		}
 
 		expectedNamespaces := map[string][]string{
-			"":         {"/data.json"},
+			"data":     {"/data.json"},
 			"data.b.c": {"/policy.rego"},
 		}
 
@@ -181,7 +181,7 @@ func TestGenerateBundleInfoWithBundleTarGz(t *testing.T) {
 
 		expectedNamespaces := map[string][]string{
 			"data.example":                  {"/example/example.rego"},
-			"":                              {"/data.json"},
+			"data":                          {"/data.json"},
 			"data.a.b.c":                    {"/a/b/c/data.json"},
 			"data.a.b.d":                    {"/a/b/d/data.json"},
 			"data.a.b.y":                    {"/a/b/y/foo.rego", "/a/b/y/data.yaml"},