Making dbg/2 useful in IEx

April 17, 2023

The default behavior of `dbg/2` when running an application via IEx (e.g. `iex -S mix phx.server`) is to halt execution and request to `pry` into the executing context.

However, in most cases I just want dbg/2 to behave a like a fancier `IO.inspect/2`.

This can be accomplished by adding this configuration to `~/.iex.exs`:

# Change behavior of dbg/2 to stop prying when in IEx
Application.put_env(:elixir, :dbg_callback, {Macro, :dbg, []})

Links

[1] dbg/2 (https://hexdocs.pm)
[2] pry/0 (https://hexdocs.pm)
[3] IO.inspect/2 (https://hexdocs.pm)

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