Levi Armstrong

@ipa-mdl I must have had a error because running your script everything worked. Thank you for taking a look.

@ipa-mdl Is there plans to incorporate your functionality into industrial_ci?

I have been reading the original [PR](https://github.com/ros-industrial/industrial_ci/pull/182). It is has a comment that the Ubuntu Debian sets up the symbolic links if you call `update-ccache-symlinks`.

Well I don't think you want to use the symlinks. I think the CMake preferred approach is to use the `_COMPILER_LAUNCHER` so cmake is aware.

This came up because when I build my workspace without clang-tidy the ccache is around 400MB, but if I build with clang-tidy enabled it is around 40MB.

Sure, Yea I think this specific to using external launchers like Clang-Tidy. I am going to test locally and see what needs to change.

I cannot find how industrial_ci sets up ccache. I looked into ccache and when it installs it create symlinks to gcc and g++ and when you are suppose to update...

I cannot find where the path is exported except what you have posted, but is that not just a test?

I believe I was mistaken, I thought source_tests.sh was a unit test of industrial_ci. This is not a unit test correct?

Now it makes sense. I know what I need to change to see if it improves ccache with clang tidy.