diff --git a/init b/init
new file mode 100644
index 00000000..1fa01d2d
--- /dev/null
+++ b/init
@@ -0,0 +1,300 @@
+#!/usr/bin/env php
+<?php
+/**
+ * Yii Application Initialization Tool
+ *
+ * In order to run in non-interactive mode:
+ *
+ * init --env=Development --overwrite=n
+ */
+
+if (!extension_loaded('openssl')) {
+    die('The OpenSSL PHP extension is required by Yii2.');
+}
+
+$params = getParams();
+$root = str_replace('\\', '/', __DIR__);
+$envs = require "$root/environments/index.php";
+$envNames = array_keys($envs);
+
+echo "Yii Application Initialization Tool v1.0\n\n";
+
+$envName = null;
+if (empty($params['env']) || $params['env'] === '1') {
+    echo "Which environment do you want the application to be initialized in?\n\n";
+    foreach ($envNames as $i => $name) {
+        echo "  [$i] $name\n";
+    }
+    echo "\n  Your choice [0-" . (count($envs) - 1) . ', or "q" to quit] ';
+    $answer = trim(fgets(STDIN));
+
+    if (!ctype_digit($answer) || !in_array($answer, range(0, count($envs) - 1))) {
+        echo "\n  Quit initialization.\n";
+        exit(0);
+    }
+
+    if (isset($envNames[$answer])) {
+        $envName = $envNames[$answer];
+    }
+} else {
+    $envName = $params['env'];
+}
+
+if (!in_array($envName, $envNames)) {
+    $envsList = implode(', ', $envNames);
+    echo "\n  $envName is not a valid environment. Try one of the following: $envsList. \n";
+    exit(2);
+}
+
+$env = $envs[$envName];
+
+if (empty($params['env'])) {
+    echo "\n  Initialize the application under '{$envNames[$answer]}' environment? [yes|no] ";
+    $answer = trim(fgets(STDIN));
+    if (strncasecmp($answer, 'y', 1)) {
+        echo "\n  Quit initialization.\n";
+        exit(0);
+    }
+}
+
+$rootPath = "$root/environments/{$env['path']}";
+if (!is_dir($rootPath)) {
+    printError("$rootPath directory does not exist. Check path in $envName environment.");
+    exit(3);
+}
+
+echo "\n  Start initialization ...\n\n";
+
+$files = getFileList($rootPath);
+if (isset($env['skipFiles'])) {
+    $skipFiles = $env['skipFiles'];
+    array_walk($skipFiles, function(&$value) use($env, $root) { $value = "$root/$value"; });
+    $files = array_diff($files, array_intersect_key($env['skipFiles'], array_filter($skipFiles, 'file_exists')));
+}
+$all = false;
+foreach ($files as $file) {
+    if (!copyFile($root, "environments/{$env['path']}/$file", $file, $all, $params)) {
+        break;
+    }
+}
+
+$callbacks = ['setCookieValidationKey', 'setWritable', 'setExecutable', 'createSymlink'];
+foreach ($callbacks as $callback) {
+    if (!empty($env[$callback])) {
+        $callback($root, $env[$callback]);
+    }
+}
+
+echo "\n  ... initialization completed.\n\n";
+
+function getFileList($root, $basePath = '')
+{
+    $files = [];
+    $handle = opendir($root);
+    while (($path = readdir($handle)) !== false) {
+        if ($path === '.git' || $path === '.svn' || $path === '.' || $path === '..') {
+            continue;
+        }
+        $fullPath = "$root/$path";
+        $relativePath = $basePath === '' ? $path : "$basePath/$path";
+        if (is_dir($fullPath)) {
+            $files = array_merge($files, getFileList($fullPath, $relativePath));
+        } else {
+            $files[] = $relativePath;
+        }
+    }
+    closedir($handle);
+    return $files;
+}
+
+function copyFile($root, $source, $target, &$all, $params)
+{
+    if (!is_file($root . '/' . $source)) {
+        echo "       skip $target ($source not exist)\n";
+        return true;
+    }
+    if (is_file($root . '/' . $target)) {
+        if (file_get_contents($root . '/' . $source) === file_get_contents($root . '/' . $target)) {
+            echo "  unchanged $target\n";
+            return true;
+        }
+        if ($all) {
+            echo "  overwrite $target\n";
+        } else {
+            echo "      exist $target\n";
+            echo "            ...overwrite? [Yes|No|All|Quit] ";
+
+
+            $answer = !empty($params['overwrite']) ? $params['overwrite'] : trim(fgets(STDIN));
+            if (!strncasecmp($answer, 'q', 1)) {
+                return false;
+            } else {
+                if (!strncasecmp($answer, 'y', 1)) {
+                    echo "  overwrite $target\n";
+                } else {
+                    if (!strncasecmp($answer, 'a', 1)) {
+                        echo "  overwrite $target\n";
+                        $all = true;
+                    } else {
+                        echo "       skip $target\n";
+                        return true;
+                    }
+                }
+            }
+        }
+        file_put_contents($root . '/' . $target, file_get_contents($root . '/' . $source));
+        return true;
+    }
+    echo "   generate $target\n";
+    @mkdir(dirname($root . '/' . $target), 0777, true);
+    file_put_contents($root . '/' . $target, file_get_contents($root . '/' . $source));
+    return true;
+}
+
+function getParams()
+{
+    $rawParams = [];
+    if (isset($_SERVER['argv'])) {
+        $rawParams = $_SERVER['argv'];
+        array_shift($rawParams);
+    }
+
+    $params = [];
+    foreach ($rawParams as $param) {
+        if (preg_match('/^--([\w-]*\w)(=(.*))?$/', $param, $matches)) {
+            $name = $matches[1];
+            $params[$name] = isset($matches[3]) ? $matches[3] : true;
+        } else {
+            $params[] = $param;
+        }
+    }
+    return $params;
+}
+
+function setWritable($root, $paths)
+{
+    foreach ($paths as $writable) {
+        if (is_dir("$root/$writable")) {
+            if (@chmod("$root/$writable", 0777)) {
+                echo "      chmod 0777 $writable\n";
+            } else {
+                printError("Operation chmod not permitted for directory $writable.");
+            }
+        } else {
+            printError("Directory $writable does not exist.");
+        }
+    }
+}
+
+function setExecutable($root, $paths)
+{
+    foreach ($paths as $executable) {
+        if (file_exists("$root/$executable")) {
+            if (@chmod("$root/$executable", 0755)) {
+                echo "      chmod 0755 $executable\n";
+            } else {
+                printError("Operation chmod not permitted for $executable.");
+            }
+        } else {
+            printError("$executable does not exist.");
+        }
+    }
+}
+
+function setCookieValidationKey($root, $paths)
+{
+    foreach ($paths as $file) {
+        echo "   generate cookie validation key in $file\n";
+        $file = $root . '/' . $file;
+        $length = 32;
+        $bytes = openssl_random_pseudo_bytes($length);
+        $key = strtr(substr(base64_encode($bytes), 0, $length), '+/=', '_-.');
+        $content = preg_replace('/(("|\')cookieValidationKey("|\')\s*=>\s*)(""|\'\')/', "\\1'$key'", file_get_contents($file));
+        file_put_contents($file, $content);
+    }
+}
+
+function createSymlink($root, $links)
+{
+    foreach ($links as $link => $target) {
+        //first removing folders to avoid errors if the folder already exists
+        @rmdir($root . "/" . $link);
+        //next removing existing symlink in order to update the target
+        if (is_link($root . "/" . $link)) {
+            @unlink($root . "/" . $link);
+        }
+        if (@symlink($root . "/" . $target, $root . "/" . $link)) {
+            echo "      symlink $root/$target $root/$link\n";
+        } else {
+            printError("Cannot create symlink $root/$target $root/$link.");
+        }
+    }
+}
+
+/**
+ * Prints error message.
+ * @param string $message message
+ */
+function printError($message)
+{
+    echo "\n  " . formatMessage("Error. $message", ['fg-red']) . " \n";
+}
+
+/**
+ * Returns true if the stream supports colorization. ANSI colors are disabled if not supported by the stream.
+ *
+ * - windows without ansicon
+ * - not tty consoles
+ *
+ * @return boolean true if the stream supports ANSI colors, otherwise false.
+ */
+function ansiColorsSupported()
+{
+    return DIRECTORY_SEPARATOR === '\\'
+        ? getenv('ANSICON') !== false || getenv('ConEmuANSI') === 'ON'
+        : function_exists('posix_isatty') && @posix_isatty(STDOUT);
+}
+
+/**
+ * Get ANSI code of style.
+ * @param string $name style name
+ * @return integer ANSI code of style.
+ */
+function getStyleCode($name)
+{
+    $styles = [
+        'bold' => 1,
+        'fg-black' => 30,
+        'fg-red' => 31,
+        'fg-green' => 32,
+        'fg-yellow' => 33,
+        'fg-blue' => 34,
+        'fg-magenta' => 35,
+        'fg-cyan' => 36,
+        'fg-white' => 37,
+        'bg-black' => 40,
+        'bg-red' => 41,
+        'bg-green' => 42,
+        'bg-yellow' => 43,
+        'bg-blue' => 44,
+        'bg-magenta' => 45,
+        'bg-cyan' => 46,
+        'bg-white' => 47,
+    ];
+    return $styles[$name];
+}
+
+/**
+ * Formats message using styles if STDOUT supports it.
+ * @param string $message message
+ * @param string[] $styles styles
+ * @return string formatted message.
+ */
+function formatMessage($message, $styles)
+{
+    if (empty($styles) || !ansiColorsSupported()) {
+        return $message;
+    }
+
+    return sprintf("\x1b[%sm", implode(';', array_map('getStyleCode', $styles))) . $message . "\x1b[0m";
+}