.github/workflows/openscad_build.yml

name: Generate STL and Thumbnails using OpenSCAD

on:
  push:
    paths:
      - "*/**/*.scad"
      - "*/**/*.txt"
      - ".github/workflows/**/*"

jobs:
  build_and_deploy:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Install OpenSCAD, WebP tools, and Xvfb
        run: |
          sudo apt-get update
          sudo apt-get install -y openscad webp xvfb

      - name: Generate STL files and multiple PNG thumbnails
        run: |
          xvfb-run -a --server-args="-screen 0 1024x768x24" bash -c '
            find . -name "*.scad" | grep -v "^./lib/" | while read scad; do
                stl_path="${scad%.scad}.stl"
                openscad -o $stl_path $scad
                angles=(
                  "0,0,0,45,45,0,100"
                  "0,0,0,45,-45,180,100"
                  "0,0,0,-45,45,0,100"
                  "0,0,0,-45,-45,0,100"
                )
                count=0
                for angle in "${angles[@]}"; do
                    count=$((count+1))
                    png_path="${scad%.scad}_$count.png"
                    openscad --camera=$angle --colorscheme="Tomorrow" --render --imgsize=512,512 -o $png_path $scad
                done
            done
          '

      - name: Convert PNG thumbnails to WebP
        run: |
          for png in $(find . -name "*.png"); do
              cwebp $png -o ${png%.png}.webp
          done

      - name: Clean up directory (Only keep STL, WebP, and txt files)
        run: |
          find . ! -path "./.git/*" ! -name ".git" -type f ! \( -name "*.stl" -o -name "*.webp" -o -name "*.txt" \) -delete

      - name: Generate index.html
        run: |
          echo "<!DOCTYPE html><html><head><link href='https://cdn.jsdelivr.net/npm/tailwindcss@2.2.16/dist/tailwind.min.css' rel='stylesheet'></head><body>" > index.html
          for stl in $(find . -name "*.stl"); do
            stlName=$(basename $stl)
            echo "<h2 class='text-2xl font-bold'>$stlName</h2>" >> index.html
            txtPath="${stl%.stl}.txt"
            if [[ -f $txtPath ]]; then
                echo "<p>$(cat $txtPath | sed 's/$/<br \/>/')</p>" >> index.html
            fi
            echo "<div class='grid grid-cols-4 gap-4'>" >> index.html
            for i in {1..4}; do
                webp="${stl%.stl}_$i.webp"
                baseName=$(basename -s .webp $webp)
                echo "<img class='w-24 h-24' src='$webp' title='$baseName'>" >> index.html
            done
            echo "</div>" >> index.html
          done
          echo "</body></html>" >> index.html

      - name: Deploy to GitHub Pages
        run: |
          git config user.name "GitHub Actions Bot"
          git config user.email "<email>@users.noreply.github.com"
          git checkout -b gh-pages
          git add ./*.stl **/*.stl ./*.webp **/*.webp index.html
          git commit -m "Update STL files and WebP thumbnails generated by GitHub Actions"
          git push -f origin gh-pages