go.yml

name: Go CI / Test / Lint

permissions:
  contents: read

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

jobs:
  ci:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        go-version: [1.20, 1.21]

    steps:
    # Checkout code
    - name: Checkout repository
      uses: actions/checkout@v4

    # Go setup
    - name: Setup Go
      uses: actions/setup-go@v4
      with:
        go-version: ${{ matrix.go-version }}

    # Cache modules and build cache
    - name: Cache Go build & modules
      uses: actions/cache@v3
      with:
        path: |
          ~/.cache/go-build
          ~/go/pkg/mod
        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
        restore-keys: |
          ${{ runner.os }}-go-

    # Ensure dependencies
    - name: Go mod tidy
      run: go mod tidy

    # Lint
    - name: Run golangci-lint
      uses: golangci/golangci-lint-action@v4
      with:
        version: v1.59.0
        args: run --timeout 5m

    # Build
    - name: Build code
      run: go build -v ./...

    # Test + coverage
    - name: Run tests with coverage
      run: |
        go test ./... -coverprofile=coverage.out -failfast -timeout=30s
        go tool cover -func=coverage.out

    # Upload coverage report (optional)
    - name: Upload coverage to Codecov
      if: github.event_name != 'pull_request'
      uses: codecov/codecov-action@v4
      with:
        files: coverage.out