updated-packages

vendor/symfony/console/Terminal.php

@@ -15,6 +15,7 @@ class Terminal
 {
     private static $width;
     private static $height;
+    private static $stty;
 
     /**
      * Gets the terminal width.
@@ -54,6 +55,27 @@ class Terminal
         return self::$height ?: 50;
     }
 
+    /**
+     * @internal
+     *
+     * @return bool
+     */
+    public static function hasSttyAvailable()
+    {
+        if (null !== self::$stty) {
+            return self::$stty;
+        }
+
+        // skip check if exec function is disabled
+        if (!\function_exists('exec')) {
+            return false;
+        }
+
+        exec('stty 2>&1', $output, $exitcode);
+
+        return self::$stty = 0 === $exitcode;
+    }
+
     private static function initDimensions()
     {
         if ('\\' === \DIRECTORY_SEPARATOR) {
@@ -62,12 +84,34 @@ class Terminal
                 // or [w, h] from "wxh"
                 self::$width = (int) $matches[1];
                 self::$height = isset($matches[4]) ? (int) $matches[4] : (int) $matches[2];
+            } elseif (!self::hasVt100Support() && self::hasSttyAvailable()) {
+                // only use stty on Windows if the terminal does not support vt100 (e.g. Windows 7 + git-bash)
+                // testing for stty in a Windows 10 vt100-enabled console will implicitly disable vt100 support on STDOUT
+                self::initDimensionsUsingStty();
             } elseif (null !== $dimensions = self::getConsoleMode()) {
                 // extract [w, h] from "wxh"
                 self::$width = (int) $dimensions[0];
                 self::$height = (int) $dimensions[1];
             }
-        } elseif ($sttyString = self::getSttyColumns()) {
+        } else {
+            self::initDimensionsUsingStty();
+        }
+    }
+
+    /**
+     * Returns whether STDOUT has vt100 support (some Windows 10+ configurations).
+     */
+    private static function hasVt100Support(): bool
+    {
+        return \function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(fopen('php://stdout', 'w'));
+    }
+
+    /**
+     * Initializes dimensions using the output of an stty columns line.
+     */
+    private static function initDimensionsUsingStty()
+    {
+        if ($sttyString = self::getSttyColumns()) {
             if (preg_match('/rows.(\d+);.columns.(\d+);/i', $sttyString, $matches)) {
                 // extract [w, h] from "rows h; columns w;"
                 self::$width = (int) $matches[2];
@@ -85,53 +129,46 @@ class Terminal
      *
      * @return int[]|null An array composed of the width and the height or null if it could not be parsed
      */
-    private static function getConsoleMode()
+    private static function getConsoleMode(): ?array
     {
-        if (!\function_exists('proc_open')) {
-            return;
+        $info = self::readFromProcess('mode CON');
+
+        if (null === $info || !preg_match('/--------+\r?\n.+?(\d+)\r?\n.+?(\d+)\r?\n/', $info, $matches)) {
+            return null;
         }
 
-        $descriptorspec = array(
-            1 => array('pipe', 'w'),
-            2 => array('pipe', 'w'),
-        );
-        $process = proc_open('mode CON', $descriptorspec, $pipes, null, null, array('suppress_errors' => true));
-        if (\is_resource($process)) {
-            $info = stream_get_contents($pipes[1]);
-            fclose($pipes[1]);
-            fclose($pipes[2]);
-            proc_close($process);
-
-            if (preg_match('/--------+\r?\n.+?(\d+)\r?\n.+?(\d+)\r?\n/', $info, $matches)) {
-                return array((int) $matches[2], (int) $matches[1]);
-            }
-        }
+        return [(int) $matches[2], (int) $matches[1]];
     }
 
     /**
      * Runs and parses stty -a if it's available, suppressing any error output.
-     *
-     * @return string|null
      */
-    private static function getSttyColumns()
+    private static function getSttyColumns(): ?string
+    {
+        return self::readFromProcess('stty -a | grep columns');
+    }
+
+    private static function readFromProcess(string $command): ?string
     {
         if (!\function_exists('proc_open')) {
-            return;
+            return null;
         }
 
-        $descriptorspec = array(
-            1 => array('pipe', 'w'),
-            2 => array('pipe', 'w'),
-        );
+        $descriptorspec = [
+            1 => ['pipe', 'w'],
+            2 => ['pipe', 'w'],
+        ];
 
-        $process = proc_open('stty -a | grep columns', $descriptorspec, $pipes, null, null, array('suppress_errors' => true));
-        if (\is_resource($process)) {
-            $info = stream_get_contents($pipes[1]);
-            fclose($pipes[1]);
-            fclose($pipes[2]);
-            proc_close($process);
-
-            return $info;
+        $process = proc_open($command, $descriptorspec, $pipes, null, null, ['suppress_errors' => true]);
+        if (!\is_resource($process)) {
+            return null;
         }
+
+        $info = stream_get_contents($pipes[1]);
+        fclose($pipes[1]);
+        fclose($pipes[2]);
+        proc_close($process);
+
+        return $info;
     }
 }