# SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
#
# SPDX-License-Identifier: AGPL-3.0-only

name: Frontend / build docker image

on:
  push:
    branches: [ develop ]

defaults:
  run:
    working-directory: frontend

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

jobs:
  changes:
    name: Check for frontend changes
    runs-on: ubuntu-latest
    permissions:
      pull-requests: read
    outputs:
      changed: ${{ steps.changed.outputs.files }}
    steps:
      - uses: actions/checkout@v3
      - name: Check for frontend file changes
        uses: dorny/paths-filter@v2
        id: changed
        with:
          filters: |
            files:
              - 'frontend/**'
              - '.github/**'
              - '.yarn/**'

  build:
    needs: changes
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        if: needs.changes.outputs.changed == 'true'

      - name: Generate Docker metadata
        if: needs.changes.outputs.changed == 'true'
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ghcr.io/${{ github.repository_owner }}/${{ github.event.repository.name }}
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}

      - name: Set up QEMU
        if: needs.changes.outputs.changed == 'true'
        uses: docker/setup-qemu-action@v2

      - name: Set up Docker Buildx
        if: needs.changes.outputs.changed == 'true'
        uses: docker/setup-buildx-action@v2

      - name: Login to GHCR
        if: github.event_name != 'pull_request' && needs.changes.outputs.changed == 'true'
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push
        if: needs.changes.outputs.changed == 'true'
        uses: docker/build-push-action@v3
        with:
          push: true
          file: frontend/Dockerfile
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          context: .
          build-args: |
            BUILD_VERSION=${{ github.event.head_commit.id }}