elixir.yml

name: Elixir CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build:
    name: Build and cache dependencies
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Set up Elixir
        uses: erlef/setup-beam@v1
        with:
          elixir-version: "1.17.1"
          otp-version: "27.0"
      - name: Restore dependencies cache
        uses: actions/cache@v3
        with:
          path: deps
          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
          restore-keys: ${{ runner.os }}-mix-
      - name: Install dependencies
        run: mix deps.get
      - name: Compile
        run: mix compile
      - name: Cache build
        uses: actions/cache@v3
        with:
          path: _build
          key: ${{ runner.os }}-build-${{ hashFiles('**/mix.lock') }}
          restore-keys: ${{ runner.os }}-build-

  credo:
    name: Run Credo
    needs: build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Set up Elixir
        uses: erlef/setup-beam@v1
        with:
          elixir-version: "1.17.1"
          otp-version: "27.0"
      - name: Restore dependencies cache
        uses: actions/cache@v3
        with:
          path: deps
          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
      - name: Restore build cache
        uses: actions/cache@v3
        with:
          path: _build
          key: ${{ runner.os }}-build-${{ hashFiles('**/mix.lock') }}
      - name: Run Credo
        run: mix credo

  unused_deps:
    name: Check unused dependencies
    needs: build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Set up Elixir
        uses: erlef/setup-beam@v1
        with:
          elixir-version: "1.17.1"
          otp-version: "27.0"
      - name: Restore dependencies cache
        uses: actions/cache@v3
        with:
          path: deps
          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
      - name: Restore build cache
        uses: actions/cache@v3
        with:
          path: _build
          key: ${{ runner.os }}-build-${{ hashFiles('**/mix.lock') }}
      - name: Check for unused dependencies
        run: mix deps.unlock --check-unused

  unused_functions:
    name: Check unused functions
    needs: build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Set up Elixir
        uses: erlef/setup-beam@v1
        with:
          elixir-version: "1.17.1"
          otp-version: "27.0"
      - name: Restore dependencies cache
        uses: actions/cache@v3
        with:
          path: deps
          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
      - name: Restore build cache
        uses: actions/cache@v3
        with:
          path: _build
          key: ${{ runner.os }}-build-${{ hashFiles('**/mix.lock') }}
      - name: Check for unused functions
        run: mix xref unreachable

  test:
    name: Run tests
    needs: build
    runs-on: ubuntu-latest
    services:
      db:
        image: postgres:13
        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@v3
      - name: Set up Elixir
        uses: erlef/setup-beam@v1
        with:
          elixir-version: "1.17.1"
          otp-version: "27.0"
      - name: Restore dependencies cache
        uses: actions/cache@v3
        with:
          path: deps
          key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
      - name: Restore build cache
        uses: actions/cache@v3
        with:
          path: _build
          key: ${{ runner.os }}-build-${{ hashFiles('**/mix.lock') }}
      - name: Run tests
        run: mix test
  deploy:
    name: Deploy to Fly.io
    needs: [build, credo, unused_deps, unused_functions, test]
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    runs-on: ubuntu-latest
    environment: handin-production
    steps:
      - uses: actions/checkout@v3
      - name: Set up Fly
        uses: superfly/flyctl-actions/setup-flyctl@master
      - name: Deploy to Fly.io
        run: flyctl deploy --remote-only
        env:
          FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}