build-versioned-image.yaml

name: Build versioned image
run-name: Build versioned image by @${{ github.actor }}

on:
  workflow_dispatch


defaults:
  run:
    shell: bash

jobs:
  build_image:
    runs-on: ubuntu-20.04
    steps:
      - uses: actions/checkout@v4

      - name: Get ref name
        id: github-ref-name
        run: |
          ref='${{ github.ref_name }}'
          echo "Tag ref is ${ref}"
          # replace any characters not permitted in a docker tag with an underscore
          ref_name="${ref//[^A-Za-z0-9\.\-_]/_}"
          echo "Sanitised ref name is ${ref_name}"
          echo "ref=${ref_name}" >>"${GITHUB_OUTPUT}"

      - name: Get docker image tag
        id: docker-image-tag
        run: |
          sha_short=$(git rev-parse --short HEAD)
          timestamp=$(date +'%Y%m%d_%H%M%S')
          sha_tag="${ref}-${sha_short}"
          timestamp_tag="${ref}-${timestamp}"
          echo "Docker image tags are ${sha_tag} and ${timestamp_tag}"
          echo "sha_tag=${sha_tag}" >>"${GITHUB_OUTPUT}"
          echo "timestamp_tag=${timestamp_tag}" >>"${GITHUB_OUTPUT}"

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v5
        with:
          context: ./
          file: ./Dockerfile
          push: true
          tags: |
            "vocovo/docker-mosquitto:${{ steps.docker-image-tag.outputs.sha_tag }}"
            "vocovo/docker-mosquitto:${{ steps.docker-image-tag.outputs.timestamp_tag }}"