release.yml

name: Create Release

on:
  workflow_call:
    inputs:
      version:
        description: The semantic tag version against which the release will be created
        required: true
        type: string
    secrets:
      DOCKER_USERNAME:
        required: true
      DOCKER_PASSWORD:
        required: true
  push:
    tags:
      - v*

jobs:
  create-release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0 ## Required for goreleaser - https://goreleaser.com/ci/actions/#usage

      - name: Extract Current Tag
        run: |
          current=${GITHUB_REF#refs/tags/}
          if [[ -n $CURRENT_TAG ]]; then
            current=$CURRENT_TAG
          fi
          echo "::set-output name=tag::$current"
        id: current-tag
        env:
          CURRENT_TAG: ${{ inputs.version }}

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version-file: go.mod

      - name: Create Github Release
        uses: goreleaser/goreleaser-action@v5
        with:
          args: release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Login to DockerHub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Build and Push Docker Image
        uses: docker/build-push-action@v5
        with:
          push: true
          tags: |
            mercari/spanner-autoscaler:latest
            mercari/spanner-autoscaler:${{ steps.current-tag.outputs.tag }}

      - name: Get Merged Pull Request
        uses: actions-ecosystem/action-get-merged-pull-request@v1
        id: get-merged-pull-request
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}

      - name: Comment on Pull Request
        uses: actions-ecosystem/action-create-comment@v1
        if: ${{ steps.get-merged-pull-request.outputs.number != null }}
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          number: ${{ steps.get-merged-pull-request.outputs.number }}
          body: |
            A new github release with version [${{ steps.current-tag.outputs.tag }}](https://github.com/${{ github.repository }}/releases/tag/${{ steps.current-tag.outputs.tag }}) has been created! :tada: