old_contents: # Copyright 2019 Google LLC
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  # Generates the BUILD file for the python package.
  # It includes special comment lines that instruct the hosting program
  # on how to setup the filesystem.
  # Debugging hint: Just runt his with python to see what it prints.
  """Generates a bazel BUILD file for the repo."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import json
  import os
  import sys
  
  from distutils import sysconfig
  
  extra_srcs = []
  exec_prefix = sys.base_exec_prefix
  
  # Print some directives for the calling starlark program.
  print("# SYMLINK: {abs}\t{ws}".format(
      abs=sysconfig.get_python_inc(), ws="include"))
  
  # If running on Windows, find the import library, which is named
  # libs/pythonXY.lib (where (X, Y) == (major, minor)).
  # See: https://docs.python.org/3/extending/windows.html
  # Note that while not strictly a "header" as the rule name implies,
  # this is integral to linking on Windows and parsing the header
  # will require it, so it is included.
  if os.name == "nt":
    implib_basename = "python{major}{minor}.lib".format(
        major=sys.version_info[0], minor=sys.version_info[1])
    implib_abs_path = os.path.join(exec_prefix, "libs", implib_basename)
    if not os.path.exists(implib_abs_path):
      raise RuntimeError("Could not find Windows python import library: %s" %
                         (implib_abs_path,))
    implib_ws_path = "libs/" + implib_basename
    print("# SYMLINK: {abs}\t{ws}".format(abs=implib_abs_path, ws=implib_ws_path))
    extra_srcs.append(implib_ws_path)
  
  print("""
  package(default_visibility = ["//visibility:public"])
  
  config_setting(
      name = "config_windows_any",
      constraint_values = [
          "@platforms//os:windows",
      ],
  )
  
  cc_library(
      name = "python_headers",
      hdrs = glob(["include/*.h"]),
      srcs = [{extra_srcs}],
      includes = ["include"],
      linkopts = [],
  )
  
  """.format(extra_srcs=",".join([json.dumps(s) for s in extra_srcs]),))
  
new_contents: # Copyright 2019 Google LLC
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  # Generates the BUILD file for the python package.
  # It includes special comment lines that instruct the hosting program
  # on how to setup the filesystem.
  # Debugging hint: Just runt his with python to see what it prints.
  """Generates a bazel BUILD file for the repo."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import json
  import os
  import sys
  
  from distutils import sysconfig
  
  extra_srcs = []
  exec_prefix = sys.base_exec_prefix
  
  # Print some directives for the calling starlark program.
  print("# SYMLINK: {abs}\t{ws}".format(
      abs=sysconfig.get_python_inc(), ws="include"))
  
  # If running on Windows, find the import library, which is named
  # libs/pythonXY.lib (where (X, Y) == (major, minor)).
  # See: https://docs.python.org/3/extending/windows.html
  # Note that while not strictly a "header" as the rule name implies,
  # this is integral to linking on Windows and parsing the header
  # will require it, so it is included.
  if os.name == "nt":
    implib_basename = "python{major}{minor}.lib".format(
        major=sys.version_info[0], minor=sys.version_info[1])
    implib_abs_path = os.path.join(exec_prefix, "libs", implib_basename)
    if not os.path.exists(implib_abs_path):
      raise RuntimeError("Could not find Windows python import library: %s" %
                         (implib_abs_path,))
    implib_ws_path = "libs/" + implib_basename
    print("# SYMLINK: {abs}\t{ws}".format(abs=implib_abs_path, ws=implib_ws_path))
    extra_srcs.append(implib_ws_path)
  
  print("""
  package(default_visibility = ["//visibility:public"])
  
  config_setting(
      name = "config_windows_any",
      constraint_values = [
          "@platforms//os:windows",
      ],
  )
  
  cc_library(
      name = "python_headers",
      hdrs = glob(["include/**/*.h"]),
      srcs = [{extra_srcs}],
      includes = ["include"],
      linkopts = [],
  )
  
  """.format(extra_srcs=",".join([json.dumps(s) for s in extra_srcs]),))
  
subject: Include python headers even if nested. (#2669)