Add four reusable building blocks that upcoming CI optimization PRs will
consume. No existing workflow is modified; these files are dormant until
referenced.
- .github/actions/setup-ccache: restore ~/.ccache with content-hash keys,
write ccache.conf with compression and content-based compiler check
- .github/actions/save-ccache: print stats and save the cache under the
primary key produced by setup-ccache
- .github/actions/build-gazebo-sitl: build px4_sitl_default plus the
Gazebo Classic plugins with ccache stats between stages
- Tools/ci/run-clang-tidy-pr.py: compute the translation units affected
by a PR diff and invoke Tools/run-clang-tidy.py on that subset only,
exiting silently when no C++ files changed
Signed-off-by: Ramon Roche <mrpollo@gmail.com>
eb9a76cfaf