Qqwy
Is it possible to auto-restart a Phoenix server on config change (in development)?
For most changes made in your app’s files, Phoenix is able to reload individual modules while the app is kept running (using a combination of Phoenix.CodeReloader and Phoenix.LiveReloader).
However, if your config-files or mix.exs change, then this requires a manual restart.
This is of course completely reasonable: we might change what dependencies exist, what options are passed to the Elixir/Erlang compiler(s), etc.
However, it is very common to trigger this situation when e.g. switching between branches in git.
Thus my question: Is there a way to automate this full restart of the application?
Maybe by wrapping the call to mix run --no-halt or iex -S mix in some other command or shell-script?
Thank you for your help!
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axelson
In the past I experimented with using :init.restart/0 by adding it to the Phoenix exception page that is displayed for those exceptions. It seemed to work pretty well but I never got around to making a PR for it.
stefanchrobot
To me it sounds like this is out of Phoenix’s scope of responsibilities. I think wrapping the command with a file watcher is the way to go. I personally use watchexec to format the code and run my tests (this could be tweaked, but I hope you get the idea):
watchexec -e 'ex,exs,eex,leex,lock' -- 'mix format & mix test --stale'
Seems this could do the job you need.
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