13 files changed, 1012 insertions, 6 deletions
diff --git a/phpBB/phpbb/install/console/command/install/config/default_config.php b/phpBB/phpbb/install/console/command/install/config/default_config.php
new file mode 100644
index 0000000000..75c9f94901
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/install/config/default_config.php
@@ -0,0 +1,103 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install\config;
+
+use phpbb\language\language;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Yaml\Yaml;
+
+class default_config extends \phpbb\console\command\command
+{
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 */
+	public function __construct(language $language)
+	{
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install:config:default')
+		;
+	}
+
+	/**
+	 * Display the default configuration
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$default_config = <<<EOL
+installer:
+    admin:
+        name: admin
+        password: adminadmin
+        email: admin@example.org
+
+    board:
+        lang: en
+        name: My Board
+        description: My amazing new phpBB board
+
+    database:
+        dbms: sqlite3
+        dbhost: ~
+        dbport: ~
+        dbuser: ~
+        dbpasswd: ~
+        dbname: ~
+        table_prefix: phpbb_
+
+    email:
+        enabled: false
+        smtp_delivery : ~
+        smtp_host: ~
+        smtp_auth: ~
+        smtp_user: ~
+        smtp_pass: ~
+
+    server:
+        cookie_secure: false
+        server_protocol: http://
+        force_server_vars: false
+        server_name: localhost
+        server_port: 80
+        script_path: /
+EOL;
+
+		$default_config = Yaml::parse($default_config);
+		$default_config = Yaml::dump($default_config, 10);
+		$output->writeln($default_config);
+	}
+}
diff --git a/phpBB/phpbb/install/console/command/install/config/show.php b/phpBB/phpbb/install/console/command/install/config/show.php
new file mode 100644
index 0000000000..4155440fc3
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/install/config/show.php
@@ -0,0 +1,131 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer;
+use phpbb\install\installer_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class show extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 * @param installer $installer
+	 */
+	public function __construct(language $language, factory $factory, installer $installer)
+	{
+		$this->iohandler_factory = $factory;
+		$this->installer = $installer;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install:config:show')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_SHOW_CONFIG'))
+		;
+	}
+
+	/**
+	 * Show the validated configuration
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', array($config_file)));
+
+			return;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return;
+		}
+
+		$processor = new Processor();
+		$configuration = new installer_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return;
+		}
+
+		$iohandler->add_log_message(Yaml::dump(array('installer' => $config), 10, 4, true, false));
+	}
+}
diff --git a/phpBB/phpbb/install/console/command/install/config/validate.php b/phpBB/phpbb/install/console/command/install/config/validate.php
new file mode 100644
index 0000000000..19b6f99a8b
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/install/config/validate.php
@@ -0,0 +1,132 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install\config;
+
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer;
+use phpbb\install\installer_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class validate extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 * @param installer $installer
+	 */
+	public function __construct(language $language, factory $factory, installer $installer)
+	{
+		$this->iohandler_factory = $factory;
+		$this->installer = $installer;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install:config:validate')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_VALIDATE_CONFIG'))
+		;
+	}
+
+	/**
+	 * Validate the configuration file
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', array($config_file)));
+
+			return 1;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return 1;
+		}
+
+		$processor = new Processor();
+		$configuration = new installer_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return 1;
+		}
+
+		$iohandler->add_success_message('CONFIGURATION_VALID');
+		return 0;
+	}
+}
diff --git a/phpBB/phpbb/install/console/command/install/install.php b/phpBB/phpbb/install/console/command/install/install.php
new file mode 100644
index 0000000000..d3f6d363f8
--- /dev/null
+++ b/phpBB/phpbb/install/console/command/install/install.php
@@ -0,0 +1,194 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install\console\command\install;
+
+use phpbb\install\exception\installer_exception;
+use phpbb\install\helper\iohandler\cli_iohandler;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\installer;
+use phpbb\install\installer_configuration;
+use phpbb\language\language;
+use Symfony\Component\Config\Definition\Exception\Exception;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Yaml;
+
+class install extends \phpbb\console\command\command
+{
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * Constructor
+	 *
+	 * @param language $language
+	 * @param factory $factory
+	 * @param installer $installer
+	 */
+	public function __construct(language $language, factory $factory, installer $installer)
+	{
+		$this->iohandler_factory = $factory;
+		$this->installer = $installer;
+		$this->language = $language;
+
+		parent::__construct(new \phpbb\user($language, 'datetime'));
+	}
+
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function configure()
+	{
+		$this
+			->setName('install')
+			->addArgument(
+				'config-file',
+				InputArgument::REQUIRED,
+				$this->language->lang('CLI_CONFIG_FILE'))
+			->setDescription($this->language->lang('CLI_INSTALL_BOARD'))
+		;
+	}
+
+	/**
+	 * Executes the command install.
+	 *
+	 * Install the board
+	 *
+	 * @param InputInterface  $input  An InputInterface instance
+	 * @param OutputInterface $output An OutputInterface instance
+	 *
+	 * @return null
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output)
+	{
+		// @todo check that phpBB is not already installed
+
+		$this->iohandler_factory->set_environment('cli');
+
+		/** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
+		$iohandler = $this->iohandler_factory->get();
+		$style = new SymfonyStyle($input, $output);
+		$iohandler->set_style($style, $output);
+
+		$this->installer->set_iohandler($iohandler);
+
+		$config_file = $input->getArgument('config-file');
+
+		if (!is_file($config_file))
+		{
+			$iohandler->add_error_message(array('MISSING_FILE', array($config_file)));
+
+			return;
+		}
+
+		try
+		{
+			$config = Yaml::parse(file_get_contents($config_file), true, false);
+		}
+		catch (ParseException $e)
+		{
+			$iohandler->add_error_message('INVALID_YAML_FILE');
+
+			return;
+		}
+
+		$processor = new Processor();
+		$configuration = new installer_configuration();
+
+		try
+		{
+			$config = $processor->processConfiguration($configuration, $config);
+		}
+		catch (Exception $e)
+		{
+			$iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
+
+			return;
+		}
+
+		$this->register_configuration($iohandler, $config);
+
+		try
+		{
+			$this->installer->run();
+		}
+		catch (installer_exception $e)
+		{
+			$iohandler->add_error_message($e->getMessage());
+			return;
+		}
+	}
+
+	/**
+	 * Register the configuration to simulate the forms.
+	 *
+	 * @param cli_iohandler $iohandler
+	 * @param array $config
+	 */
+	private function register_configuration(cli_iohandler $iohandler, $config)
+	{
+		$iohandler->set_input('admin_name', $config['admin']['name']);
+		$iohandler->set_input('admin_pass1', $config['admin']['password']);
+		$iohandler->set_input('admin_pass2', $config['admin']['password']);
+		$iohandler->set_input('board_email', $config['admin']['email']);
+		$iohandler->set_input('submit_admin', 'submit');
+
+		$iohandler->set_input('default_lang', $config['board']['lang']);
+		$iohandler->set_input('board_name', $config['board']['name']);
+		$iohandler->set_input('board_description', $config['board']['description']);
+		$iohandler->set_input('submit_board', 'submit');
+
+		$iohandler->set_input('dbms', $config['database']['dbms']);
+		$iohandler->set_input('dbhost', $config['database']['dbhost']);
+		$iohandler->set_input('dbport', $config['database']['dbport']);
+		$iohandler->set_input('dbuser', $config['database']['dbuser']);
+		$iohandler->set_input('dbpasswd', $config['database']['dbpasswd']);
+		$iohandler->set_input('dbname', $config['database']['dbname']);
+		$iohandler->set_input('table_prefix', $config['database']['table_prefix']);
+		$iohandler->set_input('submit_database', 'submit');
+
+		$iohandler->set_input('email_enable', $config['email']['enabled']);
+		$iohandler->set_input('smtp_delivery', $config['email']['smtp_delivery']);
+		$iohandler->set_input('smtp_host', $config['email']['smtp_host']);
+		$iohandler->set_input('smtp_auth', $config['email']['smtp_auth']);
+		$iohandler->set_input('smtp_user', $config['email']['smtp_user']);
+		$iohandler->set_input('smtp_pass', $config['email']['smtp_pass']);
+		$iohandler->set_input('submit_email', 'submit');
+
+		$iohandler->set_input('cookie_secure', $config['server']['cookie_secure']);
+		$iohandler->set_input('server_protocol', $config['server']['server_protocol']);
+		$iohandler->set_input('force_server_vars', $config['server']['force_server_vars']);
+		$iohandler->set_input('server_name', $config['server']['server_name']);
+		$iohandler->set_input('server_port', $config['server']['server_port']);
+		$iohandler->set_input('script_path', $config['server']['script_path']);
+		$iohandler->set_input('submit_server', 'submit');
+	}
+}
diff --git a/phpBB/phpbb/install/helper/config.php b/phpBB/phpbb/install/helper/config.php
index 5c1348c06d..cf51432332 100644
--- a/phpBB/phpbb/install/helper/config.php
+++ b/phpBB/phpbb/install/helper/config.php
@@ -147,6 +147,11 @@ class config
 	 */
 	public function get_time_remaining()
 	{
+		if ($this->system_data['max_execution_time'] <= 0)
+		{
+			return 1;
+		}
+
 		return ($this->system_data['start_time'] + $this->system_data['max_execution_time']) - time();
 	}
 
@@ -157,6 +162,11 @@ class config
 	 */
 	public function get_memory_remaining()
 	{
+		if ($this->system_data['memory_limit'] <= 0)
+		{
+			return 1;
+		}
+
 		if (function_exists('memory_get_usage'))
 		{
 			return ($this->system_data['memory_limit'] - memory_get_usage());
diff --git a/phpBB/phpbb/install/helper/iohandler/ajax_iohandler.php b/phpBB/phpbb/install/helper/iohandler/ajax_iohandler.php
index 71571fecba..85cb2ca753 100644
--- a/phpBB/phpbb/install/helper/iohandler/ajax_iohandler.php
+++ b/phpBB/phpbb/install/helper/iohandler/ajax_iohandler.php
@@ -182,6 +182,7 @@ class ajax_iohandler extends iohandler_base
 			'errors' => $this->errors,
 			'warnings' => $this->warnings,
 			'logs' => $this->logs,
+			'success' => $this->success,
 		);
 
 		if (!empty($this->form))
@@ -208,6 +209,7 @@ class ajax_iohandler extends iohandler_base
 		$this->errors = array();
 		$this->warnings = array();
 		$this->logs = array();
+		$this->success = array();
 		$this->nav_data = array();
 
 		if ($this->request_client_refresh)
diff --git a/phpBB/phpbb/install/helper/iohandler/cli_iohandler.php b/phpBB/phpbb/install/helper/iohandler/cli_iohandler.php
new file mode 100644
index 0000000000..d990f48925
--- /dev/null
+++ b/phpBB/phpbb/install/helper/iohandler/cli_iohandler.php
@@ -0,0 +1,235 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\helper\iohandler;
+
+use phpbb\install\exception\installer_exception;
+use Symfony\Component\Console\Helper\ProgressBar;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\OutputStyle;
+
+/**
+ * Input-Output handler for the CLI frontend
+ */
+class cli_iohandler extends iohandler_base
+{
+	/**
+	 * @var OutputInterface
+	 */
+	protected $output;
+
+	/**
+	 * @var OutputStyle
+	 */
+	protected $io;
+
+	/**
+	 * @var array
+	 */
+	protected $input_values = array();
+
+	/**
+	 * @var ProgressBar
+	 */
+	protected $progress_bar;
+
+	/**
+	 * Set the style and output used to display feedback;
+	 *
+	 * @param OutputStyle $style
+	 */
+	public function set_style(OutputStyle $style, OutputInterface $output)
+	{
+		$this->io = $style;
+		$this->output = $output;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_input($name, $default, $multibyte = false)
+	{
+		$result = $default;
+
+		if (isset($this->input_values[$name]))
+		{
+			$result = $this->input_values[$name];
+		}
+
+
+		if ($multibyte)
+		{
+			return utf8_normalize_nfc($result);
+		}
+
+		return $result;
+	}
+
+	public function set_input($name, $value)
+	{
+		$this->input_values[$name] = $value;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_server_variable($name, $default = '')
+	{
+		return $default;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_header_variable($name, $default = '')
+	{
+		return $default;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_secure()
+	{
+		return false;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function add_user_form_group($title, $form)
+	{
+		throw new installer_exception('MISSING_DATA');
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function send_response()
+	{
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_error_message($error_title, $error_description = false)
+	{
+		$this->io->newLine();
+
+		$message = $this->translate_message($error_title, $error_description);
+		$this->io->error($message['title'] . "\n" . $message['description']);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->io->newLine(2);
+			$this->progress_bar->display();
+		}
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_warning_message($warning_title, $warning_description = false)
+	{
+		$this->io->newLine();
+
+		$message = $this->translate_message($warning_title, $warning_description);
+		$this->io->warning($message['title'] . "\n" . $message['description']);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->io->newLine(2);
+			$this->progress_bar->display();
+		}
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_log_message($log_title, $log_description = false)
+	{
+		if ($this->output->getVerbosity() > OutputInterface::VERBOSITY_NORMAL)
+		{
+			$this->output->writeln(sprintf('[%3d/%-3d] ---- %s', $this->current_task_progress, $this->task_progress_count, $this->translate_message($log_title, $log_description)['title']));
+		}
+	}
+
+	/**
+	 * {@inheritdoc
+	 */
+	public function add_success_message($error_title, $error_description = false)
+	{
+		$this->io->newLine();
+
+		$message = $this->translate_message($error_title, $error_description);
+		$this->io->success($message['title'] . "\n" . $message['description']);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->io->newLine(2);
+			$this->progress_bar->display();
+		}
+	}
+
+	public function set_task_count($task_count)
+	{
+		parent::set_task_count($task_count);
+
+		if ($this->output->getVerbosity() === OutputInterface::VERBOSITY_NORMAL)
+		{
+			$this->progress_bar = $this->io->createProgressBar($task_count);
+			$this->progress_bar->setFormat(
+				"    %current:3s%/%max:-3s% %bar%  %percent:3s%%\n" .
+				"             %message%\n");
+			$this->progress_bar->setBarWidth(60);
+
+			if (!defined('PHP_WINDOWS_VERSION_BUILD')) {
+				$this->progress_bar->setEmptyBarCharacter('░'); // light shade character \u2591
+				$this->progress_bar->setProgressCharacter('');
+				$this->progress_bar->setBarCharacter('▓'); // dark shade character \u2593
+			}
+			$this->progress_bar->setMessage('');
+			$this->io->newLine(2);
+			$this->progress_bar->start();
+		}
+	}
+
+	public function set_progress($task_lang_key, $task_number)
+	{
+		parent::set_progress($task_lang_key, $task_number);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->progress_bar->setProgress($this->current_task_progress);
+			$this->progress_bar->setMessage($this->current_task_name);
+		}
+		else
+		{
+			$this->output->writeln(sprintf('[%3d/%-3d] %s', $this->current_task_progress, $this->task_progress_count, $this->current_task_name));
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function finish_progress($message_lang_key)
+	{
+		parent::finish_progress($message_lang_key);
+
+		if ($this->progress_bar !== null)
+		{
+			$this->progress_bar->finish();
+			$this->progress_bar = null;
+		}
+	}
+}
diff --git a/phpBB/phpbb/install/helper/iohandler/factory.php b/phpBB/phpbb/install/helper/iohandler/factory.php
index 0af75b78ae..7081af06a5 100644
--- a/phpBB/phpbb/install/helper/iohandler/factory.php
+++ b/phpBB/phpbb/install/helper/iohandler/factory.php
@@ -59,7 +59,7 @@ class factory
 	 */
 	public function get()
 	{
-		switch ($this->environment)
+		if ($this->container->has('installer.helper.iohandler_' . $this->environment))
 		{
 			case 'ajax':
 				return $this->container->get('installer.helper.iohandler_ajax');
@@ -68,9 +68,14 @@ class factory
 				// @todo replace this
 				return $this->container->get('installer.helper.iohandler_ajax');
 			break;
+			case 'cli':
+				return $this->container->get('installer.helper.iohandler_cli');
+			break;
 			default:
 				throw new iohandler_not_implemented_exception();
 			break;
 		}
+
+		throw new iohandler_not_implemented_exception();
 	}
 }
diff --git a/phpBB/phpbb/install/helper/iohandler/iohandler_base.php b/phpBB/phpbb/install/helper/iohandler/iohandler_base.php
index f767ecf4e9..006411f1e3 100644
--- a/phpBB/phpbb/install/helper/iohandler/iohandler_base.php
+++ b/phpBB/phpbb/install/helper/iohandler/iohandler_base.php
@@ -44,6 +44,13 @@ abstract class iohandler_base implements iohandler_interface
 	protected $logs;
 
 	/**
+	 * Array of success messages
+	 *
+	 * @var array
+	 */
+	protected $success;
+
+	/**
 	 * @var \phpbb\language\language
 	 */
 	protected $language;
@@ -71,6 +78,7 @@ abstract class iohandler_base implements iohandler_interface
 		$this->errors	= array();
 		$this->warnings	= array();
 		$this->logs		= array();
+		$this->success	= array();
 
 		$this->task_progress_count		= 0;
 		$this->current_task_progress	= 0;
@@ -114,6 +122,14 @@ abstract class iohandler_base implements iohandler_interface
 	/**
 	 * {@inheritdoc}
 	 */
+	public function add_success_message($success_title, $success_description = false)
+	{
+		$this->success[] = $this->translate_message($success_title, $success_description);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
 	public function set_task_count($task_count)
 	{
 		$this->task_progress_count = $task_count;
@@ -124,11 +140,27 @@ abstract class iohandler_base implements iohandler_interface
 	 */
 	public function set_progress($task_lang_key, $task_number)
 	{
+		$this->current_task_name = '';
+
 		if (!empty($task_lang_key))
 		{
 			$this->current_task_name = $this->language->lang($task_lang_key);
-			$this->current_task_progress = $task_number;
 		}
+
+		$this->current_task_progress = $task_number;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function finish_progress($message_lang_key)
+	{
+		if (!empty($message_lang_key))
+		{
+			$this->current_task_name = $this->language->lang($message_lang_key);
+		}
+
+		$this->current_task_progress = $this->task_progress_count;
 	}
 
 	/**
diff --git a/phpBB/phpbb/install/helper/iohandler/iohandler_interface.php b/phpBB/phpbb/install/helper/iohandler/iohandler_interface.php
index c40fea24ce..44b409bb0a 100644
--- a/phpBB/phpbb/install/helper/iohandler/iohandler_interface.php
+++ b/phpBB/phpbb/install/helper/iohandler/iohandler_interface.php
@@ -85,7 +85,7 @@ interface iohandler_interface
 	 *
 	 * @param string|array		$warning_title			Title of the warning message
 	 * @param string|bool|array	$warning_description	Description of the warning (and possibly guidelines to resolve it),
-	 * 													or false if the error description is not available
+	 * 													or false if the warning description is not available
 	 */
 	public function add_warning_message($warning_title, $warning_description = false);
 
@@ -96,12 +96,26 @@ interface iohandler_interface
 	 * resolved as printf($param[0], $param[1], ...).
 	 *
 	 * @param string|array		$log_title			Title of the log message
-	 * @param string|bool|array	$log_description	Description of the log (and possibly guidelines to resolve it),
-	 * 												or false if the error description is not available
+	 * @param string|bool|array	$log_description	Description of the log,
+	 * 												or false if the log description is not available
 	 */
 	public function add_log_message($log_title, $log_description = false);
 
 	/**
+	 * Adds a success message to the rendering queue
+	 *
+	 * Note: When an array is passed into the parameters below, it will be
+	 * resolved as printf($param[0], $param[1], ...).
+	 *
+	 * @param string|array		$success_title			Title of the success message
+	 * @param string|bool|array	$success_description	Description of the success,
+	 * 													or false if the success description is not available
+	 *
+	 * @return null
+	 */
+	public function add_success_message($success_title, $success_description = false);
+
+	/**
 	 * Adds a requested data group to the rendering queue
 	 *
 	 * @param string	$title	Language variable with the title of the form
@@ -142,4 +156,11 @@ interface iohandler_interface
 	 * @param array	$menu_path	Array to the navigation elem
 	 */
 	public function set_finished_stage_menu($menu_path);
+
+	/**
+	 * Finish the progress bar
+	 *
+	 * @param string	$message_lang_key	Language key for the message
+	 */
+	public function finish_progress($message_lang_key);
 }
diff --git a/phpBB/phpbb/install/installer_configuration.php b/phpBB/phpbb/install/installer_configuration.php
new file mode 100644
index 0000000000..ab02da8686
--- /dev/null
+++ b/phpBB/phpbb/install/installer_configuration.php
@@ -0,0 +1,140 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\install;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class installer_configuration implements ConfigurationInterface
+{
+
+	/**
+	 * Generates the configuration tree builder.
+	 *
+	 * @return \Symfony\Component\Config\Definition\Builder\TreeBuilder The tree builder
+	 */
+	public function getConfigTreeBuilder()
+	{
+		$treeBuilder = new TreeBuilder();
+		$rootNode = $treeBuilder->root('installer');
+		$rootNode
+			->children()
+				->arrayNode('admin')
+					->children()
+						->scalarNode('name')->defaultValue('admin')->cannotBeEmpty()->end()
+						->scalarNode('password')->defaultValue('adminadmin')->cannotBeEmpty()->end()
+						->scalarNode('email')->defaultValue('admin@example.org')->cannotBeEmpty()->end()
+					->end()
+				->end()
+				->arrayNode('board')
+					->children()
+						->scalarNode('lang')
+							->defaultValue('en')
+							->cannotBeEmpty()
+							->end()
+						->scalarNode('name')
+							->defaultValue('My Board')
+							->cannotBeEmpty()
+							->end()
+						->scalarNode('description')
+						->defaultValue('My amazing new phpBB board')
+						->cannotBeEmpty()
+						->end()
+					->end()
+				->end()
+				->arrayNode('database')
+					->children()
+						->scalarNode('dbms')
+							->defaultValue('sqlite3')
+							->cannotBeEmpty()
+							->isRequired()
+							->end()
+						->scalarNode('dbhost')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbport')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbuser')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbpasswd')
+							->defaultValue(null)
+							->end()
+						->scalarNode('dbname')
+							->defaultValue(null)
+							->end()
+						->scalarNode('table_prefix')
+							->defaultValue('phpbb_')
+							->cannotBeEmpty()
+							->isRequired()
+							->end()
+					->end()
+				->end()
+				->arrayNode('email')
+					->canBeEnabled()
+					->addDefaultsIfNotSet()
+					->children()
+						->booleanNode('smtp_delivery')
+							->defaultValue(false)
+							->treatNullLike(false)
+							->end()
+						->scalarNode('smtp_host')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_auth')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_user')
+							->defaultValue(null)
+							->end()
+						->scalarNode('smtp_pass')
+							->defaultValue(null)
+							->end()
+					->end()
+				->end()
+				->arrayNode('server')
+					->children()
+						->booleanNode('cookie_secure')
+							->defaultValue(false)
+							->treatNullLike(false)
+							->end()
+						->scalarNode('server_protocol')
+							->defaultValue('http://')
+							->cannotBeEmpty()
+							->end()
+						->booleanNode('force_server_vars')
+							->defaultValue(false)
+							->treatNullLike(false)
+							->end()
+						->scalarNode('server_name')
+							->defaultValue('localhost')
+							->cannotBeEmpty()
+							->end()
+						->integerNode('server_port')
+							->defaultValue(80)
+							->min(1)
+							->cannotBeEmpty()
+							->end()
+						->scalarNode('script_path')
+							->defaultValue('/')
+							->cannotBeEmpty()
+							 ->end()
+					->end()
+				->end()
+			->end()
+		;
+		return $treeBuilder;
+	}
+}
diff --git a/phpBB/phpbb/install/module/obtain_data/task/obtain_database_data.php b/phpBB/phpbb/install/module/obtain_data/task/obtain_database_data.php
index 0c1146d9f5..f0e7f1f686 100644
--- a/phpBB/phpbb/install/module/obtain_data/task/obtain_database_data.php
+++ b/phpBB/phpbb/install/module/obtain_data/task/obtain_database_data.php
@@ -238,7 +238,7 @@ class obtain_database_data extends \phpbb\install\task_base implements \phpbb\in
 			$connect_test = $this->database_helper->check_database_connection($dbms, $dbhost, $dbport, $dbuser, $dbpass, $dbname, $table_prefix);
 			if (is_array($connect_test))
 			{
-				foreach ($prefix_valid as $error)
+				foreach ($connect_test as $error)
 				{
 					$this->io_handler->add_error_message(
 						$error['title'],
diff --git a/phpBB/phpbb/install/module/requirements/module.php b/phpBB/phpbb/install/module/requirements/module.php
index d87ca15128..208cb5aad6 100644
--- a/phpBB/phpbb/install/module/requirements/module.php
+++ b/phpBB/phpbb/install/module/requirements/module.php
@@ -14,6 +14,7 @@
 namespace phpbb\install\module\requirements;
 
 use phpbb\install\exception\user_interaction_required_exception;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
 
 class module extends \phpbb\install\module_base
 {