Deprecate Checkstyle report format, drop Checkstyle output formatter

build/target-repository/README.md

@@ -214,12 +214,11 @@ We currently provide formatters for:
 
 - `console`:  Human-oriented printing à la PHP CS Fixer.
 - `json`:  A custom JSON blob for arbitrary tooling.
-- `checkstyle`: Useful for Github Action Reports.
 
 You can use the output format option as below
 
 ```bash
-vendor/bin/ecs --output-format=checkstyle
+vendor/bin/ecs --output-format=json
 ```
 
 <br>

build/target-repository/composer.json

@@ -18,8 +18,5 @@
         "symplify/coding-standard": "<13.0",
         "phpcsstandards/php_codesniffer": "<4.0.4",
         "friendsofphp/php-cs-fixer": "<3.95.20"
-    },
-    "suggest": {
-        "ext-dom": "Needed to support checkstyle output format in class CheckstyleOutputFormatter"
     }
 }

src/Console/Output/OutputFormatterCollector.php

@@ -18,6 +18,7 @@ final class OutputFormatterCollector
     private const array REMOVED_FORMATS = [
         'junit' => ConsoleOutputFormatter::NAME,
         'gitlab' => ConsoleOutputFormatter::NAME,
+        'checkstyle' => ConsoleOutputFormatter::NAME,
     ];
 
     /**

tests/Console/Output/OutputFormatterCollectorTest.php

@@ -4,7 +4,6 @@
 
 namespace Symplify\EasyCodingStandard\Tests\Console\Output;
 
-use Symplify\EasyCodingStandard\Console\Output\CheckstyleOutputFormatter;
 use Symplify\EasyCodingStandard\Console\Output\ConsoleOutputFormatter;
 use Symplify\EasyCodingStandard\Console\Output\JsonOutputFormatter;
 use Symplify\EasyCodingStandard\Console\Output\OutputFormatterCollector;
@@ -31,10 +30,6 @@ public function test(): void
             JsonOutputFormatter::class,
             $this->outputFormatterCollector->getByName(JsonOutputFormatter::getName())
         );
-        $this->assertInstanceOf(
-            CheckstyleOutputFormatter::class,
-            $this->outputFormatterCollector->getByName(CheckstyleOutputFormatter::getName())
-        );
     }
 
     public function testRemovedJUnitFormatFallsBackToConsole(): void
@@ -52,4 +47,12 @@ public function testRemovedGitlabFormatFallsBackToConsole(): void
             $this->outputFormatterCollector->getByName('gitlab')
         );
     }
+
+    public function testRemovedCheckstyleFormatFallsBackToConsole(): void
+    {
+        $this->assertInstanceOf(
+            ConsoleOutputFormatter::class,
+            $this->outputFormatterCollector->getByName('checkstyle')
+        );
+    }
 }