Check for and require tput command to be available

The tput command isn't available by default in the Alpine Linux official
PHP docker images and this throws an InvalidArgumentException for
truncation length.

This commit replaces tput in favour of using stty on *nix OSes and mode
on Windows.

src/Terminal.php

@@ -2,6 +2,10 @@
 
 namespace Laravel\Prompts;
 
+use RuntimeException;
+
+use const PHP_OS_FAMILY;
+
 class Terminal
 {
     /**
@@ -62,15 +66,15 @@ public function restoreTty(): void
      */
     public function cols(): int
     {
-        return $this->cols ??= (int) shell_exec('tput cols 2>/dev/null');
+        return $this->cols ??= $this->terminalSize()['cols'];
     }
 
     /**
      * Get the number of lines in the terminal.
      */
     public function lines(): int
     {
-        return $this->lines ??= (int) shell_exec('tput lines 2>/dev/null');
+        return $this->lines ??= $this->terminalSize()['lines'];
     }
 
     /**
@@ -80,4 +84,40 @@ public function exit(): void
     {
         exit(1);
     }
+
+    /**
+     * Get the terminal lines and columns
+     * from stty (*nix) or mode (windows).
+     *
+     * @return array<string, int>
+     * @throws RuntimeException
+     */
+    protected function terminalSize(): array
+    {
+        if (PHP_OS_FAMILY === 'Windows') {
+            if (!is_string($mode = shell_exec('mode CON'))) {
+                throw new RuntimeException('Unable to determine terminal size.');
+            }
+
+            $matches = [];
+            preg_match('/Lines: \s+(\d+)\n.+?Columns:\s*(\d+)/i', $mode, $matches);
+
+            if (count($matches) !== 3) {
+                throw new RuntimeException('Unable to determine terminal size.');
+            }
+
+            [$lines, $cols] = [$matches[1], $matches[2]];
+        } else {
+            if (!is_string($stty = shell_exec('stty size 2>/dev/null'))) {
+                throw new RuntimeException('Unable to determine terminal size.');
+            }
+
+            [$lines, $cols] = explode(' ', rtrim($stty));
+        }
+
+        return [
+            'lines' => (int)$lines,
+            'cols' => (int)$cols,
+        ];
+    }
 }