def fetch()

in src/buildstream_plugins/sources/cargo.py [0:0]

• 10 lines of code
• 6 McCabe index (conditional complexity)

    def fetch(self, alias_override=None, **kwargs):

        # Just a defensive check, it is impossible for the
        # file to be already cached because Source.fetch() will
        # not be called if the source is already cached.
        #
        if os.path.isfile(self._get_mirror_file()):
            return  # pragma: nocover

        # Download the crate
        crate_url, auth_scheme = self._get_url(alias_override)
        with self.cargo.timed_activity("Downloading: {}".format(crate_url), silent_nested=True):
            sha256 = self._download(crate_url, auth_scheme)
            if self.sha is not None and sha256 != self.sha:
                raise SourceError(
                    "File downloaded from {} has sha256sum '{}', not '{}'!".format(crate_url, sha256, self.sha)
                )