136 lines
3.1 KiB
Markdown
136 lines
3.1 KiB
Markdown
# setup-elixir
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[](https://github.com/actions/setup-elixir/actions)
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[](https://github.com/actions/setup-elixir/actions)
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This action sets up an Elixir environment for use in a GitHub Actions
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workflow by:
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- Installing OTP
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- Installing Elixir
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**Note** Currently, this action currently only supports Actions' `ubuntu-` runtimes.
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## Usage
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See [action.yml](action.yml).
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**Note** The OTP release version specification is [relatively
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complex](http://erlang.org/doc/system_principles/versions.html#version-scheme).
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For best results, we recommend specifying exact OTP and Elixir versions.
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However, values like `22.x` are also accepted, and we attempt to resolve them
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according to semantic versioning rules.
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### Basic example
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```yaml
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on: push
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jobs:
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test:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-elixir@v1
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with:
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otp-version: 22.2
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elixir-version: 1.9.4
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- run: mix deps.get
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- run: mix test
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```
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### Matrix example
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```yaml
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on: push
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jobs:
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test:
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runs-on: ubuntu-latest
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name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
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strategy:
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matrix:
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otp: [20.3, 21.3, 22.2]
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elixir: [1.8.2, 1.9.4]
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-elixir@v1
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with:
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otp-version: ${{matrix.otp}}
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elixir-version: ${{matrix.elixir}}
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- run: mix deps.get
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- run: mix test
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```
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### Phoenix example
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```yaml
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on: push
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jobs:
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test:
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runs-on: ubuntu-latest
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services:
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db:
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image: postgres:11
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ports: ['5432:5432']
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env:
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POSTGRES_PASSWORD: postgres
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options: >-
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--health-cmd pg_isready
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--health-interval 10s
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--health-timeout 5s
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--health-retries 5
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-elixir@v1
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with:
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otp-version: 22.2
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elixir-version: 1.9.4
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- run: mix deps.get
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- run: mix test
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```
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#### Authenticating with Postgres in Phoenix
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When using the Phoenix example above, the `postgres` container has some
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default authentication set up. Specifically, it expects a username of
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"postgres", and a password of "postgres". It will be available at
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`localhost:5432`.
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The simplest way of setting these auth values in CI is by checking for the
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`GITHUB_ACTIONS` environment variable that is set in all workflows:
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```elixir
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# config/test.exs
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use Mix.Config
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# Configure the database for local testing
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config :app, App.Repo,
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database: "my_app_test",
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hostname: "localhost",
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pool: Ecto.Adapters.SQL.Sandbox
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# Configure the database for GitHub Actions
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if System.get_env("GITHUB_ACTIONS") do
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config :app, App.Repo,
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username: "postgres",
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password: "postgres"
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end
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```
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## License
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The scripts and documentation in this project are released under the [MIT license](LICENSE.md).
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## Contributing
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Check out [this doc](CONTRIBUTING.md).
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## Current Status
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This action is in active development.
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