I took a peek at the public forks for this repo, and I found an interesting idea implemented by @DingXuefeng about specifying a path for clang-tidy to use when looking for the compilation database file.

This contribution would mean cherry picking a couple commits from @DingXuefeng's fork, namely DingXuefeng@d54440f & DingXuefeng@5891eba

I should note that the bugfix commit is already part of the changes in #40

Any objections?