Snooper

Easily debug, inspect, and log a function's behavior on a line-by-line basis.

Use like so:

defmodule SnooperReadme do
  import Snooper

  snoop def my_function(a, b) do
    c = a + b * a + b
    d = c * c
    {alpha, beta} = {c * d, c + d}
  end
end

Gives colorized output like:

Installation

The package can be installed by adding snooper to your list of dependencies in mix.exs:

def deps do
  [
    {:snooper, "~> 0.1", only: [:dev, :test]}
  ]
end

You should also update your project's .formatter.exs to import the Snooper formatter configuration:

[
  import_deps: [:snooper]
]

The docs can be found at https://hexdocs.pm/snooper.