onnxruntime/tools/ci_build/build.py

#!/usr/bin/env python3
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.

import argparse
import fileinput
import getpass
import glob
import logging
import multiprocessing
import os
import platform
import re
import shutil
import subprocess
import sys
import warnings
import hashlib
from os.path import expanduser

logging.basicConfig(format="%(asctime)s %(name)s [%(levelname)s] - %(message)s", level=logging.DEBUG)
log = logging.getLogger("Build")

class BaseError(Exception):
    """Base class for errors originating from build.py."""
    pass

class BuildError(BaseError):
    """Error from running build steps."""
    def __init__(self, *messages):
        super().__init__("\n".join(messages))

class UsageError(BaseError):
    """Usage related error."""
    def __init__(self, message):
        super().__init__(message)

def parse_arguments():
    parser = argparse.ArgumentParser(description="ONNXRuntime CI build driver.",
                                     usage='''
Default behavior is --update --build --test for native architecture builds.
Default behavior is --update --build for cross-compiled builds.

The Update phase will update git submodules, and run cmake to generate makefiles.
The Build phase will build all projects.
The Test phase will run all unit tests, and optionally the ONNX tests.

Use the individual flags to only run the specified stages.
                                     ''')
    # Main arguments
    parser.add_argument("--build_dir", required=True, help="Path to the build directory.")
    parser.add_argument("--config", nargs="+", default=["Debug"],
                        choices=["Debug", "MinSizeRel", "Release", "RelWithDebInfo"],
                        help="Configuration(s) to build.")
    parser.add_argument("--update", action='store_true', help="Update makefiles.")
    parser.add_argument("--build", action='store_true', help="Build.")
    parser.add_argument("--clean", action='store_true', help="Run 'cmake --build --target clean' for the selected config/s.")
    parser.add_argument("--parallel", action='store_true', help='''Use parallel build.
    The build setup doesn't get all dependencies right, so --parallel only works if you're just rebuilding ONNXRuntime code.
    If you've done an update that fetched external dependencies you have to build without --parallel the first time.
    Once that's done, run with "--build --parallel --test" to just build in parallel and run tests.''')
    parser.add_argument("--test", action='store_true', help="Run unit tests.")

    # enable ONNX tests
    parser.add_argument("--enable_onnx_tests", action='store_true',
                        help='''When running the Test phase, run onnx_test_running against available test data directories.''')
    parser.add_argument("--path_to_protoc_exe", help="Path to protoc exe. ")
    parser.add_argument("--download_test_data", action="store_true",
                        help='''Downloads test data without running the tests''')
    parser.add_argument("--test_data_url", help="Test data URL.")
    parser.add_argument("--test_data_checksum", help="Test data checksum (MD5 digest).")

    # generate documentaiton
    parser.add_argument("--gen_doc", action='store_true', help="Generate documentation on contrib ops")

    # CUDA related
    parser.add_argument("--use_cuda", action='store_true', help="Enable CUDA.")
    parser.add_argument("--cuda_version", help="The version of CUDA toolkit to use. Auto-detect if not specified. e.g. 9.0")
    parser.add_argument("--cuda_home", help="Path to CUDA home."
                                            "Read from CUDA_HOME environment variable if --use_cuda is true and --cuda_home is not specified.")
    parser.add_argument("--cudnn_home", help="Path to CUDNN home. "
                                             "Read from CUDNN_HOME environment variable if --use_cuda is true and --cudnn_home is not specified.")

    # Python bindings
    parser.add_argument("--enable_pybind", action='store_true', help="Enable Python Bindings.")
    parser.add_argument("--build_wheel", action='store_true', help="Build Python Wheel. ")
    parser.add_argument("--numpy_version", default='1.15.0', help="Installs a specific version of numpy "
                        "before building the python binding.")
    parser.add_argument("--skip-keras-test", action='store_true', help="Skip tests with Keras if keras is installed")

    # C-Sharp bindings
    parser.add_argument("--build_csharp", action='store_true', help="Build C#.Net DLL and NuGet package")


    # Build a shared lib
    parser.add_argument("--build_shared_lib", action='store_true', help="Build a shared library for the ONNXRuntime.")

    # Build ONNX Runtime server
    parser.add_argument("--build_server", action='store_true', help="Build server application for the ONNXRuntime.")
    parser.add_argument("--enable_server_tests", action='store_true', help="Run server application tests.")

    # Build options
    parser.add_argument("--cmake_extra_defines", nargs="+",
                        help="Extra definitions to pass to CMake during build system generation. " +
                             "These are just CMake -D options without the leading -D.")
    parser.add_argument("--x86", action='store_true',
                        help="Create x86 makefiles. Requires --update and no existing cache CMake setup. Delete CMakeCache.txt if needed")
    parser.add_argument("--arm", action='store_true',
                        help="Create ARM makefiles. Requires --update and no existing cache CMake setup. Delete CMakeCache.txt if needed")
    parser.add_argument("--arm64", action='store_true',
                        help="Create ARM64 makefiles. Requires --update and no existing cache CMake setup. Delete CMakeCache.txt if needed")
    parser.add_argument("--msvc_toolset", help="MSVC toolset to use. e.g. 14.11")

    # Arguments needed by CI
    parser.add_argument("--cmake_path", default="cmake", help="Path to the CMake program.")
    parser.add_argument("--ctest_path", default="ctest", help="Path to the CTest program.")
    parser.add_argument("--skip_submodule_sync", action='store_true', help="Don't do a 'git submodule update'. Makes the Update phase faster.")

    parser.add_argument("--use_jemalloc", action='store_true', help="Use jemalloc.")
    parser.add_argument("--use_openblas", action='store_true', help="Build with OpenBLAS.")
    parser.add_argument("--use_mkldnn", action='store_true', help="Build with MKLDNN.")
    parser.add_argument("--use_mklml", action='store_true', help="Build with MKLML.")
    parser.add_argument("--use_ngraph", action='store_true', help="Build with nGraph.")
    parser.add_argument("--use_nsync", action='store_true', help="Build with NSYNC.")
    parser.add_argument("--use_preinstalled_eigen", action='store_true', help="Use pre-installed eigen.")
    parser.add_argument("--eigen_path", help="Path to pre-installed eigen.")
    parser.add_argument("--use_tvm", action="store_true", help="Build with tvm")
    parser.add_argument("--use_openmp", action='store_true', help="Build with OpenMP.")
    parser.add_argument("--use_llvm", action="store_true", help="Build tvm with llvm")
    parser.add_argument("--use_eigenthreadpool", action="store_true", help="Build with eigenthreadpool")
    parser.add_argument("--enable_msinternal", action="store_true", help="Enable for Microsoft internal builds only.")
    parser.add_argument("--llvm_path", help="Path to llvm dir")
    parser.add_argument("--azure_sas_key", help="Azure storage sas key, starts with '?'")
    parser.add_argument("--use_brainslice", action="store_true", help="Build with brain slice")
    parser.add_argument("--brain_slice_package_path", help="Path to brain slice packages")
    parser.add_argument("--brain_slice_package_name", help="Name of brain slice packages")
    parser.add_argument("--brain_slice_client_package_name", help="Name of brainslice client package")
    parser.add_argument("--use_nuphar", action='store_true', help="Build with nuphar")
    parser.add_argument("--use_tensorrt", action='store_true', help="Build with TensorRT")
    parser.add_argument("--tensorrt_home", help="Path to TensorRT installation dir")
    parser.add_argument("--use_full_protobuf", action='store_true', help="Use the full protobuf library")
    parser.add_argument("--disable_contrib_ops", action='store_true', help="Disable contrib ops (reduces binary size)")
    parser.add_argument("--skip_onnx_tests", action='store_true', help="Explicitly disable all onnx related tests")
    parser.add_argument("--enable_msvc_static_runtime", action='store_true', help="Enable static linking of MSVC runtimes.")
    return parser.parse_args()

def resolve_executable_path(command_or_path):
    """Returns the absolute path of an executable."""
    executable_path = shutil.which(command_or_path)
    if executable_path is None:
        raise BuildError("Failed to resolve executable path for '{}'.".format(command_or_path))
    return os.path.realpath(executable_path)

def is_windows():
    return sys.platform.startswith("win")

def is_ubuntu_1604():
    return platform.linux_distribution()[0] == 'Ubuntu' and platform.linux_distribution()[1] == '16.04'

def get_config_build_dir(build_dir, config):
    # build directory per configuration
    return os.path.join(build_dir, config)

def run_subprocess(args, cwd=None, capture=False, dll_path=None, shell=False):
    log.debug("Running subprocess in '{0}'\n{1}".format(cwd or os.getcwd(), args))
    my_env = os.environ.copy()
    if dll_path:
        if is_windows():
            my_env["PATH"] = dll_path + os.pathsep + my_env["PATH"]
        else:
            if "LD_LIBRARY_PATH" in my_env:
                my_env["LD_LIBRARY_PATH"] += os.pathsep + dll_path
            else:
                my_env["LD_LIBRARY_PATH"] = dll_path

    stdout, stderr = (subprocess.PIPE, subprocess.STDOUT) if capture else (None, None)
    return subprocess.run(args, cwd=cwd, check=True, stdout=stdout, stderr=stderr, env=my_env, shell=shell)

def update_submodules(source_dir):
    run_subprocess(["git", "submodule", "update", "--init", "--recursive"], cwd=source_dir)

def is_docker():
    path = '/proc/self/cgroup'
    return (
        os.path.exists('/.dockerenv') or
        os.path.isfile(path) and any('docker' in line for line in open(path))
    )

def is_sudo():
    return 'SUDO_UID' in os.environ.keys()

def install_apt_package(package):
    have = package in str(run_subprocess(["apt", "list", "--installed", package], capture=True).stdout)
    if not have:
        if is_sudo():
            run_subprocess(['apt-get', 'install', '-y', package])
        else:
            raise BuildError(package + " APT package missing. Please re-run this script using sudo to install.")

def install_ubuntu_deps(args):
    'Check if the necessary Ubuntu dependencies are installed. Not required on docker. Provide help output if missing.'

    # check we need the packages first
    if not (args.enable_pybind or args.use_openblas):
        return

    # not needed on docker as packages are pre-installed
    if not is_docker():
        try:
            if args.enable_pybind:
                install_apt_package("python3")

            if args.use_openblas:
                install_apt_package("libopenblas-dev")

        except Exception as e:
            raise BuildError("Error setting up required APT packages. {}".format(str(e)))

def install_python_deps(numpy_version=""):
    dep_packages = ['setuptools', 'wheel']
    dep_packages.append('numpy==%s' % numpy_version if numpy_version else 'numpy')
    run_subprocess([sys.executable, '-m', 'pip', 'install', '--trusted-host', 'files.pythonhosted.org'] + dep_packages)

def check_md5(filename, expected_md5):
    if not os.path.exists(filename):
        return False
    hash_md5 = hashlib.md5()
    BLOCKSIZE = 1024*64
    with open(filename, "rb") as f:
        buf = f.read(BLOCKSIZE)
        while len(buf) > 0:
            hash_md5.update(buf)
            buf = f.read(BLOCKSIZE)
    hex = hash_md5.hexdigest()
    if hex != expected_md5:
        log.info('md5 mismatch, expect %s, got %s' % (expected_md5, hex))
        os.remove(filename)
        return False
    return True

#the last part of src_url should be unique, across all the builds
def download_test_data(build_dir, src_url, expected_md5, azure_sas_key):
    cache_dir = os.path.join(expanduser("~"), '.cache','onnxruntime')
    os.makedirs(cache_dir, exist_ok=True)
    local_zip_file = os.path.join(cache_dir, os.path.basename(src_url))
    if not check_md5(local_zip_file, expected_md5):
        log.info("Downloading test data")
        if azure_sas_key:
            src_url += azure_sas_key
        # try to avoid logging azure_sas_key
        if shutil.which('aria2c'):
            result = subprocess.run(['aria2c','-x', '5', '-j',' 5',  '-q', src_url, '-d', cache_dir])
            if result.returncode != 0:
                raise BuildError("aria2c exited with code {}.".format(result.returncode))
        elif shutil.which('curl'):
            result = subprocess.run(['curl', '-s', src_url, '-o', local_zip_file])
            if result.returncode != 0:
                raise BuildError("curl exited with code {}.".format(result.returncode))
        else:
            import urllib.request
            import urllib.error
            try:
                urllib.request.urlretrieve(src_url, local_zip_file)
            except urllib.error.URLError:
                raise BuildError("urllib.request.urlretrieve() failed.")
    models_dir = os.path.join(build_dir,'models')
    if os.path.exists(models_dir):
        log.info('deleting %s' % models_dir)
        shutil.rmtree(models_dir)
    if shutil.which('unzip'):
        run_subprocess(['unzip','-qd', models_dir, local_zip_file])
    elif shutil.which('7za'):
        run_subprocess(['7za','x', local_zip_file, '-y', '-o' + models_dir])
    else:
        #TODO: use python for unzip
        log.error("No unzip tool for use")
        return False
    return True

def setup_test_data(build_dir, configs, test_data_url, test_data_checksum, azure_sas_key):
    if test_data_url is not None:
        """Sets up the test data, downloading it if needed."""
        if not download_test_data(build_dir, test_data_url, test_data_checksum, azure_sas_key):
            raise BuildError("Failed to set up test data.")

    # create a shortcut for test models if there is a 'models' folder in build_dir
    if is_windows():
        src_model_dir = os.path.join(build_dir, 'models')
        for config in configs:
            config_build_dir = get_config_build_dir(build_dir, config)
            os.makedirs(config_build_dir, exist_ok=True)
            dest_model_dir = os.path.join(config_build_dir, 'models')
            if os.path.exists(src_model_dir) and not os.path.exists(dest_model_dir):
                log.debug("creating shortcut %s -> %s"  % (src_model_dir, dest_model_dir))
                run_subprocess(['mklink', '/D', '/J', dest_model_dir, src_model_dir], shell=True)

def generate_build_tree(cmake_path, source_dir, build_dir, cuda_home, cudnn_home, tensorrt_home, path_to_protoc_exe, configs, cmake_extra_defines, args, cmake_extra_args):
    log.info("Generating CMake build tree")
    cmake_dir = os.path.join(source_dir, "cmake")
    # TODO: fix jemalloc build so it does not conflict with onnxruntime shared lib builds. (e.g. onnxuntime_pybind)
    # for now, disable jemalloc if pybind is also enabled.
    cmake_args = [cmake_path, cmake_dir,
                 "-Donnxruntime_RUN_ONNX_TESTS=" + ("ON" if args.enable_onnx_tests else "OFF"),
                 "-Donnxruntime_GENERATE_TEST_REPORTS=ON",
                 "-Donnxruntime_DEV_MODE=ON",
                 "-DPYTHON_EXECUTABLE=" + sys.executable,
                 "-Donnxruntime_USE_CUDA=" + ("ON" if args.use_cuda else "OFF"),
                 "-Donnxruntime_USE_NSYNC=" + ("OFF" if is_windows() or not args.use_nsync else "ON"),
                 "-Donnxruntime_CUDNN_HOME=" + (cudnn_home if args.use_cuda else ""),
                 "-Donnxruntime_CUDA_HOME=" + (cuda_home if args.use_cuda else ""),
                 "-Donnxruntime_USE_JEMALLOC=" + ("ON" if args.use_jemalloc else "OFF"),
                 "-Donnxruntime_ENABLE_PYTHON=" + ("ON" if args.enable_pybind else "OFF"),
                 "-Donnxruntime_BUILD_CSHARP=" + ("ON" if args.build_csharp else "OFF"),
                 "-Donnxruntime_BUILD_SHARED_LIB=" + ("ON" if args.build_shared_lib else "OFF"),
                 "-Donnxruntime_USE_EIGEN_FOR_BLAS=" + ("OFF" if args.use_openblas else "ON"),
                 "-Donnxruntime_USE_OPENBLAS=" + ("ON" if args.use_openblas else "OFF"),
                 "-Donnxruntime_USE_MKLDNN=" + ("ON" if args.use_mkldnn else "OFF"),
                 "-Donnxruntime_USE_MKLML=" + ("ON" if args.use_mklml else "OFF"),
                 "-Donnxruntime_USE_NGRAPH=" + ("ON" if args.use_ngraph else "OFF"),
                 "-Donnxruntime_USE_OPENMP=" + ("ON" if args.use_openmp else "OFF"),
                 "-Donnxruntime_USE_TVM=" + ("ON" if args.use_tvm else "OFF"),
                 "-Donnxruntime_USE_LLVM=" + ("ON" if args.use_llvm else "OFF"),
                 "-Donnxruntime_ENABLE_MICROSOFT_INTERNAL=" + ("ON" if args.enable_msinternal else "OFF"),
                 "-Donnxruntime_USE_BRAINSLICE=" + ("ON" if args.use_brainslice else "OFF"),
                 "-Donnxruntime_USE_NUPHAR=" + ("ON" if args.use_nuphar else "OFF"),
                 "-Donnxruntime_USE_EIGEN_THREADPOOL=" + ("ON" if args.use_eigenthreadpool else "OFF"),
                 "-Donnxruntime_USE_TENSORRT=" + ("ON" if args.use_tensorrt else "OFF"),
                 "-Donnxruntime_TENSORRT_HOME=" + (tensorrt_home if args.use_tensorrt else ""),
                  # By default - we currently support only cross compiling for ARM/ARM64 (no native compilation supported through this script)
                 "-Donnxruntime_CROSS_COMPILING=" + ("ON" if args.arm64 or args.arm else "OFF"),
                 "-Donnxruntime_BUILD_SERVER=" + ("ON" if args.build_server else "OFF"),
                 "-Donnxruntime_BUILD_x86=" + ("ON" if args.x86 else "OFF"),
                  # nGraph and TensorRT providers currently only supports full_protobuf option.
                 "-Donnxruntime_USE_FULL_PROTOBUF=" + ("ON" if args.use_full_protobuf or args.use_ngraph or args.use_tensorrt or args.build_server or args.gen_doc else "OFF"),
                 "-Donnxruntime_DISABLE_CONTRIB_OPS=" + ("ON" if args.disable_contrib_ops else "OFF"),
                 "-Donnxruntime_MSVC_STATIC_RUNTIME=" + ("ON" if args.enable_msvc_static_runtime else "OFF"),
                 ]
    if args.use_brainslice:
        bs_pkg_name = args.brain_slice_package_name.split('.', 1)
        bs_shared_lib_name = '.'.join((bs_pkg_name[0], 'redist', bs_pkg_name[1]))
        cmake_args += [
            "-Donnxruntime_BRAINSLICE_LIB_PATH=%s/%s" % (args.brain_slice_package_path, args.brain_slice_package_name),
            "-Donnxruntime_BS_CLIENT_PACKAGE=%s/%s" % (args.brain_slice_package_path, args.brain_slice_client_package_name),
            "-Donnxruntime_BRAINSLICE_dynamic_lib_PATH=%s/%s" % (args.brain_slice_package_path, bs_shared_lib_name)]

    if args.use_llvm:
        cmake_args += ["-DLLVM_DIR=%s" % args.llvm_path]

    if args.use_cuda and not is_windows():
        nvml_stub_path = cuda_home + "/lib64/stubs"
        cmake_args += ["-DCUDA_CUDA_LIBRARY=" + nvml_stub_path]

    if args.use_preinstalled_eigen:
        cmake_args += ["-Donnxruntime_USE_PREINSTALLED_EIGEN=ON",
                       "-Deigen_SOURCE_PATH=" + args.eigen_path]

    if path_to_protoc_exe:
        cmake_args += ["-DONNX_CUSTOM_PROTOC_EXECUTABLE=%s" % path_to_protoc_exe]

    if args.gen_doc:
        cmake_args += ["-Donnxruntime_PYBIND_EXPORT_OPSCHEMA=ON"]

    cmake_args += ["-D{}".format(define) for define in cmake_extra_defines]

    if is_windows():
        cmake_args += cmake_extra_args

    for config in configs:
        config_build_dir = get_config_build_dir(build_dir, config)
        os.makedirs(config_build_dir, exist_ok=True)

        if args.use_tvm:
            os.environ["PATH"] = os.path.join(config_build_dir, "external", "tvm", config) + os.pathsep + os.environ["PATH"]

        run_subprocess(cmake_args  + ["-DCMAKE_BUILD_TYPE={}".format(config)], cwd=config_build_dir)


def clean_targets(cmake_path, build_dir, configs):
    for config in configs:
        log.info("Cleaning targets for %s configuration", config)
        build_dir2 = get_config_build_dir(build_dir, config)
        cmd_args = [cmake_path,
                    "--build", build_dir2,
                    "--config", config,
                    "--target", "clean"]

        run_subprocess(cmd_args)

def build_targets(cmake_path, build_dir, configs, parallel):
    for config in configs:
        log.info("Building targets for %s configuration", config)
        build_dir2 = get_config_build_dir(build_dir, config)
        cmd_args = [cmake_path,
                    "--build", build_dir2,
                    "--config", config]

        build_tool_args = []
        if parallel:
            num_cores = str(multiprocessing.cpu_count())
            if is_windows():
                build_tool_args += ["/maxcpucount:" + num_cores]
            else:
                build_tool_args += ["-j" + num_cores]

        if (build_tool_args):
            cmd_args += [ "--" ]
            cmd_args += build_tool_args

        run_subprocess(cmd_args)

def add_dir_if_exists(dir, dir_list):
    if (os.path.isdir(dir)):
        dir_list.append(dir)

def setup_cuda_vars(args):

    cuda_home = ""
    cudnn_home = ""

    if (args.use_cuda):
        cuda_home = args.cuda_home if args.cuda_home else os.getenv("CUDA_HOME")
        cudnn_home = args.cudnn_home if args.cudnn_home else os.getenv("CUDNN_HOME")

        cuda_home_valid = (cuda_home != None and os.path.exists(cuda_home))
        cudnn_home_valid = (cudnn_home != None and os.path.exists(cudnn_home))

        if (not cuda_home_valid or not cudnn_home_valid):
            raise BuildError("cuda_home and cudnn_home paths must be specified and valid.",
                             "cuda_home='{}' valid={}. cudnn_home='{}' valid={}"
                             .format(cuda_home, cuda_home_valid, cudnn_home, cudnn_home_valid))

        if (is_windows()):
            # Validate that the cudnn_home is pointing at the right level
            if (not os.path.exists(os.path.join(cudnn_home, "bin"))):
                raise BuildError("cudnn_home path should include the 'cuda' folder, and must contain the CUDNN 'bin' directory.",
                                 "cudnn_home='{}'".format(cudnn_home))

            os.environ["CUDA_PATH"] = cuda_home
            os.environ["CUDA_TOOLKIT_ROOT_DIR"] = cuda_home

            cuda_bin_path = os.path.join(cuda_home, 'bin')
            os.environ["CUDA_BIN_PATH"] = cuda_bin_path
            os.environ["PATH"] += os.pathsep + cuda_bin_path + os.pathsep + os.path.join(cudnn_home, 'bin')
            # Add version specific CUDA_PATH_Vx_y value as the Visual Studio build files require that
            version_file = os.path.join(cuda_home, 'version.txt')
            if not os.path.exists(version_file):
                raise BuildError("No version file found in CUDA install directory. Looked for " + version_file)

            cuda_major_version = "unknown"

            with open(version_file) as f:
                # First line of version file should have something like 'CUDA Version 9.2.148'
                first_line = f.readline()
                m = re.match("CUDA Version (\d+).(\d+)", first_line)
                if not m:
                    raise BuildError("Couldn't read version from first line of " + version_file)

                cuda_major_version = m.group(1)
                minor = m.group(2)
                os.environ["CUDA_PATH_V{}_{}".format(cuda_major_version, minor)] = cuda_home

            vc_ver_str = os.getenv("VCToolsVersion") or ""
            vc_ver = vc_ver_str.split(".")
            if len(vc_ver) != 3:
                log.warning("Unable to automatically verify VS 2017 toolset is compatible with CUDA. Will attempt to use.")
                log.warning("Failed to get valid Visual C++ Tools version from VCToolsVersion environment variable value of '" + vc_ver_str + "'")
                log.warning("VCToolsVersion is set in a VS 2017 Developer Command shell, or by running \"%VS2017INSTALLDIR%\\VC\\Auxiliary\\Build\\vcvars64.bat\"")
                log.warning("See build.md in the root ONNXRuntime directory for instructions on installing the Visual C++ 2017 14.11 toolset if needed.")

            elif cuda_major_version == "9" and vc_ver[0] == "14" and int(vc_ver[1]) > 11:
                raise BuildError("Visual C++ Tools version not supported by CUDA v9. You must setup the environment to use the 14.11 toolset.",
                                 "Current version is {}. CUDA 9.2 requires version 14.11.*".format(vc_ver_str),
                                 "If necessary manually install the 14.11 toolset using the Visual Studio 2017 updater.",
                                 "See 'Windows CUDA Build' in build.md in the root directory of this repository.")

    return cuda_home, cudnn_home

def setup_tensorrt_vars(args):

    tensorrt_home = ""

    if (args.use_tensorrt):
        tensorrt_home = args.tensorrt_home if args.tensorrt_home else os.getenv("TENSORRT_HOME")

        tensorrt_home_valid = (tensorrt_home != None and os.path.exists(tensorrt_home))

        if (not tensorrt_home_valid):
            raise BuildError("tensorrt_home paths must be specified and valid.",
                             "tensorrt_home='{}' valid={}."
                             .format(tensorrt_home, tensorrt_home_valid))

        # Set maximum batch size for TensorRT. The number needs to be no less than maximum batch size in all unit tests 
        os.environ["ORT_TENSORRT_MAX_BATCH_SIZE"] = "13"

        # Set maximum workspace size in byte for TensorRT (1GB = 1073741824 bytes).  
        os.environ["ORT_TENSORRT_MAX_WORKSPACE_SIZE"] = "1073741824"  
        
    return tensorrt_home

def run_onnxruntime_tests(args, source_dir, ctest_path, build_dir, configs, enable_python_tests, enable_tvm = False, enable_tensorrt = False, enable_ngraph = False):
    for config in configs:
        log.info("Running tests for %s configuration", config)
        cwd = get_config_build_dir(build_dir, config)
        if enable_tvm:
          dll_path = os.path.join(build_dir, config, "external", "tvm", config)
        elif enable_tensorrt:
          dll_path = os.path.join(args.tensorrt_home, 'lib')
        else:
          dll_path = None
        run_subprocess([ctest_path, "--build-config", config, "--verbose"],
                       cwd=cwd, dll_path=dll_path)

        if enable_python_tests:
            # Disable python tests for TensorRT because many tests are not supported yet
            if enable_tensorrt :
                return
            if is_windows():
                cwd = os.path.join(cwd, config)
            run_subprocess([sys.executable, 'onnxruntime_test_python.py'], cwd=cwd, dll_path=dll_path)
            try:
                import onnx
                onnx_test = True
            except ImportError:
                warnings.warn("onnx is not installed. Following test cannot be run.")
                onnx_test = False
            if onnx_test:
                run_subprocess([sys.executable, 'onnxruntime_test_python_backend.py'], cwd=cwd, dll_path=dll_path)
                run_subprocess([sys.executable, os.path.join(source_dir,'onnxruntime','test','onnx','gen_test_models.py'),'--output_dir','test_models'], cwd=cwd)
                run_subprocess([os.path.join(cwd,'onnx_test_runner'), 'test_models'], cwd=cwd)
                if config != 'Debug':
                    run_subprocess([sys.executable, 'onnx_backend_test_series.py'], cwd=cwd, dll_path=dll_path)
            if not args.skip_keras_test:
                try:
                    import onnxmltools
                    import keras
                    onnxml_test = True
                except ImportError:
                    warnings.warn("onnxmltools and keras are not installed. Following test cannot be run.")
                    onnxml_test = False
                if onnxml_test:
                    run_subprocess([sys.executable, 'onnxruntime_test_python_keras.py'], cwd=cwd, dll_path=dll_path)


def run_onnx_tests(build_dir, configs, onnx_test_data_dir, provider, enable_parallel_executor_test, num_parallel_models):
    for config in configs:
        cwd = get_config_build_dir(build_dir, config)
        if is_windows():
           exe = os.path.join(cwd, config, 'onnx_test_runner')
           model_dir = os.path.join(cwd, "models")
        else:
           exe = os.path.join(cwd, 'onnx_test_runner')
           model_dir = os.path.join(build_dir, "models")
        cmd = []
        if provider:
          cmd += ["-e", provider]
          if provider == 'mkldnn':
             cmd += ['-c', '1']

        if num_parallel_models > 0:
          cmd += ["-j", str(num_parallel_models)]

        if config != 'Debug' and os.path.exists(model_dir):
          if provider == 'tensorrt':
            model_dir = os.path.join(model_dir, "opset8")
          cmd.append(model_dir)
        if os.path.exists(onnx_test_data_dir):
          cmd.append(onnx_test_data_dir)

        run_subprocess([exe] + cmd, cwd=cwd)
        if enable_parallel_executor_test:
          run_subprocess([exe,'-x'] + cmd, cwd=cwd)


def run_server_tests(build_dir, configs):
    run_subprocess([sys.executable, '-m', 'pip', 'install', '--trusted-host', 'files.pythonhosted.org', 'requests', 'protobuf', 'numpy'])
    for config in configs:
        config_build_dir = get_config_build_dir(build_dir, config)
        if is_windows():
            server_app_path = os.path.join(config_build_dir, config, 'onnxruntime_server.exe')
        else:
            server_app_path = os.path.join(config_build_dir, 'onnxruntime_server')
        server_test_folder = os.path.join(config_build_dir, 'server_test')
        server_test_data_folder = os.path.join(os.path.join(config_build_dir, 'testdata'), 'server')
        run_subprocess([sys.executable, 'test_main.py', server_app_path, server_test_data_folder, server_test_data_folder], cwd=server_test_folder, dll_path=None)

def build_python_wheel(source_dir, build_dir, configs, use_cuda, use_ngraph, use_tensorrt, nightly_build = False):
    for config in configs:
        cwd = get_config_build_dir(build_dir, config)

        if is_windows():
            cwd = os.path.join(cwd, config)
        if nightly_build:
            if use_tensorrt:
                run_subprocess([sys.executable, os.path.join(source_dir, 'setup.py'), 'bdist_wheel', '--use_tensorrt', '--nightly_build'], cwd=cwd)
            elif use_cuda:
                run_subprocess([sys.executable, os.path.join(source_dir, 'setup.py'), 'bdist_wheel', '--use_cuda', '--nightly_build'], cwd=cwd)
            elif use_ngraph:
                run_subprocess([sys.executable, os.path.join(source_dir, 'setup.py'), 'bdist_wheel', '--use_ngraph', '--nightly-build'], cwd=cwd)
            else:
                run_subprocess([sys.executable, os.path.join(source_dir, 'setup.py'), 'bdist_wheel', '--nightly_build'], cwd=cwd)
        else:
            if use_tensorrt:
                run_subprocess([sys.executable, os.path.join(source_dir, 'setup.py'), 'bdist_wheel', '--use_tensorrt'], cwd=cwd)
            elif use_cuda:
                run_subprocess([sys.executable, os.path.join(source_dir, 'setup.py'), 'bdist_wheel', '--use_cuda'], cwd=cwd)
            elif use_ngraph:
                run_subprocess([sys.executable, os.path.join(source_dir, 'setup.py'), 'bdist_wheel', '--use_ngraph'], cwd=cwd)
            else:
                run_subprocess([sys.executable, os.path.join(source_dir, 'setup.py'), 'bdist_wheel'], cwd=cwd)
        if is_ubuntu_1604():
            run_subprocess([os.path.join(source_dir, 'rename_manylinux.sh')], cwd=cwd+'/dist')

def build_protoc_for_windows_host(cmake_path, source_dir, build_dir):
    if not is_windows():
        raise BuildError('Currently only support building protoc for Windows host while cross-compiling for ARM/ARM64 arch')

    log.info("Building protoc for host to be used in cross-compiled build process")
    protoc_build_dir = os.path.join(build_dir, 'host_protoc')
    os.makedirs(protoc_build_dir, exist_ok=True)
    # Generate step
    cmd_args = [cmake_path,
                os.path.join(source_dir, 'cmake\external\protobuf\cmake'),
                '-T',
                'host=x64',
                '-G',
                'Visual Studio 15 2017',
                '-Dprotobuf_BUILD_TESTS=OFF',
                '-Dprotobuf_WITH_ZLIB_DEFAULT=OFF',
                '-Dprotobuf_BUILD_SHARED_LIBS=OFF']
    run_subprocess(cmd_args, cwd= protoc_build_dir)
    # Build step
    cmd_args = [cmake_path,
                "--build", protoc_build_dir,
                "--config", "Release",
                "--target", "protoc"]
    run_subprocess(cmd_args)

    if not os.path.exists(os.path.join(build_dir, 'host_protoc', 'Release', 'protoc.exe')):
        raise BuildError("Couldn't build protoc.exe for host. Failing build.")

def generate_documentation(source_dir, build_dir, configs):
    operator_doc_path = os.path.join(source_dir, 'docs', 'ContribOperators.md')
    for config in configs:
        #copy the gen_doc.py
        shutil.copy(os.path.join(source_dir,'tools','python','gen_doc.py'),
                    os.path.join(build_dir,config, config))
        run_subprocess([
                        sys.executable,
                        'gen_doc.py',
                        '--output_path', operator_doc_path
                    ], 
                    cwd = os.path.join(build_dir,config, config))
    docdiff = ''
    try:    
        docdiff = subprocess.check_output(['git', 'diff', operator_doc_path])
    except subprocess.CalledProcessError:
        print('git diff returned non-zero error code')
    

    if len(docdiff) > 0:
        raise BuildError('The updated operator document file '+str(operator_doc_path)+' must be checked in.\n diff:\n'+str(docdiff))


def main():
    args = parse_arguments()

    cmake_extra_defines = args.cmake_extra_defines if args.cmake_extra_defines else []

    # if there was no explicit argument saying what to do, default to update, build and test (for native builds).
    if (args.update == False and args.clean == False and args.build == False and args.test == False):
        log.debug("Defaulting to running update, build [and test for native builds].")
        args.update = True
        args.build = True
        if args.arm or args.arm64:
            args.test = False
        else:
            args.test = True

    if args.use_tensorrt:
        args.use_cuda = True

    if args.build_wheel:
        args.enable_pybind = True

    if args.build_csharp:
        args.build_shared_lib = True

    configs = set(args.config)

    # setup paths and directories
    cmake_path = resolve_executable_path(args.cmake_path)
    ctest_path = resolve_executable_path(args.ctest_path)
    build_dir = args.build_dir
    script_dir = os.path.realpath(os.path.dirname(__file__))
    source_dir = os.path.normpath(os.path.join(script_dir, "..", ".."))

    # if using cuda, setup cuda paths and env vars
    cuda_home, cudnn_home = setup_cuda_vars(args)

    # if using tensorrt, setup tensorrt paths
    tensorrt_home = setup_tensorrt_vars(args)

    os.makedirs(build_dir, exist_ok=True)

    log.info("Build started")
    os.environ["PATH"] = os.environ["PATH"] + os.pathsep + os.path.dirname(sys.executable)
    if (args.update):
        cmake_extra_args = []
        if(is_windows()):
          if (args.x86):
            cmake_extra_args = ['-A','Win32','-T','host=x64','-G', 'Visual Studio 15 2017']
          elif (args.arm or args.arm64):
            # Cross-compiling for ARM(64) architecture
            # First build protoc for host to use during cross-compilation
            build_protoc_for_windows_host(cmake_path, source_dir, build_dir)
            if args.arm:
                cmake_extra_args = ['-A', 'ARM']
            else:
                cmake_extra_args = ['-A', 'ARM64']
            cmake_extra_args += ['-G', 'Visual Studio 15 2017']
            # Cannot test on host build machine for cross-compiled builds (Override any user-defined behaviour for test if any)
            if args.test:
                log.info("Cannot test on host build machine for cross-compiled ARM(64) builds. Will skip test running after build.")
                args.test = False
          else:
            toolset = 'host=x64'
            if (args.msvc_toolset):
                toolset += ',version=' + args.msvc_toolset
            if (args.cuda_version):
                toolset += ',cuda=' + args.cuda_version

            cmake_extra_args = ['-A','x64','-T', toolset, '-G', 'Visual Studio 15 2017']
        if is_ubuntu_1604():
            if (args.arm or args.arm64):
                raise BuildError("Only Windows ARM(64) cross-compiled builds supported currently through this script")
            install_ubuntu_deps(args)
            if not is_docker():
                install_python_deps()
        if (args.enable_pybind and is_windows()):
            install_python_deps(args.numpy_version)
        if (not args.skip_submodule_sync):
            update_submodules(source_dir)

        if args.enable_onnx_tests or args.download_test_data:
            if args.download_test_data:
                if not args.test_data_url or not args.test_data_checksum:
                   raise UsageError("The test_data_url and test_data_checksum arguments are required.")
            setup_test_data(build_dir, configs, args.test_data_url, args.test_data_checksum, args.azure_sas_key)

        path_to_protoc_exe = None
        if args.path_to_protoc_exe:
            path_to_protoc_exe = args.path_to_protoc_exe
        # Need to provide path to protoc.exe built for host to be used in the cross-compiled build process
        elif args.arm or args.arm64:
            path_to_protoc_exe = os.path.join(build_dir, 'host_protoc', 'Release', 'protoc.exe')

        generate_build_tree(cmake_path, source_dir, build_dir, cuda_home, cudnn_home, tensorrt_home, path_to_protoc_exe, configs, cmake_extra_defines,
                            args, cmake_extra_args)

    if (args.clean):
        clean_targets(cmake_path, build_dir, configs)

    if (args.build):
        build_targets(cmake_path, build_dir, configs, args.parallel)

    if args.test :
        run_onnxruntime_tests(args, source_dir, ctest_path, build_dir, configs,
                              args.enable_pybind if not args.skip_onnx_tests else False,
                              args.use_tvm, args.use_tensorrt, args.use_ngraph)
        # run the onnx model tests if requested explicitly.
        if args.enable_onnx_tests and not args.skip_onnx_tests:
            # directory from ONNX submodule with ONNX test data
            onnx_test_data_dir = '/data/onnx'
            if is_windows() or not os.path.exists(onnx_test_data_dir):
                onnx_test_data_dir = os.path.join(source_dir, "cmake", "external", "onnx", "onnx", "backend", "test", "data")
            if args.use_tensorrt:
              # Disable some onnx unit tests that TensorRT parser doesn't supported yet
              onnx_test_data_dir = os.path.join(source_dir, "cmake", "external", "onnx", "onnx", "backend", "test", "data", "simple")
              run_onnx_tests(build_dir, configs, onnx_test_data_dir, 'tensorrt', False, 1)
            elif args.use_cuda:
              run_onnx_tests(build_dir, configs, onnx_test_data_dir, 'cuda', False, 2)
            elif args.x86 or platform.system() == 'Darwin':
              run_onnx_tests(build_dir, configs, onnx_test_data_dir, None, False, 1)
            elif args.use_ngraph:
              run_onnx_tests(build_dir, configs, onnx_test_data_dir, 'ngraph', True, 1)
              # TODO: parallel executor test fails on MacOS
            else:
              run_onnx_tests(build_dir, configs, onnx_test_data_dir, None, True, 0)

              if args.use_mkldnn:
                run_onnx_tests(build_dir, configs, onnx_test_data_dir, 'mkldnn', True, 1)

    if args.build_server and args.enable_server_tests:
        run_server_tests(build_dir, configs)

    if args.build:
        if args.build_wheel:
            nightly_build = bool(os.getenv('NIGHTLY_BUILD') == '1')
            build_python_wheel(source_dir, build_dir, configs, args.use_cuda, args.use_ngraph, args.use_tensorrt, nightly_build)

    if args.gen_doc and (args.build or args.test):
        generate_documentation(source_dir, build_dir, configs)

    log.info("Build complete")

if __name__ == "__main__":
    try:
        sys.exit(main())
    except BaseError as e:
        log.error(str(e))
        sys.exit(1)