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# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

option(
    "--with-windows-version",
    nargs=1,
    default="603",
    help="Windows SDK version to target. Win 8.1 (603) is currently"
    "the minimum supported version.",
)


@depends("--with-windows-version")
@imports(_from="__builtin__", _import="ValueError")
def valid_windows_version(value):
    if not value:
        die("Cannot build with --without-windows-version")
    try:
        version = int(value[0], 16)
        if version in (0x603,):
            return version
    except ValueError:
        pass

    die("Invalid value for --with-windows-version (%s)", value[0])


option(env="WINDOWSSDKDIR", nargs=1, help="Directory containing the Windows SDK")


@depends(
    "WINDOWSSDKDIR", "WINSYSROOT", winsysroot, target_windows_abi, host_windows_abi
)
def windows_sdk_dir(
    value, winsysroot_env, winsysroot, target_windows_abi, host_windows_abi
):
    if value:
        if winsysroot_env:
            die("WINDOWSSDKDIR and WINSYSROOT cannot be set together.")
        if winsysroot:
            die("WINDOWSSDKDIR cannot be set when using the bootstrapped WINSYSROOT")
        return value
    if target_windows_abi != "msvc" and host_windows_abi != "msvc":
        return ()

    if winsysroot:
        return [os.path.join(winsysroot, "Windows Kits", "10")]

    return set(
        normalize_path(x[1])
        for x in get_registry_values(
            r"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Kits\Installed Roots"
            r"\KitsRoot*",
            get_32_and_64_bit=True,
        )
    )


@imports("glob")
def get_sdk_dirs(sdk, subdir):
    def get_dirs_containing(sdk, stem, subdir):
        return [
            os.path.dirname(p) for p in glob.glob(os.path.join(sdk, stem, "*", subdir))
        ]

    def categorize(dirs):
        return {os.path.basename(d): d for d in dirs}

    include_dirs = categorize(get_dirs_containing(sdk, "Include", subdir))
    lib_dirs = categorize(get_dirs_containing(sdk, "Lib", subdir))

    valid_versions = sorted(set(include_dirs) & set(lib_dirs), reverse=True)
    return [
        namespace(
            path=sdk,
            lib=lib_dirs[vv],
            include=include_dirs[vv],
        )
        for vv in valid_versions
    ]


@imports(_from="mozbuild.shellutil", _import="quote")
def valid_windows_sdk_dir_result(value):
    if value:
        return "0x%04x in %s" % (value.version, quote(value.path))


@depends(
    target_windows_abi,
    host_windows_abi,
    windows_sdk_dir,
    valid_windows_version,
    "WINDOWSSDKDIR",
)
@checking("for Windows SDK", valid_windows_sdk_dir_result)
@imports(_from="__builtin__", _import="Exception")
@imports(_from="__builtin__", _import="open")
def valid_windows_sdk_dir(
    target_windows_abi,
    host_windows_abi,
    windows_sdk_dir,
    target_version,
    windows_sdk_dir_env,
):
    if target_windows_abi != "msvc" and host_windows_abi != "msvc":
        return None
    if windows_sdk_dir_env:
        windows_sdk_dir_env = windows_sdk_dir_env[0]
    sdks = {}
    for d in windows_sdk_dir:
        sdklist = get_sdk_dirs(d, "um")
        for sdk in sdklist:
            maxver = None
            winsdkver = os.path.join(sdk.include, "um", "winsdkver.h")
            with open(winsdkver) as fh:
                for line in fh.readlines():
                    if line.startswith("#define"):
                        line = line.split(None, 2)
                        assert line.pop(0) == "#define"
                        if line.pop(0) == "WINVER_MAXVER":
                            maxver = line.pop(0)
                            break

            if maxver:
                try:
                    maxver = int(maxver, 0)
                except Exception:
                    pass
                else:
                    sdks[d] = maxver, sdk
                    break

        if d == windows_sdk_dir_env and d not in sdks:
            raise FatalCheckError(
                "Error while checking the version of the SDK in "
                "WINDOWSSDKDIR (%s). Please verify it contains a valid and "
                "complete SDK installation." % windows_sdk_dir_env
            )

    valid_sdks = sorted(sdks, key=lambda x: sdks[x][0], reverse=True)
    if valid_sdks:
        biggest_version, sdk = sdks[valid_sdks[0]]
    if not valid_sdks or biggest_version < target_version:
        if windows_sdk_dir_env:
            raise FatalCheckError(
                "You are targeting Windows version 0x%04x, but your SDK only "
                "supports up to version 0x%04x. Install and use an updated SDK, "
                "or target a lower version using --with-windows-version. "
                "Alternatively, try running the Windows SDK Configuration Tool "
                "and selecting a newer SDK. See "
                "https://developer.mozilla.org/En/Windows_SDK_versions for "
                "details on fixing this." % (target_version, biggest_version)
            )

        raise FatalCheckError(
            "Cannot find a Windows SDK for version >= 0x%04x." % target_version
        )

    return namespace(
        path=sdk.path,
        include=sdk.include,
        lib=sdk.lib,
        version=biggest_version,
    )


@imports(_from="mozbuild.shellutil", _import="quote")
def valid_ucrt_sdk_dir_result(value):
    if value:
        return "%s in %s" % (value.version, quote(value.path))


@depends(windows_sdk_dir, "WINDOWSSDKDIR", target_windows_abi, host_windows_abi)
@checking("for Universal CRT SDK", valid_ucrt_sdk_dir_result)
@imports("os")
@imports(_import="mozpack.path", _as="mozpath")
def valid_ucrt_sdk_dir(
    windows_sdk_dir, windows_sdk_dir_env, target_windows_abi, host_windows_abi
):
    if target_windows_abi != "msvc" and host_windows_abi != "msvc":
        return None
    if windows_sdk_dir_env:
        windows_sdk_dir_env = windows_sdk_dir_env[0]
    sdks = {}
    for d in windows_sdk_dir:
        sdklist = get_sdk_dirs(d, "ucrt")
        for sdk in sdklist:
            version = os.path.basename(sdk.include)
            # We're supposed to always find a version in the directory, because
            # the 8.1 SDK, which doesn't have a version in the directory, doesn't
            # contain the Universal CRT SDK. When the main SDK is 8.1, there
            # is, however, supposed to be a reduced install of the SDK 10
            # with the UCRT.
            if version != "include":
                sdks[d] = Version(version), sdk
                break

        if d == windows_sdk_dir_env and d not in sdks:
            # When WINDOWSSDKDIR is set in the environment and we can't find the
            # Universal CRT SDK, chances are this is a start-shell-msvc*.bat
            # setup, where INCLUDE and LIB already contain the UCRT paths.
            ucrt_includes = [
                p
                for p in os.environ.get("INCLUDE", "").split(";")
                if os.path.basename(p).lower() == "ucrt"
            ]
            ucrt_libs = [
                p
                for p in os.environ.get("LIB", "").split(";")
                if os.path.basename(os.path.dirname(p)).lower() == "ucrt"
            ]
            if ucrt_includes and ucrt_libs:
                # Pick the first of each, since they are the ones that the
                # compiler would look first. Assume they contain the SDK files.
                include = os.path.dirname(ucrt_includes[0])
                lib = os.path.dirname(os.path.dirname(ucrt_libs[0]))
                path = os.path.dirname(os.path.dirname(include))
                version = os.path.basename(include)
                if version != "include" and mozpath.basedir(lib, [path]):
                    sdks[d] = (
                        Version(version),
                        namespace(
                            path=path,
                            include=include,
                            lib=lib,
                        ),
                    )
                    continue
            raise FatalCheckError(
                "The SDK in WINDOWSSDKDIR (%s) does not contain the Universal "
                "CRT." % windows_sdk_dir_env
            )

    valid_sdks = sorted(sdks, key=lambda x: sdks[x][0], reverse=True)
    if not valid_sdks:
        raise FatalCheckError(
            "Cannot find the Universal CRT SDK. " "Please install it."
        )

    version, sdk = sdks[valid_sdks[0]]
    minimum_ucrt_version = Version("10.0.17134.0")
    if version < minimum_ucrt_version:
        raise FatalCheckError(
            "Latest Universal CRT SDK version found %s"
            " and minimum required is %s. This or a later"
            " version can be installed using the Visual"
            " Studio installer." % (version, minimum_ucrt_version)
        )

    return namespace(
        path=sdk.path,
        include=sdk.include,
        lib=sdk.lib,
        version=version,
    )


@depends(target_windows_abi, host_windows_abi, vc_toolchain_search_path)
@imports("os")
def vc_path(target_windows_abi, host_windows_abi, vc_toolchain_search_path):
    if target_windows_abi != "msvc" and host_windows_abi != "msvc":
        return

    # In clang-cl builds, we need the headers and libraries from an MSVC installation.
    vc_program = find_program("cl.exe", paths=vc_toolchain_search_path)
    if not vc_program:
        die("Cannot find a Visual C++ install for e.g. ATL headers.")

    result = os.path.dirname(vc_program)
    while True:
        next, p = os.path.split(result)
        if next == result:
            die(
                "Cannot determine the Visual C++ directory the compiler (%s) "
                "is in" % vc_program
            )
        result = next
        if p.lower() == "bin":
            break
    return os.path.normpath(result)


@depends(vc_path, valid_windows_sdk_dir, valid_ucrt_sdk_dir)
@imports("os")
def include_path(vc_path, windows_sdk_dir, ucrt_sdk_dir):
    if not vc_path:
        return
    atlmfc_dir = os.path.join(vc_path, "atlmfc", "include")
    if not os.path.isdir(atlmfc_dir):
        die(
            "Cannot find the ATL/MFC headers in the Visual C++ directory (%s). "
            "Please install them." % vc_path
        )

    winrt_dir = os.path.join(windows_sdk_dir.include, "winrt")
    if not os.path.isdir(winrt_dir):
        die(
            "Cannot find the WinRT headers in the Windows SDK directory (%s). "
            "Please install them." % windows_sdk_dir.path
        )

    cppwinrt_dir = os.path.join(windows_sdk_dir.include, "cppwinrt")
    if not os.path.isdir(cppwinrt_dir):
        die(
            "Cannot find the C++/WinRT headers in the Windows SDK directory (%s). "
            "Please install them." % windows_sdk_dir.path
        )

    includes = []
    include_env = os.environ.get("INCLUDE")
    if include_env:
        includes.append(include_env)
    includes.extend(
        (
            os.path.join(vc_path, "include"),
            atlmfc_dir,
            os.path.join(windows_sdk_dir.include, "shared"),
            os.path.join(windows_sdk_dir.include, "um"),
            winrt_dir,
            cppwinrt_dir,
            os.path.join(ucrt_sdk_dir.include, "ucrt"),
        )
    )
    # Set in the environment for old-configure
    includes = ";".join(includes)
    os.environ["INCLUDE"] = includes
    return includes


set_config("INCLUDE", include_path)

# cppwinrt requires this on clang because of no coroutine support, which is okay
set_define("_SILENCE_CLANG_COROUTINE_MESSAGE", "")


@template
def lib_path_for(host_or_target):
    @depends(
        host_or_target,
        dependable(host_or_target is host),
        vc_path,
        valid_windows_sdk_dir,
        valid_ucrt_sdk_dir,
        c_compiler,
    )
    @imports("os")
    def lib_path(target, is_host, vc_path, windows_sdk_dir, ucrt_sdk_dir, compiler):
        if not vc_path or target.os != "WINNT":
            return
        sdk_target = {
            "x86": "x86",
            "x86_64": "x64",
            "arm": "arm",
            "aarch64": "arm64",
        }.get(target.cpu)

        # MSVC2017 switched to use the same target naming as the sdk.
        atlmfc_dir = os.path.join(vc_path, "atlmfc", "lib", sdk_target)
        if not os.path.isdir(atlmfc_dir):
            die(
                "Cannot find the ATL/MFC libraries in the Visual C++ directory "
                "(%s). Please install them." % vc_path
            )

        libs = []
        lib_env = os.environ.get("LIB")
        if lib_env and not is_host:
            libs.extend(lib_env.split(";"))
        libs.extend(
            (
                os.path.join(vc_path, "lib", sdk_target),
                atlmfc_dir,
                os.path.join(windows_sdk_dir.lib, "um", sdk_target),
                os.path.join(ucrt_sdk_dir.lib, "ucrt", sdk_target),
            )
        )
        if compiler.type == "clang-cl":
            runtime_dir = check_cmd_output(
                compiler.compiler,
                "/clang:--print-runtime-dir",
                *compiler.flags,
                onerror=lambda: None
            ).strip()
            if runtime_dir and os.path.exists(runtime_dir):
                # Put the clang runtime directory first, in case there is
                # a different version in some of the other directories (notably,
                # some versions of MSVC come with clang runtimes)
                libs.insert(0, runtime_dir)
        return libs

    return lib_path


@depends_if(lib_path_for(target), when=target_is_windows)
@imports("os")
def lib_path(libs):
    # Set in the environment for old-configure
    libs = ";".join(libs)
    os.environ["LIB"] = libs
    return libs


set_config("LIB", lib_path)


lib_path_for_host = lib_path_for(host)


@depends_if(lib_path_for_host, when=host_is_windows)
@imports(_from="mozbuild.shellutil", _import="quote")
def host_linker_libpaths(libs):
    return ["-LIBPATH:%s" % quote(l) for l in libs]


@depends_if(lib_path_for_host, when=host_is_windows)
@imports(_from="mozbuild.shellutil", _import="quote")
def host_linker_libpaths_bat(libs):
    # .bat files need a different style of quoting. Batch quoting is actually
    # not defined, and up to applications to handle, so it's not really clear
    # what should be escaped and what not, but most paths should work just
    # fine without escaping. And we don't care about double-quotes possibly
    # having to be escaped because they're not allowed in file names on
    # Windows.
    return ['"-LIBPATH:%s"' % l for l in libs]


set_config("HOST_LINKER_LIBPATHS", host_linker_libpaths)
set_config("HOST_LINKER_LIBPATHS_BAT", host_linker_libpaths_bat)


@depends(valid_windows_sdk_dir, valid_ucrt_sdk_dir, host)
@imports(_from="os", _import="environ")
def sdk_bin_path(valid_windows_sdk_dir, valid_ucrt_sdk_dir, host):
    if not valid_windows_sdk_dir:
        return

    vc_host = {
        "x86": "x86",
        "x86_64": "x64",
    }.get(host.cpu)

    # From version 10.0.15063.0 onwards the bin path contains the version number.
    versioned_bin = (
        "bin"
        if valid_ucrt_sdk_dir.version < "10.0.15063.0"
        else os.path.join("bin", str(valid_ucrt_sdk_dir.version))
    )
    result = [
        environ["PATH"],
        os.path.join(valid_windows_sdk_dir.path, versioned_bin, vc_host),
    ]
    if vc_host == "x64":
        result.append(os.path.join(valid_windows_sdk_dir.path, versioned_bin, "x86"))
    return result


option(env="LINKER", nargs=1, when=target_is_windows, help="Path to the linker")

link = check_prog(
    "LINKER",
    ("lld-link",),
    input="LINKER",
    when=target_is_windows,
    paths=clang_search_path,
)

option(env="HOST_LINKER", nargs=1, when=host_is_windows, help="Path to the host linker")

host_link = check_prog(
    "HOST_LINKER",
    ("lld-link",),
    input="HOST_LINKER",
    when=host_is_windows,
    paths=clang_search_path,
)

add_old_configure_assignment("LINKER", link)