Psalm 2.

psalm.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <psalm
-  errorLevel="3"
+  errorLevel="2"
   findUnusedBaselineEntry="true"
   findUnusedCode="false"
   resolveFromConfigFile="true"

src/Converter/SemverUtil.php

@@ -47,11 +47,7 @@ public static function convertVersionMetadata(string $version): string
     {
         $pattern = self::createPattern('([a-zA-Z]+|(\-|\+)[a-zA-Z]+|(\-|\+)[0-9]+)');
 
-        if ($pattern === '') {
-            return $version;
-        }
-
-        if (preg_match_all($pattern, $version, $matches, PREG_OFFSET_CAPTURE)) {
+        if (preg_match_all($pattern, $version, $matches, PREG_OFFSET_CAPTURE) > 0) {
             [$type, $version, $end] = self::cleanVersion(strtolower($version), $matches);
             [$version, $patchVersion] = self::matchVersion($version, $type);
 
@@ -73,6 +69,8 @@ public static function convertVersionMetadata(string $version): string
      * @param string $pattern The pattern without '/'.
      *
      * @return string The full pattern with '/'.
+     *
+     * @psalm-return non-empty-string
      */
     public static function createPattern(string $pattern): string
     {

src/Foxy.php

@@ -40,40 +40,18 @@
  * Composer plugin.
  *
  * @author François Pluchino <francois.pluchino@gmail.com>
+ *
+ * @psalm-suppress MissingConstructor
  */
 final class Foxy implements PluginInterface, EventSubscriberInterface
 {
-    public const REQUIRED_COMPOSER_VERSION = '^2.0.0';
-
-    /**
-     * @var Config
-     */
-    protected $config;
-
-    /**
-     * @var AssetManagerInterface
-     */
-    protected $assetManager;
-
-    /**
-     * @var AssetFallback
-     */
-    protected $assetFallback;
-
-    /**
-     * @var ComposerFallback
-     */
-    protected $composerFallback;
-
-    /**
-     * @var SolverInterface
-     */
-    protected $solver;
-
-    /**
-     * @var bool
-     */
-    protected $initialized = false;
+    final public const REQUIRED_COMPOSER_VERSION = '^2.0.0';
+    private Config $config;
+    private AssetManagerInterface $assetManager;
+    private AssetFallback $assetFallback;
+    private ComposerFallback $composerFallback;
+    private SolverInterface $solver;
+    private bool $initialized = false;
 
     /**
      * The list of the classes of asset managers.
@@ -89,7 +67,7 @@ final class Foxy implements PluginInterface, EventSubscriberInterface
     /**
      * The default values of config.
      */
-    private static $defaultConfig = [
+    private static array $defaultConfig = [
         'enabled' => true,
         'manager' => null,
         'manager-version' => [

src/Json/JsonFile.php

@@ -21,7 +21,7 @@
 final class JsonFile extends \Composer\Json\JsonFile
 {
     /**
-     * @psalm-var string[]|null
+     * @psalm-var string[]
      */
     private array $arrayKeys = [];
     private int|null $indent = null;
@@ -42,7 +42,7 @@ public function getArrayKeys(): array
             $this->parseOriginalContent();
         }
 
-        return $this->arrayKeys ?? [];
+        return $this->arrayKeys;
     }
 
     /**

src/Json/JsonFormatter.php

@@ -91,7 +91,7 @@ private static function formatInternal(string $json, bool $unescapeUnicode, bool
         $array = \json_decode($json, true);
 
         if ($unescapeUnicode) {
-            \array_walk_recursive($array, function (&$item): void {
+            \array_walk_recursive($array, function (mixed &$item): void {
                 if (\is_string($item)) {
                     $item = \preg_replace_callback(
                         '/\\\\u([0-9a-fA-F]{4})/',
@@ -106,7 +106,7 @@ static function (mixed $match) {
         }
 
         if ($unescapeSlashes) {
-            \array_walk_recursive($array, function (&$item): void {
+            \array_walk_recursive($array, function (mixed &$item): void {
                 if (\is_string($item)) {
                     $item = \str_replace('\\/', '/', $item);
                 }

tests/Converter/SemverConverterTest.php

@@ -14,6 +14,7 @@
 namespace Foxy\Tests\Converter;
 
 use Foxy\Converter\SemverConverter;
+use Foxy\Converter\SemverUtil;
 use Foxy\Converter\VersionConverterInterface;
 use PHPUnit\Framework\TestCase;
 
@@ -100,4 +101,12 @@ public static function getTestVersions(): array
             ['', '*'],
         ];
     }
+
+    public function testConvertVersionMetadataWithEmptyPattern()
+    {
+        $version = '1.0.0';
+        $expected = '1.0.0';
+
+        static::assertSame($expected, SemverUtil::convertVersionMetadata($version));
+    }
 }