Cmake 在自定义_目标中执行git descripe

我想将

git descripe

的输出作为字符串写入文件，这样我就可以将信息嵌入到我的二进制文件（C++）中。这必须跨平台工作

我能想到的最好的办法是：

add_custom_target( SubmarineGitVersion
    COMMAND cmd /c "${CMAKE_EXECUTABLE}" echo czstring GIT_VERSION = STRINGIFY\( > "${CMAKE_CURRENT_BINARY_DIR}/GitVersion.hpp"
    COMMAND cmd /c "${GIT_EXECUTABLE}" describe --tags --always >> "${CMAKE_CURRENT_BINARY_DIR}/GitVersion.hpp"
    COMMAND cmd /c "${CMAKE_EXECUTABLE}" echo \) >> "${CMAKE_CURRENT_BINARY_DIR}/GitVersion.hpp"
)

这大致适用于Windows（末尾缺少一个

；

）：

有没有更好/更跨平台的方法来实现这一点？

创建“版本”文件的常用方法是使用

configure\u file

命令。在配置阶段创建文件的方式如下：

GitVersion.hpp.in：

czstring GIT_VERSION = STRINGIFY(
${GIT_REPO_VERSION}
)

# Store version into variable
execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --always
    OUTPUT_VARIABLE GIT_REPO_VERSION)
# The variable will be used when file is configured
configure_file("GitVersion.hpp.in" "GitVersion.hpp")

# Git executable is extracted from parameters.
execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --always
    OUTPUT_VARIABLE GIT_REPO_VERSION)
# Input and output files are extracted from parameters.
configure_file(${INPUT_FILE} ${OUTPUT_FILE})

add_custom_target( SubmarineGitVersion
    COMMAND ${CMAKE_COMMAND}
        -D GIT_EXECUTABLE=${GIT_EXECUTABLE}
        -D INPUT_FILE=${CMAKE_CURRENT_SOURCE_DIR}/GitVersion.hpp.in
        -D OUTPUT_FILE=${CMAKE_CURRENT_BINARY_DIR}/GitVersion.hpp
        -P ${CMAKE_CURRENT_SOURCE_DIR}/generate_version.cmake
)

CMakeLists.txt：

czstring GIT_VERSION = STRINGIFY(
${GIT_REPO_VERSION}
)

# Store version into variable
execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --always
    OUTPUT_VARIABLE GIT_REPO_VERSION)
# The variable will be used when file is configured
configure_file("GitVersion.hpp.in" "GitVersion.hpp")

# Git executable is extracted from parameters.
execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --always
    OUTPUT_VARIABLE GIT_REPO_VERSION)
# Input and output files are extracted from parameters.
configure_file(${INPUT_FILE} ${OUTPUT_FILE})

add_custom_target( SubmarineGitVersion
    COMMAND ${CMAKE_COMMAND}
        -D GIT_EXECUTABLE=${GIT_EXECUTABLE}
        -D INPUT_FILE=${CMAKE_CURRENT_SOURCE_DIR}/GitVersion.hpp.in
        -D OUTPUT_FILE=${CMAKE_CURRENT_BINARY_DIR}/GitVersion.hpp
        -P ${CMAKE_CURRENT_SOURCE_DIR}/generate_version.cmake
)

如果要在构建阶段创建版本文件，请将上面的cmake命令移动到某个文件中，并在cmake脚本模式下执行此文件：

生成\u版本.cmake：

czstring GIT_VERSION = STRINGIFY(
${GIT_REPO_VERSION}
)

# Store version into variable
execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --always
    OUTPUT_VARIABLE GIT_REPO_VERSION)
# The variable will be used when file is configured
configure_file("GitVersion.hpp.in" "GitVersion.hpp")

# Git executable is extracted from parameters.
execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --always
    OUTPUT_VARIABLE GIT_REPO_VERSION)
# Input and output files are extracted from parameters.
configure_file(${INPUT_FILE} ${OUTPUT_FILE})

add_custom_target( SubmarineGitVersion
    COMMAND ${CMAKE_COMMAND}
        -D GIT_EXECUTABLE=${GIT_EXECUTABLE}
        -D INPUT_FILE=${CMAKE_CURRENT_SOURCE_DIR}/GitVersion.hpp.in
        -D OUTPUT_FILE=${CMAKE_CURRENT_BINARY_DIR}/GitVersion.hpp
        -P ${CMAKE_CURRENT_SOURCE_DIR}/generate_version.cmake
)

CMakeLists.txt：

czstring GIT_VERSION = STRINGIFY(
${GIT_REPO_VERSION}
)

# Store version into variable
execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --always
    OUTPUT_VARIABLE GIT_REPO_VERSION)
# The variable will be used when file is configured
configure_file("GitVersion.hpp.in" "GitVersion.hpp")

# Git executable is extracted from parameters.
execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --always
    OUTPUT_VARIABLE GIT_REPO_VERSION)
# Input and output files are extracted from parameters.
configure_file(${INPUT_FILE} ${OUTPUT_FILE})

add_custom_target( SubmarineGitVersion
    COMMAND ${CMAKE_COMMAND}
        -D GIT_EXECUTABLE=${GIT_EXECUTABLE}
        -D INPUT_FILE=${CMAKE_CURRENT_SOURCE_DIR}/GitVersion.hpp.in
        -D OUTPUT_FILE=${CMAKE_CURRENT_BINARY_DIR}/GitVersion.hpp
        -P ${CMAKE_CURRENT_SOURCE_DIR}/generate_version.cmake
)