from conan import ConanFile from conan.errors import ConanInvalidConfiguration from conan.tools.apple import is_apple_os from conan.tools.build import check_min_cppstd from conan.tools.cmake import CMake, CMakeToolchain, cmake_layout from conan.tools.files import export_conandata_patches, apply_conandata_patches, copy, get, load, rmdir, save from conan.tools.microsoft import is_msvc, is_msvc_static_runtime from conan.tools.scm import Version import json import os import re required_conan_version = ">=2.1" class AbseilConan(ConanFile): name = "abseil" description = "Abseil Common Libraries (C++) from Google" topics = ("algorithm", "container", "google", "common", "utility") homepage = "https://github.com/abseil/abseil-cpp" url = "https://github.com/conan-io/conan-center-index" license = "Apache-2.0" package_type = "library" settings = "os", "arch", "compiler", "build_type" options = { "shared": [True, False], "fPIC": [True, False], } default_options = { "shared": False, "fPIC": True, } short_paths = True extension_properties = {"compatibility_cppstd": False} def export_sources(self): export_conandata_patches(self) def config_options(self): if self.settings.os == "Windows": del self.options.fPIC def configure(self): if self.options.shared: self.options.rm_safe("fPIC") def validate(self): minimum_cppstd = 17 if self.version >= Version("20250512.1") else 14 check_min_cppstd(self, minimum_cppstd) if self.options.shared and is_msvc(self) and Version(self.version) < "20230802.1": # upstream tries its best to export symbols, but it's broken for the moment raise ConanInvalidConfiguration(f"{self.ref} shared not availabe for Visual Studio, please use version 20230802.1 or newer") def build_requirements(self): # https://github.com/abseil/abseil-cpp/blob/20240722.0/CMakeLists.txt#L19 if Version(self.version) >= "20240722.0": self.tool_requires("cmake/[>=3.16]") def layout(self): cmake_layout(self, src_folder="src") def source(self): get(self, **self.conan_data["sources"][self.version], strip_root=True) apply_conandata_patches(self) def generate(self): tc = CMakeToolchain(self) tc.cache_variables["ABSL_ENABLE_INSTALL"] = True tc.cache_variables["ABSL_PROPAGATE_CXX_STD"] = True tc.cache_variables["BUILD_TESTING"] = False if self.settings.os == "Windows" and self.settings.compiler in ["msvc", "clang"] and self.settings.get_safe("compiler.runtime"): runtime = str(self.settings.compiler.runtime) tc.cache_variables["ABSL_MSVC_STATIC_RUNTIME"] = runtime == "static" tc.generate() def build(self): cmake = CMake(self) cmake.configure() cmake.build() def package(self): copy(self, "LICENSE", src=self.source_folder, dst=os.path.join(self.package_folder, "licenses")) cmake = CMake(self) cmake.install() rmdir(self, os.path.join(self.package_folder, "lib", "pkgconfig")) # Load components hierarchy before removing CMake files generated by abseil installation cmake_folder = os.path.join(self.package_folder, "lib", "cmake") absl_targets_file = os.path.join(cmake_folder, "absl", "abslTargets.cmake") components = self._load_components_from_cmake_target_file(absl_targets_file) rmdir(self, cmake_folder) # Create a json helper file in order to populate package_info() at consume time self._create_components_file(self._components_helper_filepath, components) def _load_components_from_cmake_target_file(self, absl_target_file_path): components = {} abs_target_content = load(self, absl_target_file_path) # Replace the line endings to support building with MSys2 on Windows abs_target_content = abs_target_content.replace("\r\n", "\n") cmake_functions = re.findall(r"(?Padd_library|set_target_properties)[\n|\s]*\([\n|\s]*(?P[^)]*)\)", abs_target_content) for (cmake_function_name, cmake_function_args) in cmake_functions: cmake_function_args = re.split(r"[\s|\n]+", cmake_function_args, maxsplit=2) cmake_imported_target_name = cmake_function_args[0] cmake_target_nonamespace = cmake_imported_target_name.replace("absl::", "") potential_lib_name = "absl_" + cmake_target_nonamespace components.setdefault(potential_lib_name, {"cmake_target": cmake_target_nonamespace}) if cmake_function_name == "add_library": cmake_imported_target_type = cmake_function_args[1] if cmake_imported_target_type in ["STATIC", "SHARED"]: components[potential_lib_name]["libs"] = [potential_lib_name] if cmake_target_nonamespace != "abseil_dll" else ['abseil_dll'] elif cmake_function_name == "set_target_properties": target_properties = re.findall(r"(?PINTERFACE_COMPILE_DEFINITIONS|INTERFACE_INCLUDE_DIRECTORIES|INTERFACE_LINK_LIBRARIES)[\n|\s]+(?P.+)", cmake_function_args[2]) for target_property in target_properties: property_type = target_property[0] if property_type == "INTERFACE_LINK_LIBRARIES": values_list = target_property[1].replace('"', "").split(";") for dependency in values_list: if dependency.startswith("absl::"): # abseil targets components[potential_lib_name].setdefault("requires", []).append(dependency.replace("absl::", "absl_")) else: # system libs or frameworks if self.settings.os in ["Linux", "FreeBSD"]: if dependency == "Threads::Threads": components[potential_lib_name].setdefault("system_libs", []).append("pthread") elif "-lm" in dependency: components[potential_lib_name].setdefault("system_libs", []).append("m") elif "-lrt" in dependency: components[potential_lib_name].setdefault("system_libs", []).append("rt") elif self.settings.os == "Windows": for system_lib in ["bcrypt", "advapi32", "dbghelp"]: if system_lib in dependency: components[potential_lib_name].setdefault("system_libs", []).append(system_lib) elif is_apple_os(self): for framework in ["CoreFoundation"]: if framework in dependency: components[potential_lib_name].setdefault("frameworks", []).append(framework) elif property_type == "INTERFACE_COMPILE_DEFINITIONS": values_list = target_property[1].replace('"', "").split(";") for definition in values_list: if definition == r"\$<\$:_LINUX_SOURCE_COMPAT>": if self.settings.os == "AIX": components[potential_lib_name].setdefault("defines", []).append("_LINUX_SOURCE_COMPAT") else: components[potential_lib_name].setdefault("defines", []).append(definition) return components def _create_components_file(self, output_file, components): content = json.dumps(components, indent=4) save(self, output_file, content) @property def _components_helper_filepath(self): return os.path.join(self.package_folder, "lib", "components.json") def package_info(self): self.cpp_info.set_property("cmake_file_name", "absl") components_json_file = load(self, self._components_helper_filepath) abseil_components = json.loads(components_json_file) for pkgconfig_name, values in abseil_components.items(): cmake_target = values["cmake_target"] self.cpp_info.components[pkgconfig_name].set_property("cmake_target_name", "absl::{}".format(cmake_target)) self.cpp_info.components[pkgconfig_name].set_property("pkg_config_name", pkgconfig_name) self.cpp_info.components[pkgconfig_name].libs = values.get("libs", []) self.cpp_info.components[pkgconfig_name].defines = values.get("defines", []) self.cpp_info.components[pkgconfig_name].system_libs = values.get("system_libs", []) self.cpp_info.components[pkgconfig_name].frameworks = values.get("frameworks", []) self.cpp_info.components[pkgconfig_name].requires = values.get("requires", [])