name: Release web image

# Builds ghcr.io/mountain-loop/yaak-web: the browser client and the server that serves it.
# One image per architecture on its own native runner (emulating a Rust release build is hours),
# joined into one multi-arch tag at the end.

on:
  push:
    tags: [v*]
  workflow_dispatch:
    inputs:
      version:
        description: Version to publish, without the v (e.g. 2026.2.0). Empty publishes main and sha tags only.
        required: false
        type: string

permissions:
  contents: read
  packages: write

env:
  IMAGE: ghcr.io/mountain-loop/yaak-web

jobs:
  build:
    if: github.repository == 'mountain-loop/yaak'
    name: Build ${{ matrix.platform }}
    runs-on: ${{ matrix.runner }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: linux/amd64
            runner: ubuntu-22.04
            arch: amd64
          - platform: linux/arm64
            runner: ubuntu-22.04-arm
            arch: arm64

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

      - name: Set up Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          file: Dockerfile.web
          platforms: ${{ matrix.platform }}
          outputs: type=image,name=${{ env.IMAGE }},push-by-digest=true,name-canonical=true,push=true

      - name: Export digest
        run: |
          mkdir -p "${{ runner.temp }}/digests"
          digest="${{ steps.build.outputs.digest }}"
          touch "${{ runner.temp }}/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digest-${{ matrix.arch }}
          path: ${{ runner.temp }}/digests/*
          if-no-files-found: error
          retention-days: 1

  publish:
    name: Publish manifest
    needs: build
    runs-on: ubuntu-latest

    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: ${{ runner.temp }}/digests
          pattern: digest-*
          merge-multiple: true

      - name: Set up Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # `latest` follows a release tag, and a manual run that names a version — the way to
      # publish before the first release. A prerelease (v2026.2.1-beta.1) never takes it.
      - name: Tags
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE }}
          flavor: latest=false
          tags: |
            type=semver,pattern={{version}}
            type=raw,value=${{ inputs.version }},enable=${{ inputs.version != '' }}
            type=raw,value=latest,enable=${{ inputs.version != '' || (github.event_name == 'push' && !contains(github.ref_name, '-')) }}
            type=ref,event=branch
            type=sha,format=short

      - name: Create and push the manifest
        working-directory: ${{ runner.temp }}/digests
        run: |
          docker buildx imagetools create \
            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.IMAGE }}@sha256:%s ' *)

      - name: Inspect
        run: docker buildx imagetools inspect ${{ env.IMAGE }}:${{ steps.meta.outputs.version }}