add workflow action to build docs

.github/workflows/update-docs.yaml

@@ -0,0 +1,51 @@
+name: Update Docs
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  update-docs:
+    runs-on: ubuntu-latest
+
+    permissions:
+        # Give the default GITHUB_TOKEN write permission to commit and push the
+        # added or changed files to the repository.
+        contents: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '16'  # Update based on your project's requirements
+
+      - name: Build
+        run: |
+          cd docs; 
+          npm install 
+          cd ..
+          node docs/build.js
+
+      - name: Deploy to Docs Branch
+        run: |
+          # Configure Git
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+
+          # Preserve built files
+          mv build ..
+
+          # Switch to the docs branch
+          git checkout --orphan docs
+          git rm -rf . || true
+          cp -r ../build/* .
+          rm -rf ../build
+
+          # Commit and push changes
+          git add .
+          git commit -m "Update docs on $(date)"
+          git push --force origin docs

.gitignore

@@ -2,3 +2,4 @@ bin
 obj
 aoc-crypt.key
 docs/node_modules
+build

docs/build.js

@@ -109,7 +109,7 @@ function generateDayPicker(year, day, yearToDays) {
     return res;
 }
 const template = loadTemplate('docs/template.html');
-
+const redirectTemplate = loadTemplate('docs/redirect_template.html')
 
 const yearToDays = {}; 
 for (const { year, day } of findReadmes('.')) {
@@ -123,10 +123,17 @@ for(const year of Object.keys(yearToDays)){
     yearToDays[year] = yearToDays[year].sort((a,b) => a-b);
 }
 
-
+const lastYear = Math.max(...Object.keys(yearToDays))
+const lastDay = Math.max(...yearToDays[lastYear]);
 
 copyDirectory('docs/static', 'build');
 
+const filledRedirectTemplate = fillTemplate(redirectTemplate, {
+    'default-page-url': `https://aoc.csokavar.hu/${lastYear}/${lastDay}/`,
+});
+
+fs.writeFileSync(path.join('build', 'index.html'), filledRedirectTemplate);
+
 // Iterate over readme.md files and print filled templates
 for (const { year, day, name, notes, code, illustration } of findReadmes('.')) {
     const filledHtml = fillTemplate(template, {
@@ -143,3 +150,4 @@ for (const { year, day, name, notes, code, illustration } of findReadmes('.')) {
     fs.writeFileSync(path.join(dst, 'index.html'), filledHtml);
     fs.copyFileSync(illustration, path.join(dst, 'illustration.jpeg'));
 }
+

docs/static/index.html → docs/redirect_template.html

@@ -4,5 +4,7 @@
     const url = new URL(window.location.href);
     if (url.search.match(/^\?(\d{4})\/\d{1,2}/)) {
         window.location = url.search.substring(1);
-    }
+    } else {
+        window.location = '{{default-page-url}}';
+    } 
 </script>