conanfile.py

#############################################################################
##
## Copyright (C) 2021 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the release tools of the Qt Toolkit.
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## GNU General Public License Usage
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## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
## included in the packaging of this file. Please review the following
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#############################################################################

from conans import ConanFile, tools, Options
from conans.errors import ConanInvalidConfiguration
import os
import re
import json
import shutil
import subprocess
from functools import lru_cache
from pathlib import Path
from typing import Dict, List, Any, Optional


class QtConanError(Exception):
    pass


class QtConfigureOption(object):
    def __init__(self, name: str, type: str, values: List[Any], default: Any):
        self.name = name
        self.type = type
        self.conan_option_name = self.convert_to_conan_option_name(name)

        if type == "enum" and set(values) == {"yes", "no"}:
            self._binary_option = True  # matches to Conan option "yes"|"no"
            values = []
            self._prefix = "-"
            self._value_delim = ""
        elif "string" in type.lower() or type in ["enum", "cxxstd", "coverage", "sanitize"]:
            # these options have a value, e.g.
            #  --zlib=qt  (enum type)
            #  --c++std=c++17  (cxxstd type)
            #  --prefix=/foo
            self._binary_option = False
            self._prefix = "--"
            self._value_delim = "="
            # exception to the rule
            if name == "qt-host-path":
                self._prefix = "-"
                self._value_delim = " "
        else:
            # e.g. -debug (void type)
            self._binary_option = True
            self._prefix = "-"
            self._value_delim = ""

        if not self._binary_option and not values:
            self.possible_values = ["ANY"]
        elif type == "addString":
            # -make=libs -make=examples <-> -o make="libs;examples" i.e. the possible values
            # can be randomly selected values in semicolon separated list -> "ANY"
            self.possible_values = ["ANY"]
        else:
            self.possible_values = values

        if self._binary_option and self.possible_values:
            raise QtConanError(
                "A binary option: '{0}' can not contain values: {1}".format(
                    name, self.possible_values
                )
            )

        self.default = default

    @property
    def binary_option(self) -> bool:
        return self._binary_option

    @property
    def incremental_option(self) -> bool:
        return self.type == "addString"

    @property
    def prefix(self) -> str:
        return self._prefix

    @property
    def value_delim(self) -> str:
        return self._value_delim

    def convert_to_conan_option_name(self, qt_configure_option: str) -> str:
        # e.g. '-c++std' -> '-cxxstd' or '-cmake-generator' -> 'cmake_generator'
        return qt_configure_option.lstrip("-").replace("-", "_").replace("+", "x")

    def get_conan_option_values(self) -> Any:
        # The 'None' is added as a possible value. For Conan this means it is not mandatory to pass
        # this option for the build.
        if self._binary_option:
            return [True, False, None]
        if self.possible_values == ["ANY"]:
            # For 'ANY' value it can not be a List type for Conan
            return "ANY"
        return self.possible_values + [None]  # type: ignore

    def get_default_conan_option_value(self) -> Any:
        return self.default


class QtOptionParser:
    def __init__(self) -> None:
        self.options: List[QtConfigureOption] = []
        self.load_configure_options()
        self.extra_options: Dict[str, Any] = {"cmake_args_qtbase": "ANY"}
        self.extra_options_default_values = {"cmake_args_qtbase": None}

    def load_configure_options(self) -> None:
        """Read the configure options and features dynamically via configure(.bat).
        There are two contexts where the ConanFile is initialized:
          - 'conan export' i.e. when the conan package is being created from sources (.git)
          - inside conan's cache when invoking: 'conan install, conan info, conan inspect, ..'
        """
        print("QtOptionParser: load configure options ..")
        recipe_folder = Path(__file__).parent.resolve()
        configure_options = recipe_folder / "configure_options.json"
        configure_features = recipe_folder / "configure_features.txt"
        if not configure_options.exists() or not configure_features.exists():
            # This is when the 'conan export' is called
            script = Path("configure.bat") if tools.os_info.is_windows else Path("configure")
            root_path = recipe_folder

            configure = root_path.joinpath(script).resolve()
            if not configure.exists():
                root_path = root_path.joinpath("..").joinpath("export_source").resolve()
                if root_path.exists():
                    configure = root_path.joinpath(script).resolve(strict=True)
                else:
                    raise QtConanError(
                        "Unable to locate 'configure(.bat)' "
                        "from current context: {0}".format(recipe_folder)
                    )

            self.write_configure_options(configure, output_file=configure_options)
            self.write_configure_features(configure, output_file=configure_features)

        opt = self.read_configure_options(configure_options)
        self.set_configure_options(opt["options"])

        features = self.read_configure_features(configure_features)
        self.set_features(feature_name_prefix="feature-", features=features)

    def write_configure_options(self, configure: Path, output_file: Path) -> None:
        print("QtOptionParser: writing Qt configure options to: {0}".format(output_file))
        cmd = [str(configure), "-write-options-for-conan", str(output_file)]
        subprocess.run(cmd, check=True, timeout=60 * 2)

    def read_configure_options(self, input_file: Path) -> Dict[str, Any]:
        print("QtOptionParser: reading Qt configure options from: {0}".format(input_file))
        with open(str(input_file)) as f:
            return json.load(f)

    def write_configure_features(self, configure: Path, output_file: Path) -> None:
        print("QtOptionParser: writing Qt configure features to: {0}".format(output_file))
        cmd = [str(configure), "-list-features"]
        with open(output_file, "w") as f:
            subprocess.run(
                cmd,
                encoding="utf-8",
                check=True,
                timeout=60 * 2,
                stderr=subprocess.STDOUT,
                stdout=f,
            )

    def read_configure_features(self, input_file: Path) -> List[str]:
        print("QtOptionParser: reading Qt configure features from: {0}".format(input_file))
        with open(str(input_file)) as f:
            return f.readlines()

    def set_configure_options(self, configure_options: Dict[str, Any]) -> None:
        for option_name, field in configure_options.items():
            option_type = field.get("type")
            values: List[str] = field.get("values", [])
            # For the moment all Options will get 'None' as the default value
            default = None

            if not option_type:
                raise QtConanError(
                    "Qt 'configure(.bat) -write-options-for-conan' produced output "
                    "that is missing 'type'. Unable to set options dynamically. "
                    "Item: {0}".format(option_name)
                )
            if not isinstance(values, list):
                raise QtConanError("The 'values' field is not a list: {0}".format(option_name))
            if option_type == "enum" and not values:
                raise QtConanError("The enum values are missing for: {0}".format(option_name))

            opt = QtConfigureOption(
                name=option_name, type=option_type, values=values, default=default
            )
            self.options.append(opt)

    def set_features(self, feature_name_prefix: str, features: List[str]) -> None:
        for line in features:
            feature_name = self.parse_feature(line)
            if feature_name:
                opt = QtConfigureOption(
                    name=feature_name_prefix + feature_name, type="void", values=[], default=None
                )
                self.options.append(opt)

    def parse_feature(self, feature_line: str) -> Optional[str]:
        parts = feature_line.split()
        # e.g. 'itemmodel ................ ItemViews: Provides the item model for item views'
        if not len(parts) >= 3:
            return None
        if not parts[1].startswith("."):
            return None
        return parts[0]

    def get_qt_conan_options(self) -> Dict[str, Any]:
        # obtain all the possible configure(.bat) options and map those to
        # Conan options for the recipe
        opt: Dict = {}
        for qt_option in self.options:
            opt[qt_option.conan_option_name] = qt_option.get_conan_option_values()
        opt.update(self.extra_options)
        return opt

    def get_default_qt_conan_options(self) -> Dict[str, Any]:
        # set the default option values for each option in case the user or CI does not pass them
        opt: Dict = {}
        for qt_option in self.options:
            opt[qt_option.conan_option_name] = qt_option.get_default_conan_option_value()
        opt.update(self.extra_options_default_values)
        return opt

    def is_used_option(self, conan_options: Options, option_name: str) -> bool:
        # conan install ... -o release=False -> configure(.bat)
        # conan install ...                  -> configure(.bat)
        # conan install ... -o release=True  -> configure(.bat) -release
        return bool(conan_options.get_safe(option_name))

    def convert_conan_option_to_qt_option(
        self, conan_options: Options, name: str, value: Any
    ) -> str:
        ret: str = ""

        def _find_qt_option(conan_option_name: str) -> QtConfigureOption:
            for qt_opt in self.options:
                if conan_option_name == qt_opt.conan_option_name:
                    return qt_opt
            else:
                raise QtConanError(
                    "Could not find a matching Qt configure option for: {0}".format(
                        conan_option_name
                    )
                )

        def _is_excluded_from_configure() -> bool:
            # extra options are not Qt configure(.bat) options but those exist as
            # conan recipe options which are treated outside Qt's configure(.bat)
            if name in self.extra_options.keys():
                return True
            return False

        if self.is_used_option(conan_options, name) and not _is_excluded_from_configure():
            qt_option = _find_qt_option(name)
            if qt_option.incremental_option:
                # e.g. -make=libs -make=examples <-> -o make=libs;examples;foo;bar
                _opt = qt_option.prefix + qt_option.name + qt_option.value_delim
                ret = " ".join(_opt + item.strip() for item in value.split(";") if item.strip())
            else:
                ret = qt_option.prefix + qt_option.name
                if not qt_option.binary_option:
                    ret += qt_option.value_delim + value

        return ret

    def convert_conan_options_to_qt_options(self, conan_options: Options) -> List[str]:
        qt_options: List[str] = []

        def _option_enabled(opt: str) -> bool:
            return bool(conan_options.get_safe(opt))

        def _option_disabled(opt: str) -> bool:
            return not bool(conan_options.get_safe(opt))

        def _filter_overlapping_options() -> None:
            if _option_enabled("shared") or _option_disabled("static"):
                delattr(conan_options, "static")  # should result only into "-shared"
            if _option_enabled("static") or _option_disabled("shared"):
                delattr(conan_options, "shared")  # should result only into "-static"

        _filter_overlapping_options()

        for option_name, option_value in conan_options.items():
            qt_option = self.convert_conan_option_to_qt_option(
                conan_options=conan_options, name=option_name, value=option_value
            )
            if not qt_option:
                continue
            qt_options.append(qt_option)
        return qt_options

    def get_cmake_args_for_configure(self, conan_options: Options) -> List[Optional[str]]:
        ret: List[Optional[str]] = []
        for option_name, option_value in conan_options.items():
            if option_name == "cmake_args_qtbase" and self.is_used_option(
                conan_options, option_name
            ):
                ret = [ret for ret in option_value.strip(r" '\"").split()]
        return ret


def add_cmake_prefix_path(conan_file: ConanFile, dep: str) -> None:
    if dep not in conan_file.deps_cpp_info.deps:
        raise QtConanError("Unable to find dependency: {0}".format(dep))
    dep_cpp_info = conan_file.deps_cpp_info[dep]
    cmake_args_str = str(conan_file.options.get_safe("cmake_args_qtbase", default=""))
    formatted_cmake_args_str = conan_file._shared.append_cmake_prefix_path(
        cmake_args_str, dep_cpp_info.rootpath
    )
    print("Adjusted cmake args for qtbase build: {0}".format(formatted_cmake_args_str))
    setattr(conan_file.options, "cmake_args_qtbase", formatted_cmake_args_str)


def _build_qtbase(conan_file: ConanFile):
    # we call the Qt's configure(.bat) directly
    script = Path("configure.bat") if tools.os_info.is_windows else Path("configure")
    configure = Path(conan_file.build_folder).joinpath(script).resolve(strict=True)

    if conan_file.options.get_safe("icu", default=False):
        # we need to tell Qt build system where to find the ICU
        add_cmake_prefix_path(conan_file, dep="icu")

    # convert the Conan options to Qt configure(.bat) arguments
    parser = conan_file._qt_option_parser
    qt_configure_options = parser.convert_conan_options_to_qt_options(conan_file.options)
    cmd = " ".join(
        [str(configure), " ".join(qt_configure_options), "-prefix", conan_file.package_folder]
    )
    cmake_args = parser.get_cmake_args_for_configure(conan_file.options)
    if cmake_args:
        cmd += " -- {0}".format(" ".join(cmake_args))
    conan_file.output.info("Calling: {0}".format(cmd))
    conan_file.run(cmd)

    cmd = " ".join(["cmake", "--build", ".", "--parallel"])
    conan_file.output.info("Calling: {0}".format(cmd))
    conan_file.run(cmd)


@lru_cache(maxsize=8)
def _parse_qt_version_by_key(key: str) -> str:
    with open(Path(__file__).parent.resolve() / ".cmake.conf") as f:
        m = re.search(fr'{key} .*"(.*)"', f.read())
    return m.group(1) if m else ""


def _get_qt_minor_version() -> str:
    return ".".join(_parse_qt_version_by_key("QT_REPO_MODULE_VERSION").split(".")[:2])


class QtBase(ConanFile):
    name = "qtbase"
    license = "LGPL-3.0, GPL-2.0+, Commercial Qt License Agreement"
    author = "The Qt Company <https://www.qt.io/contact-us>"
    url = "https://code.qt.io/cgit/qt/qtbase.git"
    description = "Qt6 core framework libraries and tools."
    topics = ("qt", "qt6")
    settings = "os", "compiler", "arch", "build_type"
    _qt_option_parser = QtOptionParser()
    options = _qt_option_parser.get_qt_conan_options()
    default_options = _qt_option_parser.get_default_qt_conan_options()
    exports_sources = "*", "!conan*.*"
    # use commit ID as the RREV (recipe revision)
    revision_mode = "scm"
    python_requires = "qt-conan-common/{0}@qt/everywhere".format(_get_qt_minor_version())
    short_paths = True
    _shared = None

    def init(self):
        self._shared = self.python_requires["qt-conan-common"].module

    def set_version(self):
        # Executed during "conan export" i.e. in source tree
        _ver = _parse_qt_version_by_key("QT_REPO_MODULE_VERSION")
        _prerelease = _parse_qt_version_by_key("QT_REPO_MODULE_PRERELEASE_VERSION_SEGMENT")
        self.version = _ver + "-" + _prerelease if _prerelease else _ver

    def export(self):
        self.copy("configure_options.json")
        self.copy("configure_features.txt")
        self.copy(".cmake.conf")
        conf = self._shared.qt_sw_versions_config_folder() / self._shared.qt_sw_versions_config_name()
        if not conf.exists():
            # If using "conan export" outside Qt CI provisioned machines
            print("Warning: Couldn't find '{0}'. 3rd party dependencies skipped.".format(conf))
        else:
            shutil.copy2(conf, self.export_folder)

    def requirements(self):
        # list of tuples, (package_name, fallback version)
        optional_requirements = [("icu", "56.1")]
        for req_name, req_ver_fallback in optional_requirements:
            if self.options.get_safe(req_name, default=False) == True:
                # Note! If this conan package is being "conan export"ed outside Qt CI and the
                # sw versions .ini file is not present then it will fall-back to default version
                ver = self._shared.parse_sw_req(
                    config_folder=Path(self.recipe_folder),
                    package_name=req_name,
                    target_os=str(self.settings.os),
                )
                if not ver:
                    print(
                        "Warning: Using fallback version '{0}' for: {1}".format(
                            req_name, req_ver_fallback
                        )
                    )
                    ver = req_ver_fallback
                requirement = "{0}/{1}@qt/everywhere".format(req_name, ver)
                print("Setting 3rd party package requirement: {0}".format(requirement))
                self.requires(requirement)

    def configure(self):
        if self.settings.compiler == "gcc" and tools.Version(self.settings.compiler.version) < "8":
            raise ConanInvalidConfiguration("Qt6 does not support GCC before 8")

        def _set_default_if_not_set(option_name: str, option_value: bool) -> None:
            # let it fail if option name does not exist, it means the recipe is not up to date
            if self.options.get_safe(option_name) in [None, "None"]:
                setattr(self.options, option_name, option_value)

        def _set_build_type(build_type: str) -> None:
            if self.settings.build_type != build_type:
                msg = (
                    "The build_type '{0}' changed to '{1}'. Please check your Settings and "
                    "Options. The used Qt options enforce '{2}' as a build_type. ".format(
                        self.settings.build_type, build_type, build_type
                    )
                )
                raise QtConanError(msg)
            self.settings.build_type = build_type

        def _check_mutually_exclusive_options(options: Dict[str, bool]) -> None:
            if list(options.values()).count(True) > 1:
                raise QtConanError(
                    "These Qt options are mutually exclusive: {0}"
                    ". Choose only one of them and try again.".format(list(options.keys()))
                )

        default_options = ["shared", "gui", "widgets", "accessibility", "system_proxies", "ico"]

        if self.settings.os == "Macos":
            default_options.append("framework")

        for item in default_options:
            _set_default_if_not_set(item, True)

        release = self.options.get_safe("release", default=False)
        debug = self.options.get_safe("debug", default=False)
        debug_and_release = self.options.get_safe("debug_and_release", default=False)
        force_debug_info = self.options.get_safe("force_debug_info", default=False)
        optimize_size = self.options.get_safe("optimize_size", default=False)

        # these options are mutually exclusive options so do a sanity check
        _check_mutually_exclusive_options(
            {"release": release, "debug": debug, "debug_and_release": debug_and_release}
        )

        # Prioritize Qt's configure options over Settings.build_type
        if debug_and_release == True:
            # Qt build system will build both debug and release binaries
            if force_debug_info == True:
                _set_build_type("RelWithDebInfo")
            else:
                _set_build_type("Release")
        elif release == True:
            _check_mutually_exclusive_options(
                {"force_debug_info": force_debug_info, "optimize_size": optimize_size}
            )
            if force_debug_info == True:
                _set_build_type("RelWithDebInfo")
            elif optimize_size == True:
                _set_build_type("MinSizeRel")
            else:
                _set_build_type("Release")
        elif debug == True:
            _set_build_type("Debug")
        else:
            # As a fallback set the build type for Qt configure based on the 'build_type'
            # defined in the conan build settings
            build_type = self.settings.get_safe("build_type")
            if build_type in [None, "None"]:
                # set default that mirror the configure(.bat) default values
                self.options.release = True
                self.settings.build_type = "Release"
            elif build_type == "Release":
                self.options.release = True
            elif build_type == "Debug":
                self.options.debug = True
            elif build_type == "RelWithDebInfo":
                self.options.release = True
                self.options.force_debug_info = True
            elif build_type == "MinSizeRel":
                self.options.release = True
                self.options.optimize_size = True
            else:
                raise QtConanError("Unknown build_type: {0}".format(self.settings.build_type))

    def build(self):
        self._shared.build_env_wrap(self, _build_qtbase)

    def package(self):
        self._shared.call_install(self)

    def package_info(self):
        self._shared.package_info(self)
        if tools.cross_building(conanfile=self):
            qt_host_path = self.options.get_safe("qt_host_path")
            if qt_host_path is None:
                raise QtConanError("Unable to cross-compile, 'qt_host_path' option missing?")
            resolved_qt_host_path = str(
                Path(os.path.expandvars(str(qt_host_path))).expanduser().resolve(strict=True)
            )
            self.env_info.QT_HOST_PATH.append(resolved_qt_host_path)

    def package_id(self):
        # https://docs.conan.io/en/latest/creating_packages/define_abi_compatibility.html

        # The package_revision_mode() is too strict for Qt CI. This mode includes artifacts
        # checksum in package_id which is problematic in Qt CI re-runs (re-run flaky
        # build) which contain different build timestamps (cmake) which end up in library
        # files -> different package_id.
        self.info.requires.recipe_revision_mode()

        # Enable 'qt-conan-common' updates on client side with $conan install .. --update
        self.info.python_requires.recipe_revision_mode()

        if self.settings.os == "Android":
            self.filter_package_id_for_android()

        # Remove those configure(.bat) options which should not affect package_id.
        # These point to local file system paths and in order to re-use pre-built
        # binaries (by Qt CI) by others these should not affect the 'package_id'
        # as those probably differ on each machine
        rm_list = [
            "sdk",
            "qpa",
            "translationsdir",
            "headersclean",
            "qt_host_path",
        ]
        for item in rm_list:
            if item in self.info.options:
                delattr(self.info.options, item)
        # filter also those cmake options that should not end up in the package_id
        if hasattr(self.info.options, "cmake_args_qtbase"):
            _filter = self._shared.filter_cmake_args_for_package_id
            self.info.options.cmake_args_qtbase = _filter(self.info.options.cmake_args_qtbase)

   def filter_package_id_for_android(self) -> None:
        # Instead of using Android NDK path as the option value (package_id) we parse the
        # actual version number and use that as the option value.
        android_ndk = self.options.get_safe("android_ndk")
        if android_ndk:
            v = self._shared.parse_android_ndk_version(search_path=android_ndk)
            print("Set 'android_ndk={0}' for package_id. Parsed from: {1}".format(android_ndk, v))
            setattr(self.options, "android_ndk", v)

        # If -DQT_ANDROID_API_VERSION is defined then prefer that value for package_id
        qtbase_cmake_args = self.options.get_safe("cmake_args_qtbase")
        m = re.search(r"QT_ANDROID_API_VERSION=(\S*)", qtbase_cmake_args)
        if m:
            android_api_ver = m.group(1).strip()
            print("Using QT_ANDROID_API_VERSION='{0}' for package_id".format(android_api_ver))
            setattr(self.options, "android_sdk", android_api_ver)
        else:
            # TODO, for now we have no clean means to query the Android SDK version
            # from Qt build system so we just exclude the "android_sdk" from the
            # package_id.
            delattr(self.info.options, "android_sdk")

    def deploy(self):
        self.copy("*")  # copy from current package
        self.copy_deps("*")  # copy from dependencies