Update to use pnpm

Author: mikera

.github/workflows/nextjs.yml

@@ -34,7 +34,12 @@ jobs:
       - name: Detect package manager
         id: detect-package-manager
         run: |
-          if [ -f "${{ github.workspace }}/yarn.lock" ]; then
+          if [ -f "${{ github.workspace }}/pnpm-lock.yaml" ]; then
+            echo "manager=pnpm" >> $GITHUB_OUTPUT
+            echo "command=install" >> $GITHUB_OUTPUT
+            echo "runner=pnpm" >> $GITHUB_OUTPUT
+            exit 0
+          elif [ -f "${{ github.workspace }}/yarn.lock" ]; then
             echo "manager=yarn" >> $GITHUB_OUTPUT
             echo "command=install" >> $GITHUB_OUTPUT
             echo "runner=yarn" >> $GITHUB_OUTPUT
@@ -53,6 +58,11 @@ jobs:
         with:
           node-version: "20"
           cache: ${{ steps.detect-package-manager.outputs.manager }}
+      - name: Install pnpm
+        if: ${{ steps.detect-package-manager.outputs.manager == 'pnpm' }}
+        uses: pnpm/action-setup@v2
+        with:
+          version: '10.11.0'
       - name: Setup Pages
         uses: actions/configure-pages@v5
         with:
@@ -67,10 +77,10 @@ jobs:
           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') }}
+          key: ${{ runner.os }}-nextjs-${{ hashFiles('**/pnpm-lock.yaml') }}-${{ 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') }}-
+            ${{ runner.os }}-nextjs-${{ hashFiles('**/pnpm-lock.yaml') }}-
       - name: Install dependencies
         run: ${{ steps.detect-package-manager.outputs.manager }} ${{ steps.detect-package-manager.outputs.command }}
       - name: Build with Next.js