build.yaml

name: Image Builder

on:
  push:
    branches:
      - main
    paths:
      - alpine/freeze/**
      - static/freeze/**
      - ubuntu/freeze/**
  workflow_dispatch:
    inputs:
      pandoc_version:
        description: >-
          Pandoc version; must be either `main` or a release number
        default: main
        type: string
      base_system:
        description: Docker base system
        default: alpine
        type: choice
        options:
          - alpine
          - ubuntu
          - static

jobs:

  prepare:
    runs-on: ubuntu-latest
    outputs:
      base_system: ${{ steps.set-stack.outputs.stack }}
      pandoc_version: ${{ steps.set-version.outputs.version }}

    steps:
      - uses: actions/checkout@v4
      - id: set-stack
        run: |
          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
            echo "stack=${{ inputs.base_system }}" >> $GITHUB_OUTPUT
          else
            # Extract stack from the changed files paths
            CHANGED_FILES=${{ git diff --name-only ${{ github.event.before }} ${{ github.event.after }}}
            if echo "$CHANGED_FILES" | grep -q "^alpine/"; then
              echo "stack=alpine" >> $GITHUB_OUTPUT
            elif echo "$CHANGED_FILES" | grep -q "^ubuntu/"; then
              echo "stack=ubuntu" >> $GITHUB_OUTPUT
            elif echo "$CHANGED_FILES" | grep -q "^static/"; then
              echo "stack=static" >> $GITHUB_OUTPUT
            fi
          fi

      - id: set-version
        run: |
          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
            echo "version=${{ inputs.pandoc_version }}" >> $GITHUB_OUTPUT
          else
            # Extract version directly from the changed freeze file name
            CHANGED_FILES=$(git diff --name-only ${{ github.event.before }} ${{ github.event.after }})
            FREEZE_FILE=$(echo "$CHANGED_FILES" | grep '\.project\.freeze$' | head -1)
            VERSION=$(basename "$FREEZE_FILE" | sed -E 's/pandoc-(.*)\.project\.freeze/\1/')
            
            # If no version found from freeze file, default to main
            echo "version=${VERSION:-main}" >> $GITHUB_OUTPUT
          fi

  # Build images and store them as tar archive
  core:
    name: minimal and core
    needs: prepare
    runs-on: ubuntu-latest
    
    steps:
      - uses: actions/checkout@v4

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_TOKEN }}

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          version: "lab:latest"
          driver: cloud
          endpoint: "pandoc/multiarch"

      - name: minimal
        timeout-minutes: 25
        uses: ./.github/actions/build
        with:
          image_type: minimal
          base_system: ${{ needs.prepare.outputs.base_system }}
          pandoc_version: ${{ needs.prepare.outputs.pandoc_version }}
          dockerfile: ${{ needs.prepare.outputs.base_system }}/Dockerfile
          target: ${{ needs.prepare.outputs.base_system }}-minimal

      - name: core
        uses: ./.github/actions/build
        if: ${{ needs.prepare.outputs.base_system != 'static' }}
        with:
          image_type: core
          base_system: ${{ needs.prepare.outputs.base_system }}
          pandoc_version: ${{ needs.prepare.outputs.pandoc_version }}
          dockerfile: ${{ needs.prepare.outputs.base_system }}/Dockerfile
          target: ${{ needs.prepare.outputs.base_system }}-core

  typst:
    name: Typst
    if: ${{ needs.prepare.outputs.base_system != 'static' }}
    needs: [prepare, core]
    uses: ./.github/workflows/addon.yaml
    secrets: inherit
    with:
      addon: typst
      base_system: ${{ needs.prepare.outputs.base_system }}
      pandoc_version: ${{ needs.prepare.outputs.pandoc_version }}

  latex:
    name: LaTeX
    if: ${{ needs.prepare.outputs.base_system != 'static' }}
    needs: [prepare, core]
    uses: ./.github/workflows/addon.yaml
    secrets: inherit
    with:
      addon: latex
      base_system: ${{ needs.prepare.outputs.base_system }}
      pandoc_version: ${{ needs.prepare.outputs.pandoc_version }}

  extra:
    name: Extra
    needs: [prepare, latex]
    uses: ./.github/workflows/addon.yaml
    secrets: inherit
    with:
      addon: extra
      base_system: ${{ needs.prepare.outputs.base_system }}
      pandoc_version: ${{ needs.prepare.outputs.pandoc_version }}