Elixir on Alpine Linux

This Dockerfile provides a full installation of Elixir on Alpine, intended for running on CI with minimum dependency and it has no build tools installed. This Dockerfile is almost identical with bitwalker/alpine-elixir with additional Dialyzer. The caveat of course is if one has NIFs which require a native compilation toolchain, but that is left as an exercise for the reader.

Dialyzer PLT

This image provide PLT that built against current Erlang/OTP and Elixir version. The Erlang apps that were included are erts, kernel, stdlib, and crypto. The Erlang output file is dialyxir_erlang-20.0.1.plt and the Elixir output file is dialyxir_erlang-20.0.1_elixir-1.5.1.plt. PLT files are stored in DIALYZER_PLT_PATH directory. This is useful when you're working with Dialyxir. Add dialyzer: [plt_core_path: System.get_env("DIALYZER_PLT_PATH")] to your mix.exs:

def project do
  [
    app: :my_app,
    version: "0.0.1",
    elixir: "~> 1.5",
    build_embedded: Mix.env == :prod,
    start_permanent: Mix.env == :prod,
    deps: deps(),
    dialyzer: [plt_core_path: System.get_env("DIALYZER_PLT_PATH")],
  ]
end

Usage

To boot straight to a prompt in the image:

$ docker run --rm -it muhifauzan/alpine-elixir iex
Erlang/OTP 20 [erts-9.0.1] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads
:10] [hipe] [kernel-poll:false]

Interactive Elixir (1.5.1) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)>
User switch command
 --> q