docker_pr_receive.yaml

name: "Bot: Receive Pull Request"
description: "Receive a pull request and build the markdown source files"
on:
  pull_request:
    types:
      [opened, synchronize, reopened]
  workflow_dispatch:
    inputs:
      pr_number:
        type: number
        required: true

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

permissions:
  contents: read
  pull-requests: write

jobs:
  preflight:
    name: "Preflight: md-outputs exists?"
    runs-on: ubuntu-latest
    outputs:
      branch-exists: ${{ steps.check.outputs.exists }}
    steps:
      - name: "Checkout Lesson"
        uses: actions/checkout@v6

      - name: "Check if md-outputs branch exists"
        id: check
        run: |
          # 💡 Checking for md-outputs branch #
          if [[ -n $(git ls-remote --exit-code --heads origin md-outputs) ]]; then
            echo "exists=true" >> $GITHUB_OUTPUT
          else
            echo "exists=false" >> $GITHUB_OUTPUT
            echo "::error::md-outputs branch required but does not exist."
            echo "::error::Please merge any open package update PRs to trigger the '03 Maintain: Apply Package Cache' and '01: Maintain: Build and Deploy Site' workflows."

            echo "## ❌ ERROR: md-outputs branch required" >> $GITHUB_STEP_SUMMARY
            echo "Please merge any open package update PRs to trigger the '03 Maintain: Apply Package Cache' and '01: Maintain: Build and Deploy Site' workflows." >> $GITHUB_STEP_SUMMARY

            exit 1
          fi
        shell: bash

  test-pr:
    name: "Record PR number"
    if: |
      github.event.action != 'closed' &&
      needs.preflight.outputs.branch-exists == 'true'
    runs-on: ubuntu-latest
    needs: preflight
    outputs:
      is_valid: ${{ steps.check-pr.outputs.VALID }}
      pr_number: ${{ env.NR }}
      pr_branch: ${{ env.PR_BRANCH }}
    steps:
      - name: "Grab PR"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          if [[ "${{ github.event_name }}" == "pull_request" ]] ; then
            PR_NUMBER=${{ github.event.number }}
          elif [[ "${{ github.event_name }}" == "workflow_dispatch" ]] ; then
            PR_NUMBER=${{ inputs.pr_number }}
          fi

          echo $PR_NUMBER > ${{ github.workspace }}/NR
          echo "NR=$PR_NUMBER" >> $GITHUB_ENV
          echo "PR_BRANCH=$(gh -R ${{ github.repository }} pr view $PR_NUMBER --json headRefName --jq '.headRefName')" >> $GITHUB_ENV
        shell: bash

      - name: "Upload PR number"
        id: upload
        if: always()
        uses: actions/upload-artifact@v7
        with:
          name: pr
          path: ${{ github.workspace }}/NR

      - name: "Get Invalid Hashes File"
        id: hash
        run: |
          echo "json<<EOF
          $(curl -sL https://files.carpentries.org/invalid-hashes.json)
          EOF" >> $GITHUB_OUTPUT
        shell: bash

      - name: "Debug Hashes Output"
        run: |
          echo "${{ steps.hash.outputs.json }}"
        shell: bash

      - name: "Check PR"
        id: check-pr
        uses: carpentries/actions/check-valid-pr@v1
        with:
          pr: ${{ env.NR }}
          invalid: ${{ fromJSON(steps.hash.outputs.json)[github.repository] }}

  check-renv:
    name: "Check If We Need {renv}"
    runs-on: ubuntu-latest
    outputs:
      renv-needed: ${{ steps.renv-check.outputs.renv-needed }}
      renv-cache-hashsum: ${{ steps.renv-check.outputs.renv-cache-hashsum }}
      dependency-image-ref: ${{ steps.renv-check.outputs.dependency-image-ref }}
    steps:
      - name: "Checkout Lesson"
        uses: actions/checkout@v6

      - name: "Is renv required?"
        id: renv-check
        uses: carpentries/actions/renv-checks@v1
        with:
          CACHE_VERSION: ${{ inputs.CACHE_VERSION || '' }}
          skip-cache-check: true

  build-md-source:
    name: "Build markdown source files if valid"
    needs:
      - test-pr
      - check-renv
    runs-on: ubuntu-latest
    if: needs.test-pr.outputs.is_valid == 'true'
    env:
      CHIVE: ${{ github.workspace }}/site/chive
      PR: ${{ github.workspace }}/site/pr
      GHWMD: ${{ github.workspace }}/site/built
      PR_BRANCH: ${{ needs.test-pr.outputs.pr_branch }}
      PR_NUMBER: ${{ needs.test-pr.outputs.pr_number }}
    permissions:
      contents: read
    container:
      image: ${{ needs.check-renv.outputs.dependency-image-ref }}
      env:
        WORKBENCH_PROFILE: "ci"
        GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        RENV_PATHS_ROOT: /home/rstudio/lesson/renv
        RENV_PROFILE: "lesson-requirements"
        RENV_CONFIG_EXTERNAL_LIBRARIES: "/usr/local/lib/R/site-library"
      volumes:
        - ${{ github.workspace }}:/home/rstudio/lesson
      options: --cpus 2
    outputs:
      build-site: ${{ steps.build-site.outcome }}
    steps:
      - uses: actions/checkout@v6

      - name: "Check Out Staging Branch"
        uses: actions/checkout@v6
        with:
          ref: md-outputs
          path: ${{ env.GHWMD }}

      - name: Mark Repository as Safe
        run: |
          git config --global --add safe.directory $(pwd)
          git config --global --add safe.directory /home/rstudio/lesson
        shell: bash

      - name: "Ensure sandpaper is loadable"
        run: |
          .libPaths()
          library(sandpaper)
        shell: Rscript {0}

      - name: Setup Lesson Dependencies
        run: |
          Rscript /home/rstudio/.workbench/setup_lesson_deps.R
        shell: bash

      - name: "Validate and Build Markdown"
        id: build-site
        run: |
          sandpaper::package_cache_trigger(TRUE)
          sandpaper::validate_lesson(path = '/home/rstudio/lesson')
          sandpaper:::build_markdown(path = '/home/rstudio/lesson', quiet = FALSE)
        shell: Rscript {0}

      - name: "Generate Artifacts"
        id: generate-artifacts
        run: |
          sandpaper:::ci_bundle_pr_artifacts(
            repo         = '${{ github.repository }}',
            pr_number    = '${{ env.PR_NUMBER }}',
            path_md      = '/home/rstudio/lesson/site/built',
            path_pr      = '/home/rstudio/lesson/site/pr',
            path_archive = '/home/rstudio/lesson/site/chive',
            branch       = 'md-outputs'
          )
        shell: Rscript {0}

      - name: "Upload PR"
        uses: actions/upload-artifact@v7
        with:
          name: pr
          path: ${{ env.PR }}
          overwrite: true

      - name: "Upload Diff"
        uses: actions/upload-artifact@v7
        with:
          name: diff
          path: ${{ env.CHIVE }}
          retention-days: 1

      - name: "Upload Build"
        uses: actions/upload-artifact@v7
        with:
          name: built
          path: ${{ env.GHWMD }}
          retention-days: 1

      - name: "Teardown"
        run: sandpaper::reset_site()
        shell: Rscript {0}