fix realPath for first nested archives

Signed-off-by: Kudryavcev Nikolay <kydry.nikolau@gmail.com>

test/cli/archive_test.go

@@ -10,6 +10,8 @@ import (
 )
 
 func TestArchiveScan(t *testing.T) {
+	archive := createArchive(t, "test-fixtures/archive", t.TempDir())
+	nestedArchive := createArchive(t, filepath.Dir(archive), t.TempDir())
 	tests := []struct {
 		name           string
 		args           []string
@@ -23,7 +25,21 @@ func TestArchiveScan(t *testing.T) {
 				"scan",
 				"-o",
 				"json",
-				"file:" + createArchive(t, "test-fixtures/archive", t.TempDir()),
+				"file:" + archive,
+			},
+			assertions: []traitAssertion{
+				assertSuccessfulReturnCode,
+				assertJsonReport,
+				assertPackageCount(1),
+			},
+		},
+		{
+			name: "scan an nested archive within the temp dir",
+			args: []string{
+				"scan",
+				"-o",
+				"json",
+				"file:" + nestedArchive,
 			},
 			assertions: []traitAssertion{
 				assertSuccessfulReturnCode,