"clang-tidy" is a static code analysis tool for c and c++ code. See https://listman.redhat.com/archives/libvir-list/2021-January/msg01152.html for some issues found by clang-tidy and more background information. Meson has support for clang-tidy and generates target named "clang-tidy" if it finds a ".clang-tidy" configuration file in the project's root directory. There are some problems with this approach though, with regards to inclusion in GitLab's CI: * Single-threaded runtime of a complete scan takes between 95 and 110 minutes, depending on the enabled checks, which is significantly longer than GitLab's maximum run time of 60 minutes, after which jobs are aborted. * Even without this limit on runtime, this new check would double to triple the run time of the libVirt pipeline in GitLab. * clang-tidy finds a lot of false positives (see link above for explanation) and has checks that contradict the libVirt code style (e.g. braces around blocks). This makes a quite complex configuration in ".clang-tidy" neccessary. * I was unable to make clang-tidy recognize the settings from the configuration file for generated files, leading clang-tidy to always add some checks. These checks were among those that produced false positives. * The list of enabled / disabled checks in the yaml configuration file is a quite long string, making it hard to weave in some comments / documentation on which checks are enabled / disabled for what reason. This series introduces a new script, "run-clang-tidy.py". This is a replacement for the script of the same name from clang-tools-extra. It offers parallel execution, caching of results and a configurable soft-timeout. Please see the individual commits for more details. Comments welcome. https://gitlab.com/twiederh/libvirt/-/pipelines/255321968 → "clang-tidy". Tim Tim Wiederhake (10): clang-tidy: Add a simple runner clang-tidy: Run in parallel clang-tidy: Filter output clang-tidy: Add cache clang-tidy: Add timeout clang-tidy: Allow timeouts clang-tidy: Add shuffle clang-tidy: Make list of checks explicit clang-tidy: Disable irrelevant and failing checks clang-tidy: Add CI integration .gitlab-ci.yml | 88 ++++++ scripts/run-clang-tidy.py | 557 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 645 insertions(+) create mode 100755 scripts/run-clang-tidy.py -- 2.26.2
