Skip the launcher when using Windows.

composer.json

@@ -40,7 +40,8 @@
     "symfony/console": "2.7.*",
     "symfony/event-dispatcher": "2.7.*",
     "symfony/config": "~2.2",
-    "pear/console_table": "~1.3.0"
+    "pear/console_table": "~1.3.0",
+    "webmozart/path-util": "~2"
   },
   "require-dev": {
     "phpunit/phpunit": "4.*",

docs/install-alternative.md

@@ -68,7 +68,7 @@ cd /opt/drush-9.x
 
 Windows
 ------------
-Drush on Windows is not recommended, since Drush's test suite is not running there ([help wanted](https://github.com/drush-ops/drush/issues/1612)).
+Drush on Windows is experimental, since Drush's test suite is not running there ([help wanted](https://github.com/drush-ops/drush/issues/1612)).
 
 - [Acquia Dev Desktop](https://www.acquia.com/downloads) is excellent, and includes Drush. See the terminal icon after setting up a web site.
 - Or consider running Linux/OSX via Virtualbox. [Drupal VM](http://www.drupalvm.com/) and [Vlad](https://github.com/hashbangcode/vlad) are popular.

includes/environment.inc

@@ -506,16 +506,6 @@ function drush_build_drush_command($drush_path = NULL, $php = NULL, $os = NULL,
   return trim($prefix . ' ' . drush_escapeshellarg($drush_path, $os) . $additional_options);
 }
 
-/**
- * Check if the operating system is Windows.
- * This will return TRUE under DOS, Powershell
- * Cygwin and MSYSGIT shells, so test for the
- * Windows variant FIRST if you care.
- */
-function drush_is_windows($os = NULL) {
-  return _drush_test_os($os, array("WIN","CYGWIN","CWRSYNC","MINGW"));
-}
-
 /**
  * Check if the operating system is Winodws
  * running some variant of cygwin -- either

includes/exec.inc

@@ -322,40 +322,6 @@ function drush_wrap_with_quotes($arg) {
  * Use raw to get an unquoted version of the escaped arg.
  * Notice that you can't add quotes later until you know the platform.
  */
-function drush_escapeshellarg($arg, $os = NULL, $raw = FALSE) {
-  // Short-circuit escaping for simple params (keep stuff readable)
-  if (preg_match('|^[a-zA-Z0-9.:/_-]*$|', $arg)) {
-    return $arg;
-  }
-  elseif (drush_is_windows($os)) {
-    return _drush_escapeshellarg_windows($arg, $raw);
-  }
-  else {
-    return _drush_escapeshellarg_linux($arg, $raw);
-  }
-}
-
-/**
- * Windows version of escapeshellarg().
- */
-function _drush_escapeshellarg_windows($arg, $raw = FALSE) {
-  // Double up existing backslashes
-  $arg = preg_replace('/\\\/', '\\\\\\\\', $arg);
-
-  // Double up double quotes
-  $arg = preg_replace('/"/', '""', $arg);
-
-  // Double up percents.
-  $arg = preg_replace('/%/', '%%', $arg);
-
-  // Only wrap with quotes when needed.
-  if(!$raw) {
-    // Add surrounding quotes.
-    $arg = '"' . $arg . '"';
-  }
-
-  return $arg;
-}
 
 /**
  * Stores output for the most recent shell command.

includes/filesystem.inc

@@ -4,6 +4,7 @@
  * @file
  * Filesystem utilities.
  */
+use Webmozart\PathUtil\Path;
 
 /**
  * @defgroup filesystemfunctions Filesystem convenience functions.
@@ -738,9 +739,8 @@ function drush_file_append_data($file, $data) {
  * the other.
  */
 function drush_is_nested_directory($base_dir, $test_is_nested) {
-  // Ensure there is always exactly one '/' at the end of $base_dir
-  $base_dir = rtrim($base_dir, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
-  return substr($test_is_nested, 0, strlen($base_dir)) == $base_dir;
+  $common = Path::getLongestCommonBasePath([$test_is_nested, $base_dir]);
+  return $common == Path::canonicalize($base_dir);
 }
 
 /**

includes/startup.inc

@@ -125,6 +125,26 @@ function find_wrapper_or_launcher_at_location($location) {
   return "";
 }
 
+/**
+ * Determine whether current OS is a Windows variant.
+ */
+function drush_is_windows() {
+  return strtoupper(substr(PHP_OS, 0, 3)) === 'WIN';
+}
+
+function drush_escapeshellarg($arg, $os = NULL, $raw = FALSE) {
+  // Short-circuit escaping for simple params (keep stuff readable)
+  if (preg_match('|^[a-zA-Z0-9.:/_-]*$|', $arg)) {
+    return $arg;
+  }
+  elseif (drush_is_windows($os)) {
+    return _drush_escapeshellarg_windows($arg, $raw);
+  }
+  else {
+    return _drush_escapeshellarg_linux($arg, $raw);
+  }
+}
+
 /**
  * Linux version of escapeshellarg().
  *
@@ -157,6 +177,28 @@ function _drush_escapeshellarg_linux($arg, $raw = FALSE) {
   return $arg;
 }
 
+/**
+ * Windows version of escapeshellarg().
+ */
+function _drush_escapeshellarg_windows($arg, $raw = FALSE) {
+  // Double up existing backslashes
+  $arg = preg_replace('/\\\/', '\\\\\\\\', $arg);
+
+  // Double up double quotes
+  $arg = preg_replace('/"/', '""', $arg);
+
+  // Double up percents.
+  $arg = preg_replace('/%/', '%%', $arg);
+
+  // Only wrap with quotes when needed.
+  if(!$raw) {
+    // Add surrounding quotes.
+    $arg = '"' . $arg . '"';
+  }
+
+  return $arg;
+}
+
 /**
  * drush_startup is called once, by the Drush "finder"
  * script -- the "drush" script at the Drush root.
@@ -313,20 +355,26 @@ function drush_startup($argv) {
     }
   }
 
-  // A Phar can't use the Bash niceties of the Launcher so just proceed to drush_main().
-  if (class_exists('Phar') && Phar::running()) {
+  // Didn't find any site-local Drush, or @use'd Drush.
+  // If a Phar finds itself (https://github.com/drush-ops/drush/pull/2246), skip the Bash niceties of the launcher and proceed to drush_main().
+  if (!empty($found_script) && class_exists('Phar')  && $found_script == Phar::running(FALSE)) {
     drush_run_main($DEBUG, $sep, "Phar detected. Proceeding to drush_main().");
   }
 
   // Didn't find any site-local Drush, or @use'd Drush, or Phar.
   // There should be a drush.launcher in same directory as this script.
   if (empty($found_script)) {
     $found_script = dirname(__DIR__) . "{$sep}drush.launcher";
-    // Phar clause added due to https://github.com/drush-ops/drush/pull/2246
-    if (!is_executable($found_script)) {
-      // Can't execute the found launcher, so proceed with the current drush,
-      // bypassing the Bash niceties of the launcher.
-      drush_run_main($DEBUG, $sep, 'No executable launcher found. Proceeding to drush_main()."');
+  }
+
+  if (drush_is_windows()) {
+    // Sometimes we found launcher in /bin, and sometimes not. Adjust accordingly.
+    if (strpos($found_script, 'bin')) {
+      $found_script = dirname($found_script). $sep. 'drush.php.bat';
+    }
+    else {
+      array_unshift($arguments, dirname($found_script). $sep. 'drush.php');
+      $found_script = 'php';
     }
   }
 
@@ -370,7 +418,7 @@ function drush_startup($argv) {
     exit(1);
   }
   else {
-    $escaped_args = array_map(function($item) { return _drush_escapeshellarg_linux($item); }, $arguments);
+    $escaped_args = array_map(function($item) { return drush_escapeshellarg($item); }, $arguments);
     $process = proc_open($found_script . ' ' . implode(' ', $escaped_args), array(0 => STDIN, 1 => STDOUT, 2 => STDERR), $pipes);
     $proc_status = proc_get_status($process);
     $exit_code = proc_close($process);

lib/Drush/Boot/DrupalBoot.php

@@ -285,7 +285,7 @@ function bootstrap_drupal_root_validate() {
       return drush_set_error('DRUSH_DRUPAL_VERSION_UNSUPPORTED', dt('Drush !drush_version does not support Drupal !major_version.', array('!drush_version' => DRUSH_VERSION, '!major_version' => $major_version)));
     }
 
-    drush_bootstrap_value('drupal_root', realpath($drupal_root));
+    drush_bootstrap_value('drupal_root', $drupal_root);
     define('DRUSH_DRUPAL_SIGNATURE', $signature);
 
     return TRUE;