build-and-push.yml

name: Push Docker Image to GitHub Container Registry

on:
  push:
    branches:
      - main
    tags:
      - v*
  workflow_dispatch:
    inputs:
      tag:
        description: 'Tag'
        required: true
        default: 'develop'

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-and-push:
    name: Docker Build and Push
    runs-on: ubuntu-latest

    concurrency:
      group: ${{ github.workflow }}-${{ github.ref }}
      cancel-in-progress: true

    permissions:
      contents: read
      packages: write

    steps:
      - name: lowercase the IMAGE_NAME
        run: echo IMAGE_NAME="${IMAGE_NAME,,}" >> $GITHUB_ENV

      - name: Get Tags
        run: |
          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
            TAG=${{ github.event.inputs.tag }}
          elif [[ $GITHUB_REF == refs/tags/* ]]; then
            TAG=${GITHUB_REF#refs/tags/}
          else
            TAG=${GITHUB_REF#refs/heads/}

            if [[ $TAG == main ]]; then
              TAG=latest
            fi
          fi
          echo "TAG=$TAG" >> "$GITHUB_ENV"

      - name: Check out the repo
        uses: actions/checkout@v4

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

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Tag Docker image
        run: |
          echo "IMAGE_TAG=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.TAG }}" >> "$GITHUB_ENV"

          if [[ ${{ env.TAG }} == v* ]]; then
            echo "LATEST_TAG=,${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest" >> "$GITHUB_ENV"
          fi

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: ${{ env.IMAGE_TAG }}${{ env.LATEST_TAG }}