From fd80bb526e7331044d4d206b0784fc88f78f309a Mon Sep 17 00:00:00 2001
From: Ettore Di Giacinto <mudler@gentoo.org>
Date: Tue, 9 Feb 2021 16:51:03 +0100
Subject: [PATCH] Add DirectoryIsEmpty

---
 pkg/helpers/file.go      | 15 +++++++++++++++
 pkg/helpers/file_test.go | 17 +++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/pkg/helpers/file.go b/pkg/helpers/file.go
index deece2ec..81f8e8b9 100644
--- a/pkg/helpers/file.go
+++ b/pkg/helpers/file.go
@@ -16,6 +16,7 @@
 package helpers
 
 import (
+	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -82,6 +83,20 @@ func ListDir(dir string) ([]string, error) {
 	return content, err
 }
 
+// DirectoryIsEmpty Checks wether the directory is empty or not
+func DirectoryIsEmpty(dir string) (bool, error) {
+	f, err := os.Open(dir)
+	if err != nil {
+		return false, err
+	}
+	defer f.Close()
+
+	if _, err = f.Readdirnames(1); err == io.EOF {
+		return true, nil
+	}
+	return false, nil
+}
+
 // Touch creates an empty file
 func Touch(f string) error {
 	_, err := os.Stat(f)
diff --git a/pkg/helpers/file_test.go b/pkg/helpers/file_test.go
index e8d08aef..8e3366c5 100644
--- a/pkg/helpers/file_test.go
+++ b/pkg/helpers/file_test.go
@@ -33,6 +33,23 @@ var _ = Describe("Helpers", func() {
 		})
 	})
 
+	Context("DirectoryIsEmpty", func() {
+		It("Detects empty directory", func() {
+			testDir, err := ioutil.TempDir(os.TempDir(), "test")
+			Expect(err).ToNot(HaveOccurred())
+			defer os.RemoveAll(testDir)
+			Expect(DirectoryIsEmpty(testDir)).To(BeTrue())
+		})
+		It("Detects directory with files", func() {
+			testDir, err := ioutil.TempDir(os.TempDir(), "test")
+			Expect(err).ToNot(HaveOccurred())
+			defer os.RemoveAll(testDir)
+			err = Touch(filepath.Join(testDir, "foo"))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(DirectoryIsEmpty(testDir)).To(BeFalse())
+		})
+	})
+
 	Context("Orders dir and files correctly", func() {
 		It("puts files first and folders at end", func() {
 			testDir, err := ioutil.TempDir(os.TempDir(), "test")