tree 9db0b6bd746646486aa990daecf8e3302c49b4c0
parent ac4818d6afe80cb71d19d34cd6c36fd9a04e7b6d
author Tianjie Xu <xunchang@google.com> 1519775771 -0800
committer Tianjie Xu <xunchang@google.com> 1519845551 -0800

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