Auto-detect config file

[mperham]

If I run bin/puma, I'd like it to auto-detect and use config/puma.rb to configure and boot Rails. I'm trying to reduce development friction as much as possible, making the command as easy as possible to start. Running bin/rails makes WEBrick easy but we want to test locally with puma where possible. This will make puma one character simpler than WEBrick, thus winning the battle of the development servers. QED

[mperham]

Looks like puma changes the default development logging when started this way:

$ bin/puma -C config/puma.rb 
[20512] Puma starting in cluster mode...
[20512] * Version 2.7.1, codename: Earl of Sandwich Partition
[20512] * Min threads: 2, max threads: 4
[20512] * Environment: development
[20512] * Process workers: 2
[20512] * Phased restart available
[20512] * Listening on tcp://0.0.0.0:3000
[20512] Use Ctrl-C to stop
[20512] - Worker 20514 booted, phase: 0
[20512] - Worker 20513 booted, phase: 0
[20513] 127.0.0.1 - - [17/Jan/2014 09:23:06] "GET / HTTP/1.1" 200 - 3.5813
[20513] 127.0.0.1 - - [17/Jan/2014 09:23:06] "GET /application.css?body=1 HTTP/1.1" 304 - 0.0787
[20513] 127.0.0.1 - - [17/Jan/2014 09:23:06] "GET /application3.css?body=1 HTTP/1.1" 304 - 0.0600
[20513] 127.0.0.1 - - [17/Jan/2014 09:23:06] "GET /jquery.tools.min.all-1.2.6.js?body=1 HTTP/1.1" 304 - 0.0534
[20513] 127.0.0.1 - - [17/Jan/2014 09:23:06] "GET /jquery_ujs.js?body=1 HTTP/1.1" 304 - 0.0742

but not when we start it via bin/rails s puma. How do we use a config file while also getting normal Rails development stdout logging?

[mperham]

Any thoughts about setting puma as the default server, a la unicorn-rails? We love it.

https://github.com/samuelkadolph/unicorn-rails/blob/master/lib/unicorn/rails.rb#L35

[catsby]

Would that require a separate gem, puma-rails or similar? Or something into Rails, like how Rails will pick up Thin automatically? I would love to see the latter.

[mperham]

I'd prefer not to require a separate gem. I don't know why an app would have multiple app servers bundled but maybe there's a rare edge case.

[evanphx]

@mperham With regards to setting Puma as the default, Rack will find puma automatically already (rack/rack@e6284a3). Do you think more is needed?

[mperham]

Sounds good, we're probably on an old rack version.