added Console::detectColors()

supports
- NO_COLOR https://no-color.org
- sapi_windows_vt100_support
- stream_isatty

src/CommandLine/Console.php

@@ -21,8 +21,7 @@ class Console
 
 	public function __construct()
 	{
-		$this->useColors = PHP_SAPI === 'cli' && ((function_exists('posix_isatty') && posix_isatty(STDOUT))
-			|| getenv('ConEmuANSI') === 'ON' || getenv('ANSICON') !== false || getenv('term') === 'xterm-256color');
+		$this->useColors = self::detectColors();
 	}
 
 
@@ -51,4 +50,19 @@ public function color(?string $color, string $s = null): string
 		}
 		return (string) $s;
 	}
+
+
+	public static function detectColors(): bool
+	{
+		return (PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg')
+			&& stream_isatty(STDOUT)
+			&& getenv('NO_COLOR') === false // https://no-color.org
+			&& (defined('PHP_WINDOWS_VERSION_BUILD')
+				? (function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(STDOUT))
+					|| getenv('ConEmuANSI') === 'ON' // ConEmu
+					|| getenv('ANSICON') !== false // ANSICON
+					|| getenv('term') === 'xterm' // MSYS
+					|| getenv('term') === 'xterm-256color' // MSYS
+				: true);
+	}
 }