Enhancement: Run static code analysis with vimeo/psalm

.github/workflows/integrate.yaml

@@ -87,6 +87,32 @@ jobs:
       - name: "Run maglnet/composer-require-checker"
         run: ".phive/composer-require-checker check --config-file=$(pwd)/composer-require-checker.json"
 
+  static-code-analysis:
+    name: "Static Code Analysis"
+
+    runs-on: "ubuntu-latest"
+
+    strategy:
+      matrix:
+        php-version:
+          - "7.4"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v3"
+
+      - name: "Set up PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "${{ matrix.php-version }}"
+
+      - name: "Install dependencies with composer"
+        run: "composer install --ansi --no-progress"
+
+      - name: "Run vimeo/psalm"
+        run: ".phive/psalm --config=psalm.xml --output-format=github --shepherd --show-info=false --stats --threads=4"
+
   tests:
     name: "Tests"
 

.gitignore

@@ -1,3 +1,4 @@
+/.build/
 /vendor/
 /.php-cs-fixer.cache
 /.phpunit.result.cache

.phive/phars.xml

@@ -2,4 +2,5 @@
 <phive xmlns="https://phar.io/phive">
   <phar name="php-cs-fixer" version="^3.8.0" installed="3.8.0" location="./.phive/php-cs-fixer" copy="true"/>
   <phar name="composer-require-checker" version="^3.8.0" installed="3.8.0" location="./.phive/composer-require-checker" copy="true"/>
+  <phar name="psalm" version="^4.22.0" installed="4.22.0" location="./.phive/psalm" copy="true"/>
 </phive>

README.md

@@ -3,6 +3,7 @@
 [![Integrate](https://github.com/friendsoftwig/twigcs/workflows/Integrate/badge.svg)](https://github.com/friendsoftwig/twigcs/actions)
 
 [![Code Coverage](https://codecov.io/github/friendsoftwig/twigcs/branch/main/graph/badge.svg)](https://codecov.io/github/friendsoftwig/twigcs)
+[![Type Coverage](https://shepherd.dev/github/friendsoftwig/twigcs/coverage.svg)](https://shepherd.dev/github/friendsoftwig/twigcs)
 
 The missing checkstyle for twig!
 

psalm-baseline.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<files psalm-version="4.x-dev@" />

psalm.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<psalm
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    cacheDirectory=".build/psalm"
+    errorBaseline="psalm-baseline.xml"
+    errorLevel="1"
+    findUnusedVariablesAndParams="true"
+    resolveFromConfigFile="true"
+    strictBinaryOperands="true"
+>
+    <projectFiles>
+        <directory name="src/" />
+        <ignoreFiles>
+            <directory name="vendor/" />
+        </ignoreFiles>
+    </projectFiles>
+</psalm>