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Clang Format Style
OpenStudio uses the clang-format utility to enforce code styling rules that are defined in the .clang-format file. While the CI system will automatically run the clang-format utility to check and make sure the code is properly formatted, it is up to the developer to apply these rules to the code. The clang format tool is easy to run and is supported on all platforms.
The installer binaries can be downloaded from https://releases.llvm.org/. OpenStudio is using version 11.
Once the clang-format is installed, you can run it by using the CI script that compares cpp|hpp|c|h file types that have been modified by your branch. For example, if I created a branch issue_4000 and I want to create a pull request to the develop branch, I would run the clang-format.sh as follows:
./ci/clang-format.sh issue_4000 develop
The above will first identify the files that have changed between issue_4000 and develop and then run the clang-format utility on those files. The clang-format utility will automatically apply styling rules to any files that need to be updated. After it runs, commit any changed files back the branch and then re-run the tool again to verify than no changes have been made by clang-format.
Another way to run clang-format is to run it on the entire code base, or a sub-directory of the code base. For example, here are some useful commands to run clang-format on every cpp|hpp|c|h file under ./src directory
find ./src -regextype posix-extended -regex '.*\.(cpp|hpp|c|h)$' | xargs clang-format -style=file -i -fallback-style=none
find -E ./src -regex '.*\.(cpp|hpp|c|h)$' | xargs clang-format -style=file -i -fallback-style=none
Many IDEs allow integration of the clang-format utility. Some useful links below to setup for popular IDEs.