Update nextjs.yml to work with next.js 15 + app router.

Author: digitalnomad91

.github/workflows/nextjs.yml

@@ -1,25 +1,21 @@
-# Sample workflow for building and deploying a Next.js site to GitHub Pages
-#
-# To get started with Next.js see: https://nextjs.org/docs/getting-started
-#
+# Workflow for building and deploying a Next.js site to GitHub Pages
 name: Deploy Next.js site to Pages
 
 on:
-  # Runs on pushes targeting the default branch
+  # Trigger on pushes to the default branch
   push:
     branches: ["main"]
 
-  # Allows you to run this workflow manually from the Actions tab
+  # Allow manual triggering from the Actions tab
   workflow_dispatch:
 
-# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+# Set permissions for deployment
 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.
+# Allow only one deployment at a time
 concurrency:
   group: "pages"
   cancel-in-progress: false
@@ -31,54 +27,28 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Detect package manager
-        id: detect-package-manager
-        run: |
-          if [ -f "${{ github.workspace }}/yarn.lock" ]; then
-            echo "manager=yarn" >> $GITHUB_OUTPUT
-            echo "command=install" >> $GITHUB_OUTPUT
-            echo "runner=yarn" >> $GITHUB_OUTPUT
-            exit 0
-          elif [ -f "${{ github.workspace }}/package.json" ]; then
-            echo "manager=npm" >> $GITHUB_OUTPUT
-            echo "command=ci" >> $GITHUB_OUTPUT
-            echo "runner=npx --no-install" >> $GITHUB_OUTPUT
-            exit 0
-          else
-            echo "Unable to determine package manager"
-            exit 1
-          fi
-      - name: Setup Node
+
+      - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
           node-version: "20"
-          cache: ${{ steps.detect-package-manager.outputs.manager }}
-      - name: Setup Pages
-        uses: actions/configure-pages@v5
-        with:
-          # Automatically inject basePath in your Next.js configuration file and disable
-          # server side image optimization (https://nextjs.org/docs/api-reference/next/image#unoptimized).
-          #
-          # You may remove this line if you want to manage the configuration yourself.
-          static_site_generator: next
-      - name: Restore cache
-        uses: actions/cache@v4
-        with:
-          path: |
-            .next/cache
-          # Generate a new cache whenever packages or source files change.
-          key: ${{ runner.os }}-nextjs-${{ hashFiles('**/package-lock.json', '**/yarn.lock') }}-${{ hashFiles('**.[jt]s', '**.[jt]sx') }}
-          # If source files changed but packages didn't, rebuild from a prior cache.
-          restore-keys: |
-            ${{ runner.os }}-nextjs-${{ hashFiles('**/package-lock.json', '**/yarn.lock') }}-
+          cache: "yarn"
+
       - name: Install dependencies
-        run: ${{ steps.detect-package-manager.outputs.manager }} ${{ steps.detect-package-manager.outputs.command }}
-      - name: Build with Next.js
-        run: ${{ steps.detect-package-manager.outputs.runner }} next build
+        run: yarn install
+
+      - name: Configure Next.js for GitHub Pages
+        run: |
+          echo 'module.exports = { output: "export", basePath: "/<REPOSITORY-NAME>", trailingSlash: true }' > next.config.js
+          cat next.config.js
+
+      - name: Build Next.js site
+        run: yarn next build && yarn next export
+
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with:
-          path: ./out
+          path: out
 
   # Deployment job
   deploy: