# -*- 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", host, c_compiler)
def windows_sdk_dir(value, host, compiler):
    if value:
        return value
    # Ideally, we'd actually check for host/target ABI being MSVC, but
    # that's waiting for bug 1617793.
    if host.kernel != "WINNT" or compiler.type != "clang-cl":
        return ()

    return set(
        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,
        )
    )


# The Windows SDK 8.1 and 10 have different layouts. The former has
# $SDK/include/$subdir, while the latter has $SDK/include/$version/$subdir.
# The vcvars* scripts don't actually care about the version, they just take
# the last alphanumerically.
# The $SDK/lib directories always have version subdirectories, but while the
# versions match the one in $SDK/include for SDK 10, it's "winv6.3" for SDK
# 8.1.


@imports("os")
@imports("re")
@imports(_from="__builtin__", _import="sorted")
@imports(_from="__builtin__", _import="Exception")
def get_sdk_dirs(sdk, subdir):
    def get_dirs_containing(sdk, stem, subdir):
        base = os.path.join(sdk, stem)
        try:
            subdirs = [
                d for d in os.listdir(base) if os.path.isdir(os.path.join(base, d))
            ]
        except Exception:
            subdirs = []
        if not subdirs:
            return ()
        if subdir in subdirs:
            return (base,)
        # At this point, either we have an incomplete or invalid SDK directory,
        # or we exclusively have version numbers in subdirs.
        return tuple(
            os.path.join(base, s)
            for s in subdirs
            if os.path.isdir(os.path.join(base, s, 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))

    if "include" in include_dirs:
        include_dirs["winv6.3"] = include_dirs["include"]
        del include_dirs["include"]

    valid_versions = sorted(set(include_dirs) & set(lib_dirs), reverse=True)
    if valid_versions:
        return namespace(
            path=sdk,
            lib=lib_dirs[valid_versions[0]],
            include=include_dirs[valid_versions[0]],
        )


@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(c_compiler, windows_sdk_dir, valid_windows_version, "WINDOWSSDKDIR")
@checking("for Windows SDK", valid_windows_sdk_dir_result)
@imports(_from="__builtin__", _import="sorted")
@imports(_from="__builtin__", _import="Exception")
@imports(_from="textwrap", _import="dedent")
def valid_windows_sdk_dir(
    compiler, windows_sdk_dir, target_version, windows_sdk_dir_env
):
    # Ideally, we'd actually check for host/target ABI being MSVC, but
    # that's waiting for bug 1617793.
    if compiler.type != "clang-cl":
        return None
    if windows_sdk_dir_env:
        windows_sdk_dir_env = windows_sdk_dir_env[0]
    sdks = {}
    for d in windows_sdk_dir:
        sdk = get_sdk_dirs(d, "um")
        if sdk:
            check = dedent(
                """\
            #include <winsdkver.h>
            WINVER_MAXVER
            """
            )
            um_dir = os.path.join(sdk.include, "um")
            shared_dir = os.path.join(sdk.include, "shared")
            result = try_preprocess(
                compiler.wrapper
                + [compiler.compiler]
                + compiler.flags
                + ["-X", "-I", um_dir, "-I", shared_dir],
                "C",
                check,
                onerror=lambda: "",
            )
            if result:
                maxver = result.splitlines()[-1]
                try:
                    maxver = int(maxver, 0)
                except Exception:
                    pass
                else:
                    sdks[d] = maxver, sdk
                    continue
        if d == windows_sdk_dir_env:
            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", c_compiler)
@checking("for Universal CRT SDK", valid_ucrt_sdk_dir_result)
@imports("os")
@imports(_from="__builtin__", _import="sorted")
@imports(_import="mozpack.path", _as="mozpath")
def valid_ucrt_sdk_dir(windows_sdk_dir, windows_sdk_dir_env, compiler):
    # Ideally, we'd actually check for host/target ABI being MSVC, but
    # that's waiting for bug 1617793.
    if compiler.type != "clang-cl":
        return None
    if windows_sdk_dir_env:
        windows_sdk_dir_env = windows_sdk_dir_env[0]
    sdks = {}
    for d in windows_sdk_dir:
        sdk = get_sdk_dirs(d, "ucrt")
        if sdk:
            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
                continue
        if d == windows_sdk_dir_env:
            # 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(c_compiler, host_c_compiler, vc_toolchain_search_path)
@imports("os")
def vc_path(c_compiler, host_c_compiler, vc_toolchain_search_path):
    if c_compiler.type != "clang-cl" and host_c_compiler.type != "clang-cl":
        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)


option(env="DIA_SDK_PATH", nargs=1, help="Path to the Debug Interface Access SDK")


@depends(vc_path, "DIA_SDK_PATH")
@checking("for the Debug Interface Access SDK", lambda x: x or "not found")
@imports("os")
def dia_sdk_dir(vc_path, dia_sdk_path):
    if dia_sdk_path:
        path = os.path.normpath(dia_sdk_path[0])

    elif vc_path:
        # This would be easier if we had the installationPath that
        # get_vc_paths works with, since 'DIA SDK' is relative to that.
        path = os.path.normpath(
            os.path.join(vc_path, "..", "..", "..", "..", "DIA SDK")
        )
    else:
        return

    if os.path.exists(os.path.join(path, "include", "dia2.h")):
        return path


@depends(vc_path, valid_windows_sdk_dir, valid_ucrt_sdk_dir, dia_sdk_dir)
@imports("os")
def include_path(vc_path, windows_sdk_dir, ucrt_sdk_dir, dia_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
        )

    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,
            os.path.join(ucrt_sdk_dir.include, "ucrt"),
        )
    )
    if dia_sdk_dir:
        includes.append(os.path.join(dia_sdk_dir, "include"))
    # Set in the environment for old-configure
    includes = ";".join(includes)
    os.environ["INCLUDE"] = includes
    return includes


set_config("INCLUDE", include_path)


@template
def dia_sdk_subdir(host_or_target, subdir):
    @depends(dia_sdk_dir, host_or_target, dependable(subdir))
    def dia_sdk_subdir(dia_sdk_dir, target, subdir):
        if not dia_sdk_dir:
            return
        # For some reason the DIA SDK still uses the old-style targets
        # even in a newer MSVC.
        old_target = {
            "x86": "",
            "x86_64": "amd64",
            "arm": "arm",
            "aarch64": "arm64",
        }.get(target.cpu)
        if old_target is None:
            return
        # As old_target can be '', and os.path.join will happily use the empty
        # string, leading to a string ending with a backslash, that Make will
        # interpret as a "string continues on next line" indicator, use variable
        # args.
        old_target = (old_target,) if old_target else ()
        return os.path.join(dia_sdk_dir, subdir, *old_target)

    return dia_sdk_subdir


set_config("WIN_DIA_SDK_BIN_DIR", dia_sdk_subdir(host, "bin"))


@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,
        dia_sdk_subdir(host_or_target, "lib"),
    )
    @imports("os")
    def lib_path(
        target, is_host, vc_path, windows_sdk_dir, ucrt_sdk_dir, dia_sdk_lib_dir
    ):
        if not vc_path:
            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 dia_sdk_lib_dir:
            libs.append(dia_sdk_lib_dir)
        return libs

    return lib_path


@depends_if(lib_path_for(target))
@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)
@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)
@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)