How to detect if the application is running under the development server?

[fluca1978]

Is there a way to understand if the application is running under the development server (e.g., scripts/myapp daemon or morbo)?
I would like to configure differently the application depending on the runtime environment.

[Grinnz]

Often the best solution for this is to test $app->mode, which is set by default to 'development', or 'production' when running hypnotoad, but can be set as works best for your situation (just note that the default error pages in 'development' mode are quite verbose so ensure that you always deploy in 'production' mode to users).

[guest20]

mojo will load config files based on the mode, so it makes sense to put your features behind a config flag and then turn them on in $appname.development.conf.

This also lets you turn on a features you planned to be dev-only in non-dev when they turn out to be handy for tracking down issues in prod.

[jberger]

I think you can use the before_server_start hook

$ perl -Mojo -E 'app->hook(before_server_start => sub ($server, $app) { say ref $server }); app->start' prefork
Mojo::Server::Prefork
Web application available at http://127.0.0.1:3000

[jberger]

Although it doesn't look like that mechanism can distinguish between daemon and morbo, so perhaps not