ci.yml

name: ci

on:
  push:
    branches: ["develop"]
    tags: ["v*"]
  pull_request:

permissions:
  contents: read

jobs:
  go:
    name: go (vet, build)
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@main
        with:
          submodules: true

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version: "1.23.x"
          cache: true

      - name: Verify gofmt
        run: |
          files=$(gofmt -l .)
          if [ -n "$files" ]; then
            echo "gofmt needed on:"
            echo "$files"
            exit 1
          fi

      - name: Tidy check (no diff)
        run: |
          go mod tidy
          git diff --exit-code

      - name: Vet
        run: go vet ./...

      - name: Build
        run: go build -trimpath -ldflags="-s -w" -o cacheppuccino .

  docker:
    name: docker (build and push)
    runs-on: ubuntu-latest
    needs: [go]

    permissions:
      contents: read
      packages: write

    outputs:
      docker_image_tag: ${{ steps.meta.outputs.version }}

    steps:
      - name: Checkout
        uses: actions/checkout@main
        with:
          submodules: true

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=sha,format=short,prefix=0.1.0-c
            type=ref,event=tag

      - name: Build and push docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
  helm:
    name: helm (package and push)
    runs-on: ubuntu-latest
    needs: [docker]
    # if: github.event_name != 'pull_request'

    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout
        uses: actions/checkout@main
        with:
          submodules: true

      - name: Setup Helm
        uses: azure/setup-helm@v4
        with:
          version: v3.15.4

      - name: Determine chart version
        id: ver
        shell: bash
        run: |
          set -euo pipefail

          if [[ "${GITHUB_REF_TYPE}" == "tag" ]]; then
            # Tag format: v0.1.0 -> 0.1.0
            VERSION="${GITHUB_REF_NAME#v}"
          else
            # Unique semver prerelease for main pushes
            SHORT_SHA="$(echo "${GITHUB_SHA}" | cut -c1-7)"
            VERSION="0.1.0-c${SHORT_SHA}"
          fi

          echo "version=${VERSION}" >> "$GITHUB_OUTPUT"

      - name: Login to GHCR (Helm OCI)
        shell: bash
        run: |
          echo "${{ secrets.GITHUB_TOKEN }}" | helm registry login ghcr.io -u "${{ github.actor }}" --password-stdin

      - name: Lint chart
        run: helm lint helm

      - name: 🐳 Helm template (snapshot)
        run: ./helm/update-snapshots.sh --check-diff-only

      - name: Tag docker image in Helm Chart values.yaml
        working-directory: helm
        env:
          IMAGE_TAG: ${{ needs.docker.outputs.docker_image_tag }}
        run: |
          # Update values.yaml with latest docker image
          sed -i "s/SET-BY-CICD-TAG/$IMAGE_TAG/" ./values.yaml


      - name: Package chart
        shell: bash
        run: |
          set -euo pipefail
          mkdir -p dist
          helm package helm \
            --destination dist \
            --version "${{ steps.ver.outputs.version }}" \
            --app-version "${{ steps.ver.outputs.version }}"

      - name: Push chart to GHCR (OCI)
        shell: bash
        run: |
          set -euo pipefail
          OWNER_LC="$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')"
          OCI_REPO="oci://ghcr.io/${OWNER_LC}"
          PACKAGE_FILE="$(ls -1 dist/cacheppuccino-*.tgz | head -n 1)"
          IMAGE="${{ needs.docker.outputs.docker_image_tag }}"

          # Add GitHub Actions summary
          echo "# Helm Chart" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo '```yaml' >> $GITHUB_STEP_SUMMARY
          helm push "$PACKAGE_FILE" "$OCI_REPO" 2>> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY