From a10fbf16ea3296eccad201f642a861b8839730d3 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Mon, 30 Nov 2020 11:52:25 +0000
Subject: [PATCH] fs/cache: add ClearConfig method to clear all remotes based
 on Config #4811

---
 fs/cache/cache.go      |  7 +++++++
 fs/cache/cache_test.go | 16 ++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/fs/cache/cache.go b/fs/cache/cache.go
index 961dd3c7d..e86bd0ec8 100644
--- a/fs/cache/cache.go
+++ b/fs/cache/cache.go
@@ -124,6 +124,13 @@ func Put(fsString string, f fs.Fs) {
 	addMapping(fsString, canonicalName)
 }
 
+// ClearConfig deletes all entries which were based on the config name passed in
+//
+// Returns number of entries deleted
+func ClearConfig(name string) (deleted int) {
+	return c.DeletePrefix(name + ":")
+}
+
 // Clear removes everything from the cache
 func Clear() {
 	c.Clear()
diff --git a/fs/cache/cache_test.go b/fs/cache/cache_test.go
index 8f35ebd89..c23739588 100644
--- a/fs/cache/cache_test.go
+++ b/fs/cache/cache_test.go
@@ -166,6 +166,22 @@ func TestPin(t *testing.T) {
 	Unpin(f2)
 }
 
+func TestClearConfig(t *testing.T) {
+	cleanup, create := mockNewFs(t)
+	defer cleanup()
+
+	assert.Equal(t, 0, c.Entries())
+
+	_, err := GetFn(context.Background(), "mock:/file.txt", create)
+	require.Equal(t, fs.ErrorIsFile, err)
+
+	assert.Equal(t, 2, Entries()) // file + parent
+
+	assert.Equal(t, 2, ClearConfig("mock"))
+
+	assert.Equal(t, 0, Entries())
+}
+
 func TestClear(t *testing.T) {
 	cleanup, create := mockNewFs(t)
 	defer cleanup()