CMake

Question

我正在使用 Cmake 遍历目录中的所有 .py 文件并检测错误并使用 Pylint 检查编码标准。

有没有办法让我检查是否使用 cmake 安装了 Pylint？此代码是否 OS 独立（例如 Ubuntu 和 Windows）？

Answer 1

您应该创建一个 FindPylint.cmake 文件和 include() 它的目录。然后运行 find_package(Pylint REQUIRED).

FindPylint.cmake:

execute_process(
    COMMAND pylint --version
    OUTPUT_VARIABLE pylint_out
    RESULT_VARIABLE pylint_error
    ERROR_VARIABLE pylint_suppress)

if (NOT pylint_error)
    string(REGEX MATCH "pylint .\..\.." pylint_version_string "${pylint_out}")
    string(SUBSTRING "${pylint_version_string}" 7 5 pylint_version)
endif ()

if (pylint_version)
    set(PYLINT_FOUND 1
        CACHE INTERNAL "Pylint version ${pylint_version} found")
endif ()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Pylint REQUIRED_VARS pylint_version
                                    VERSION_VAR pylint_version)

一些解释：

错误输出实际上不是错误，它显示为 No config file found, using default configuration，因此我们通过忽略 pylint_suppress 变量来抑制它。
pylint 输出不仅仅是版本，所以我们需要做一些 regex/string 处理。
CACHE INTERNAL 变量不是绝对必要的，但稍后可以派上用场以检查是否找到 Pylint。

Answer 2

CMakeLists.txt:

list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR})

find_package ( Pylint )

if ( PYLINT_FOUND )
  message ( STATUS "pylint version: ${PYLINT_VERSION}" )
endif ()

并在同一目录下添加FindPylint.cmake:

# - Find Pylint
# Find the Pylint executable and extract the version number
#
# OUTPUT Variables
#
#   PYLINT_FOUND
#       True if the pylint package was found
#   PYLINT_EXECUTABLE
#       The pylint executable location
#   PYLINT_VERSION
#       A string denoting the version of pylint that has been found

find_program ( PYLINT_EXECUTABLE pylint PATHS /usr/bin )

if ( PYLINT_EXECUTABLE )
  execute_process ( COMMAND ${PYLINT_EXECUTABLE} --version OUTPUT_VARIABLE PYLINT_VERSION_RAW ERROR_QUIET )
  if (PYLINT_VERSION_RAW)
    string ( REGEX REPLACE "^pylint ([0-9]+.[0-9]+.[0-9]+),.*" "\1" PYLINT_VERSION ${PYLINT_VERSION_RAW})
  else ()
    set ( PYLINT_VERSION "unknown" )
  endif()
endif ()

include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS ( Pylint DEFAULT_MSG PYLINT_EXECUTABLE )

mark_as_advanced ( PYLINT_EXECUTABLE PYLINT_VERSION )

基于此code。

CMake - 检查是否安装了 Pylint

CMake - Check if Pylint is installed

pylint