Detect available channels

[spyrkob]

Allow prospero to detect channels that the server can subscribe to.

Requirements:

• The user should be able to execute prospero channel search. The result would be a list of "known" channels including the channel GA, their manifest GA(V)/URL, repositories and (optionally) name/description.
  • Displaying name/description would require resolving all channels - if that's a performance issue, this can be an option in this channel search operation or a new operation channel describe --ga
• The source of the channels is a channel itself - a manifest deployed to a maven repository
  • The definition of that channel-of-channels (repository and manifest GA) has to be customizable at build time (it is a new channels.yaml file)
  • Each stream in the channel-of-channels corresponds to a -channel artifact GA
  • The version of the channel is an open pattern - newest version of channel should always be used
  • Each listed channel file should contain only a single channel
    • Otherwise it should be ignored and warning should be printed
• Already subscribed channels are marked as such and/or listed separately

Nice-to-have:

• Make it possible to subscribe to channels using the channel GA
• make the source of channel detection customisable by the user.
  • the definition of channel-of-channels would have to be writable at runtime (e.g. in .installation of Prospero)
  • all the above logic would have to work with a list of channels
  • optional: new operations to manage the list of channels-of-channels (otherwise - use vi)
• detect channels that constitute different versions of subscribed channels (e.g. wildfly-27/wildfly-28)

[parsharma]

Is anyone currently working on this issue?