Automate github pages workflow

.github/workflows/godot-export.yml

@@ -29,7 +29,7 @@ jobs:
           unzip -oqq "${GITHUB_WORKSPACE}/assets.zip"
           rm -f "${GITHUB_WORKSPACE}/assets.zip"
 
-      - name: export game
+      - name: Export Godot game
         # Use version 1.2.0 (see releases for all versions)
         uses: firebelley/[email protected]
         with:
@@ -45,6 +45,30 @@ jobs:
           godot_template_version: 3.2.1.stable
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      # checkout gh-pages branch in a different directory
+      - name: Setup github pages
+        uses: actions/checkout@v2
+        with:
+          path: github_pages
+          ref: gh-pages
+
+      # copy generated web export (2nd export preset)
+      - name: Copy web export
+        run: |
+          cp -f /home/runner/.local/share/godot/builds/2/* ${GITHUB_WORKSPACE}/github_pages
+          ls -lha ${GITHUB_WORKSPACE}
+          ls -lha ${GITHUB_WORKSPACE}/github_pages
+
+      # deploy directory to github pages
+      - name: Deploy github pages
+        if: success()
+        uses: crazy-max/ghaction-github-pages@v1
+        with:
+          target_branch: gh-pages
+          build_dir: github_pages
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         # deploy to github pages
       # - name: Deploy to github pages
       #   run: |