From 0a0b4f1583e07f80fe59257187630b1bd980f700 Mon Sep 17 00:00:00 2001
From: Joe Kutner <jpkutner@gmail.com>
Date: Tue, 25 Aug 2020 16:49:48 -0500
Subject: [PATCH] Add func to append to ignorelist. This allows those using
 Kaniko as a library to add ignored dirs and files without needs to modify
 /proc/self/mountinfo or doing other strange things with mount -t tmpfs

---
 pkg/util/fs_util.go      |  4 ++++
 pkg/util/fs_util_test.go | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/pkg/util/fs_util.go b/pkg/util/fs_util.go
index 88348bfec3..694e3e7390 100644
--- a/pkg/util/fs_util.go
+++ b/pkg/util/fs_util.go
@@ -90,6 +90,10 @@ func IgnoreList() []IgnoreListEntry {
 	return ignorelist
 }
 
+func AddToIgnoreList(entry IgnoreListEntry) {
+	ignorelist = append(ignorelist, entry)
+}
+
 func IncludeWhiteout() FSOpt {
 	return func(opts *FSConfig) {
 		opts.includeWhiteout = true
diff --git a/pkg/util/fs_util_test.go b/pkg/util/fs_util_test.go
index df49581424..5901c484a0 100644
--- a/pkg/util/fs_util_test.go
+++ b/pkg/util/fs_util_test.go
@@ -78,6 +78,17 @@ func Test_DetectFilesystemSkiplist(t *testing.T) {
 	testutil.CheckErrorAndDeepEqual(t, false, err, expectedSkiplist, actualSkiplist)
 }
 
+func Test_AddToIgnoreList(t *testing.T) {
+	AddToIgnoreList(IgnoreListEntry{
+		Path:            "/tmp",
+		PrefixMatchOnly: false,
+	})
+
+	if !CheckIgnoreList("/tmp") {
+		t.Errorf("CheckIgnoreList() = %v, want %v", false, true)
+	}
+}
+
 var tests = []struct {
 	files         map[string]string
 	directory     string