From eb38aaaeeeeeddbd59ef8bc895ad098fe69b428f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carlos=20Mart=C3=ADn=20Nieto?= <carlosmn@github.com>
Date: Fri, 4 Jan 2019 00:43:48 +0000
Subject: [PATCH] Merge pull request #463 from Nivl/patch-1

Add index.Clear() to clear the index object

(cherry picked from commit c27981c283b5e02fcbbf17cce0a3e6da9339986c)
---
 index.go | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/index.go b/index.go
index 5106516..dd13460 100644
--- a/index.go
+++ b/index.go
@@ -145,6 +145,20 @@ func (v *Index) Path() string {
 	return ret
 }
 
+// Clear clears the index object in memory; changes must be explicitly
+// written to disk for them to take effect persistently
+func (v *Index) Clear() error {
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	err := C.git_index_clear(v.ptr)
+	runtime.KeepAlive(v)
+	if err < 0 {
+		return MakeGitError(err)
+	}
+	return nil
+}
+
 // Add adds or replaces the given entry to the index, making a copy of
 // the data
 func (v *Index) Add(entry *IndexEntry) error {