Add a singleton CacheLocation to replace the hard coded locations
This class allows us to set the following locations dynamically:
cache_temp_source, last_command_file, stash_directory_base.
In the updater's main function, we reset the values of these variables
to their default locations in /cache; while we can set them to temp
files in unit tests or host simulation.
Test: unit tests pass
Change-Id: I528652650caa41373617ab055d41b1f1a4ec0f87
diff --git a/otautil/cache_location.cpp b/otautil/cache_location.cpp
new file mode 100644
index 0000000..8f28948
--- /dev/null
+++ b/otautil/cache_location.cpp
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "otautil/cache_location.h"
+
+constexpr const char kDefaultCacheTempSource[] = "/cache/saved.file";
+constexpr const char kDefaultLastCommandFile[] = "/cache/recovery/last_command";
+constexpr const char kDefaultStashDirectoryBase[] = "/cache/recovery";
+
+CacheLocation& CacheLocation::location() {
+ static CacheLocation cache_location;
+ return cache_location;
+}
+
+void CacheLocation::ResetLocations() {
+ cache_temp_source_ = kDefaultCacheTempSource;
+ last_command_file_ = kDefaultLastCommandFile;
+ stash_directory_base_ = kDefaultStashDirectoryBase;
+}