Modularity support

There is support for Fedora and RHEL Modularity. This requires dnf, not merely yum. It is available for RHEL >= 8 and its clones, and built into all supported releases of Fedora.

The new modularity format was added with release 2.4 and uses module_setup_commands. Each command can be specified multiple times, and mock respects the order of the commands when executing them.

• Artificial example:
  • Disable any potentially enabled postgresql module stream.
  • Enable specific postgresql and ruby module streams.
  • Install the development nodejs profile and (4) disable it immediately.

config_opts['module_setup_commands'] = [
    ('disable', 'postgresql'),
    ('enable',  'postgresql:12, ruby:2.6'),
    ('install', 'nodejs:13/development'),
    ('disable', 'nodejs'),
    ]

The obsolete, less flexible, but still available modularity syntax was added in Mock 1.4.2.

config_opts['module_enable'] = ['list', 'of', 'modules']
config_opts['module_install'] = ['module1/profile', 'module2/profile']

This would call these steps during the init phase.

• dnf module enable list of modules
• dnf module install module1/profile module2/profile

You can find more about this obsolete format in this comprehensive blogpost.

• Modularity Features in Mock.