fix: include subdirectories in example templates (#1715)

examples/examples_test.go

@@ -1,6 +1,10 @@
 package examples_test
 
 import (
+	"archive/tar"
+	"bytes"
+	"errors"
+	"io"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -17,3 +21,24 @@ func TestTemplate(t *testing.T) {
 	_, err = examples.Archive(list[0].ID)
 	require.NoError(t, err)
 }
+
+func TestSubdirs(t *testing.T) {
+	t.Parallel()
+	tarData, err := examples.Archive("docker-image-builds")
+	require.NoError(t, err)
+
+	tarReader := tar.NewReader(bytes.NewReader(tarData))
+	entryPaths := make(map[byte][]string)
+	for {
+		header, err := tarReader.Next()
+		if errors.Is(err, io.EOF) {
+			break
+		}
+		require.NoError(t, err)
+
+		entryPaths[header.Typeflag] = append(entryPaths[header.Typeflag], header.Name)
+	}
+
+	require.Subset(t, entryPaths[tar.TypeDir], []string{"./", "images/"})
+	require.Subset(t, entryPaths[tar.TypeReg], []string{"README.md", "main.tf", "images/base.Dockerfile"})
+}