only run workflows when they are actually needed

Signed-off-by: Simon L <szaimen@e.mail.de>

.github/workflows/psalm.yml

@@ -0,0 +1,49 @@
+# 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: Static analysis
+
+on:
+  pull_request:
+    paths:
+      - 'php/**'
+  push:
+    branches:
+      - main
+    paths:
+      - 'php/**'
+
+concurrency:
+  group: psalm-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  static-analysis:
+    runs-on: ubuntu-latest
+
+    name: Nextcloud
+    steps:
+      - name: Checkout
+        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
+
+      - name: Set up php
+        uses: shivammathur/setup-php@c5fc0d8281aba02c7fda07d3a70cc5371548067d # v2
+        with:
+          php-version: 8.2
+          extensions: apcu
+          coverage: none
+          ini-file: development
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install dependencies
+        run: |
+          set -x
+          cd php
+          composer global require vimeo/psalm --prefer-dist --no-progress --dev
+          composer install
+
+      - name: Run coding standards check
+        run: composer run psalm