name: Test template
on:
  push:
    branches: gh-pages
  pull_request:
jobs:
  check-template:
    name: ${{ matrix.lesson-name }} (${{ matrix.os-name }})
    if: github.repository == 'carpentries/styles'
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        lesson: [swcarpentry/shell-novice, datacarpentry/r-intro-geospatial, librarycarpentry/lc-git]
        os: [ubuntu-20.04, macos-latest, windows-latest]
        include:
          - os: ubuntu-20.04
            os-name: Ubuntu
          - os: macos-latest
            os-name: macOS
          - os: windows-latest
            os-name: Windows
          - lesson: swcarpentry/shell-novice
            lesson-name: (SWC) Shell novice
          - lesson: datacarpentry/r-intro-geospatial
            lesson-name: (DC) R Intro Geospatial
          - lesson: librarycarpentry/lc-git
            lesson-name: (LC) Intro to Git
    defaults:
      run:
        shell: bash # forces 'Git for Windows' on Windows
    env:
      RSPM: 'https://packagemanager.rstudio.com/cran/__linux__/focal/latest'
    steps:
      - name: Set up Ruby
        uses: actions/setup-ruby@v1
        with:
          ruby-version: '2.7'

      - name: Set up Python
        uses: actions/setup-python@v2
        with:
          python-version: '3.x'

      - name: Install GitHub Pages, Bundler, and kramdown gems
        run: |
          gem install github-pages bundler kramdown

      - name: Install Python modules
        run: |
          if [[ $RUNNER_OS == macOS || $RUNNER_OS == Linux ]]; then
            python3 -m pip install --upgrade pip setuptools wheel pyyaml==5.3.1 requests
          elif [[ $RUNNER_OS == Windows ]]; then
            python -m pip install --upgrade pip setuptools wheel pyyaml==5.3.1 requests
          fi

      - name: Checkout the ${{ matrix.lesson }} lesson
        uses: actions/checkout@master
        with:
          repository: ${{ matrix.lesson }}
          path: lesson
          fetch-depth: 0

      - name: Determine the proper reference to use
        id: styles-ref
        run: |
          if [[ -n "${{ github.event.pull_request.number }}" ]]; then
            echo "::set-output name=ref::refs/pull/${{ github.event.pull_request.number }}/head"
          else
            echo "::set-output name=ref::gh-pages"
          fi

      - name: Sync lesson with carpentries/styles
        working-directory: lesson
        run: |
          git config --global user.email "team@carpentries.org"
          git config --global user.name "The Carpentries Bot"
          git remote add styles https://github.com/carpentries/styles.git
          git config --local remote.styles.tagOpt --no-tags
          git fetch styles ${{ steps.styles-ref.outputs.ref }}:styles-ref
          git merge -s recursive -Xtheirs --no-commit styles-ref
          git commit -m "Sync lesson with carpentries/styles"

      - name: Look for R-markdown files
        id: check-rmd
        working-directory: lesson
        run: |
          echo "::set-output name=count::$(shopt -s nullglob; files=($(find . -iname '*.Rmd')); echo ${#files[@]})"

      - name: Set up R
        if: steps.check-rmd.outputs.count != 0
        uses: r-lib/actions/setup-r@master
        with:
          r-version: 'release'

      - name: Install needed packages
        if: steps.check-rmd.outputs.count != 0
        run: |
          install.packages(setdiff(c('remotes', 'rprojroot', 'renv', 'desc', 'rmarkdown', 'knitr'), rownames(installed.packages())))
        shell: Rscript {0}

      - name: Query dependencies
        if: steps.check-rmd.outputs.count != 0
        working-directory: lesson
        run: |
          source('bin/dependencies.R')
          deps <- identify_dependencies()
          create_description(deps)
          saveRDS(remotes::dev_package_deps(dependencies = TRUE), ".github/depends.Rds", version = 2)
          writeLines(sprintf("R-%i.%i", getRversion()$major, getRversion()$minor), ".github/R-version")
        shell: Rscript {0}

      - name: Cache R packages
        if: runner.os != 'Windows' && steps.check-rmd.outputs.count != 0
        uses: actions/cache@v1
        with:
          path: ${{ env.R_LIBS_USER }}
          key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
          restore-keys: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-

      - name: Install stringi from source
        if: runner.os == 'Linux' && steps.check-rmd.outputs.count != 0
        run: install.packages('stringi', repos='https://cloud.r-project.org')
        shell: Rscript {0}

      - name: Install system dependencies for R packages
        if: runner.os == 'Linux' && steps.check-rmd.outputs.count != 0
        working-directory: lesson
        run: |
          while read -r cmd
          do
            eval sudo $cmd
          done < <(Rscript -e 'cat(remotes::system_requirements("ubuntu", "20.04"), sep = "\n")')

      - run: make site
        working-directory: lesson