def _build()

in build/fbcode_builder/getdeps/py_wheel_builder.py [0:0]
38 lines of code
6 McCabe index (conditional complexity)

    def _build(self, install_dirs: List[str], reconfigure: bool) -> None:
        # When we are invoked, self.src_dir contains the unpacked wheel contents.
        #
        # Since a wheel file is just a zip file, the Fetcher code recognizes it as such
        # and goes ahead and unpacks it.  (We could disable that Fetcher behavior in the
        # future if we ever wanted to, say if we wanted to call pip here.)
        wheel_name = self._parse_wheel_name()
        name_version_prefix = "-".join((wheel_name.distribution, wheel_name.version))
        dist_info_name = name_version_prefix + ".dist-info"
        data_dir_name = name_version_prefix + ".data"
        self.dist_info_dir = os.path.join(self.src_dir, dist_info_name)
        wheel_metadata = self._read_wheel_metadata(wheel_name)

        # Check that we can understand the wheel version.
        # We don't really care about wheel_metadata["Root-Is-Purelib"] since
        # we are generating our own standalone python archives rather than installing
        # into site-packages.
        version = wheel_metadata["Wheel-Version"]
        if not version.startswith("1."):
            raise Exception("unsupported wheel version %s" % (version,))

        # Add a find_dependency() call for each of our dependencies.
        # The dependencies are also listed in the wheel METADATA file, but it is simpler
        # to pull this directly from the getdeps manifest.
        dep_list = sorted(
            self.manifest.get_section_as_dict("dependencies", self.ctx).keys()
        )
        find_dependency_lines = ["find_dependency({})".format(dep) for dep in dep_list]

        getdeps_cmake_dir = os.path.join(
            os.path.dirname(os.path.dirname(__file__)), "CMake"
        )
        self.template_format_dict = {
            # Note that CMake files always uses forward slash separators in path names,
            # even on Windows.  Therefore replace path separators here.
            "cmake_dir": _to_cmake_path(getdeps_cmake_dir),
            "lib_name": self.manifest.name,
            "manifest_name": self.manifest.name,
            "namespace": self.manifest.name,
            "upper_name": self.manifest.name.upper().replace("-", "_"),
            "find_dependency_lines": "\n".join(find_dependency_lines),
        }

        # Find sources from the root directory
        path_mapping = {}
        for entry in os.listdir(self.src_dir):
            if entry in (dist_info_name, data_dir_name):
                continue
            self._add_sources(path_mapping, os.path.join(self.src_dir, entry), entry)

        # Files under the .data directory also need to be installed in the correct
        # locations
        if os.path.exists(data_dir_name):
            # TODO: process the subdirectories of data_dir_name
            # This isn't implemented yet since for now we have only needed dependencies
            # on some simple pure Python wheels, so I haven't tested against wheels with
            # additional files in the .data directory.
            raise Exception(
                "handling of the subdirectories inside %s is not implemented yet"
                % data_dir_name
            )

        # Emit CMake files
        self._write_cmakelists(path_mapping, dep_list)
        self._write_cmake_config_template()

        # Run the build
        self._run_cmake_build(install_dirs, reconfigure)