Simplify overall usage

[ehmatthes]

Now that external plugins are working, some usage patterns have been clarified. There's no need for the --platform arg, as that can be inferred from the plugin that's installed. If there's any ambiguity, an optional --plugin arg is better than --platform from this point forward. The --plugin arg is also useful for testing. This picks up from #372, and #379 as well.

Tasks

• [ ] Update usage
• [ ] Update tests
• [ ] Update docs
• [ ] Merge
• [ ] Release, as 0.9.0, because simpler interface.
• [ ] Announce. Highlight simpler usage, and tagline. :)

[ehmatthes]

Tasks, from #372

• [ ] Add an arg called platform_name to each plugin, for messaging. Also, temporarily, to set sd_config.platform. This takes the place of sd_config.platform in messages.
  • [ ] fly
  • [ ] platformsh
  • [ ] heroku
• [ ] Add a meta attribute on each plugin, to be clear that it's a dsd plugin.
  • [ ] How does Simon discover plugins?
• [ ] Remove --platform arg. I don't think it's going to make sense to keep this with a focus on plugins.
• [ ] Use references to plugin in place of sd_config.platform.
• [ ] Remove parsing code that derives plugin name from platform name.
• [ ] Change the command from manage.py simple_deploy to manage.py deploy. This is more general, and it's a verb. The command simple_deploy read better with the required argument --platform following it. Without that arg, manage.py simple_deploy looks and reads oddly.
• [ ] Add an optional --plugin arg. This will be useful right away for testing, and simplifies logic around picking the plugin from the platform name.
• [ ] Test
  • [ ] Local
  • [ ] e2e from local
  • [ ] e2e from pypi
  • [ ] Address plugin test discovery issues, #376; I believe this affects pypi tests as well.
• [ ] Update docs, especially quick start docs.
• [ ] Merge
• [ ] Release
• [ ] Announce

[ehmatthes]

Working notes

• [ ] Consider this usage; see #372 for detailed notes about rationale.

  $ python manage.py deploy --configuration-only
  $ python manage.py deploy --automate-all

[ehmatthes]

Add platform_name attribute to dsd-flyio

• [ ] Use initially for messaging, and to set platform.
• [ ] Set as fly_io for now.
• [ ] Update to Fly.io.