runtime/setup.py - 3p/openxla/iree - Git at Google

 # Copyright 2022 The IREE Authors
 #
 # Licensed under the Apache License v2.0 with LLVM Exceptions.
 # See https://llvm.org/LICENSE.txt for license information.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

 # This builds just the runtime API and is relatively quick to build.
 # To install:
 #   pip install .
 # To build a wheel:
 #   pip wheel .
 #
 # It is recommended to build with Ninja and ccache. To do so, set environment
 # variables by prefixing to above invocations:
 #   CMAKE_C_COMPILER_LAUNCHER=ccache CMAKE_CXX_COMPILER_LAUNCHER=ccache
 #
 # On CIs, it is often advantageous to re-use/control the CMake build directory.
 # This can be set with the IREE_RUNTIME_API_CMAKE_BUILD_DIR env var.
 #
 # A custom package suffix can be specified with the environment variable:
 #   IREE_RUNTIME_CUSTOM_PACKAGE_SUFFIX
 #
 # Select CMake options are available from environment variables:
 #   IREE_HAL_DRIVER_CUDA
 #   IREE_HAL_DRIVER_VULKAN
 #   IREE_ENABLE_RUNTIME_TRACING
 #   IREE_BUILD_TRACY
 #   IREE_ENABLE_CPUINFO

 import json
 import os
 import platform
 import re
 import shutil
 import subprocess
 import sys
 import sysconfig
 from distutils.command.build import build as _build
 from gettext import install
 from multiprocessing.spawn import prepare

 from setuptools import Extension, find_namespace_packages, setup
 from setuptools.command.build_ext import build_ext as _build_ext
 from setuptools.command.build_py import build_py as _build_py


 def check_pip_version():
   from packaging import version

   # Pip versions < 22.0.3 default to out of tree builds, which is quite
   # incompatible with what we do (and has other issues). Pip >= 22.0.4
   # removed this option entirely and are only in-tree builds. Since the
   # old behavior can silently produce unworking installations, we aggressively
   # suppress it.
   try:
     import pip
   except ModuleNotFoundError:
     # If pip not installed, we are obviously not trying to package via pip.
     pass
   else:
     if (version.parse(pip.__version__) < version.parse("21.3")):
       print("ERROR: pip version >= 21.3 required")
       print("Upgrade: pip install pip --upgrade")
       sys.exit(2)


 check_pip_version()

 # This file can be run directly from the source tree or it can be CMake
 # configured so it can run from the build tree with an already existing
 # build tree. We detect the difference based on whether the following
 # are expanded by CMake.
 CONFIGURED_SOURCE_DIR = "@IREE_SOURCE_DIR@"
 CONFIGURED_BINARY_DIR = "@IREE_BINARY_DIR@"

 IREE_SOURCE_DIR = None
 IREE_BINARY_DIR = None

 # We must do the intermediate installation to a fixed location that agrees
 # between what we pass to setup() and cmake. So hard-code it here.
 # Note that setup() needs a relative path (to the setup.py file).
 SETUPPY_DIR = os.path.realpath(os.path.dirname(__file__))
 CMAKE_INSTALL_DIR_REL = os.path.join("build", "cmake_install")
 CMAKE_INSTALL_DIR_ABS = os.path.join(SETUPPY_DIR, CMAKE_INSTALL_DIR_REL)

 IS_CONFIGURED = CONFIGURED_SOURCE_DIR[0] != "@"
 if IS_CONFIGURED:
   IREE_SOURCE_DIR = CONFIGURED_SOURCE_DIR
   IREE_BINARY_DIR = CONFIGURED_BINARY_DIR
   print(
       f"Running setup.py from build tree: "
       f"SOURCE_DIR = {IREE_SOURCE_DIR} "
       f"BINARY_DIR = {IREE_BINARY_DIR}",
       file=sys.stderr)
 else:
   IREE_SOURCE_DIR = os.path.join(SETUPPY_DIR, "..")
   IREE_BINARY_DIR = os.getenv("IREE_RUNTIME_API_CMAKE_BUILD_DIR")
   if not IREE_BINARY_DIR:
     # Note that setuptools always builds into a "build" directory that
     # is a sibling of setup.py, so we just colonize a sub-directory of that
     # by default.
     IREE_BINARY_DIR = os.path.join(SETUPPY_DIR, "build", "cmake_build")
   print(
       f"Running setup.py from source tree: "
       f"SOURCE_DIR = {IREE_SOURCE_DIR} "
       f"BINARY_DIR = {IREE_BINARY_DIR}",
       file=sys.stderr)

 # Setup and get version information.
 VERSION_INFO_FILE = os.path.join(IREE_SOURCE_DIR, "version_info.json")


 def load_version_info():
   with open(VERSION_INFO_FILE, "rt") as f:
     return json.load(f)


 def find_git_versions():
   revisions = {}
   try:
     revisions["IREE"] = subprocess.check_output(
         ["git", "rev-parse", "HEAD"],
         cwd=IREE_SOURCE_DIR).decode("utf-8").strip()
   except subprocess.SubprocessError as e:
     print(f"ERROR: Could not get IREE revision: {e}", file=sys.stderr)
   return revisions


 def find_git_submodule_revision(submodule_path):
   try:
     data = subprocess.check_output(["git", "ls-tree", "HEAD", submodule_path],
                                    cwd=IREE_SOURCE_DIR).decode("utf-8").strip()
     columns = re.split("\\s+", data)
     return columns[2]
   except Exception as e:
     print(
         f"ERROR: Could not get submodule revision for {submodule_path}"
         f" ({e})",
         file=sys.stderr)
     return ""


 try:
   version_info = load_version_info()
 except FileNotFoundError:
   print("version_info.json not found. Using defaults", file=sys.stderr)
   version_info = {}
 git_versions = find_git_versions()

 PACKAGE_SUFFIX = version_info.get("package-suffix") or ""
 PACKAGE_VERSION = version_info.get("package-version")
 if not PACKAGE_VERSION:
   PACKAGE_VERSION = f"0.dev0+{git_versions.get('IREE') or '0'}"


 def maybe_nuke_cmake_cache():
   # From run to run under pip, we can end up with different paths to ninja,
   # which isn't great and will confuse cmake. Detect if the location of
   # ninja changes and force a cache flush.
   ninja_path = ""
   try:
     import ninja
   except ModuleNotFoundError:
     pass
   else:
     ninja_path = ninja.__file__
   expected_stamp_contents = f"{sys.executable}\n{ninja_path}"

   # In order to speed things up on CI and not rebuild everything, we nuke
   # the CMakeCache.txt file if the path to the Python interpreter changed.
   # Ideally, CMake would let us reconfigure this dynamically... but it does
   # not (and gets very confused).
   PYTHON_STAMP_FILE = os.path.join(IREE_BINARY_DIR, "python_stamp.txt")
   if os.path.exists(PYTHON_STAMP_FILE):
     with open(PYTHON_STAMP_FILE, "rt") as f:
       actual_stamp_contents = f.read()
       if actual_stamp_contents == expected_stamp_contents:
         # All good.
         return

   # Mismatch or not found. Clean it.
   cmake_cache_file = os.path.join(IREE_BINARY_DIR, "CMakeCache.txt")
   if os.path.exists(cmake_cache_file):
     print("Removing CMakeCache.txt because Python version changed",
           file=sys.stderr)
     os.remove(cmake_cache_file)

   # Also clean the install directory. This avoids version specific pileups
   # of binaries that can occur with repeated builds against different
   # Python versions.
   if os.path.exists(CMAKE_INSTALL_DIR_ABS):
     print(
         f"Removing CMake install dir because Python version changed: "
         f"{CMAKE_INSTALL_DIR_ABS}",
         file=sys.stderr)
     shutil.rmtree(CMAKE_INSTALL_DIR_ABS)

   # And write.
   with open(PYTHON_STAMP_FILE, "wt") as f:
     f.write(expected_stamp_contents)


 def get_env_cmake_option(name: str, default_value: bool = False) -> str:
   svalue = os.getenv(name)
   if not svalue:
     svalue = "ON" if default_value else "OFF"
   return f"-D{name}={svalue}"


 def add_env_cmake_setting(args, env_name: str, cmake_name=None) -> str:
   svalue = os.getenv(env_name)
   if svalue is not None:
     if not cmake_name:
       cmake_name = env_name
     args.append(f"-D{cmake_name}={svalue}")


 def prepare_installation():
   subprocess.check_call(["cmake", "--version"])
   version_py_content = generate_version_py()
   print(f"Generating version.py:\n{version_py_content}", file=sys.stderr)

   if not IS_CONFIGURED:
     # Build from source tree.
     os.makedirs(IREE_BINARY_DIR, exist_ok=True)
     maybe_nuke_cmake_cache()
     print(f"CMake build dir: {IREE_BINARY_DIR}", file=sys.stderr)
     print(f"CMake install dir: {CMAKE_INSTALL_DIR_ABS}", file=sys.stderr)
     cfg = "Release"
     cmake_args = [
         "-GNinja",
         "--log-level=VERBOSE",
         "-DIREE_BUILD_PYTHON_BINDINGS=ON",
         "-DIREE_BUILD_COMPILER=OFF",
         "-DIREE_BUILD_SAMPLES=OFF",
         "-DIREE_BUILD_TESTS=OFF",
         "-DPython3_EXECUTABLE={}".format(sys.executable),
         "-DCMAKE_BUILD_TYPE={}".format(cfg),
         get_env_cmake_option("IREE_HAL_DRIVER_CUDA"),
         get_env_cmake_option("IREE_HAL_DRIVER_VULKAN",
                              "OFF" if platform.system() == "Darwin" else "ON"),
         get_env_cmake_option("IREE_ENABLE_RUNTIME_TRACING"),
         get_env_cmake_option("IREE_BUILD_TRACY"),
         get_env_cmake_option("IREE_ENABLE_CPUINFO", "ON"),
     ]

     # These usually flow through the environment, but we add them explicitly
     # so that they show clearly in logs (getting them wrong can have bad
     # outcomes).
     add_env_cmake_setting(cmake_args, "CMAKE_OSX_ARCHITECTURES")
     add_env_cmake_setting(cmake_args, "MACOSX_DEPLOYMENT_TARGET",
                           "CMAKE_OSX_DEPLOYMENT_TARGET")

     # Only do a from-scratch configure if not already configured.
     cmake_cache_file = os.path.join(IREE_BINARY_DIR, "CMakeCache.txt")
     if not os.path.exists(cmake_cache_file):
       print(f"Configuring with: {cmake_args}", file=sys.stderr)
       subprocess.check_call(["cmake", IREE_SOURCE_DIR] + cmake_args,
                             cwd=IREE_BINARY_DIR)
     else:
       print(f"Not re-configuring (already configured)", file=sys.stderr)

     # Build. Since we have restricted to just the runtime, build everything
     # so as to avoid fragility with more targeted selection criteria.
     subprocess.check_call(["cmake", "--build", "."], cwd=IREE_BINARY_DIR)
     print("Build complete.", file=sys.stderr)

   # Install the component we care about.
   install_args = [
       "-DCMAKE_INSTALL_DO_STRIP=ON",
       f"-DCMAKE_INSTALL_PREFIX={CMAKE_INSTALL_DIR_ABS}/",
       f"-DCMAKE_INSTALL_COMPONENT=IreePythonPackage-runtime",
       "-P",
       os.path.join(IREE_BINARY_DIR, "cmake_install.cmake"),
   ]
   print(f"Installing with: {install_args}", file=sys.stderr)
   subprocess.check_call(["cmake"] + install_args, cwd=IREE_BINARY_DIR)

   # Write version.py directly into install dir.
   version_py_file = os.path.join(CMAKE_INSTALL_DIR_ABS, "python_packages",
                                  "iree_runtime", "iree", "runtime",
                                  "version.py")
   os.makedirs(os.path.dirname(version_py_file), exist_ok=True)
   with open(version_py_file, "wt") as f:
     f.write(version_py_content)

   print(f"Installation prepared: {CMAKE_INSTALL_DIR_ABS}", file=sys.stderr)


 class CMakeBuildPy(_build_py):

   def run(self):
     # It is critical that the target directory contain all built extensions,
     # or else setuptools will helpfully compile an empty binary for us
     # (this is the **worst** possible thing it could do). We just copy
     # everything. What's another hundred megs between friends?
     target_dir = os.path.abspath(self.build_lib)
     print(f"Building in target dir: {target_dir}", file=sys.stderr)
     os.makedirs(target_dir, exist_ok=True)
     print("Copying install to target.", file=sys.stderr)
     if os.path.exists(target_dir):
       shutil.rmtree(target_dir)
     shutil.copytree(os.path.join(CMAKE_INSTALL_DIR_ABS, "python_packages",
                                  "iree_runtime"),
                     target_dir,
                     symlinks=False)
     print("Target populated.", file=sys.stderr)


 class CustomBuild(_build):

   def run(self):
     self.run_command("build_py")
     self.run_command("build_ext")
     self.run_command("build_scripts")


 class CMakeExtension(Extension):

   def __init__(self, name, sourcedir=""):
     Extension.__init__(self, name, sources=[])
     self.sourcedir = os.path.abspath(sourcedir)


 class NoopBuildExtension(_build_ext):

   def __init__(self, *args, **kwargs):
     assert False

   def build_extension(self, ext):
     pass


 def generate_version_py():
   return f"""# Auto-generated version info.
 PACKAGE_SUFFIX = "{PACKAGE_SUFFIX}"
 VERSION = "{PACKAGE_VERSION}"
 REVISIONS = {json.dumps(git_versions)}
 """


 prepare_installation()

 packages = find_namespace_packages(where=os.path.join(CMAKE_INSTALL_DIR_ABS,
                                                       "python_packages",
                                                       "iree_runtime"),
                                    include=[
                                        "iree._runtime",
                                        "iree.runtime",
                                        "iree.runtime.*",
                                    ])
 print(f"Found runtime packages: {packages}")

 with open(
     os.path.join(IREE_SOURCE_DIR, "runtime", "bindings", "python", "iree",
                  "runtime", "README.md"), "rt") as f:
   README = f.read()

 custom_package_suffix = os.getenv("IREE_RUNTIME_CUSTOM_PACKAGE_SUFFIX")
 if not custom_package_suffix:
   custom_package_suffix = ""

 setup(
     name=f"iree-runtime{custom_package_suffix}{PACKAGE_SUFFIX}",
     version=f"{PACKAGE_VERSION}",
     author="IREE Authors",
     author_email="iree-discuss@googlegroups.com",
     description="IREE Python Runtime Components",
     long_description=README,
     long_description_content_type="text/markdown",
     license="Apache-2.0",
     classifiers=[
         "Development Status :: 3 - Alpha",
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
     ],
     url="https://github.com/openxla/iree",
     python_requires=">=3.8",
     ext_modules=[
         CMakeExtension("iree._runtime"),
     ],
     cmdclass={
         "build": CustomBuild,
         "built_ext": NoopBuildExtension,
         "build_py": CMakeBuildPy,
     },
     zip_safe=False,
     package_dir={
         # Note: Must be relative path, so we line this up with the absolute
         # path built above. Note that this must exist prior to the call.
         "": f"{CMAKE_INSTALL_DIR_REL}/python_packages/iree_runtime",
     },
     packages=packages,
     # Matching the native extension as a data file keeps setuptools from
     # "building" it (i.e. turning it into a static binary).
     package_data={
         "": [
             f"*{sysconfig.get_config_var('EXT_SUFFIX')}",
             "iree-run-module*",
             "iree-run-trace*",
             "iree-benchmark-module*",
             "iree-benchmark-trace*",
             "iree-tracy-capture*",
         ],
     },
     entry_points={
         "console_scripts": [
             "iree-run-module = iree.runtime.scripts.iree_run_module.__main__:main",
             "iree-run-trace = iree.runtime.scripts.iree_run_trace.__main__:main",
             "iree-benchmark-module = iree.runtime.scripts.iree_benchmark_module.__main__:main",
             "iree-benchmark-trace = iree.runtime.scripts.iree_benchmark_trace.__main__:main",
             "iree-tracy-capture = iree.runtime.scripts.iree_tracy_capture.__main__:main",
         ],
     },
     install_requires=[
         "numpy",
         "PyYAML",
     ],
 )
	# Copyright 2022 The IREE Authors
	#
	# Licensed under the Apache License v2.0 with LLVM Exceptions.
	# See https://llvm.org/LICENSE.txt for license information.
	# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

	# This builds just the runtime API and is relatively quick to build.
	# To install:
	# pip install .
	# To build a wheel:
	# pip wheel .
	#
	# It is recommended to build with Ninja and ccache. To do so, set environment
	# variables by prefixing to above invocations:
	# CMAKE_C_COMPILER_LAUNCHER=ccache CMAKE_CXX_COMPILER_LAUNCHER=ccache
	#
	# On CIs, it is often advantageous to re-use/control the CMake build directory.
	# This can be set with the IREE_RUNTIME_API_CMAKE_BUILD_DIR env var.
	#
	# A custom package suffix can be specified with the environment variable:
	# IREE_RUNTIME_CUSTOM_PACKAGE_SUFFIX
	#
	# Select CMake options are available from environment variables:
	# IREE_HAL_DRIVER_CUDA
	# IREE_HAL_DRIVER_VULKAN
	# IREE_ENABLE_RUNTIME_TRACING
	# IREE_BUILD_TRACY
	# IREE_ENABLE_CPUINFO

	import json
	import os
	import platform
	import re
	import shutil
	import subprocess
	import sys
	import sysconfig
	from distutils.command.build import build as _build
	from gettext import install
	from multiprocessing.spawn import prepare

	from setuptools import Extension, find_namespace_packages, setup
	from setuptools.command.build_ext import build_ext as _build_ext
	from setuptools.command.build_py import build_py as _build_py


	def check_pip_version():
	from packaging import version

	# Pip versions < 22.0.3 default to out of tree builds, which is quite
	# incompatible with what we do (and has other issues). Pip >= 22.0.4
	# removed this option entirely and are only in-tree builds. Since the
	# old behavior can silently produce unworking installations, we aggressively
	# suppress it.
	try:
	import pip
	except ModuleNotFoundError:
	# If pip not installed, we are obviously not trying to package via pip.
	pass
	else:
	if (version.parse(pip.__version__) < version.parse("21.3")):
	print("ERROR: pip version >= 21.3 required")
	print("Upgrade: pip install pip --upgrade")
	sys.exit(2)


	check_pip_version()

	# This file can be run directly from the source tree or it can be CMake
	# configured so it can run from the build tree with an already existing
	# build tree. We detect the difference based on whether the following
	# are expanded by CMake.
	CONFIGURED_SOURCE_DIR = "@IREE_SOURCE_DIR@"
	CONFIGURED_BINARY_DIR = "@IREE_BINARY_DIR@"

	IREE_SOURCE_DIR = None
	IREE_BINARY_DIR = None

	# We must do the intermediate installation to a fixed location that agrees
	# between what we pass to setup() and cmake. So hard-code it here.
	# Note that setup() needs a relative path (to the setup.py file).
	SETUPPY_DIR = os.path.realpath(os.path.dirname(__file__))
	CMAKE_INSTALL_DIR_REL = os.path.join("build", "cmake_install")
	CMAKE_INSTALL_DIR_ABS = os.path.join(SETUPPY_DIR, CMAKE_INSTALL_DIR_REL)

	IS_CONFIGURED = CONFIGURED_SOURCE_DIR[0] != "@"
	if IS_CONFIGURED:
	IREE_SOURCE_DIR = CONFIGURED_SOURCE_DIR
	IREE_BINARY_DIR = CONFIGURED_BINARY_DIR
	print(
	f"Running setup.py from build tree: "
	f"SOURCE_DIR = {IREE_SOURCE_DIR} "
	f"BINARY_DIR = {IREE_BINARY_DIR}",
	file=sys.stderr)
	else:
	IREE_SOURCE_DIR = os.path.join(SETUPPY_DIR, "..")
	IREE_BINARY_DIR = os.getenv("IREE_RUNTIME_API_CMAKE_BUILD_DIR")
	if not IREE_BINARY_DIR:
	# Note that setuptools always builds into a "build" directory that
	# is a sibling of setup.py, so we just colonize a sub-directory of that
	# by default.
	IREE_BINARY_DIR = os.path.join(SETUPPY_DIR, "build", "cmake_build")
	print(
	f"Running setup.py from source tree: "
	f"SOURCE_DIR = {IREE_SOURCE_DIR} "
	f"BINARY_DIR = {IREE_BINARY_DIR}",
	file=sys.stderr)

	# Setup and get version information.
	VERSION_INFO_FILE = os.path.join(IREE_SOURCE_DIR, "version_info.json")


	def load_version_info():
	with open(VERSION_INFO_FILE, "rt") as f:
	return json.load(f)


	def find_git_versions():
	revisions = {}
	try:
	revisions["IREE"] = subprocess.check_output(
	["git", "rev-parse", "HEAD"],
	cwd=IREE_SOURCE_DIR).decode("utf-8").strip()
	except subprocess.SubprocessError as e:
	print(f"ERROR: Could not get IREE revision: {e}", file=sys.stderr)
	return revisions


	def find_git_submodule_revision(submodule_path):
	try:
	data = subprocess.check_output(["git", "ls-tree", "HEAD", submodule_path],
	cwd=IREE_SOURCE_DIR).decode("utf-8").strip()
	columns = re.split("\\s+", data)
	return columns[2]
	except Exception as e:
	print(
	f"ERROR: Could not get submodule revision for {submodule_path}"
	f" ({e})",
	file=sys.stderr)
	return ""


	try:
	version_info = load_version_info()
	except FileNotFoundError:
	print("version_info.json not found. Using defaults", file=sys.stderr)
	version_info = {}
	git_versions = find_git_versions()

	PACKAGE_SUFFIX = version_info.get("package-suffix") or ""
	PACKAGE_VERSION = version_info.get("package-version")
	if not PACKAGE_VERSION:
	PACKAGE_VERSION = f"0.dev0+{git_versions.get('IREE') or '0'}"


	def maybe_nuke_cmake_cache():
	# From run to run under pip, we can end up with different paths to ninja,
	# which isn't great and will confuse cmake. Detect if the location of
	# ninja changes and force a cache flush.
	ninja_path = ""
	try:
	import ninja
	except ModuleNotFoundError:
	pass
	else:
	ninja_path = ninja.__file__
	expected_stamp_contents = f"{sys.executable}\n{ninja_path}"

	# In order to speed things up on CI and not rebuild everything, we nuke
	# the CMakeCache.txt file if the path to the Python interpreter changed.
	# Ideally, CMake would let us reconfigure this dynamically... but it does
	# not (and gets very confused).
	PYTHON_STAMP_FILE = os.path.join(IREE_BINARY_DIR, "python_stamp.txt")
	if os.path.exists(PYTHON_STAMP_FILE):
	with open(PYTHON_STAMP_FILE, "rt") as f:
	actual_stamp_contents = f.read()
	if actual_stamp_contents == expected_stamp_contents:
	# All good.
	return

	# Mismatch or not found. Clean it.
	cmake_cache_file = os.path.join(IREE_BINARY_DIR, "CMakeCache.txt")
	if os.path.exists(cmake_cache_file):
	print("Removing CMakeCache.txt because Python version changed",
	file=sys.stderr)
	os.remove(cmake_cache_file)

	# Also clean the install directory. This avoids version specific pileups
	# of binaries that can occur with repeated builds against different
	# Python versions.
	if os.path.exists(CMAKE_INSTALL_DIR_ABS):
	print(
	f"Removing CMake install dir because Python version changed: "
	f"{CMAKE_INSTALL_DIR_ABS}",
	file=sys.stderr)
	shutil.rmtree(CMAKE_INSTALL_DIR_ABS)

	# And write.
	with open(PYTHON_STAMP_FILE, "wt") as f:
	f.write(expected_stamp_contents)


	def get_env_cmake_option(name: str, default_value: bool = False) -> str:
	svalue = os.getenv(name)
	if not svalue:
	svalue = "ON" if default_value else "OFF"
	return f"-D{name}={svalue}"


	def add_env_cmake_setting(args, env_name: str, cmake_name=None) -> str:
	svalue = os.getenv(env_name)
	if svalue is not None:
	if not cmake_name:
	cmake_name = env_name
	args.append(f"-D{cmake_name}={svalue}")


	def prepare_installation():
	subprocess.check_call(["cmake", "--version"])
	version_py_content = generate_version_py()
	print(f"Generating version.py:\n{version_py_content}", file=sys.stderr)

	if not IS_CONFIGURED:
	# Build from source tree.
	os.makedirs(IREE_BINARY_DIR, exist_ok=True)
	maybe_nuke_cmake_cache()
	print(f"CMake build dir: {IREE_BINARY_DIR}", file=sys.stderr)
	print(f"CMake install dir: {CMAKE_INSTALL_DIR_ABS}", file=sys.stderr)
	cfg = "Release"
	cmake_args = [
	"-GNinja",
	"--log-level=VERBOSE",
	"-DIREE_BUILD_PYTHON_BINDINGS=ON",
	"-DIREE_BUILD_COMPILER=OFF",
	"-DIREE_BUILD_SAMPLES=OFF",
	"-DIREE_BUILD_TESTS=OFF",
	"-DPython3_EXECUTABLE={}".format(sys.executable),
	"-DCMAKE_BUILD_TYPE={}".format(cfg),
	get_env_cmake_option("IREE_HAL_DRIVER_CUDA"),
	get_env_cmake_option("IREE_HAL_DRIVER_VULKAN",
	"OFF" if platform.system() == "Darwin" else "ON"),
	get_env_cmake_option("IREE_ENABLE_RUNTIME_TRACING"),
	get_env_cmake_option("IREE_BUILD_TRACY"),
	get_env_cmake_option("IREE_ENABLE_CPUINFO", "ON"),
	]

	# These usually flow through the environment, but we add them explicitly
	# so that they show clearly in logs (getting them wrong can have bad
	# outcomes).
	add_env_cmake_setting(cmake_args, "CMAKE_OSX_ARCHITECTURES")
	add_env_cmake_setting(cmake_args, "MACOSX_DEPLOYMENT_TARGET",
	"CMAKE_OSX_DEPLOYMENT_TARGET")

	# Only do a from-scratch configure if not already configured.
	cmake_cache_file = os.path.join(IREE_BINARY_DIR, "CMakeCache.txt")
	if not os.path.exists(cmake_cache_file):
	print(f"Configuring with: {cmake_args}", file=sys.stderr)
	subprocess.check_call(["cmake", IREE_SOURCE_DIR] + cmake_args,
	cwd=IREE_BINARY_DIR)
	else:
	print(f"Not re-configuring (already configured)", file=sys.stderr)

	# Build. Since we have restricted to just the runtime, build everything
	# so as to avoid fragility with more targeted selection criteria.
	subprocess.check_call(["cmake", "--build", "."], cwd=IREE_BINARY_DIR)
	print("Build complete.", file=sys.stderr)

	# Install the component we care about.
	install_args = [
	"-DCMAKE_INSTALL_DO_STRIP=ON",
	f"-DCMAKE_INSTALL_PREFIX={CMAKE_INSTALL_DIR_ABS}/",
	f"-DCMAKE_INSTALL_COMPONENT=IreePythonPackage-runtime",
	"-P",
	os.path.join(IREE_BINARY_DIR, "cmake_install.cmake"),
	]
	print(f"Installing with: {install_args}", file=sys.stderr)
	subprocess.check_call(["cmake"] + install_args, cwd=IREE_BINARY_DIR)

	# Write version.py directly into install dir.
	version_py_file = os.path.join(CMAKE_INSTALL_DIR_ABS, "python_packages",
	"iree_runtime", "iree", "runtime",
	"version.py")
	os.makedirs(os.path.dirname(version_py_file), exist_ok=True)
	with open(version_py_file, "wt") as f:
	f.write(version_py_content)

	print(f"Installation prepared: {CMAKE_INSTALL_DIR_ABS}", file=sys.stderr)


	class CMakeBuildPy(_build_py):

	def run(self):
	# It is critical that the target directory contain all built extensions,
	# or else setuptools will helpfully compile an empty binary for us
	# (this is the worst possible thing it could do). We just copy
	# everything. What's another hundred megs between friends?
	target_dir = os.path.abspath(self.build_lib)
	print(f"Building in target dir: {target_dir}", file=sys.stderr)
	os.makedirs(target_dir, exist_ok=True)
	print("Copying install to target.", file=sys.stderr)
	if os.path.exists(target_dir):
	shutil.rmtree(target_dir)
	shutil.copytree(os.path.join(CMAKE_INSTALL_DIR_ABS, "python_packages",
	"iree_runtime"),
	target_dir,
	symlinks=False)
	print("Target populated.", file=sys.stderr)


	class CustomBuild(_build):

	def run(self):
	self.run_command("build_py")
	self.run_command("build_ext")
	self.run_command("build_scripts")


	class CMakeExtension(Extension):

	def __init__(self, name, sourcedir=""):
	Extension.__init__(self, name, sources=[])
	self.sourcedir = os.path.abspath(sourcedir)


	class NoopBuildExtension(_build_ext):

	def __init__(self, args, *kwargs):
	assert False

	def build_extension(self, ext):
	pass


	def generate_version_py():
	return f"""# Auto-generated version info.
	PACKAGE_SUFFIX = "{PACKAGE_SUFFIX}"
	VERSION = "{PACKAGE_VERSION}"
	REVISIONS = {json.dumps(git_versions)}
	"""


	prepare_installation()

	packages = find_namespace_packages(where=os.path.join(CMAKE_INSTALL_DIR_ABS,
	"python_packages",
	"iree_runtime"),
	include=[
	"iree._runtime",
	"iree.runtime",
	"iree.runtime.*",
	])
	print(f"Found runtime packages: {packages}")

	with open(
	os.path.join(IREE_SOURCE_DIR, "runtime", "bindings", "python", "iree",
	"runtime", "README.md"), "rt") as f:
	README = f.read()

	custom_package_suffix = os.getenv("IREE_RUNTIME_CUSTOM_PACKAGE_SUFFIX")
	if not custom_package_suffix:
	custom_package_suffix = ""

	setup(
	name=f"iree-runtime{custom_package_suffix}{PACKAGE_SUFFIX}",
	version=f"{PACKAGE_VERSION}",
	author="IREE Authors",
	author_email="iree-discuss@googlegroups.com",
	description="IREE Python Runtime Components",
	long_description=README,
	long_description_content_type="text/markdown",
	license="Apache-2.0",
	classifiers=[
	"Development Status :: 3 - Alpha",
	"License :: OSI Approved :: Apache Software License",
	"Programming Language :: Python :: 3",
	"Programming Language :: Python :: 3.8",
	"Programming Language :: Python :: 3.9",
	"Programming Language :: Python :: 3.10",
	"Programming Language :: Python :: 3.11",
	],
	url="https://github.com/openxla/iree",
	python_requires=">=3.8",
	ext_modules=[
	CMakeExtension("iree._runtime"),
	],
	cmdclass={
	"build": CustomBuild,
	"built_ext": NoopBuildExtension,
	"build_py": CMakeBuildPy,
	},
	zip_safe=False,
	package_dir={
	# Note: Must be relative path, so we line this up with the absolute
	# path built above. Note that this must exist prior to the call.
	"": f"{CMAKE_INSTALL_DIR_REL}/python_packages/iree_runtime",
	},
	packages=packages,
	# Matching the native extension as a data file keeps setuptools from
	# "building" it (i.e. turning it into a static binary).
	package_data={
	"": [
	f"*{sysconfig.get_config_var('EXT_SUFFIX')}",
	"iree-run-module*",
	"iree-run-trace*",
	"iree-benchmark-module*",
	"iree-benchmark-trace*",
	"iree-tracy-capture*",
	],
	},
	entry_points={
	"console_scripts": [
	"iree-run-module = iree.runtime.scripts.iree_run_module.__main__:main",
	"iree-run-trace = iree.runtime.scripts.iree_run_trace.__main__:main",
	"iree-benchmark-module = iree.runtime.scripts.iree_benchmark_module.__main__:main",
	"iree-benchmark-trace = iree.runtime.scripts.iree_benchmark_trace.__main__:main",
	"iree-tracy-capture = iree.runtime.scripts.iree_tracy_capture.__main__:main",
	],
	},
	install_requires=[
	"numpy",
	"PyYAML",
	],
	)