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Githooks for C++

This repository contains shared repository Git hooks for shell scripts in githooks/* to be used with the Githooks Manager.

The following is included:

• Hook to format C++ files with clang-format (pre-commit). A configuration file to use in your repository is config/.clang-format.
• Hook to format CMake files with cmake-format (pre-commit).
• Hook to check for dead includes in C++ files (pre-commit).
• Hook to check for private includes pre-commit).
• Scripts to format/check all files according to the hooks.

• Githooks for C++
  • Requirements
  • Installation
  • Hook: pre-commit/1-format/.format-cpp.h
    • Git Config Variables
  • Hook: pre-commit/1-format/format-glsl.yaml
  • Hook: pre-commit/1-format/format-cmake.yaml
  • Hook: pre-commit/2-check/check-private-includes-cpp.yaml
  • Hook: pre-commit/2-check/check-no-dead-includes-cpp.yaml
  • Scripts
  • Testing

Requirements

Run them containerized where only docker is required.

If you want to run them non-containerized, make the following installed on your system:

• clang-format
• cmake-format
• bash
• GNU grep
• GNU sed
• GNU find
• GNU xargs
• GNU parallel [optional]

This works with Windows setups too.

Installation

The hooks can be used by simply using this repository as a shared hook repository inside C++ projects. See further documentation.

You should configure the shared hook repository in your project to use this repos main branch by using the following .githooks/.shared.yaml :

version: 1
urls:
  - https://github.com/gabyx/githooks-cpp.git@main`.

Hook: pre-commit/1-format/.format-cpp.h

Formats C++ files with clang-format.

By settings the global Git config value githooks-cpp.clangFormat to the clang-format dispatch utility, the correct clang-format version can be selected. The dispatch utility dispatches to the different clang-format versions depending on the header in the found clang format config file, that means a .clang-format config can define the version to be used by the following comment header:

# Version: 12.0.0

Git Config Variables

• githooks-cpp.clangFormat : Auxiliary path to a clang-format executable (any Git config level).

Hook: pre-commit/1-format/format-glsl.yaml

Same as pre-commit/1-format/format-cpp.yaml.

Hook: pre-commit/1-format/format-cmake.yaml

Formats all *.cmake and CMakeLists.txt files by using configs/.cmake-format.json as well as the <repo-root>/cmake-format.json which can contain project-specific additional_commands overrides. This hook needs cmake-format installed.

Because CMake is a macro language, the formatter needs to know how to format commands and therefore we use this repository's config in configs/.cmake-format.json.

Hook: pre-commit/2-check/check-private-includes-cpp.yaml

If a project uses merged header placement as described in PR1204R0 and also complies more or less to the Pitchfork layout (at least for the src directory), this hook ensures that no private headers defined as

• files in src/<lib-name>.*/private/.*
• files in src/<lib-name>.*/details/.*

are included in files src/<other-lib-name>/.../.*. Such includes are by definition architectural design errors and can be enforced by this hook.

Hook: pre-commit/2-check/check-no-dead-includes-cpp.yaml

Checks that no commented includes are found in C++ files.

Scripts

The following scripts are provided:

• format-cpp-all.sh : Script to format all C++ files in a directory recursively. See documentation.
• format-cmake-all.sh : Script to format all CMake files in a directory recursively. See documentation.

They can be used in scripts by doing the following trick inside a repo which uses this hook:

shellHooks=$(git hooks shared root ns:githooks-cpp)
"$shellHooks/githooks/scripts/<script-name>.sh"

Testing

The containerized tests in tests/* are executed by

tests/test.sh

or only special tests steps by

tests/test.sh --seq 001..010

For showing the output also in case of success use:

tests/test.sh --show-output [other-args]