add baseline for phpstan and github action

Author: Grotax

.github/workflows/phpstan-baseline.yml

@@ -0,0 +1,33 @@
+name: PHPStan Baseline Check
+
+on:
+  pull_request:
+    branches: [ main, master ]
+    paths:
+      - 'src/**/*.php'
+
+jobs:
+  phpstan:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: '8.1'
+        extensions: mbstring, intl
+        
+    - name: Install dependencies
+      run: composer install --prefer-dist --no-progress --optimize-autoloader
+      
+    - name: Generate PHPStan baseline (if not exists)
+      run: |
+        if [ ! -f phpstan-baseline.neon ]; then
+          vendor/bin/phpstan analyse --generate-baseline
+        fi
+        
+    - name: Run PHPStan with baseline
+      run: vendor/bin/phpstan analyse --error-format=github

phpstan-baseline.neon.dist

@@ -0,0 +1,25 @@
+parameters:
+	ignoreErrors:
+		-
+			message: '#^Call to an undefined method FeedIo\\Feed\\ItemInterface\:\:setHostInContent\(\)\.$#'
+			identifier: method.notFound
+			count: 1
+			path: src/FeedIo/Feed.php
+
+		-
+			message: '#^Offset float on list in isset\(\) does not exist\.$#'
+			identifier: isset.offset
+			count: 1
+			path: src/FeedIo/Reader/Result/UpdateStats.php
+
+		-
+			message: '#^Call to an undefined method FeedIo\\Feed\\NodeInterface\:\:getHostFromLink\(\)\.$#'
+			identifier: method.notFound
+			count: 1
+			path: src/FeedIo/Rule/Link.php
+
+		-
+			message: '#^PHPDoc tag @var with type FeedIo\\Reader\\FixerAbstract is not subtype of native type FeedIo\\Reader\\Fixer\\HttpLastModified\|FeedIo\\Reader\\Fixer\\PublicId\.$#'
+			identifier: varTag.nativeType
+			count: 1
+			path: src/FeedIo/Specification.php

phpstan.neon.dist

@@ -1,3 +1,6 @@
+includes:
+	- phpstan-baseline.neon.dist
+
 parameters:
     errorFormat: table
     level: 5