Add psalm

.github/workflows/psalm.yml

@@ -0,0 +1,37 @@
+# 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
+
+concurrency:
+  group: psalm-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  static-analysis:
+    runs-on: ubuntu-latest
+
+    name: static-psalm-analysis
+    steps:
+      - name: Checkout
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+      - name: Set up php8.2
+        uses: shivammathur/setup-php@e6f75134d35752277f093989e72e140eaa222f35 # v2
+        with:
+          php-version: 8.2
+          extensions: bz2, ctype, curl, dom, fileinfo, gd, iconv, intl, json, libxml, mbstring, openssl, pcntl, posix, session, simplexml, xmlreader, xmlwriter, zip, zlib, mysql, pdo_mysql, ldap
+          coverage: none
+          ini-file: development
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install dependencies
+        run: composer i
+
+      - name: Run coding standards check
+        run: composer run psalm

composer.json

@@ -15,8 +15,10 @@
 	},
 	"require-dev": {
 		"phpunit/phpunit": "^9",
-		"nextcloud/coding-standard": "^1.0.0",
-		"nextcloud/ocp": "dev-master"
+		"nextcloud/coding-standard": "^1.1",
+		"nextcloud/ocp": "dev-master",
+		"vimeo/psalm": "^5.18",
+		"sabre/dav": "4.5.0"
 	},
 	"require": {
 		"symfony/ldap": "^5.0"
@@ -25,7 +27,10 @@
 		"lint": "find . -name \\*.php -not -path './vendor/*' -not -path './build/*' -print0 | xargs -0 -n1 php -l",
 		"cs:check": "php-cs-fixer fix --dry-run --diff",
 		"cs:fix": "php-cs-fixer fix",
-		"test:unit": "vendor/bin/phpunit -c tests/phpunit.xml"
+		"test:unit": "vendor/bin/phpunit -c tests/phpunit.xml",
+		"psalm": "psalm --no-cache --threads=$(nproc)",
+		"psalm:fix": "psalm --alter --issues=InvalidReturnType,InvalidNullableReturnType,MissingParamType,InvalidFalsableReturnType",
+		"psalm:update-baseline": "psalm --threads=1 --update-baseline"
 	},
 	"autoload-dev": {
 		"psr-4": {