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diff --git a/docs/CODE_QUALITY.md b/docs/CODE_QUALITY.md new file mode 100644 index 0000000..166b307 --- /dev/null +++ b/docs/CODE_QUALITY.md @@ -0,0 +1,85 @@ +--- +title: Code Quality Tools +category: Contributing +layout: default +SPDX-License-Identifier: LGPL-2.1-or-later +--- + +# Code Quality Tools + +The systemd project has a number of code quality tools set up in the source +tree and on the github infrastructure. Here's an incomprehensive list of the +available functionality: + +1. Use `meson test -C build` to run the unit tests. Some tests are skipped if + no privileges are available, hence consider also running them with `sudo + meson test -C build`. A couple of unit tests are considered "unsafe" (as + they change system state); to run those too, build with `meson setup + -Dtests=unsafe`. Finally, some unit tests are considered to be very slow, + build them too with `meson setup -Dslow-tests=true`. (Note that there are a + couple of manual tests in addition to these unit tests.) (Also note: you can + change these flags for an already set up build tree, too, with "meson + configure -C build -D…".) + +2. Use `./test/run-integration-tests.sh` to run the full integration test + suite. This will build OS images with a number of integration tests and run + them using `systemd-nspawn` and `qemu`. Requires root. + +3. Use `./coccinelle/run-coccinelle.sh` to run all + [Coccinelle](http://coccinelle.lip6.fr/) semantic patch scripts we ship. The + output will show false positives, hence take it with a pinch of salt. + +4. Use `./tools/find-double-newline.sh recdiff` to find double newlines. Use + `./tools/find-double-newline.sh recpatch` to fix them. Take this with a grain + of salt, in particular as we generally leave foreign header files we include in + our tree unmodified, if possible. + +5. Similar use `./tools/find-tabs.sh recdiff` to find TABs, and + `./tools/find-tabs.sh recpatch` to fix them. (Again, grain of salt, foreign + headers should usually be left unmodified.) + +6. Use `ninja -C build check-api-docs` to compare the list of exported symbols + of `libsystemd.so` and `libudev.so` with the list of man pages. Symbols + lacking documentation are highlighted. + +7. Use `ninja -C build update-hwdb` and `ninja -C build update-hwdb-autosuspend` + to automatically download and import the PCI, USB, and OUI databases and the + autosuspend quirks into the hwdb. + +8. Use `ninja -C build update-man-rules` to update the meson rules for building + man pages automatically from the docbook XML files included in `man/`. + +9. There are multiple CI systems in use that run on every github pull request + submission or update. + +10. [Coverity](https://scan.coverity.com/) is analyzing systemd `main` branch + in regular intervals. The reports are available + [online](https://scan.coverity.com/projects/systemd). + +11. [OSS-Fuzz](https://github.com/google/oss-fuzz) is continuously fuzzing the + codebase. Reports are available + [online](https://oss-fuzz.com/testcases?project=systemd&open=yes). + It also builds + [coverage reports](https://oss-fuzz.com/coverage-report/job/libfuzzer_asan_systemd/latest) + daily. + +12. Our tree includes `.editorconfig`, `.dir-locals.el` and `.vimrc` files, to + ensure that editors follow the right indentiation styles automatically. + +13. When building systemd from a git checkout the build scripts will + automatically enable a git commit hook that ensures whitespace cleanliness. + +14. [CodeQL](https://codeql.github.com/) analyzes each PR and every commit + pushed to `main`. The list of active alerts can be found + [here](https://github.com/systemd/systemd/security/code-scanning). + +15. Each PR is automatically tested with [Address Sanitizer](https://clang.llvm.org/docs/AddressSanitizer.html) + and [Undefined Behavior Sanitizer](https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html). + See [Testing systemd using sanitizers](TESTING_WITH_SANITIZERS) + for more information. + +16. Fossies provides [source code misspelling reports](https://fossies.org/features.html#codespell). + The systemd report can be found [here](https://fossies.org/linux/misc/systemd/codespell.html). + +Access to Coverity and oss-fuzz reports is limited. Please reach out to the +maintainers if you need access. |