cmake clang-tidy(或其他脚本)作为自定义目标

cmake clang-tidy (or other script) as custom target

我正在尝试为 clang-tidy 创建一个自定义 cmake 目标,以检查我的项目。源文件夹看起来像这样:

src/scripts/run-clang-tidy.py
src/.clang-tidy
src/...

到目前为止,我的计划是使用自定义命令将这两个文件复制到构建目录:

add_custom_command(
    OUTPUT run-clang-tidy.py .clang-tidy
    COMMAND cp ${CMAKE_SOURCE_DIR}/scripts/run-clang-tidy.py ${CMAKE_SOURCE_DIR}/.clang-tidy ${CMAKE_CURRENT_BINARY_DIR})

我现在想在构建目录(应该是工作目录)中使用自定义目标调用 run-clang-tidy.py,这样我就可以调用:

make lint

运行 .clang-tidy 中指定的检查。

要使此脚本正常工作,它还需要 CMAKE_EXPORT_COMPILE_COMMANDS 选项。我尝试使用以下命令设置它,但它无法识别它:

add_definitions(-DCMAKE_EXPORT_COMPILE_COMMANDS=ON)

add_custom_target 的调用会是什么样子?

add_definitions 设置 CMake 变量,仅在配置阶段可用。如果要为在构建阶段执行的命令设置 environment 变量,请使用适当的 shell 机制和 COMMAND 关键字:

add_custom_target(lint
    COMMAND CMAKE_EXPORT_COMPILE_COMMANDS=ON python run-clang-tidy.py
    DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/run-clang-tidy.py
            ${CMAKE_CURRENT_BINARY_DIR}/.clang-tidy

COMMAND 关键字指定的所有内容都将由 shell "as is" 解释(在解释 CMake 之后,这里是无操作)。

我可以建议另一种方法,它不需要额外的 Python 脚本。

首先,我想在自定义CMake规则中集成clang-tidyclang-format,所以我首先生成了.clang-tidy.clang-format文件,它们位于项目的根目录。

正在生成配置文件

要生成 .clang-tidy,首先为您的项目找到合适的选项,然后执行以下操作:

$> clang-tidy <source-files> -dump-config <tidy-options> -- <compile-options> > .clang-tidy

clang-format 类似,您可以使用 -style=xxx 选项从默认样式开始,然后转储它。例如,从 LLVM 样式开始:

$> clang-format -style=LLVM -dump-config > .clang-format

然后,根据需要对其进行编辑和配置。它应该是这样的:

---
Language:        Cpp
# BasedOnStyle:  LLVM
AccessModifierOffset: -2
AlignAfterOpenBracket: true
AlignEscapedNewlinesLeft: false
AlignOperands:   true
AlignTrailingComments: true
AllowAllParametersOfDeclarationOnNextLine: true
AllowShortBlocksOnASingleLine: false
AllowShortCaseLabelsOnASingleLine: false
AllowShortIfStatementsOnASingleLine: false
AllowShortLoopsOnASingleLine: false
AllowShortFunctionsOnASingleLine: All
AlwaysBreakAfterDefinitionReturnType: false
AlwaysBreakTemplateDeclarations: false
AlwaysBreakBeforeMultilineStrings: false
BreakBeforeBinaryOperators: None
BreakBeforeTernaryOperators: true
BreakConstructorInitializersBeforeComma: false
BinPackParameters: true
BinPackArguments: true
ColumnLimit:     80
ConstructorInitializerAllOnOneLineOrOnePerLine: false
ConstructorInitializerIndentWidth: 4
DerivePointerAlignment: false
ExperimentalAutoDetectBinPacking: false
IndentCaseLabels: false
IndentWrappedFunctionNames: false
IndentFunctionDeclarationAfterType: false
MaxEmptyLinesToKeep: 1
KeepEmptyLinesAtTheStartOfBlocks: true
NamespaceIndentation: None
ObjCBlockIndentWidth: 2
ObjCSpaceAfterProperty: false
ObjCSpaceBeforeProtocolList: true
PenaltyBreakBeforeFirstCallParameter: 19
PenaltyBreakComment: 300
PenaltyBreakString: 1000
PenaltyBreakFirstLessLess: 120
PenaltyExcessCharacter: 1000000
PenaltyReturnTypeOnItsOwnLine: 60
PointerAlignment: Right
SpacesBeforeTrailingComments: 1
Cpp11BracedListStyle: true
Standard:        Cpp11
IndentWidth:     2
TabWidth:        8
UseTab:          Never
BreakBeforeBraces: Attach
SpacesInParentheses: false
SpacesInSquareBrackets: false
SpacesInAngles:  false
SpaceInEmptyParentheses: false
SpacesInCStyleCastParentheses: false
SpaceAfterCStyleCast: false
SpacesInContainerLiterals: true
SpaceBeforeAssignmentOperators: true
ContinuationIndentWidth: 4
CommentPragmas:  '^ IWYU pragma:'
ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]
SpaceBeforeParens: ControlStatements
DisableFormat:   false
...

创建自定义 CMake 规则

CMake 允许以非常简单的方式定义自定义规则,您只需在文件中编写一组 CMake 命令并调用 add_custom_target() 过程,然后将其包含在您的 CMakeList.txt 文件。这就是我们要做的,我们首先在项目的根目录下创建一个 cmake/clang-dev-tools.cmake 文件:

# Additional target to perform clang-format/clang-tidy run
# Requires clang-format and clang-tidy

# Get all project files
file(GLOB_RECURSE ALL_SOURCE_FILES *.cpp *.hpp)

add_custom_target(
        clang-format
        COMMAND /usr/bin/clang-format
        -style=file
        -i
        ${ALL_SOURCE_FILES}
)

add_custom_target(
        clang-tidy
        COMMAND /usr/bin/clang-tidy
        ${ALL_SOURCE_FILES}
        -config=''
        --
        -std=c++11
        ${INCLUDE_DIRECTORIES}
)

然后,编辑你 CMakeLists.txt 并添加:

# Including extra cmake rules
include(cmake/clang-dev-tools.cmake)

然后,一旦构建系统重新生成,您应该能够 运行 make clang-tidymake clang-format.

自 CMake 3.6 起,实现了 clang-tidy 的原生集成 [1, 2]. Mechanics are similar to include-what-you-use integration that was there since CMake 3.3 [3]。

Alexander Shukaev提到的文档在细节上有点短,所以我添加了一个例子。警告字符串的格式使 IDE 认为 clang-tidy 结果是编译器警告,并将标记源代码。此外,它在创建目标文件后并行运行每个文件。

if ( CMAKE_VERSION GREATER "3.5" )
  set(ENABLE_CLANG_TIDY OFF CACHE BOOL "Add clang-tidy automatically to builds")
  if (ENABLE_CLANG_TIDY)
    find_program (CLANG_TIDY_EXE NAMES "clang-tidy" PATHS /usr/local/opt/llvm/bin )
    if (CLANG_TIDY_EXE)
      message(STATUS "clang-tidy found: ${CLANG_TIDY_EXE}")
      set(CLANG_TIDY_CHECKS "-*,modernize-*")
      set(CMAKE_CXX_CLANG_TIDY "${CLANG_TIDY_EXE};-checks=${CLANG_TIDY_CHECKS};-header-filter='${CMAKE_SOURCE_DIR}/*'"
        CACHE STRING "" FORCE)
    else()
      message(AUTHOR_WARNING "clang-tidy not found!")
      set(CMAKE_CXX_CLANG_TIDY "" CACHE STRING "" FORCE) # delete it
    endif()
  endif()
endif()

我遇到的唯一问题是它仍然会检查自动生成的 moc_*.cxx 文件和来自 ExternalProject.

中代码的常见警告警告