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flatbuffers/all/conanfile.py
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158
flatbuffers/all/conanfile.py
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from conan import ConanFile
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from conan.tools.apple import is_apple_os
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from conan.tools.build import check_min_cppstd, valid_min_cppstd
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from conan.tools.cmake import CMake, CMakeToolchain, cmake_layout
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from conan.tools.files import export_conandata_patches, apply_conandata_patches, collect_libs, copy, get, replace_in_file, rmdir
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from conan.tools.scm import Version
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import os
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required_conan_version = ">=2.1"
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class FlatbuffersConan(ConanFile):
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name = "flatbuffers"
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license = "Apache-2.0"
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url = "https://github.com/conan-io/conan-center-index"
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homepage = "http://google.github.io/flatbuffers"
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topics = ("serialization", "rpc", "json-parser")
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description = "Memory Efficient Serialization Library"
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settings = "os", "arch", "compiler", "build_type"
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package_type = "library"
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options = {
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"shared": [True, False],
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"fPIC": [True, False],
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"header_only": [True, False],
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}
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default_options = {
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"shared": False,
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"fPIC": True,
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"header_only": False,
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}
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def _has_flatc(self, info=False):
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# don't build flatc when it makes little sense or not supported
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host_os = self.info.settings.os if info else self.settings.os
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return host_os not in ["Android", "iOS", "watchOS", "tvOS", "Neutrino"]
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def export_sources(self):
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copy(self, os.path.join("cmake", "FlatcTargets.cmake"), self.recipe_folder, self.export_sources_folder)
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export_conandata_patches(self)
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def config_options(self):
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if self.settings.os == "Windows":
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del self.options.fPIC
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def configure(self):
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if self.options.shared or self.options.header_only:
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self.options.rm_safe("fPIC")
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if self.options.header_only:
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del self.options.shared
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def layout(self):
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cmake_layout(self, src_folder="src")
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def package_id(self):
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if self.info.options.header_only and not self._has_flatc(info=True):
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self.info.clear()
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def validate(self):
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check_min_cppstd(self, 11)
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def build_requirements(self):
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# since 23.3.3 version, flatbuffers cmake scripts were refactored to use cmake 3.8 version
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# see https://github.com/google/flatbuffers/pull/7801
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if Version(self.version) >= "2.0.8" and Version(self.version) < "23.3.3":
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self.tool_requires("cmake/[>=3.16 <4]")
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def source(self):
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get(self, **self.conan_data["sources"][self.version], strip_root=True)
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self._patch_sources()
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def generate(self):
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tc = CMakeToolchain(self)
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tc.variables["FLATBUFFERS_BUILD_TESTS"] = False
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tc.variables["FLATBUFFERS_INSTALL"] = True
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tc.variables["FLATBUFFERS_BUILD_FLATLIB"] = not self.options.header_only and not self.options.shared
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tc.variables["FLATBUFFERS_BUILD_FLATC"] = self._has_flatc()
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tc.variables["FLATBUFFERS_STATIC_FLATC"] = False
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tc.variables["FLATBUFFERS_BUILD_FLATHASH"] = False
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tc.variables["FLATBUFFERS_BUILD_SHAREDLIB"] = not self.options.header_only and self.options.shared
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# Honor conan profile
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tc.variables["FLATBUFFERS_LIBCXX_WITH_CLANG"] = False
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# Mimic upstream CMake/Version.cmake removed in _patch_sources()
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version = Version(self.version)
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tc.cache_variables["VERSION_MAJOR"] = str(version.major)
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tc.cache_variables["VERSION_MINOR"] = str(version.minor or "0")
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tc.cache_variables["VERSION_PATCH"] = str(version.patch or "0")
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tc.cache_variables["VERSION_COMMIT"] = str(version.pre or "0")
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# For msvc shared
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tc.variables["CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS"] = True
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# Relocatable shared libs on Macos
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tc.cache_variables["CMAKE_POLICY_DEFAULT_CMP0042"] = "NEW"
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# Fix iOS/tvOS/watchOS
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if is_apple_os(self):
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tc.variables["CMAKE_MACOSX_BUNDLE"] = False
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tc.generate()
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def _patch_sources(self):
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apply_conandata_patches(self)
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cmakelists = os.path.join(self.source_folder, "CMakeLists.txt")
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# Prefer manual injection of current version in build(), otherwise it tries to call git
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replace_in_file(self, cmakelists, "include(CMake/Version.cmake)", "")
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# No warnings as errors
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replace_in_file(self, cmakelists, "/WX", "")
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replace_in_file(self, cmakelists, "-Werror ", "")
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# Install dll to bin folder
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replace_in_file(self, cmakelists,
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"RUNTIME DESTINATION ${CMAKE_INSTALL_LIBDIR}",
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"RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}")
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def build(self):
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cmake = CMake(self)
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cmake.configure()
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cmake.build()
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def package(self):
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copy(self, "LICENSE*", src=self.source_folder, dst=os.path.join(self.package_folder, "licenses"))
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cmake = CMake(self)
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cmake.install()
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rmdir(self, os.path.join(self.package_folder, "lib", "cmake"))
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rmdir(self, os.path.join(self.package_folder, "lib", "pkgconfig"))
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copy(self, "FlatcTargets.cmake",
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src=os.path.join(self.source_folder, os.pardir, "cmake"),
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dst=os.path.join(self.package_folder, self._module_path))
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copy(self, "BuildFlatBuffers.cmake",
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src=os.path.join(self.source_folder, "CMake"),
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dst=os.path.join(self.package_folder, self._module_path))
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@property
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def _module_path(self):
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return os.path.join("lib", "cmake")
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def package_info(self):
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self.cpp_info.set_property("cmake_find_mode", "both")
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self.cpp_info.set_property("cmake_module_file_name", "flatbuffers")
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self.cpp_info.set_property("cmake_file_name", "flatbuffers")
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cmake_target = "flatbuffers"
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if not self.options.header_only and self.options.shared:
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cmake_target += "_shared"
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self.cpp_info.set_property("cmake_target_name", f"flatbuffers::{cmake_target}")
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self.cpp_info.set_property("pkg_config_name", "flatbuffers")
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# TODO: back to global scope in conan v2 once cmake_find_package* generators removed
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if not self.options.header_only:
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self.cpp_info.components["libflatbuffers"].libs = collect_libs(self)
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if self.settings.os in ["Linux", "FreeBSD"]:
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self.cpp_info.components["libflatbuffers"].system_libs.append("m")
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# Provide flatbuffers::flatc target and CMake functions from BuildFlatBuffers.cmake
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build_modules = [
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os.path.join(self._module_path, "FlatcTargets.cmake"),
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os.path.join(self._module_path, "BuildFlatBuffers.cmake"),
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]
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self.cpp_info.set_property("cmake_build_modules", build_modules)
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if self._has_flatc():
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self.env_info.PATH.append(os.path.join(self.package_folder, "bin"))
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