Add PHPStan Github Action

.github/workflows/static-code-analysis.yml

@@ -0,0 +1,13 @@
+name: Static code analysis
+
+on: [pull_request]
+
+jobs:
+  static-code-analysis:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Run PHPStan
+        uses: docker://jakzal/phpqa:php7.3-alpine
+        with:
+          args: phpstan analyze

Makefile

@@ -0,0 +1,5 @@
+DIR := ${CURDIR}
+QA_IMAGE := jakzal/phpqa:php7.3-alpine
+
+static:
+	docker run --rm -v $(DIR):/project -w /project $(QA_IMAGE) phpstan analyze

Readme.md

@@ -15,6 +15,14 @@ and loader.
 composer require php-translation/symfony-storage
 ```
 
+### Tests
+
+Static code analysis (uses PHPStan) by running:
+
+```
+make static
+```
+
 ### Documentation
 
 Read our documentation at [http://php-translation.readthedocs.io](http://php-translation.readthedocs.io/en/latest/).

phpstan-baseline.neon

@@ -0,0 +1,22 @@
+parameters:
+	ignoreErrors:
+		-
+			message: "#^Method Translation\\\\SymfonyStorage\\\\FileStorage\\:\\:writeCatalogue\\(\\) has no return typehint specified\\.$#"
+			count: 1
+			path: src/FileStorage.php
+
+		-
+			message: "#^Method Translation\\\\SymfonyStorage\\\\FileStorage\\:\\:writeCatalogue\\(\\) has parameter \\$locale with no typehint specified\\.$#"
+			count: 1
+			path: src/FileStorage.php
+
+		-
+			message: "#^Parameter \\#1 \\$catalogue of method Symfony\\\\Component\\\\Translation\\\\Writer\\\\TranslationWriterInterface\\:\\:write\\(\\) expects Symfony\\\\Component\\\\Translation\\\\MessageCatalogue, Symfony\\\\Component\\\\Translation\\\\MessageCatalogueInterface given\\.$#"
+			count: 2
+			path: src/FileStorage.php
+
+		-
+			message: "#^Method Translation\\\\SymfonyStorage\\\\FileStorage\\:\\:loadCatalogue\\(\\) has no return typehint specified\\.$#"
+			count: 1
+			path: src/FileStorage.php
+

phpstan.neon.dist

@@ -0,0 +1,12 @@
+includes:
+    - phpstan-baseline.neon
+
+parameters:
+    level: max
+    inferPrivatePropertyTypeFromConstructor: true
+    checkMissingIterableValueType: false
+    paths:
+        - src
+    excludes_analyse:
+        - vendor
+        - Tests