use pnpm on github action to deploy site

Author: pacu

.github/workflows/nextjs.yml

@@ -1,83 +1,65 @@
-# 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
-#
 name: Deploy Next.js site to Pages
 
 on:
-  # Runs on pushes targeting the default branch
   push:
     branches: ["main"]
-
-  # 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:
-  # Build job
   build:
     runs-on: ubuntu-latest
     env:
       NEXT_TELEMETRY_DISABLED: 1
     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
+
+      # Setup pnpm (v10) and Node.js
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
           node-version: "20"
-          cache: ${{ steps.detect-package-manager.outputs.manager }}
+          cache: "pnpm"
+
       - name: Setup Pages
         uses: actions/configure-pages@v5
-        
-      - name: Restore cache
+
+      # Cache Next.js build cache (separate from pnpm cache above)
+      - name: Restore Next.js 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.
+          key: ${{ runner.os }}-nextjs-${{ hashFiles('**/pnpm-lock.yaml') }}-${{ hashFiles('**/*.[jt]s', '**/*.[jt]sx', '**/*.mdx') }}
           restore-keys: |
-            ${{ runner.os }}-nextjs-${{ hashFiles('**/package-lock.json', '**/yarn.lock') }}-
+            ${{ runner.os }}-nextjs-${{ hashFiles('**/pnpm-lock.yaml') }}-
+
       - name: Install dependencies
-        run: ${{ steps.detect-package-manager.outputs.manager }} ${{ steps.detect-package-manager.outputs.command }}
+        run: pnpm install --frozen-lockfile
+
       - name: Build with Next.js
-        run: ${{ steps.detect-package-manager.outputs.runner }} next build
+        run: |
+          pnpm run build
+          pnpm exec next export
+
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with:
           path: ./out
 
-  # Deployment job
   deploy:
     environment:
       name: github-pages