conanfile.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""Conan recipe package for Google FlatBuffers"""
import os
import shutil
from conans import CMake, ConanFile, tools


class FlatbuffersConan(ConanFile):
  name = "flatbuffers"
  license = "Apache-2.0"
  url = "https://github.com/google/flatbuffers"
  homepage = "http://google.github.io/flatbuffers/"
  author = "Wouter van Oortmerssen"
  topics = ("conan", "flatbuffers", "serialization", "rpc", "json-parser")
  description = "Memory Efficient Serialization Library"
  settings = "os", "compiler", "build_type", "arch"
  options = {"shared": [True, False], "fPIC": [True, False]}
  default_options = {"shared": False, "fPIC": True}
  generators = "cmake"
  exports = "LICENSE"
  exports_sources = [
      "CMake/*",
      "include/*",
      "src/*",
      "grpc/*",
      "CMakeLists.txt",
      "conan/CMakeLists.txt",
  ]

  def source(self):
    """Wrap the original CMake file to call conan_basic_setup"""
    shutil.move("CMakeLists.txt", "CMakeListsOriginal.txt")
    shutil.move(os.path.join("conan", "CMakeLists.txt"), "CMakeLists.txt")

  def config_options(self):
    """Remove fPIC option on Windows platform"""
    if self.settings.os == "Windows":
      self.options.remove("fPIC")

  def configure_cmake(self):
    """Create CMake instance and execute configure step"""
    cmake = CMake(self)
    cmake.definitions["FLATBUFFERS_BUILD_TESTS"] = False
    cmake.definitions["FLATBUFFERS_BUILD_SHAREDLIB"] = self.options.shared
    cmake.definitions["FLATBUFFERS_BUILD_FLATLIB"] = not self.options.shared
    cmake.configure()
    return cmake

  def build(self):
    """Configure, build and install FlatBuffers using CMake."""
    cmake = self.configure_cmake()
    cmake.build()

  def package(self):
    """Copy Flatbuffers' artifacts to package folder"""
    cmake = self.configure_cmake()
    cmake.install()
    self.copy(pattern="LICENSE", dst="licenses")
    self.copy(
        pattern="FindFlatBuffers.cmake",
        dst=os.path.join("lib", "cmake", "flatbuffers"),
        src="CMake",
    )
    self.copy(pattern="flathash*", dst="bin", src="bin")
    self.copy(pattern="flatc*", dst="bin", src="bin")
    if self.settings.os == "Windows" and self.options.shared:
      if self.settings.compiler == "Visual Studio":
        shutil.move(
            os.path.join(self.package_folder, "lib", "%s.dll" % self.name),
            os.path.join(self.package_folder, "bin", "%s.dll" % self.name),
        )
      elif self.settings.compiler == "gcc":
        shutil.move(
            os.path.join(self.package_folder, "lib", "lib%s.dll" % self.name),
            os.path.join(self.package_folder, "bin", "lib%s.dll" % self.name),
        )

  def package_info(self):
    """Collect built libraries names and solve flatc path."""
    self.cpp_info.libs = tools.collect_libs(self)
    self.user_info.flatc = os.path.join(self.package_folder, "bin", "flatc")