Description of problem:

If you take a system that was using yum, and fedup it to F22, dnf immmediately suggests you run dnf-2 migrate.

This command calls "yum-deprecated -q group list installed -C".

This command cannot work, because you've just done a fresh upgrade and there's no yum F22 metadata cached.

Version-Release number of selected component (if applicable):

python-dnf-plugins-extras-migrate-0.0.8-1.fc22.noarch

How reproducible:

100%

Steps to Reproduce:
1. fedup --network f22
2. Run 'yum <anything>'
3. Try and run the suggested command

Actual results:

Cannot find repomd.xml file for fedora/22/x86_64
Traceback (most recent call last):
  File "/usr/bin/dnf-2", line 36, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 185, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 84, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 134, in _main
    cli.run()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 1077, in run
    return self.command.run(self.base.extcmds)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/migrate.py", line 126, in run
    self.migrate_groups()
  File "/usr/lib/python2.7/site-packages/dnf-plugins/migrate.py", line 242, in migrate_groups
    installed = self.get_yum_installed_groups(yum_exec)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/migrate.py", line 257, in get_yum_installed_groups
    env=env_config))
  File "/usr/lib64/python2.7/subprocess.py", line 573, in check_output
    raise CalledProcessError(retcode, cmd, output=output)
subprocess.CalledProcessError: Command '[u'/usr/bin/yum-deprecated', u'-q', u'group', u'list', u'installed', u'-C']' returned non-zero exit status 1

Expected results:

Succeeds.

Additional info:

Also, it runs yum-deprecated in a way that it re-prints out the deprecation warning, even though's run internally by dnf.