Add simple GitHub Actions prototype

Author: gaggle

Dockerfile

@@ -0,0 +1,3 @@
+FROM elixir:alpine
+
+ENTRYPOINT [ "elixir", "action.exs" ]

action.yml

@@ -0,0 +1,19 @@
+name: Elixir Script
+author: Jon Lauridsen
+description: Run simple Elixir scripts
+branding:
+  color: orange
+  icon: code
+inputs:
+  script:
+    description: The script to run
+    required: true
+  debug:
+    description: Whether to tell the GitHub client to log details of its requests. true or false. Default is to run in debug mode when the GitHub Actions step debug logging is turned on.
+    default: ${{ runner.debug == '1' }}
+outputs:
+  result:
+    description: The return value of the script, stringified with `JSON.stringify`
+runs:
+  using: docker
+  image: Dockerfile

lib/CLI.ex

@@ -0,0 +1,6 @@
+defmodule ElixirScript.CLI do
+  def main(args \\ []) do
+    IO.puts "ElixirScript.CLI 👋"
+    IO.inspect args
+  end
+end

mix.exs

@@ -6,15 +6,14 @@ defmodule ElixirScript.MixProject do
       app: :elixir_script,
       version: "0.1.0",
       elixir: "~> 1.15",
-      start_permanent: Mix.env() == :prod,
+      escript: escript(),
       deps: deps()
     ]
   end
 
-  # Run "mix help compile.app" to learn about applications.
-  def application do
+  def escript do
     [
-      extra_applications: [:logger]
+      main_module: ElixirScript.CLI
     ]
   end