# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
name: Docker Image

on:
  push:
    # Tags are explicitly ignored on push. We still want branches to be processed, but they won't if
    # the `branches` property is missing. See more detail here:
    # https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#onpushbranchestagsbranches-ignoretags-ignore
    tags-ignore: ["*"]
    branches: ["*"]
    paths:
      - docker/**
      - .github/workflows/docker.yml

  pull_request:
    paths:
      - docker/**
      - .github/workflows/docker.yml

  release:
    types: [published]

  workflow_dispatch:
    inputs:
      release_tag:
        description: Release Tag
        required: true
        type: string
      should_publish:
        description: Publish Image to GHCR?
        required: false
        default: false
        type: boolean

env:
  SHOULD_PUBLISH: ${{ github.event_name == 'release' || inputs.should_publish == 'true' || github.event.ref == 'refs/heads/master' }}
  VERSION: ${{ github.event.release.tag_name || inputs.release_tag }}

jobs:
  docker:
    name: Build & Push Docker Image
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2

      - name: Set up Buildx
        uses: docker/setup-buildx-action@v2

      - name: Check if tag is a version number
        id: check_version
        run: |
          regex="[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+"
          if [[ '${{ env.VERSION }}' =~ $regex ]]; then
            echo ::set-output name=match::true
          else
            echo ::set-output name=match::false
          fi

      - name: Set Version Tags
        id: meta
        uses: docker/metadata-action@v4
        env:
          SEMVER: type=semver,enable=${{ steps.check_version.outputs.match }},value=${{ env.VERSION }}
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=edge,branch=master
            ${{ env.SEMVER }},pattern={{major}}.{{minor}}.{{patch}}
            ${{ env.SEMVER }},pattern={{major}}.{{minor}}
            ${{ env.SEMVER }},pattern={{major}}

      - name: Login to GHCR
        if: env.SHOULD_PUBLISH
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build & Push Image
        uses: docker/build-push-action@v3
        with:
          context: ./docker
          push: ${{ env.SHOULD_PUBLISH }}
          no-cache: true
          build-args: |
            REPOSITORY=${{ github.repository }}
            ${{ env.VERSION && format('RELEASE_TAG={0}', env.VERSION) }}
          platforms: linux/arm/v7,linux/arm64,linux/amd64
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}