push-to-registry/.github/workflows/verify-push.yaml

# This workflow will perform a test whenever there
# is some change in code done to ensure that the changes
# are not buggy and we are getting the desired output.
name: Test Push
on: [push, pull_request, workflow_dispatch]
env:
  IMAGE_NAME: hello-world
  IMAGE_REGISTRY: quay.io
  IMAGE_TAG: latest

jobs:
  build:
    name: Push image to Quay.io
    runs-on: ubuntu-latest
    steps:
      # Fetch name of the Forked Repository with Branch
      # if workflow is triggered from pull request
      - name: Fetch PR head repo and branch name
        if: github.event_name == 'pull_request'
        run: |
          HEAD_REPO_NAME=$(jq -r '.pull_request.head.repo.full_name' "$GITHUB_EVENT_PATH")
          echo "PR head repo: $HEAD_REPO_NAME"
          echo "repo=$HEAD_REPO_NAME" >> $GITHUB_ENV
          echo "branch=$GITHUB_HEAD_REF" >> $GITHUB_ENV

      # Extract repository name with branch
      - name: Fetch Repository name with branch
        if: github.event_name != 'pull_request'
        shell: bash
        run: |
          echo "repo=$GITHUB_REPOSITORY" >> $GITHUB_ENV
          echo "branch=${GITHUB_REF#refs/heads/}" >> $GITHUB_ENV

      # Checkout push-to-registry action github repository
      - name: Checkout Push to Registry action
        uses: actions/checkout@v2
        with:
          repository: ${{ env.repo }}
          ref: ${{ env.branch }}

      # Pull hello-world image to push in next step
      - name: Pull Hello world image
        run: docker pull ${{ env.IMAGE_NAME }}

      # Push the image to image registry 
      - name: Push To Quay
        uses: ./
        with:
          image: ${{ env.IMAGE_NAME }}
          tag: ${{ env.IMAGE_TAG }}
          registry: ${{ env.IMAGE_REGISTRY }}/${{ secrets.REGISTRY_USER }}
          username: ${{ secrets.REGISTRY_USER }}
          password: ${{ secrets.REGISTRY_PASSWORD }}