docker.yml

name: Docker Build

on:
  push:
    branches:
      - main
  workflow_call:
    inputs:
      tag:
        description: 'Docker tag'
        required: true
        type: string
        default: 'latest'
  workflow_dispatch:
    inputs:
      tag:
        description: 'Docker tag'
        required: true
        type: string
        default: 'latest'

jobs:
  build:
    runs-on: ubuntu-24.04
    steps:
    - uses: actions/checkout@v4
    - name: Set Docker tag
      if: github.event_name != 'push' && ${{ inputs.tag }}
      run: echo "DOCKER_TAG=${{ inputs.tag }}" >> $GITHUB_ENV
    - name: Use default Docker tag
      if: github.event_name == 'push'
      run: echo "DOCKER_TAG=latest" >> $GITHUB_ENV
    - name: Set lowercase repository name
      run: echo "REPOSITORY_LC=${REPOSITORY,,}" >> $GITHUB_ENV
      env:
        REPOSITORY: '${{ github.repository }}'
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v3
    - name: Login to GitHub registry
      uses: docker/login-action@v3
      with:
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}
        registry: ghcr.io
    - uses: docker/build-push-action@v6
      with:
        push: true
        tags: ghcr.io/${{ env.REPOSITORY_LC }}:${{ env.DOCKER_TAG }}