Rockwell Schrock

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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, []})