cmake_host_system_information(RESULT HOSTNAME QUERY HOSTNAME)
string(TIMESTAMP TODAY "%Y%m%d-%H%M%S")

message(STATUS "PROJECT_SOURCE_DIR: ${PROJECT_SOURCE_DIR}")

if(EXISTS "${PROJECT_SOURCE_DIR}/.git")
  # 获取当前分支名称
  execute_process(
    COMMAND git rev-parse --abbrev-ref HEAD
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
    OUTPUT_VARIABLE GIT_BRANCH
    OUTPUT_STRIP_TRAILING_WHITESPACE
    )
  # string(SUBSTRING ${CURRENT_BRANCH} 0 1 CURRENT_BRANCH)
  # message(STATUS "git current branch=${CURRENT_BRANCH}")

  # 获取 git hash
  execute_process(
    COMMAND git log -1 --format=%h
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
    OUTPUT_VARIABLE GIT_COMMIT_HASH
    OUTPUT_STRIP_TRAILING_WHITESPACE
    )
  # string(SUBSTRING ${COMMIT_HASH} 0 8 COMMIT_HASH)
  # message(STATUS "git bash=${COMMIT_HASH}")

  # 获取 git tag
  execute_process(
    COMMAND git --no-pager describe --tags --always
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
    OUTPUT_VARIABLE GIT_TAG
    OUTPUT_STRIP_TRAILING_WHITESPACE
    )

  # 获取 git status
  execute_process(
    COMMAND git status -s -uno
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
    RESULT_VARIABLE
    res
    OUTPUT_VARIABLE
    out
    ERROR_QUIET
    OUTPUT_STRIP_TRAILING_WHITESPACE
    )
  if("${out}" STREQUAL "")
    set(GIT_STATUS "CLEAN")
  else()
    set(GIT_STATUS "DIRTY")
  endif()

  # 获取提交次数
  execute_process(
    COMMAND git rev-list HEAD --count
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
    OUTPUT_VARIABLE GIT_COMMIT_COUNT
    OUTPUT_STRIP_TRAILING_WHITESPACE
    )
  # string(STRIP ${COMMIT_COUNT} COMMIT_COUNT)
  # message(STATUS "git commit count=${GIT_COUNT}")

else(EXISTS "${PROJECT_SOURCE_DIR}/.git")
  set(GIT_BRANCH "No production")
  set(GIT_COMMIT_HASH "00000000")
  set(GIT_TAG "no ready version")
  set(GIT_COUNT "0")
  set(GIT_STATUS "NON")
endif(EXISTS "${PROJECT_SOURCE_DIR}/.git")

message(STATUS "Git current branch: ${GIT_BRANCH}")
message(STATUS "Git commit hash: ${GIT_COMMIT_HASH}")
message(STATUS "Git current tag: ${GIT_TAG}")
message(STATUS "Git status: ${GIT_STATUS}")
message(STATUS "Git commit count: ${GIT_COMMIT_COUNT}")
message(STATUS "Generating version.h ...")

# 生成版本信息
# set(commit_info "${GIT_BRANCH}-${GIT_COMMIT_HASH}-${GIT_TAG}-${GIT_STATUS})
# message(STATUS "Version info: ${commit_info}")

configure_file(
  ${PROJECT_SOURCE_DIR}/version.h.in
  ${PROJECT_SOURCE_DIR}/version.h
  )