text: # -*- coding: utf-8 -*-
  #
  
  import os
  import sys
  import subprocess
  
  from setuptools import setup, Extension
  from setuptools.command.build_ext import build_ext
  
  fallback_ver = '0.0.7'
  
  # Convert distutils Windows platform specifiers to CMake -A arguments
  PLAT_TO_CMAKE = {
      "win32": "Win32",
      "win-amd64": "x64",
      "win-arm32": "ARM",
      "win-arm64": "ARM64",
  }
  
  # A CMakeExtension needs a sourcedir instead of a file list.
  class CMakeExtension(Extension):
      def __init__(self, name, sourcedir=""):
          Extension.__init__(self, name, sources=[], libraries=['re2'])
          self.sourcedir = os.path.abspath(sourcedir)
  
  
  class CMakeBuild(build_ext):
      def run(self):
          # This is optional - will print a nicer error if CMake is missing.
          # Since we force CMake via PEP 518 in the pyproject.toml, this should
          # never happen and this whole method can be removed in your code if you
          # want.
          try:
              subprocess.check_output(["cmake", "--version"])
          except OSError:
              msg = "CMake missing - probably upgrade to a newer version of Pip?"
              raise RuntimeError(msg)
  
          # To support Python 2, we have to avoid super(), since distutils is all
          # old-style classes.
          build_ext.run(self)
  
      def build_extension(self, ext):
          extdir = os.path.abspath(os.path.dirname(self.get_ext_fullpath(ext.name)))
  
          # required for auto-detection of auxiliary "native" libs
          if not extdir.endswith(os.path.sep):
              extdir += os.path.sep
  
          # Set a sensible default build type for packaging
          if "CMAKE_BUILD_OVERRIDE" not in os.environ:
              cfg = "Debug" if self.debug else "RelWithDebInfo"
          else:
              cfg = os.environ.get("CMAKE_BUILD_OVERRIDE", "")
  
          # CMake lets you override the generator - we need to check this.
          # Can be set with Conda-Build, for example.
          cmake_generator = os.environ.get("CMAKE_GENERATOR", "")
  
          # Set Python_EXECUTABLE instead if you use PYBIND11_FINDPYTHON
          # SCM_VERSION_INFO shows you how to pass a value into the C++ code
          # from Python.
          cmake_args = [
              "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY={}".format(extdir),
              "-DPYTHON_EXECUTABLE={}".format(sys.executable),
              "-DSCM_VERSION_INFO={}".format(fallback_ver),
              "-DCMAKE_BUILD_TYPE={}".format(cfg),  # not used on MSVC, but no harm
          ]
          build_args = ["--verbose"]
  
          # CMake also lets you provide a toolchain file.
          # Can be set in CI build environments for example.
          cmake_toolchain_file = os.environ.get("CMAKE_TOOLCHAIN_FILE", "")
          if cmake_toolchain_file:
              cmake_args += ["-DCMAKE_TOOLCHAIN_FILE={}".format(cmake_toolchain_file)]
  
          if self.compiler.compiler_type != "msvc":
              # Using Ninja-build since it a) is available as a wheel and b)
              # multithreads automatically. MSVC would require all variables be
              # exported for Ninja to pick it up, which is a little tricky to do.
              # Users can override the generator with CMAKE_GENERATOR in CMake
              # 3.15+.
              if not cmake_generator:
                  cmake_args += ["-GNinja"]
  
          else:
  
              # Single config generators are handled "normally"
              single_config = any(x in cmake_generator for x in {"NMake", "Ninja"})
  
              # CMake allows an arch-in-generator style for backward compatibility
              contains_arch = any(x in cmake_generator for x in {"ARM", "Win64"})
  
              # Specify the arch if using MSVC generator, but only if it doesn't
              # contain a backward-compatibility arch spec already in the
              # generator name.
              if not single_config and not contains_arch:
                  cmake_args += ["-A", PLAT_TO_CMAKE[self.plat_name]]
  
              # Multi-config generators have a different way to specify configs
              if not single_config:
                  cmake_args += [
                      "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_{}={}".format(cfg.upper(), extdir)
                  ]
                  build_args += ["--config", cfg]
  
          # Set CMAKE_BUILD_PARALLEL_LEVEL to control the parallel build level
          # across all generators.
          if "CMAKE_BUILD_PARALLEL_LEVEL" not in os.environ:
              # self.parallel is a Python 3 only way to set parallel jobs by hand
              # using -j in the build_ext call, not supported by pip or PyPA-build.
              if hasattr(self, "parallel") and self.parallel:
                  # CMake 3.12+ only.
                  build_args += ["-j{}".format(self.parallel)]
  
          if not os.path.exists(self.build_temp):
              os.makedirs(self.build_temp)
  
          subprocess.check_call(
              ["cmake", ext.sourcedir] + cmake_args, cwd=self.build_temp
          )
          subprocess.check_call(
              ["cmake", "--build", "."] + build_args, cwd=self.build_temp
          )
  
  
  setup(
      use_scm_version={'fallback_version': fallback_ver},
      setup_requires=['setuptools_scm'],
      ext_modules=[CMakeExtension('_re2')],
      cmdclass={'build_ext': CMakeBuild},
  )
  