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
• optionally, installing hex

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

Usage

See action.yml for the action's specification.

Note: The Erlang/OTP release version specification is relatively complex. For best results, we recommend specifying exact Erlang/OTP, Elixir versions, and rebar3 versions, and setting option version-type to strict. However, values like 22.x, or even >22, are also accepted, and we attempt to resolve them according to semantic versioning rules. This implicitly means version-type is loose, which is also the default value for this option.

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 versions, such as v1.11.0-rc.0, use the full version specifier (v1.11.0-rc.0) and set option version-type to strict. Pre-release versions are opt-in, so 1.11.x will not match a pre-release.

Compatibility between Operating System and Erlang/OTP

This list presents the known working version combos between the target operating system and Erlang/OTP.

Operating system	Erlang/OTP	Status
ubuntu-16.04	17 - 24	✅
ubuntu-18.04	17 - 24	✅
ubuntu-20.04	20 - 24	✅
windows-2016	21* - 24	✅
windows-2019	21* - 24	✅

Note *: prior to 23, Windows builds are only available for minor versions, e.g. 21.0, 21.3, 22.0, etc.

Self-hosted runners

Self-hosted runners need to set env. variable ImageOS to one of the following, since the action uses that to download assets:

ImageOS	Operating system
ubuntu16	ubuntu-16.04
ubuntu18	ubuntu-18.04
ubuntu20	ubuntu-20.04
win16	windows-2016
win19	windows-2019

as per the following example:

...

jobs:
  test:
    runs-on: self-hosted
    env:
      ImageOS: ubuntu20 # equivalent to runs-on ubuntu-20.04
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        ...

Basic example (Erlang/OTP + Elixir, on Ubuntu)

# create this in .github/workflows/ci.yml
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 (Erlang/OTP + rebar3, on Ubuntu)

# create this in .github/workflows/ci.yml
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 (Erlang/OTP + Elixir, on Ubuntu)

# create this in .github/workflows/ci.yml
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 (Erlang/OTP + rebar3, on Ubuntu)

# create this in .github/workflows/ci.yml
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

Basic example (Erlang/OTP + rebar3, on Windows)

# create this in .github/workflows/ci.yml
on: push

jobs:
  test:
    runs-on: windows-2019
    steps:
      - uses: actions/checkout@v2
      - uses: erlef/setup-beam@v1
        with:
          otp-version: '24'
          rebar3-version: '3.16.1'
      - run: rebar3 ct

Elixir Problem Matchers

The Elixir Problem Matchers in this repository are adapted from here. See MATCHER_NOTICE for license details.

Action versioning

setup-beam has three version paths, described below, for example version 1.8.0:

• @v1: the latest in the 1.y.z series (this tag is movable),
• @v1.8: the latest in the 1.8.z series (this tag is movable),
• @v1.8.0: release 1.8.0 (this tag is not movable).

To prevent issues in CI (unless you're OK with potential incompatibility between versions - we make real a effort to not introduce those without bumping major) we suggest you to use @vx.y.z, whenever possible.

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.