go-ci.yml

name: Go CI/CD

on:
  push:
    branches: [ main ]
    tags: 
      - 'v[0-9]+.[0-9]+.[0-9]+'  # Matches v0.1.0, v1.0.0, etc.
  pull_request:
    branches: [ main ]

permissions:
  contents: write
  pull-requests: write

jobs:
  test:
    name: Test & Lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Go
        uses: actions/setup-go@v4
        with:
          go-version: '1.21'
          cache: true
    
      - name: Install dependencies
        run: |
          go mod download
          go install golang.org/x/tools/cmd/goimports@latest

      - name: Run tests
        run: go test -race -coverprofile=coverage.txt -covermode=atomic ./...

      - name: Run golangci-lint
        uses: golangci/golangci-lint-action@v3
        with:
          version: latest
          args: --timeout=5m --out-format=colored-line-number --issues-exit-code=1
          only-new-issues: true
          skip-pkg-cache: true
          skip-build-cache: false

      - name: Upload coverage
        if: success()
        uses: codecov/codecov-action@v3
        with:
          file: ./coverage.txt
          fail_ci_if_error: false
          verbose: true

  build:
    name: Build Binary
    needs: test
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Go
        uses: actions/setup-go@v4
        with:
          go-version: '1.21'
          cache: true

      - name: Build
        run: |
          VERSION=$(git describe --tags --always --dirty)
          mkdir -p hapax
          go build -v -ldflags="-X main.Version=${VERSION}" -o hapax/hapax .
        
      - name: Upload artifact
        uses: actions/upload-artifact@v4
        with:
          name: hapax-binary
          path: ./hapax
          retention-days: 5

  release:
    name: Create Release
    needs: [test, build]
    runs-on: ubuntu-latest
    if: github.event_name == 'push' && contains(github.ref, 'refs/tags/v')
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Generate changelog
        id: changelog
        run: |
          echo "CHANGELOG<<EOF" >> $GITHUB_ENV
          
          # Get tag message for overview
          TAG_MSG=$(git tag -l --format='%(contents)' $(git describe --tags --abbrev=0))
          echo "$TAG_MSG" >> $GITHUB_ENV
          echo "" >> $GITHUB_ENV
          
          # For first release, get all commits
          if ! git tag --sort=-v:refname | grep -q '^v'; then
            RANGE="$(git rev-list --max-parents=0 HEAD)..HEAD"
          else
            RANGE="$(git describe --tags --abbrev=0 HEAD^)..HEAD"
          fi
          
          echo "## Changes" >> $GITHUB_ENV
          echo "" >> $GITHUB_ENV
          
          # Features
          echo "### Features" >> $GITHUB_ENV
          # First maintainer commits without attribution
          git log $RANGE --pretty=format:'* %s ([%h](https://github.com/teilomillet/hapax/commit/%H))' --author="teilomillet" | grep -i '^* feat' | sed 's/feat: /* /' >> $GITHUB_ENV || true
          # Then contributor commits with attribution
          git log $RANGE --pretty=format:'* %s (%aN) ([%h](https://github.com/teilomillet/hapax/commit/%H))' | grep -i '^* feat' | grep -v '(teilomillet)' | sed 's/feat: /* /' >> $GITHUB_ENV || true
          echo "" >> $GITHUB_ENV
          
          # Fixes
          echo "### Bug Fixes" >> $GITHUB_ENV
          # Maintainer fixes without attribution
          git log $RANGE --pretty=format:'* %s ([%h](https://github.com/teilomillet/hapax/commit/%H))' --author="teilomillet" | grep -i '^* fix' | sed 's/fix: /* /' >> $GITHUB_ENV || true
          # Contributor fixes with attribution
          git log $RANGE --pretty=format:'* %s (%aN) ([%h](https://github.com/teilomillet/hapax/commit/%H))' | grep -i '^* fix' | grep -v '(teilomillet)' | sed 's/fix: /* /' >> $GITHUB_ENV || true
          echo "" >> $GITHUB_ENV
          
          # Documentation
          echo "### Documentation" >> $GITHUB_ENV
          # Maintainer docs without attribution
          git log $RANGE --pretty=format:'* %s ([%h](https://github.com/teilomillet/hapax/commit/%H))' --author="teilomillet" | grep -i '^* docs' | sed 's/docs: /* /' >> $GITHUB_ENV || true
          # Contributor docs with attribution
          git log $RANGE --pretty=format:'* %s (%aN) ([%h](https://github.com/teilomillet/hapax/commit/%H))' | grep -i '^* docs' | grep -v '(teilomillet)' | sed 's/docs: /* /' >> $GITHUB_ENV || true
          echo "" >> $GITHUB_ENV

          # Dependencies
          echo "## Dependency Updates" >> $GITHUB_ENV
          echo "" >> $GITHUB_ENV
          if [ -f "go.mod" ]; then
            echo '```diff' >> $GITHUB_ENV
            if git rev-parse --verify HEAD^ >/dev/null 2>&1; then
              git diff HEAD^ HEAD go.mod | grep '^[+-]' | grep -v '^[+-]module' >> $GITHUB_ENV || true
            fi
            echo '```' >> $GITHUB_ENV
          fi
          echo "" >> $GITHUB_ENV
          
          # List contributors (excluding maintainer)
          echo "## Contributors" >> $GITHUB_ENV
          git log $RANGE --format='%aN' | sort -u | grep -v 'teilomillet' | while read name; do
            echo "* @$name" >> $GITHUB_ENV
          done
          
          echo "EOF" >> $GITHUB_ENV

      - name: Download binary
        uses: actions/download-artifact@v4
        with:
          name: hapax-binary
          path: ./

      - name: Create Release
        uses: softprops/action-gh-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          body: ${{ env.CHANGELOG }}
          files: ./hapax/hapax
          draft: false
          prerelease: false
          generate_release_notes: false