FixWarnings

Automatically fixes compiler warnings in your Elixir project.

Does that look familiar?

Compiling 5 files (.ex)
warning: variable "params" is unused
  lib/controller.ex:24

... 500 lines more...

warning: variable "curr_line" is unused
  lib/foo.ex:31

FixWarnings automatically fixes the trivial warnings directly in your Elixir source code. It removes unused aliases and adds a _ prefix to unused variables with.

Alpha Warning

I extracted this from a quickly hacked together script, which worked well for me. But don't trust this blindly yet, verify with git diff first.

Guide

Add fix_warnings to your mix.exs.

def deps do
  [
    {:fix_warnings, "~> 0.1.0", only: :dev}
  ]
end

Install dependency

mix deps.get

Run fix_warnings:

mix fix_warnings

Or run with explicitly captured logs:

mix compile --force &> path/to/output.log

mix fix_warnings -f path/to/output.log
# or mix fix_warnings --file=path/to/output.log

Enjoy

git diff

TODOs (PRs welcome)

• There might be a few edge-cases
• Add more warnings
• Refactor mix task
• Does not seem to capture warnings in .exs files
• Add support for preview flag
  • this should be the default, so maybe add support for force flag?
• Add diffing output