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conanfile.py
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# Flow
# Copyright 2023 Akamai Technologies, Inc.
#
# Licensed under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in
# compliance with the License. You may obtain a copy
# of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in
# writing, software distributed under the License is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
# CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing
# permissions and limitations under the License.
from conan import ConanFile
from conan.tools.build import build_jobs
from conan.tools.cmake import CMake, cmake_layout, CMakeDeps, CMakeToolchain
def load_version_from_file():
version_path = './VERSION'
with open(version_path, 'r') as version_file:
# Read the entire file content and strip whitespace (matches what FlowLikeProject.cmake does).
version = version_file.read().strip()
return version
class FlowRecipe(ConanFile):
name = "flow"
version = load_version_from_file()
settings = "os", "compiler", "build_type", "arch"
DOXYGEN_VERSION = "1.9.4"
options = {
"build": [True, False],
"build_no_lto": [True, False],
# 0 => default (let build script decide, as of this writing 17 meaning C++17) or a #, probably `20` as of
# this writing.
"build_cxx_std": ["ANY"],
"doc": [True, False]
}
default_options = {
"build": True,
"build_no_lto": False,
"build_cxx_std": 0,
"doc": False
}
def configure(self):
if self.options.build:
# Currently need all headers;
# plus libs: chrono, filesystem, program_options, thread, timer (and all headers).
# `filesystem` requires atomic. `thread` requires container, date_time, exception.
# (Boost provides the with_* way of specifying it also; the Conan Boost pkg only has without_*.)
self.options["boost"].without_charconv = True
self.options["boost"].without_cobalt = True
# TODO: The next line is commented out with the upgrade from 1.84 to 1.87; otherwise this happened
# when building Boost: ConanException:
# These libraries were built, but were not used in any boost module: {'boost_context'}
# Unclear what's up exactly; maybe some module we *do* need now requires `context` to itself build.
# Whatever... this gets rid of the problem. Look into it sometime though.
# self.options["boost"].without_context = True
self.options["boost"].without_contract = True
self.options["boost"].without_coroutine = True
self.options["boost"].without_fiber = True
self.options["boost"].without_graph = True
self.options["boost"].without_graph_parallel = True
self.options["boost"].without_iostreams = True
self.options["boost"].without_json = True
self.options["boost"].without_locale = True
self.options["boost"].without_log = True
self.options["boost"].without_math = True
self.options["boost"].without_mpi = True
self.options["boost"].without_nowide = True
self.options["boost"].without_python = True
self.options["boost"].without_random = True
self.options["boost"].without_regex = True
self.options["boost"].without_serialization = True
self.options["boost"].without_stacktrace = True
self.options["boost"].without_test = True
self.options["boost"].without_type_erasure = True
self.options["boost"].without_url = True
self.options["boost"].without_wave = True
def generate(self):
cmake = CMakeDeps(self)
if self.options.doc:
cmake.build_context_activated = [f"doxygen/{self.DOXYGEN_VERSION}"]
cmake.generate()
toolchain = CMakeToolchain(self)
if self.options.build:
toolchain.variables["CFG_ENABLE_TEST_SUITE"] = "ON"
if self.options.build_no_lto:
toolchain.variables["CFG_NO_LTO"] = "ON"
if self.options.build_cxx_std != 0:
toolchain.variables["CMAKE_CXX_STANDARD"] = self.options.build_cxx_std
else:
toolchain.variables["CFG_SKIP_CODE_GEN"] = "ON"
if self.options.doc:
toolchain.variables["CFG_ENABLE_DOC_GEN"] = "ON"
toolchain.generate()
def build(self):
cmake = CMake(self)
cmake.configure()
# Cannot use cmake.build(...) because not possible to pass make arguments like --keep-going.
if self.options.build:
self.run(f"cmake --build . -- --keep-going VERBOSE=1 -j{build_jobs(self)}")
if self.options.doc:
self.run(f"cmake --build . -- flow_doc_public flow_doc_full --keep-going VERBOSE=1 -j{build_jobs(self)}")
def requirements(self):
if self.options.build:
# Attention: This version of Boost is unfortunately as of this writing (1/14/2025) not
# in conan-center; 1.86 is the latest version in conan-center, with 1.87 PR
# (https://github.com/conan-io/conan-center-index/pull/26079) still open
# since 1.87's release ~1 month earlier. We try to get it manually for now, which is why the "@"
# is at the end there. To be clear, "it" is just the recipe (which wrangles Boost), not Boost
# itself. To make this work:
# - We grabbed the contents of the PR and placed the Boost-relevant parts (a handful of files
# under recipes/boost) directly in ./conan dir.
# - The pipeline .yml in .github, when wrangling Conan, installs that recipe manually.
# - Then the "@" here gets the desired Boost based on that locally-obtained recipe.
# TODO: Surely soon enough the version will be in conan-center, at which point:
# - Remove the "@" here.
# - Remove the `conan export` + related command(s) from the relevant `.yml`s.
# Spoiler alert: that's our main.yml and Flow-IPC's main.yml.
self.requires("boost/1.87.0@")
self.requires("fmt/11.0.2")
self.requires("gtest/1.15.0")
def build_requirements(self):
self.tool_requires("cmake/3.26.3")
if self.options.doc:
self.tool_requires(f"doxygen/{self.DOXYGEN_VERSION}")
def package(self):
cmake = CMake(self)
cmake.install()
def layout(self):
cmake_layout(self)
def layout(self):
cmake_layout(self)