fix: handle stdio properly

src/Stdio.php

@@ -6,27 +6,55 @@ namespace Nih\CommandBuilder;
 
 use Stringable;
 
-abstract class Stdio
+final class Stdio
 {
-    abstract public function getDescriptorSpec(): array;
+    public const INHERIT = 0;
+    public const PIPE = 1;
+    public const FILE = 2;
+    public const STREAM = 3;
 
-    public static function file(string|Stringable $file, string $mode): self
-    {
-        return new StdioFile((string) $file, $mode);
+    /**
+     * @param null
+     *   |resource
+     *   |array{0: 'file', 1: string, 2: string}
+     *   |array{0: 'pipe',1: string} $descriptorSpec
+     */
+    public function __construct(
+        public readonly int $type,
+        public readonly mixed $descriptorSpec,
+    ) {
     }
 
-    public static function piped(string $mode): self
+    public static function inherit(): self
     {
-        return new StdioPiped($mode);
+        return new self(self::INHERIT, null);
     }
 
-    public static function inherit(): null
+    public static function piped(): self
     {
-        return null;
+        return new self(self::PIPE, ['pipe', 'r']);
     }
 
     public static function null(): self
     {
-        return new StdioFile('/dev/null', 'a+');
+        return self::file('/dev/null', 'a+');
     }
+
+    public static function file(string|Stringable $file, string $mode): self
+    {
+        return new self(self::FILE, ['file', (string) $file, $mode]);
+    }
+
+    /**
+     * @param resource|StreamReadable|StreamWritable $stream
+     */
+    public static function stream($stream): self
+    {
+        if (is_object($stream)) {
+            $stream = $stream->stream;
+        }
+
+        return new self(self::STREAM, $stream);
+    }
+
 }