ci.yml

name: CI

on:
  push:
    branches: [master]
  pull_request:
    branches: [master]

jobs:
  test:
    name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        otp: ['20.3', '21.3', '22.3', '23.3.4', '24.3.4']
        elixir: ['1.9.4', '1.10.4', '1.11.4']
        exclude:
          - otp: 23.3.4
            elixir: 1.9.4
          - otp: 24.3.4
            elixir: 1.9.4
          - otp: 20.3
            elixir: 1.10.4
          - otp: 24.3.4
            elixir: 1.10.4
          - otp: 20.3
            elixir: 1.11.4
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Set up OTP/Elxir
        uses: erlef/setup-beam@v1
        with:
          otp-version: ${{matrix.otp}}
          elixir-version: ${{matrix.elixir}}

      - name: Cache deps
        id: cache-deps
        uses: actions/cache@v3
        env:
          cache-name: cache-deps
        with:
          path: deps
          key: deps-${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}
          restore-keys: |
            deps-${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}

      - name: Cache compiled build
        id: cache-build
        uses: actions/cache@v3
        env:
          cache-name: cache-compiled-build
        with:
          path: _build
          key: build-${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-${{ env.cache-name }}-${{ hashFiles('lib/**', 'test/**', '*.exs') }}
          restore-keys: |
            build-${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-${{ env.cache-name }}-${{ hashFiles('lib/**', 'test/**', '*.exs') }}

      - name: Install dependencies
        if: steps.cache-deps.outputs.cache-hit != 'true'
        run: |
          mix deps.get --force
          MIX_ENV=test mix deps.get --force

      - name: Compile dependencies
        if: steps.cache-build.outputs.cache-hit != 'true'
        run: |
          mix deps.compile --force
          MIX_ENV=test mix deps.compile --force

      - name: Compile project
        if: steps.cache-build.outputs.cache-hit != 'true'
        run: |
          mix compile --force --warnings-as-errors
          MIX_ENV=test mix compile --force --warnings-as-errors

      - name: Restore PLT cache
        id: plt_cache
        uses: actions/cache/restore@v3
        with:
          key: |
            ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plt
          restore-keys: |
            ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plt
          path: |
            priv/plts

      - name: Create PLTs
        if: steps.plt_cache.outputs.cache-hit != 'true'
        run: mix dialyzer --plt

      - name: Save PLT cache
        id: plt_cache_save
        uses: actions/cache/save@v3
        if: steps.plt_cache.outputs.cache-hit != 'true'
        with:
          key: |
            ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plt
          path: |
            priv/plts

      - name: Check formatting
        run: mix format --check-formatted --dry-run

      - name: Check docs
        run:  mix doctor --raise

      - name: Check linter
        run: mix credo --strict --all

      - name: Check static analysis
        run: mix dialyzer --no-check --format github

      - name: Check tests
        uses: nick-fields/retry@v2
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          timeout_seconds: 30
          max_attempts: 3
          retry_on: error
          command: |
            mix purge.db
            MIX_ENV=test mix coveralls.github --no-start