conanfile.py

from conans import ConanFile, AutoToolsBuildEnvironment, tools
from conans.errors import ConanInvalidConfiguration
from contextlib import contextmanager
import os

required_conan_version = ">=1.33.0"


class CityhashConan(ConanFile):
    name = "cityhash"
    description = "CityHash, a family of hash functions for strings."
    license = "MIT"
    topics = ("conan", "cityhash", "hash")
    homepage = "https://github.com/google/cityhash"
    url = "https://github.com/conan-io/conan-center-index"

    settings = "os", "arch", "compiler", "build_type"
    options = {
        "shared": [True, False],
        "fPIC": [True, False],
    }
    default_options = {
        "shared": False,
        "fPIC": True,
    }

    _autotools = None

    @property
    def _source_subfolder(self):
        return "source_subfolder"

    def config_options(self):
        if self.settings.os == "Windows":
            del self.options.fPIC

    def configure(self):
        if self.options.shared:
            del self.options.fPIC

    def validate(self):
        if self.settings.compiler == "Visual Studio" and self.options.shared:
            raise ConanInvalidConfiguration("cityhash does not support shared builds with Visual Studio")

    def build_requirements(self):
        self.build_requires("libtool/2.4.6")
        if tools.os_info.is_windows and not tools.get_env("CONAN_BASH_PATH"):
            self.build_requires("msys2/cci.latest")

    def source(self):
        tools.get(**self.conan_data["sources"][self.version],
                  destination=self._source_subfolder, strip_root=True)

    @contextmanager
    def _build_context(self):
        if self.settings.compiler == "Visual Studio":
            with tools.vcvars(self.settings):
                env = {
                    "CC": "cl -nologo",
                    "CXX": "cl -nologo",
                    "LD": "link -nologo",
                    "AR": "{} lib".format(tools.unix_path(self.deps_user_info["automake"].ar_lib)),
                }
                with tools.environment_append(env):
                    yield
        else:
            yield

    def _configure_autotools(self):
        if self._autotools:
            return self._autotools
        self._autotools = AutoToolsBuildEnvironment(self, win_bash=tools.os_info.is_windows)
        self._autotools.libs = []
        yes_no = lambda v: "yes" if v else "no"
        args = [
            "--enable-static={}".format(yes_no(not self.options.shared)),
            "--enable-shared={}".format(yes_no(self.options.shared)),
        ]
        if self.settings.compiler == "Visual Studio":
            self._autotools.cxx_flags.append("-EHsc")
            self._autotools.flags.append("-FS")
        self._autotools.configure(configure_dir=self._source_subfolder, args=args)
        return self._autotools

    def build(self):
        with tools.chdir(self._source_subfolder):
            self.run("{} -fiv".format(tools.get_env("AUTORECONF")), win_bash=tools.os_info.is_windows)
        with self._build_context():
            autotools = self._configure_autotools()
            autotools.make()

    def package(self):
        self.copy("COPYING", dst="licenses", src=self._source_subfolder)
        with self._build_context():
            autotools = self._configure_autotools()
            autotools.install()
        tools.remove_files_by_mask(os.path.join(self.package_folder, "lib"), "*.la")
        tools.rmdir(os.path.join(self.package_folder, "share"))

    def package_info(self):
        self.cpp_info.libs = ["cityhash"]