setup-beam

This action sets up an Erlang/OTP environment for use in a GitHub Actions workflow by:

• installing Erlang/OTP
• optionally, installing Elixir
• optionally, installing rebar3

Note Currently, this action only supports Actions' ubuntu- runtimes.

Usage

See action.yml.

Note The Erlang/OTP release version specification is relatively complex. For best results, we recommend specifying exact Erlang/OTP, Elixir versions, and rebar3 versions. However, values like 22.x are also accepted, and we attempt to resolve them according to semantic versioning rules.

Additionally, it is recommended that one specifies Erlang/OTP, Elixir and rebar3 versions using YAML strings, as these examples do, so that numbers like 23.0 don't end up being parsed as 23, which is not equivalent.

For pre-release Elixir versions, such as 1.11.0-rc.0, use the full version specifier (1.11.0-rc.0). Pre-release versions are opt-in, so 1.11.x will not match a pre-release.

Basic example (Elixir)

on: push

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        with:
          otp-version: '22.2'
          elixir-version: '1.9.4'
      - run: mix deps.get
      - run: mix test

Basic example (rebar3)

on: push

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        with:
          otp-version: '22.2'
          rebar3-version: '3.14.2'
      - run: rebar3 ct

Matrix example (Elixir)

on: push

jobs:
  test:
    runs-on: ubuntu-latest
    name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
    strategy:
      matrix:
        otp: ['20.3', '21.3', '22.2']
        elixir: ['1.8.2', '1.9.4']
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        with:
          otp-version: ${{matrix.otp}}
          elixir-version: ${{matrix.elixir}}
      - run: mix deps.get
      - run: mix test

Matrix example (rebar3)

on: push

jobs:
  test:
    runs-on: ubuntu-latest
    name: Erlang/OTP ${{matrix.otp}} / rebar3 ${{matrix.rebar3}}
    strategy:
      matrix:
        otp: ['20.3', '21.3', '22.2']
        rebar3: ['3.14.1', '3.14.3']
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        with:
          otp-version: ${{matrix.otp}}
          rebar3-version: ${{matrix.rebar3}}
      - run: rebar3 ct

Phoenix example

on: push

jobs:
  test:
    runs-on: ubuntu-latest

    services:
      db:
        image: postgres:11
        ports: ['5432:5432']
        env:
          POSTGRES_PASSWORD: postgres
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5

    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        with:
          otp-version: '22.2'
          elixir-version: '1.9.4'
      - run: mix deps.get
      - run: mix test

Authenticating with Postgres in Phoenix

When using the Phoenix example above, the postgres container has some default authentication set up. Specifically, it expects a username of "postgres", and a password of "postgres". It will be available at localhost:5432.

The simplest way of setting these auth values in CI is by checking for the GITHUB_ACTIONS environment variable that is set in all workflows:

# config/test.exs

use Mix.Config

# Configure the database for local testing
config :app, App.Repo,
  database: "my_app_test",
  hostname: "localhost",
  pool: Ecto.Adapters.SQL.Sandbox

# Configure the database for GitHub Actions
if System.get_env("GITHUB_ACTIONS") do
  config :app, App.Repo,
    username: "postgres",
    password: "postgres"
end

Matchers

The problem matchers in this repository are adapted from here. See MATCHER_NOTICE for license details.

License

The scripts and documentation in this project are released under the MIT license.

Contributing

Check out this doc.

Current Status

This action is in active development.