list.py 文件源码

def find_packages_latests_versions(self, options):
        index_urls = [options.index_url] + options.extra_index_urls
        if options.no_index:
            logger.notify('Ignoring indexes: %s' % ','.join(index_urls))
            index_urls = []

        if options.use_mirrors:
            logger.deprecated("1.7",
                        "--use-mirrors has been deprecated and will be removed"
                        " in the future. Explicit uses of --index-url and/or "
                        "--extra-index-url is suggested.")

        if options.mirrors:
            logger.deprecated("1.7",
                        "--mirrors has been deprecated and will be removed in "
                        " the future. Explicit uses of --index-url and/or "
                        "--extra-index-url is suggested.")
            index_urls += options.mirrors

        dependency_links = []
        for dist in get_installed_distributions(local_only=options.local, skip=self.skip):
            if dist.has_metadata('dependency_links.txt'):
                dependency_links.extend(
                    dist.get_metadata_lines('dependency_links.txt'),
                )

        session = self._build_session(options)

        finder = self._build_package_finder(options, index_urls, session)
        finder.add_dependency_links(dependency_links)

        installed_packages = get_installed_distributions(local_only=options.local, include_editables=False, skip=self.skip)
        for dist in installed_packages:
            req = InstallRequirement.from_line(dist.key, None)
            try:
                link = finder.find_requirement(req, True)

                # If link is None, means installed version is most up-to-date
                if link is None:
                    continue
            except DistributionNotFound:
                continue
            except BestVersionAlreadyInstalled:
                remote_version = req.installed_version
            else:
                # It might be a good idea that link or finder had a public method
                # that returned version
                remote_version = finder._link_package_versions(link, req.name)[0]
                remote_version_raw = remote_version[2]
                remote_version_parsed = remote_version[0]
            yield dist, remote_version_raw, remote_version_parsed