RPM Support

As a user, I can sync RPM/SRPM/Erratum from a remote Yum/DNF repository.

Other unknown types of a content should be ignored during sync.

This story is complete when:

• I can initiate a sync from remote Yum/DNF repo
• The sync completes without error
• I can see that the expected content was added to the repo

Pseudo Code First Stage Example¶

The sync will create a Stages API first stage and then pass all of them to DeclarativeVersion. Here is some pseudocode that can run inside of the __call__() of the first stage.

with ProgressBar(message='Downloading Metadata') as pb:
            repomd_url = url = self.remote.url + '/repodata/repomd.xml'
            downloader = self.remote.get_downloader(repomd_url)  # get the downloader
            result = await downloader.run()  # downloading happens here
            pb.increment()  # tell the user we downloading something

            other_metadata_files = get_other_metadata_files_as_list(result)  # gives urls of comps, updateinfo, etc.
            downloaders = []
            for url in other_metadata_files:
                       downloader = self.remote.get_downloader(repomd_url)  # get the downloader
                       downloaders.append(downloader.run())  # This only creates the coroutine, it doesn't run it

            while downloaders:
                       done, downloaders = await asyncio.wait(pending, return_when=asyncio.FIRST_COMPLETED)
                       for finished_downloader in done:
                                     pb.increment()  # tell the user we downloading something
                                     in_memory_parsed_metadata = createrepo_c.load_xml(finished_downloader.path)
                                     for package in in_memory_parsed_metadata:
                                                 if is_updaterecord(package):
                                                              content = UpdateRecord(content_data_from_package)
                                                              artifact = Artifact(digest_data_from_package)
                                                              da = DeclarativeArtifact(artifact, url, entry.relative_path, self.remote)
                                                              dc = DeclarativeContent(content=file, d_artifacts=[da])
                                                              await out_q.put(dc)
                                                 if is_packagerecord(package):
                                                              #  Similar to what we did  only using RpmContent / SrpmContent

The call function will become long, so consider breaking it up into additional coroutine methods on the object. For example if we made a build_da_dc_and_emit() coroutine it would be defined like:

async def build_da_dc_and_emit(self, content, artifact):
               da = DeclarativeArtifact(artifact, url, entry.relative_path, self.remote)
               dc = DeclarativeContent(content=file, d_artifacts=[da])
               await out_q.put(dc)

# Then in your code call it with:
await self.build_da_dc_and_emit(content, artifact)