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diff --git a/production/example_apps/shared_calendar/src/Console/Installer.php b/production/example_apps/shared_calendar/src/Console/Installer.php
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+++ b/production/example_apps/shared_calendar/src/Console/Installer.php
@@ -0,0 +1,195 @@
+<?php
+/**
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * For full copyright and license information, please see the LICENSE.txt
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link      http://cakephp.org CakePHP(tm) Project
+ * @since     3.0.0
+ * @license   http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+namespace App\Console;
+
+use Cake\Utility\Security;
+use Composer\Script\Event;
+use Exception;
+
+/**
+ * Provides installation hooks for when this application is installed via
+ * composer. Customize this class to suit your needs.
+ */
+class Installer
+{
+
+    /**
+     * Does some routine installation tasks so people don't have to.
+     *
+     * @param \Composer\Script\Event $event The composer event object.
+     * @throws \Exception Exception raised by validator.
+     * @return void
+     */
+    public static function postInstall(Event $event)
+    {
+        $io = $event->getIO();
+
+        $rootDir = dirname(dirname(__DIR__));
+
+        static::createAppConfig($rootDir, $io);
+        static::createWritableDirectories($rootDir, $io);
+
+        // ask if the permissions should be changed
+        if ($io->isInteractive()) {
+            $validator = function ($arg) {
+                if (in_array($arg, ['Y', 'y', 'N', 'n'])) {
+                    return $arg;
+                }
+                throw new Exception('This is not a valid answer. Please choose Y or n.');
+            };
+            $setFolderPermissions = $io->askAndValidate(
+                '<info>Set Folder Permissions ? (Default to Y)</info> [<comment>Y,n</comment>]? ',
+                $validator,
+                10,
+                'Y'
+            );
+
+            if (in_array($setFolderPermissions, ['Y', 'y'])) {
+                static::setFolderPermissions($rootDir, $io);
+            }
+        } else {
+            static::setFolderPermissions($rootDir, $io);
+        }
+
+        static::setSecuritySalt($rootDir, $io);
+
+        if (class_exists('\Cake\Codeception\Console\Installer')) {
+            \Cake\Codeception\Console\Installer::customizeCodeceptionBinary($event);
+        }
+    }
+
+    /**
+     * Create the config/app.php file if it does not exist.
+     *
+     * @param string $dir The application's root directory.
+     * @param \Composer\IO\IOInterface $io IO interface to write to console.
+     * @return void
+     */
+    public static function createAppConfig($dir, $io)
+    {
+        $appConfig = $dir . '/config/app.php';
+        $defaultConfig = $dir . '/config/app.default.php';
+        if (!file_exists($appConfig)) {
+            copy($defaultConfig, $appConfig);
+            $io->write('Created `config/app.php` file');
+        }
+    }
+
+    /**
+     * Create the `logs` and `tmp` directories.
+     *
+     * @param string $dir The application's root directory.
+     * @param \Composer\IO\IOInterface $io IO interface to write to console.
+     * @return void
+     */
+    public static function createWritableDirectories($dir, $io)
+    {
+        $paths = [
+            'logs',
+            'tmp',
+            'tmp/cache',
+            'tmp/cache/models',
+            'tmp/cache/persistent',
+            'tmp/cache/views',
+            'tmp/sessions',
+            'tmp/tests'
+        ];
+
+        foreach ($paths as $path) {
+            $path = $dir . '/' . $path;
+            if (!file_exists($path)) {
+                mkdir($path);
+                $io->write('Created `' . $path . '` directory');
+            }
+        }
+    }
+
+    /**
+     * Set globally writable permissions on the "tmp" and "logs" directory.
+     *
+     * This is not the most secure default, but it gets people up and running quickly.
+     *
+     * @param string $dir The application's root directory.
+     * @param \Composer\IO\IOInterface $io IO interface to write to console.
+     * @return void
+     */
+    public static function setFolderPermissions($dir, $io)
+    {
+        // Change the permissions on a path and output the results.
+        $changePerms = function ($path, $perms, $io) {
+            // Get permission bits from stat(2) result.
+            $currentPerms = fileperms($path) & 0777;
+            if (($currentPerms & $perms) == $perms) {
+                return;
+            }
+
+            $res = chmod($path, $currentPerms | $perms);
+            if ($res) {
+                $io->write('Permissions set on ' . $path);
+            } else {
+                $io->write('Failed to set permissions on ' . $path);
+            }
+        };
+
+        $walker = function ($dir, $perms, $io) use (&$walker, $changePerms) {
+            $files = array_diff(scandir($dir), ['.', '..']);
+            foreach ($files as $file) {
+                $path = $dir . '/' . $file;
+
+                if (!is_dir($path)) {
+                    continue;
+                }
+
+                $changePerms($path, $perms, $io);
+                $walker($path, $perms, $io);
+            }
+        };
+
+        $worldWritable = bindec('0000000111');
+        $walker($dir . '/tmp', $worldWritable, $io);
+        $changePerms($dir . '/tmp', $worldWritable, $io);
+        $changePerms($dir . '/logs', $worldWritable, $io);
+    }
+
+    /**
+     * Set the security.salt value in the application's config file.
+     *
+     * @param string $dir The application's root directory.
+     * @param \Composer\IO\IOInterface $io IO interface to write to console.
+     * @return void
+     */
+    public static function setSecuritySalt($dir, $io)
+    {
+        $config = $dir . '/config/app.php';
+        $content = file_get_contents($config);
+
+        $newKey = hash('sha256', Security::randomBytes(64));
+        $content = str_replace('__SALT__', $newKey, $content, $count);
+
+        if ($count == 0) {
+            $io->write('No Security.salt placeholder to replace.');
+
+            return;
+        }
+
+        $result = file_put_contents($config, $content);
+        if ($result) {
+            $io->write('Updated Security.salt value in config/app.php');
+
+            return;
+        }
+        $io->write('Unable to update Security.salt value.');
+    }
+}