ci.yml

name: CI

on: [push, pull_request]

jobs:
  ci:
    # Avoid duplicate jobs on PR from a branch on the same repo
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name
    runs-on: ubuntu-latest
    env:
      MIX_ENV: test
    steps:
      - uses: erlef/setup-beam@v1
        with:
          otp-version: '25'
          elixir-version: '1.14'

      # Check out the code.
      - name: Checkout
        uses: actions/checkout@v3

      # Define how to cache deps. Restores existing cache if present.
      - name: Cache deps
        id: cache-deps
        uses: actions/cache@v3
        env:
          cache-name: cache-elixir-deps
        with:
          path: deps
          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}
          restore-keys: |
            ${{ runner.os }}-mix-${{ env.cache-name }}-
      # Define how to cache the `_build` directory.
      # After the first run, this speeds up tests runs a lot.
      # This includes not re-compiling our project's downloaded deps every run.
      - name: Cache compiled build
        id: cache-build
        uses: actions/cache@v3
        env:
          cache-name: cache-compiled-build
        with:
          path: _build
          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}
          restore-keys: |
            ${{ runner.os }}-mix-${{ env.cache-name }}-
            ${{ runner.os }}-mix-

      # Conditionally bust the cache when job is re-run.
      # Sometimes, we may have issues with incremental builds that are fixed by doing a full recompile.
      # In order to not waste dev time on such trivial issues force a full recompile only on builds that are retried.
      # See https://fly.io/docs/elixir/advanced-guides/github-actions-elixir-ci-cd/ for more infos
      - name: Clean to rule out incremental build as a source of flakiness
        if: github.run_attempt != '1'
        run: |
          mix deps.clean --all
          mix clean
      - name: Deps get
        run: mix deps.get
      - name: Dependencies Check
        run: mix deps.unlock --check-unused
      - name: Compiles without warnings
        run: mix compile --warnings-as-errors
      - name: Check Formatting
        run: mix format --check-formatted
      - name: Credo
        run: mix credo -a --strict
      - name: Test
        run: mix test
      - name: Dialyzer
        run: mix dialyzer

  alls-green:
    if: always() && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name)
    runs-on: ubuntu-latest
    needs:
      - ci
    steps:
      - run: ${{ !contains(needs.*.result, 'failure') }}