# Copyright (c) 2023, AgiBot Inc.
# All rights reserved.

include(FetchContent)

message(STATUS "get gflags ...")

set(gflags_DOWNLOAD_URL
    "https://github.com/gflags/gflags/archive/v2.2.2.tar.gz"
    CACHE STRING "")

if(gflags_LOCAL_SOURCE)
  FetchContent_Declare(
    gflags
    SOURCE_DIR ${gflags_LOCAL_SOURCE}
    OVERRIDE_FIND_PACKAGE)
else()
  FetchContent_Declare(
    gflags
    URL ${gflags_DOWNLOAD_URL}
    DOWNLOAD_EXTRACT_TIMESTAMP TRUE
    OVERRIDE_FIND_PACKAGE)
endif()

# Wrap it in a function to restrict the scope of the variables
function(get_gflags)
  FetchContent_GetProperties(gflags)
  if(NOT gflags_POPULATED)
    FetchContent_Populate(gflags)

    set(BUILD_TESTING OFF)

    file(READ ${gflags_SOURCE_DIR}/CMakeLists.txt TMP_VAR)
    string(REPLACE "  set (PKGCONFIG_INSTALL_DIR " "# set (PKGCONFIG_INSTALL_DIR " TMP_VAR "${TMP_VAR}")
    file(WRITE ${gflags_SOURCE_DIR}/CMakeLists.txt "${TMP_VAR}")

    add_subdirectory(${gflags_SOURCE_DIR} ${gflags_BINARY_DIR})

  endif()
endfunction()

get_gflags()

# import targets:
# gflags::gflags