I have large project using CMake. I want to add clang_tidy-8
support with following code:
set(BORG_CLANG_TIDY OFF CACHE STRING "If enabled, clang-tidy will be used. If set to 'fix', fixes will be done on source")
set_property(CACHE BORG_CLANG_TIDY PROPERTY STRINGS ON OFF fix)
if(BORG_CLANG_TIDY)
if (BORG_CLANG_TIDY STREQUAL "fix")
set(maybe_fix -fix)
endif()
set(CMAKE_CXX_CLANG_TIDY clang-tidy-8 -extra-arg=-Wno-unknown-warning-option -format-style=file ${maybe_fix} )
endif()
I put proper .clang-tidy
in root directory of project (proper = with desired checks). However, there are directories that I don't want clang tidy to check/fix (3rdparty and legacy code that can't be modified because it is brittle). So I tried putting empty .clang-tidy
file in those directories (empty = with -checks=-*
). This doesn't work because Error: no checks enabled.
I hoped to find some some fake -checks=-*,hello-world-do-nothing-check
but nothing presented itself.
Is there other way to disable checks in selected subdirectories (/subtrees)? Those directories are static and may be hardcoded in CMake if needed.
If you want a dummy check that would do nothing there's at least one that's pretty easy to disable by its options: misc-definitions-in-headers
The HeaderFileExtensions
option can be used to make the check work with only certain header file suffixes. If you set it to something non-existent line "x" then you have a hello-world-do-nothing-check
alternative. Your clang-tidy file would then look something like this:
Checks: '-*,misc-definitions-in-headers'
CheckOptions:
- { key: HeaderFileExtensions, value: "x" }
You can also check https://stackoverflow.com/a/56319752/9874699 and try to adapt the line-filter
to filter out files from certain directories.