ci-docker.yml

name: Docker

on:
  workflow_dispatch:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}

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

jobs:
  docker-build:
    name: Build Docker Images
    runs-on: ubuntu-latest
    permissions: write-all

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: ${{ vars.GO_VERSION }}
          cache-dependency-path: "**/*.sum"

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry
        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Shorten hash
        id: shorten_hash
        run: echo "HASH=$(git rev-parse --short ${{ github.sha }})" >> $GITHUB_ENV

      - name: Lowercase Image Name
        run: echo "LOWER_IMAGE_NAME=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV

      - name: Build app
        run: |
          docker build -t ${{ env.LOWER_IMAGE_NAME }}:${{ env.HASH }} -t ${{ env.LOWER_IMAGE_NAME }}:latest .
          echo "hash=$hash" >> $GITHUB_ENV

      - name: Push app
        if: ${{ github.event_name != 'pull_request' }}
        run: |
          docker push ${{ env.LOWER_IMAGE_NAME }}:$hash
          docker push ${{ env.LOWER_IMAGE_NAME }}:latest