Use GitHub Pages Action for generating rdoc page

Author: hsbt

.github/workflows/gh-pages.yml

@@ -0,0 +1,46 @@
+name: Deploy RDoc site to Pages
+
+on:
+  push:
+    branches: [ 'master' ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@92aece5fc9c784ab66851c1e702b1bd5885a51f2 # v1.139.0
+        with:
+          ruby-version: '3.2'
+          bundler-cache: true
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v3
+      - name: Build with RDoc
+        # Outputs to the './_site' directory by default
+        run: bundle exec rake rdoc
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v1

Rakefile

@@ -26,16 +26,7 @@ RDoc::Task.new do |doc|
   doc.main   = "README.rdoc"
   doc.title  = "Rake -- Ruby Make"
   doc.rdoc_files = FileList.new %w[lib MIT-LICENSE doc/**/*.rdoc *.rdoc]
-  doc.rdoc_dir = "html"
-end
-
-task ghpages: :rdoc do
-  %x[git checkout gh-pages]
-  require "fileutils"
-  FileUtils.rm_rf "/tmp/html"
-  FileUtils.mv "html", "/tmp"
-  FileUtils.rm_rf "*"
-  FileUtils.cp_r Dir.glob("/tmp/html/*"), "."
+  doc.rdoc_dir = "_site" # for github pages
 end
 
 task default: :test