ci: psalm workflow

.github/workflows/lint-php.yaml

@@ -1,5 +1,5 @@
 ---
-name: Lint
+name: lint
 on:
   - push
   - pull_request

.github/workflows/psalm.yaml

@@ -0,0 +1,36 @@
+name: pslam
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  pslam:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout server
+        uses: actions/checkout@v3
+        with:
+          submodules: true
+          repository: nextcloud/server
+          ref: stable27
+
+      - name: Checkout the app
+        uses: actions/checkout@v3
+        with:
+          path: apps/memories
+
+      - name: Set up php ${{ matrix.php-versions }}
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.1
+          tools: phpunit
+          extensions: mbstring, iconv, fileinfo, intl
+          coverage: none
+
+      - name: Run tests
+        run: |
+          cd apps/memories
+          make install-tools
+          make psalm

Makefile

@@ -9,6 +9,7 @@ exiftool:
 install-tools:
 	mkdir -p tools
 	composer require --dev --working-dir=tools friendsofphp/php-cs-fixer vimeo/psalm
+	composer install
 
 php-lint:
 	tools/vendor/bin/php-cs-fixer fix lib

lib/ClustersBackend/Backend.php

@@ -69,7 +69,7 @@ abstract class Backend
     /**
      * Get a cluster ID for the given cluster.
      *
-     * @return string|int
+     * @return int|string
      */
     abstract public static function getClusterId(array $cluster);