.github/workflows/lint.yml

# Create initial workflow based on GitHub's suggestion for Elixir.

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

env:
  MIX_ENV: test

jobs:
  lint:
    name: Lint codebase
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Set up Elixir
        uses: erlef/setup-beam@v1
        with:
          elixir-version: '1.16.0'
          otp-version: '26.0'
      - name: Cache dependencies
        id: cache-deps
        uses: actions/cache@v4
        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 }}-
      - name: Cache compiled build
        id: cache-build
        uses: actions/cache@v4
        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-

      - name: Clean dependencies to rule out incremental build as source of failures
        if: github.run_attempt != '1'
        run: |
          mix deps.clean --all
          mix clean
        shell: sh

      - name: Install dependencies
        run: mix deps.get

      - name: Compile
        run: mix compile

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

      - name: Check code style
        run: mix credo --all-priorities