src/python/grpcio/commands.py - third_party/grpc - Git at Google

 # Copyright 2015 gRPC authors.
 #
 # 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
 #
 #     http://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.
 """Provides distutils command classes for the GRPC Python setup process."""

 # NOTE(https://github.com/grpc/grpc/issues/24028): allow setuptools to monkey
 # patch distutils
 import setuptools  # isort:skip

 import glob
 import os
 import os.path
 import shutil
 import subprocess
 import sys
 import sysconfig
 import traceback

 from setuptools.command import build_ext
 from setuptools.command import build_py
 import support

 PYTHON_STEM = os.path.dirname(os.path.abspath(__file__))
 GRPC_STEM = os.path.abspath(PYTHON_STEM + "../../../../")
 PROTO_STEM = os.path.join(GRPC_STEM, "src", "proto")
 PROTO_GEN_STEM = os.path.join(GRPC_STEM, "src", "python", "gens")
 CYTHON_STEM = os.path.join(PYTHON_STEM, "grpc", "_cython")


 class CommandError(Exception):
     """Simple exception class for GRPC custom commands."""


 # TODO(atash): Remove this once PyPI has better Linux bdist support. See
 # https://bitbucket.org/pypa/pypi/issues/120/binary-wheels-for-linux-are-not-supported
 def _get_grpc_custom_bdist(decorated_basename, target_bdist_basename):
     """Returns a string path to a bdist file for Linux to install.

     If we can retrieve a pre-compiled bdist from online, uses it. Else, emits a
     warning and builds from source.
     """
     # TODO(atash): somehow the name that's returned from `wheel` is different
     # between different versions of 'wheel' (but from a compatibility standpoint,
     # the names are compatible); we should have some way of determining name
     # compatibility in the same way `wheel` does to avoid having to rename all of
     # the custom wheels that we build/upload to GCS.

     # Break import style to ensure that setup.py has had a chance to install the
     # relevant package.
     from urllib import request

     decorated_path = decorated_basename + GRPC_CUSTOM_BDIST_EXT
     try:
         url = BINARIES_REPOSITORY + "/{target}".format(target=decorated_path)
         bdist_data = request.urlopen(url).read()
     except IOError as error:
         raise CommandError(
             "{}\n\nCould not find the bdist {}: {}".format(
                 traceback.format_exc(), decorated_path, error.message
             )
         )
     # Our chosen local bdist path.
     bdist_path = target_bdist_basename + GRPC_CUSTOM_BDIST_EXT
     try:
         with open(bdist_path, "w") as bdist_file:
             bdist_file.write(bdist_data)
     except IOError as error:
         raise CommandError(
             "{}\n\nCould not write grpcio bdist: {}".format(
                 traceback.format_exc(), error.message
             )
         )
     return bdist_path


 class SphinxDocumentation(setuptools.Command):
     """Command to generate documentation via sphinx."""

     description = "generate sphinx documentation"
     user_options = []

     def initialize_options(self):
         pass

     def finalize_options(self):
         pass

     def run(self):
         # We import here to ensure that setup.py has had a chance to install the
         # relevant package eggs first.
         import sphinx.cmd.build

         source_dir = os.path.join(GRPC_STEM, "doc", "python", "sphinx")
         target_dir = os.path.join(GRPC_STEM, "doc", "build")
         exit_code = sphinx.cmd.build.build_main(
             ["-b", "html", "-W", "--keep-going", source_dir, target_dir]
         )
         if exit_code != 0:
             raise CommandError(
                 "Documentation generation has warnings or errors"
             )


 class BuildProjectMetadata(setuptools.Command):
     """Command to generate project metadata in a module."""

     description = "build grpcio project metadata files"
     user_options = []

     def initialize_options(self):
         pass

     def finalize_options(self):
         pass

     def run(self):
         with open(
             os.path.join(PYTHON_STEM, "grpc/_grpcio_metadata.py"), "w"
         ) as module_file:
             module_file.write(
                 '__version__ = """{}"""'.format(self.distribution.get_version())
             )


 class BuildPy(build_py.build_py):
     """Custom project build command."""

     def run(self):
         self.run_command("build_project_metadata")
         build_py.build_py.run(self)


 def _poison_extensions(extensions, message):
     """Includes a file that will always fail to compile in all extensions."""
     poison_filename = os.path.join(PYTHON_STEM, "poison.c")
     with open(poison_filename, "w") as poison:
         poison.write("#error {}".format(message))
     for extension in extensions:
         extension.sources = [poison_filename]


 def check_and_update_cythonization(extensions):
     """Replace .pyx files with their generated counterparts and return whether or
     not cythonization still needs to occur."""
     for extension in extensions:
         generated_pyx_sources = []
         other_sources = []
         for source in extension.sources:
             base, file_ext = os.path.splitext(source)
             if file_ext == ".pyx":
                 generated_pyx_source = next(
                     (
                         base + gen_ext
                         for gen_ext in (
                             ".c",
                             ".cpp",
                         )
                         if os.path.isfile(base + gen_ext)
                     ),
                     None,
                 )
                 if generated_pyx_source:
                     generated_pyx_sources.append(generated_pyx_source)
                 else:
                     sys.stderr.write("Cython-generated files are missing...\n")
                     return False
             else:
                 other_sources.append(source)
         extension.sources = generated_pyx_sources + other_sources
     sys.stderr.write("Found cython-generated files...\n")
     return True


 def try_cythonize(extensions, linetracing=False, mandatory=True):
     """Attempt to cythonize the extensions.

     Args:
       extensions: A list of `distutils.extension.Extension`.
       linetracing: A bool indicating whether or not to enable linetracing.
       mandatory: Whether or not having Cython-generated files is mandatory. If it
         is, extensions will be poisoned when they can't be fully generated.
     """
     try:
         # Break import style to ensure we have access to Cython post-setup_requires
         import Cython.Build
     except ImportError:
         if mandatory:
             sys.stderr.write(
                 "This package needs to generate C files with Cython but it"
                 " cannot. Poisoning extension sources to disallow extension"
                 " commands..."
             )
             _poison_extensions(
                 extensions,
                 (
                     "Extensions have been poisoned due to missing"
                     " Cython-generated code."
                 ),
             )
         return extensions
     cython_compiler_directives = {}
     if linetracing:
         additional_define_macros = [("CYTHON_TRACE_NOGIL", "1")]
         cython_compiler_directives["linetrace"] = True
     return Cython.Build.cythonize(
         extensions,
         include_path=[
             include_dir
             for extension in extensions
             for include_dir in extension.include_dirs
         ]
         + [CYTHON_STEM],
         compiler_directives=cython_compiler_directives,
     )


 class BuildExt(build_ext.build_ext):
     """Custom build_ext command to enable compiler-specific flags."""

     C_OPTIONS = {
         "unix": ("-pthread",),
         "msvc": (),
     }
     LINK_OPTIONS = {}

     def get_ext_filename(self, ext_name):
         # since python3.5, python extensions' shared libraries use a suffix that corresponds to the value
         # of sysconfig.get_config_var('EXT_SUFFIX') and contains info about the architecture the library targets.
         # E.g. on x64 linux the suffix is ".cpython-XYZ-x86_64-linux-gnu.so"
         # When crosscompiling python wheels, we need to be able to override this suffix
         # so that the resulting file name matches the target architecture and we end up with a well-formed
         # wheel.
         filename = build_ext.build_ext.get_ext_filename(self, ext_name)
         orig_ext_suffix = sysconfig.get_config_var("EXT_SUFFIX")
         new_ext_suffix = os.getenv("GRPC_PYTHON_OVERRIDE_EXT_SUFFIX")
         if new_ext_suffix and filename.endswith(orig_ext_suffix):
             filename = filename[: -len(orig_ext_suffix)] + new_ext_suffix
         return filename

     def build_extensions(self):
         def compiler_ok_with_extra_std():
             """Test if default compiler is okay with specifying c++ version
             when invoked in C mode. GCC is okay with this, while clang is not.
             """
             try:
                 # TODO(lidiz) Remove the generated a.out for success tests.
                 cc = os.environ.get("CC", "cc")
                 cc_test = subprocess.Popen(
                     [cc, "-x", "c", "-std=c++14", "-"],
                     stdin=subprocess.PIPE,
                     stdout=subprocess.PIPE,
                     stderr=subprocess.PIPE,
                 )
                 _, cc_err = cc_test.communicate(input=b"int main(){return 0;}")
                 return not "invalid argument" in str(cc_err)
             except:
                 sys.stderr.write(
                     "Non-fatal exception:" + traceback.format_exc() + "\n"
                 )
                 return False

         # This special conditioning is here due to difference of compiler
         #   behavior in gcc and clang. The clang doesn't take --stdc++11
         #   flags but gcc does. Since the setuptools of Python only support
         #   all C or all C++ compilation, the mix of C and C++ will crash.
         #   *By default*, macOS and FreBSD use clang and Linux use gcc
         #
         #   If we are not using a permissive compiler that's OK with being
         #   passed wrong std flags, swap out compile function by adding a filter
         #   for it.
         if not compiler_ok_with_extra_std():
             old_compile = self.compiler._compile

             def new_compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
                 if src.endswith(".c"):
                     extra_postargs = [
                         arg for arg in extra_postargs if not "-std=c++" in arg
                     ]
                 elif src.endswith(".cc") or src.endswith(".cpp"):
                     extra_postargs = [
                         arg for arg in extra_postargs if not "-std=gnu99" in arg
                     ]
                 return old_compile(
                     obj, src, ext, cc_args, extra_postargs, pp_opts
                 )

             self.compiler._compile = new_compile

         compiler = self.compiler.compiler_type
         if compiler in BuildExt.C_OPTIONS:
             for extension in self.extensions:
                 extension.extra_compile_args += list(
                     BuildExt.C_OPTIONS[compiler]
                 )
         if compiler in BuildExt.LINK_OPTIONS:
             for extension in self.extensions:
                 extension.extra_link_args += list(
                     BuildExt.LINK_OPTIONS[compiler]
                 )
         if not check_and_update_cythonization(self.extensions):
             self.extensions = try_cythonize(self.extensions)
         try:
             build_ext.build_ext.build_extensions(self)
         except Exception as error:
             formatted_exception = traceback.format_exc()
             support.diagnose_build_ext_error(self, error, formatted_exception)
             raise CommandError(
                 "Failed `build_ext` step:\n{}".format(formatted_exception)
             )


 class Gather(setuptools.Command):
     """Command to gather project dependencies."""

     description = "gather dependencies for grpcio"
     user_options = [
         ("test", "t", "flag indicating to gather test dependencies"),
         ("install", "i", "flag indicating to gather install dependencies"),
     ]

     def initialize_options(self):
         self.test = False
         self.install = False

     def finalize_options(self):
         # distutils requires this override.
         pass

     def run(self):
         if self.install and self.distribution.install_requires:
             self.distribution.fetch_build_eggs(
                 self.distribution.install_requires
             )
         if self.test and self.distribution.tests_require:
             self.distribution.fetch_build_eggs(self.distribution.tests_require)


 class Clean(setuptools.Command):
     """Command to clean build artifacts."""

     description = "Clean build artifacts."
     user_options = [
         ("all", "a", "a phony flag to allow our script to continue"),
     ]

     _FILE_PATTERNS = (
         "python_build",
         "src/python/grpcio/__pycache__/",
         "src/python/grpcio/grpc/_cython/cygrpc.cpp",
         "src/python/grpcio/grpc/_cython/*.so",
         "src/python/grpcio/grpcio.egg-info/",
     )
     _CURRENT_DIRECTORY = os.path.normpath(
         os.path.join(os.path.dirname(os.path.realpath(__file__)), "../../..")
     )

     def initialize_options(self):
         self.all = False

     def finalize_options(self):
         pass

     def run(self):
         for path_spec in self._FILE_PATTERNS:
             this_glob = os.path.normpath(
                 os.path.join(Clean._CURRENT_DIRECTORY, path_spec)
             )
             abs_paths = glob.glob(this_glob)
             for path in abs_paths:
                 if not str(path).startswith(Clean._CURRENT_DIRECTORY):
                     raise ValueError(
                         "Cowardly refusing to delete {}.".format(path)
                     )
                 print("Removing {}".format(os.path.relpath(path)))
                 if os.path.isfile(path):
                     os.remove(str(path))
                 else:
                     shutil.rmtree(str(path))
	# Copyright 2015 gRPC authors.
	#
	# 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
	#
	# http://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.
	"""Provides distutils command classes for the GRPC Python setup process."""

	# NOTE(https://github.com/grpc/grpc/issues/24028): allow setuptools to monkey
	# patch distutils
	import setuptools # isort:skip

	import glob
	import os
	import os.path
	import shutil
	import subprocess
	import sys
	import sysconfig
	import traceback

	from setuptools.command import build_ext
	from setuptools.command import build_py
	import support

	PYTHON_STEM = os.path.dirname(os.path.abspath(__file__))
	GRPC_STEM = os.path.abspath(PYTHON_STEM + "../../../../")
	PROTO_STEM = os.path.join(GRPC_STEM, "src", "proto")
	PROTO_GEN_STEM = os.path.join(GRPC_STEM, "src", "python", "gens")
	CYTHON_STEM = os.path.join(PYTHON_STEM, "grpc", "_cython")


	class CommandError(Exception):
	"""Simple exception class for GRPC custom commands."""


	# TODO(atash): Remove this once PyPI has better Linux bdist support. See
	# https://bitbucket.org/pypa/pypi/issues/120/binary-wheels-for-linux-are-not-supported
	def _get_grpc_custom_bdist(decorated_basename, target_bdist_basename):
	"""Returns a string path to a bdist file for Linux to install.

	If we can retrieve a pre-compiled bdist from online, uses it. Else, emits a
	warning and builds from source.
	"""
	# TODO(atash): somehow the name that's returned from `wheel` is different
	# between different versions of 'wheel' (but from a compatibility standpoint,
	# the names are compatible); we should have some way of determining name
	# compatibility in the same way `wheel` does to avoid having to rename all of
	# the custom wheels that we build/upload to GCS.

	# Break import style to ensure that setup.py has had a chance to install the
	# relevant package.
	from urllib import request

	decorated_path = decorated_basename + GRPC_CUSTOM_BDIST_EXT
	try:
	url = BINARIES_REPOSITORY + "/{target}".format(target=decorated_path)
	bdist_data = request.urlopen(url).read()
	except IOError as error:
	raise CommandError(
	"{}\n\nCould not find the bdist {}: {}".format(
	traceback.format_exc(), decorated_path, error.message
	)
	)
	# Our chosen local bdist path.
	bdist_path = target_bdist_basename + GRPC_CUSTOM_BDIST_EXT
	try:
	with open(bdist_path, "w") as bdist_file:
	bdist_file.write(bdist_data)
	except IOError as error:
	raise CommandError(
	"{}\n\nCould not write grpcio bdist: {}".format(
	traceback.format_exc(), error.message
	)
	)
	return bdist_path


	class SphinxDocumentation(setuptools.Command):
	"""Command to generate documentation via sphinx."""

	description = "generate sphinx documentation"
	user_options = []

	def initialize_options(self):
	pass

	def finalize_options(self):
	pass

	def run(self):
	# We import here to ensure that setup.py has had a chance to install the
	# relevant package eggs first.
	import sphinx.cmd.build

	source_dir = os.path.join(GRPC_STEM, "doc", "python", "sphinx")
	target_dir = os.path.join(GRPC_STEM, "doc", "build")
	exit_code = sphinx.cmd.build.build_main(
	["-b", "html", "-W", "--keep-going", source_dir, target_dir]
	)
	if exit_code != 0:
	raise CommandError(
	"Documentation generation has warnings or errors"
	)


	class BuildProjectMetadata(setuptools.Command):
	"""Command to generate project metadata in a module."""

	description = "build grpcio project metadata files"
	user_options = []

	def initialize_options(self):
	pass

	def finalize_options(self):
	pass

	def run(self):
	with open(
	os.path.join(PYTHON_STEM, "grpc/_grpcio_metadata.py"), "w"
	) as module_file:
	module_file.write(
	'__version__ = """{}"""'.format(self.distribution.get_version())
	)


	class BuildPy(build_py.build_py):
	"""Custom project build command."""

	def run(self):
	self.run_command("build_project_metadata")
	build_py.build_py.run(self)


	def _poison_extensions(extensions, message):
	"""Includes a file that will always fail to compile in all extensions."""
	poison_filename = os.path.join(PYTHON_STEM, "poison.c")
	with open(poison_filename, "w") as poison:
	poison.write("#error {}".format(message))
	for extension in extensions:
	extension.sources = [poison_filename]


	def check_and_update_cythonization(extensions):
	"""Replace .pyx files with their generated counterparts and return whether or
	not cythonization still needs to occur."""
	for extension in extensions:
	generated_pyx_sources = []
	other_sources = []
	for source in extension.sources:
	base, file_ext = os.path.splitext(source)
	if file_ext == ".pyx":
	generated_pyx_source = next(
	(
	base + gen_ext
	for gen_ext in (
	".c",
	".cpp",
	)
	if os.path.isfile(base + gen_ext)
	),
	None,
	)
	if generated_pyx_source:
	generated_pyx_sources.append(generated_pyx_source)
	else:
	sys.stderr.write("Cython-generated files are missing...\n")
	return False
	else:
	other_sources.append(source)
	extension.sources = generated_pyx_sources + other_sources
	sys.stderr.write("Found cython-generated files...\n")
	return True


	def try_cythonize(extensions, linetracing=False, mandatory=True):
	"""Attempt to cythonize the extensions.

	Args:
	extensions: A list of `distutils.extension.Extension`.
	linetracing: A bool indicating whether or not to enable linetracing.
	mandatory: Whether or not having Cython-generated files is mandatory. If it
	is, extensions will be poisoned when they can't be fully generated.
	"""
	try:
	# Break import style to ensure we have access to Cython post-setup_requires
	import Cython.Build
	except ImportError:
	if mandatory:
	sys.stderr.write(
	"This package needs to generate C files with Cython but it"
	" cannot. Poisoning extension sources to disallow extension"
	" commands..."
	)
	_poison_extensions(
	extensions,
	(
	"Extensions have been poisoned due to missing"
	" Cython-generated code."
	),
	)
	return extensions
	cython_compiler_directives = {}
	if linetracing:
	additional_define_macros = [("CYTHON_TRACE_NOGIL", "1")]
	cython_compiler_directives["linetrace"] = True
	return Cython.Build.cythonize(
	extensions,
	include_path=[
	include_dir
	for extension in extensions
	for include_dir in extension.include_dirs
	]
	+ [CYTHON_STEM],
	compiler_directives=cython_compiler_directives,
	)


	class BuildExt(build_ext.build_ext):
	"""Custom build_ext command to enable compiler-specific flags."""

	C_OPTIONS = {
	"unix": ("-pthread",),
	"msvc": (),
	}
	LINK_OPTIONS = {}

	def get_ext_filename(self, ext_name):
	# since python3.5, python extensions' shared libraries use a suffix that corresponds to the value
	# of sysconfig.get_config_var('EXT_SUFFIX') and contains info about the architecture the library targets.
	# E.g. on x64 linux the suffix is ".cpython-XYZ-x86_64-linux-gnu.so"
	# When crosscompiling python wheels, we need to be able to override this suffix
	# so that the resulting file name matches the target architecture and we end up with a well-formed
	# wheel.
	filename = build_ext.build_ext.get_ext_filename(self, ext_name)
	orig_ext_suffix = sysconfig.get_config_var("EXT_SUFFIX")
	new_ext_suffix = os.getenv("GRPC_PYTHON_OVERRIDE_EXT_SUFFIX")
	if new_ext_suffix and filename.endswith(orig_ext_suffix):
	filename = filename[: -len(orig_ext_suffix)] + new_ext_suffix
	return filename

	def build_extensions(self):
	def compiler_ok_with_extra_std():
	"""Test if default compiler is okay with specifying c++ version
	when invoked in C mode. GCC is okay with this, while clang is not.
	"""
	try:
	# TODO(lidiz) Remove the generated a.out for success tests.
	cc = os.environ.get("CC", "cc")
	cc_test = subprocess.Popen(
	[cc, "-x", "c", "-std=c++14", "-"],
	stdin=subprocess.PIPE,
	stdout=subprocess.PIPE,
	stderr=subprocess.PIPE,
	)
	_, cc_err = cc_test.communicate(input=b"int main(){return 0;}")
	return not "invalid argument" in str(cc_err)
	except:
	sys.stderr.write(
	"Non-fatal exception:" + traceback.format_exc() + "\n"
	)
	return False

	# This special conditioning is here due to difference of compiler
	# behavior in gcc and clang. The clang doesn't take --stdc++11
	# flags but gcc does. Since the setuptools of Python only support
	# all C or all C++ compilation, the mix of C and C++ will crash.
	# By default, macOS and FreBSD use clang and Linux use gcc
	#
	# If we are not using a permissive compiler that's OK with being
	# passed wrong std flags, swap out compile function by adding a filter
	# for it.
	if not compiler_ok_with_extra_std():
	old_compile = self.compiler._compile

	def new_compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
	if src.endswith(".c"):
	extra_postargs = [
	arg for arg in extra_postargs if not "-std=c++" in arg
	]
	elif src.endswith(".cc") or src.endswith(".cpp"):
	extra_postargs = [
	arg for arg in extra_postargs if not "-std=gnu99" in arg
	]
	return old_compile(
	obj, src, ext, cc_args, extra_postargs, pp_opts
	)

	self.compiler._compile = new_compile

	compiler = self.compiler.compiler_type
	if compiler in BuildExt.C_OPTIONS:
	for extension in self.extensions:
	extension.extra_compile_args += list(
	BuildExt.C_OPTIONS[compiler]
	)
	if compiler in BuildExt.LINK_OPTIONS:
	for extension in self.extensions:
	extension.extra_link_args += list(
	BuildExt.LINK_OPTIONS[compiler]
	)
	if not check_and_update_cythonization(self.extensions):
	self.extensions = try_cythonize(self.extensions)
	try:
	build_ext.build_ext.build_extensions(self)
	except Exception as error:
	formatted_exception = traceback.format_exc()
	support.diagnose_build_ext_error(self, error, formatted_exception)
	raise CommandError(
	"Failed `build_ext` step:\n{}".format(formatted_exception)
	)


	class Gather(setuptools.Command):
	"""Command to gather project dependencies."""

	description = "gather dependencies for grpcio"
	user_options = [
	("test", "t", "flag indicating to gather test dependencies"),
	("install", "i", "flag indicating to gather install dependencies"),
	]

	def initialize_options(self):
	self.test = False
	self.install = False

	def finalize_options(self):
	# distutils requires this override.
	pass

	def run(self):
	if self.install and self.distribution.install_requires:
	self.distribution.fetch_build_eggs(
	self.distribution.install_requires
	)
	if self.test and self.distribution.tests_require:
	self.distribution.fetch_build_eggs(self.distribution.tests_require)


	class Clean(setuptools.Command):
	"""Command to clean build artifacts."""

	description = "Clean build artifacts."
	user_options = [
	("all", "a", "a phony flag to allow our script to continue"),
	]

	_FILE_PATTERNS = (
	"python_build",
	"src/python/grpcio/__pycache__/",
	"src/python/grpcio/grpc/_cython/cygrpc.cpp",
	"src/python/grpcio/grpc/_cython/*.so",
	"src/python/grpcio/grpcio.egg-info/",
	)
	_CURRENT_DIRECTORY = os.path.normpath(
	os.path.join(os.path.dirname(os.path.realpath(__file__)), "../../..")
	)

	def initialize_options(self):
	self.all = False

	def finalize_options(self):
	pass

	def run(self):
	for path_spec in self._FILE_PATTERNS:
	this_glob = os.path.normpath(
	os.path.join(Clean._CURRENT_DIRECTORY, path_spec)
	)
	abs_paths = glob.glob(this_glob)
	for path in abs_paths:
	if not str(path).startswith(Clean._CURRENT_DIRECTORY):
	raise ValueError(
	"Cowardly refusing to delete {}.".format(path)
	)
	print("Removing {}".format(os.path.relpath(path)))
	if os.path.isfile(path):
	os.remove(str(path))
	else:
	shutil.rmtree(str(path))