Drush 9 alias files not discoverable

[mrweiner]

#3107 (comment) states that ~/.drush/sites is a discoverable directory
Running drush site:alias-convert and specifying that directory results in the files being generated, but even after running drush cc drush, drush sa returns { } and no aliases are listed with drush status.

https://github.com/drush-ops/drush/blob/master/examples/example.site.yml states that discoverable directories are $ROOT/drush/sites and $ROOT/../drush/sites

• In my composer managed project -- where $ROOT contains /sites/, /core, etc -- $ROOT/drush seems to be a file. As such, $ROOT/drush/sites is not an option.
• When I copy the files generated above by drush site:alias-convert to $ROOT/../drush/sites and run drush cc drush, drush sa returns { } and no aliases are listed with drush status.

Given the above, how exactly can I make my alias files discoverable by Drush? I seem to be out of options.

[greg-1-anderson]

In the short term, remove the file $ROOT/drush and create a directory in that path.

If any of the paths mentioned above are not working, I am +1 on fixing those bugs.

[greg-1-anderson]

c.f. https://github.com/consolidation/site-alias

Reproduce any bugs with the current dev-master of Drush, which uses the above project. Port was one-to-one, so all existing bugs were probably ported faithfully.

[greg-1-anderson]

Oh, I forgot! Drush 9 disables all global locations for aliases by default. This was changed after the issue you quoted above. If you'd like to use ~/.drush/sites as a location for site aliases, add the following to your ~/.drush/drush.yml file:

drush:
  paths:
    alias-path:
      - '${env.home}/.drush/sites'