add module preloads before deploy to github pages

.github/workflows/static.yml

@@ -0,0 +1,45 @@
+# Simple workflow for deploying static content to GitHub Pages
+name: Deploy static content to Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["master"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  # Single deploy job since we're just deploying
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+      - name: Build
+        run: ./gen_module_preload.sh
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          # Upload './public' folder
+          path: '.'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

gen_module_preload.sh

@@ -0,0 +1,6 @@
+PRELOADS=""
+for f in `find src -name '*.js'`; do
+  PRELOADS=$PRELOADS"<link rel='modulepreload' href='/$f'>"
+done
+
+sed -i.bak "s#.*PRELOADS_PLACEHOLDER.*#$PRELOADS#" index.html

index.html

@@ -5,6 +5,7 @@
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
     <title>Leporello.js</title>
 
+    <!--PRELOADS_PLACEHOLDER-->
 
     <script src='ace/ace.js'></script>
     <script src='ace/keybinding-vim.js'></script>