vault: Adding ClearView method

vault/barrier_view.go

@@ -143,3 +143,20 @@ func CollectKeys(view *BarrierView) ([]string, error) {
 	}
 	return existing, nil
 }
+
+// ClearView is used to delete all the keys in a view
+func ClearView(view *BarrierView) error {
+	// Collect all the keys
+	keys, err := CollectKeys(view)
+	if err != nil {
+		return err
+	}
+
+	// Delete all the keys
+	for _, key := range keys {
+		if err := view.Delete(key); err != nil {
+			return err
+		}
+	}
+	return nil
+}

vault/barrier_view_test.go

@@ -246,3 +246,39 @@ func TestBarrierView_CollectKeys(t *testing.T) {
 		t.Fatalf("out: %v expect: %v", out, expect)
 	}
 }
+
+func TestBarrierView_ClearView(t *testing.T) {
+	_, barrier, _ := mockBarrier(t)
+	view := NewBarrierView(barrier, "view/")
+
+	expect := []string{}
+	ent := []*logical.StorageEntry{
+		&logical.StorageEntry{Key: "foo", Value: []byte("test")},
+		&logical.StorageEntry{Key: "zip", Value: []byte("test")},
+		&logical.StorageEntry{Key: "foo/bar", Value: []byte("test")},
+		&logical.StorageEntry{Key: "foo/zap", Value: []byte("test")},
+		&logical.StorageEntry{Key: "foo/bar/baz", Value: []byte("test")},
+		&logical.StorageEntry{Key: "foo/bar/zoo", Value: []byte("test")},
+	}
+
+	for _, e := range ent {
+		expect = append(expect, e.Key)
+		if err := view.Put(e); err != nil {
+			t.Fatalf("err: %v", err)
+		}
+	}
+
+	// Clear the keys
+	if err := ClearView(view); err != nil {
+		t.Fatalf("err: %v", err)
+	}
+
+	// Collect the keys
+	out, err := CollectKeys(view)
+	if err != nil {
+		t.Fatalf("err: %v", err)
+	}
+	if len(out) != 0 {
+		t.Fatalf("have keys: %#v", out)
+	}
+}