release.yml

name: Release to GHCR & Helm Sync

on:
  pull_request:
    paths:
      - pyproject.toml

jobs:
  check-version:
    runs-on: ubuntu-latest
    outputs:
      should_skip: ${{ steps.check.outputs.should_skip }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Check if pyproject.toml version changed
        id: check
        run: |
          if git rev-parse HEAD^ >/dev/null 2>&1; then
            DIFF=$(git diff -U0 HEAD^ -- pyproject.toml)
          else
            DIFF=$(git show HEAD:pyproject.toml)
          fi

          echo "DIFF=$DIFF"

          if echo "$DIFF" | grep -E '^+\s*version\s*='; then
            echo "should_skip=false" >> $GITHUB_OUTPUT
            echo "Detected version change. should_skip=false"
          else
            echo "should_skip=true" >> $GITHUB_OUTPUT
            echo "No version change found. should_skip=true"
          fi

  build-and-push:
    name: Build & Push to GHCR using pyproject version
    needs: check-version
    if: needs.check-version.outputs.should_skip != 'true'
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    env:
      GHCR_IMAGE: ghcr.io/${{ github.repository }}
    outputs:
      version: ${{ steps.version.outputs.VERSION }}
      image: ${{ steps.version.outputs.IMAGE }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Extract version from pyproject.toml
        id: version
        run: |
          VERSION=$(grep -Po '(?<=^version = ")[^"]+' pyproject.toml)
          echo "VERSION=$VERSION"
          echo "VERSION_TAG=v$VERSION" >> $GITHUB_ENV

          echo "VERSION=$VERSION" >> $GITHUB_OUTPUT
          echo "IMAGE=${{ env.GHCR_IMAGE }}" >> $GITHUB_OUTPUT

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and Push Docker image to GHCR
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          push: true
          tags: |
            ${{ env.GHCR_IMAGE }}:${{ env.VERSION_TAG }}

  update-helm-values:
    name: Update Helm Values
    needs: build-and-push
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: "${{ github.head_ref || github.ref_name }}"
          fetch-depth: 0 # important for PR creation

      - name: Set up Git config
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Define file paths
        id: files
        run: |
          echo "CHART_FILE=deployments/model-serving/Chart.yaml" >> $GITHUB_ENV
          echo "VALUE_FILE=deployments/model-serving/values.yaml" >> $GITHUB_ENV

      - name: Install yq
        run: |
          sudo wget https://github.com/mikefarah/yq/releases/download/v4.40.5/yq_linux_amd64 -O /usr/bin/yq
          sudo chmod +x /usr/bin/yq

      - name: Update Chart.yaml & values.yaml with version
        run: |
          VERSION="v${{ needs.build-and-push.outputs.version }}"
          IMAGE="${{ needs.build-and-push.outputs.image }}"

          yq eval ".version = \"${VERSION#v}\" |
                   .appVersion = \"${VERSION#v}\"" \
                   -i "$CHART_FILE"

          yq eval ".image.repository = \"$IMAGE\" |
                   .image.tag = \"$VERSION\"" \
                   -i "$VALUE_FILE"

          git add "$CHART_FILE" "$VALUE_FILE"
          git commit -m "ci: update Helm values.yaml and Chart.yaml to $IMAGE:$VERSION"
          git push origin HEAD