ci: Add node build job

.github/workflows/node.yml

@@ -0,0 +1,99 @@
+# This workflow is provided via the organization template repository
+#
+# https://github.com/nextcloud/.github
+# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+
+name: Node
+
+on: pull_request
+
+permissions:
+  contents: read
+
+concurrency:
+  group: node-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  changes:
+    runs-on: ubuntu-latest
+
+    outputs:
+      src: ${{ steps.changes.outputs.src}}
+
+    steps:
+      - uses: dorny/paths-filter@4512585405083f25c027a35db413c2b3b9006d50 # v2.11.1
+        id: changes
+        continue-on-error: true
+        with:
+          filters: |
+            src:
+              - '.github/workflows/**'
+              - 'src/**'
+              - 'appinfo/info.xml'
+              - 'package.json'
+              - 'package-lock.json'
+              - 'tsconfig.json'
+              - '**.js'
+              - '**.ts'
+              - '**.vue'
+
+  build:
+    runs-on: ubuntu-latest
+
+    needs: changes
+    if: needs.changes.outputs.src != 'false'
+
+    name: NPM build
+    steps:
+      - name: Checkout
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+      - name: Read package.json node and npm engines version
+        uses: skjnldsv/read-package-engines-version-actions@8205673bab74a63eb9b8093402fd9e0e018663a1 # v2.2
+        id: versions
+        with:
+          fallbackNode: '^20'
+          fallbackNpm: '^9'
+
+      - name: Set up node ${{ steps.versions.outputs.nodeVersion }}
+        uses: actions/setup-node@8f152de45cc393bb48ce5d89d36b731f54556e65 # v3
+        with:
+          node-version: ${{ steps.versions.outputs.nodeVersion }}
+
+      - name: Set up npm ${{ steps.versions.outputs.npmVersion }}
+        run: npm i -g npm@"${{ steps.versions.outputs.npmVersion }}"
+
+      - name: Install dependencies & build
+        env:
+          CYPRESS_INSTALL_BINARY: 0
+          PUPPETEER_SKIP_DOWNLOAD: true
+        run: |
+          npm ci
+          npm run build --if-present
+
+      - name: Check webpack build changes
+        run: |
+          bash -c "[[ ! \"`git status --porcelain `\" ]] || (echo 'Please recompile and commit the assets, see the section \"Show changes on failure\" for details' && exit 1)"
+
+      - name: Show changes on failure
+        if: failure()
+        run: |
+          git status
+          git --no-pager diff
+          exit 1 # make it red to grab attention
+
+  summary:
+    permissions:
+      contents: none
+    runs-on: ubuntu-latest
+    needs: [changes, build]
+
+    if: always()
+
+    # This is the summary, we just avoid to rename it so that branch protection rules still match
+    name: node
+
+    steps:
+      - name: Summary status
+        run: if ${{ needs.changes.outputs.src != 'false' && needs.build.result != 'success' }}; then exit 1; fi