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Mix compiler tracer for detecting unused public functions.

defdepsdo[{:mix_unused,"~> 0.3.0"}]end

The docs can be found athttps://hexdocs.pm/mix_unused.

After installation you need to add:unused as a compiler to the list of Mixcompilers:

defmoduleMySystem.MixProjectdouseMix.Projectdefprojectdo[compilers:[:unused]++Mix.compilers(),# In case of Phoenix projects you need to add it to the list# compilers: [:unused, :phoenix, :gettext] ++ Mix.compilers()# ...## If you want to only run it in the dev environment you could do# it by using `compilers: compilers(Mix.env()) ++ Mix.compilers()`# instead and then returning the right compilers per environment.]end# ...end

Then you just need to runmix compile ormix compile --force as usualand unused hints will be added to the end of the output.

This isn't perfect solution and this will not find dynamic calls in form of:

apply(mod,func,args)

So this mean that, for example, if you have customchild_spec/1 definitionthenmix unused can return such function as unused even when you are usingthat indirectly in your supervisor.

You can define used functions by addingmfa inunused: [ignored: [⋯]]in your project configuration:

defprojectdo[# ⋯unused:[ignore:[{MyApp.Foo,:child_spec,1}]],# ⋯]end

Copyright © 2021 by Łukasz Niemier

This work is free. You can redistribute it and/or modify it under theterms of the MIT License. See theLICENSE file for more details.