Add configuration file installation method.

framework/core/src/Install/Console/FileDataProvider.php

@@ -0,0 +1,73 @@
+<?php
+/*
+ * This file is part of Flarum.
+ *
+ * (c) Toby Zerner <toby.zerner@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Flarum\Install\Console;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Yaml\Yaml;
+use Exception;
+
+class FileDataProvider implements DataProviderInterface
+{
+    protected $configurationFile;
+    protected $default;
+    protected $baseUrl = null;
+    protected $databaseConfiguration = [];
+    protected $adminUser = [];
+    protected $settings = [];
+
+    public function __construct(InputInterface $input)
+    {
+        // Get default configuration
+        $this->default = new DefaultsDataProvider();
+
+        // Get configuration file path
+        $this->configurationFile = $input->getOption('file');
+
+        // Check if file exists before parsing content
+        if (file_exists($this->configurationFile)) {
+            // Parse YAML
+            $configuration = Yaml::parse(file_get_contents($this->configurationFile));
+
+            // Define configuration variables
+            $this->baseUrl = isset($configuration['baseUrl']) ? rtrim($configuration['baseUrl'], '/') : null;
+            $this->databaseConfiguration = isset($configuration['databaseConfiguration']) ? $configuration['databaseConfiguration'] : array();
+            $this->adminUser = isset($configuration['adminUser']) ? $configuration['adminUser'] : array();
+            $this->settings = isset($configuration['settings']) ? $configuration['settings']: array();
+        }
+        else {
+            throw new Exception('Configuration file does not exist.');
+        }
+    }
+
+    public function getDatabaseConfiguration()
+    {
+        // Merge with defaults
+        return $this->databaseConfiguration + $this->default->getDatabaseConfiguration();
+    }
+
+    public function getBaseUrl()
+    {
+        // Merge with defaults
+        return (!is_null($this->baseUrl)) ? $this->baseUrl : $this->default->getBaseUrl();
+    }
+
+    public function getAdminUser()
+    {
+        // Merge with defaults
+        return $this->adminUser + $this->default->getAdminUser();
+    }
+
+    public function getSettings()
+    {
+        // Merge with defaults
+        return $this->settings + $this->default->getSettings();
+    }
+}

framework/core/src/Install/Console/InstallCommand.php

@@ -66,6 +66,12 @@ class InstallCommand extends AbstractCommand
                 'd',
                 InputOption::VALUE_NONE,
                 'Create default settings and user'
+            )
+            ->addOption(
+                'file',
+                'f',
+                InputOption::VALUE_REQUIRED,
+                'Use external configuration file'
             );
     }
 
@@ -99,6 +105,8 @@ class InstallCommand extends AbstractCommand
         if ($this->dataSource === null) {
             if ($this->input->getOption('defaults')) {
                 $this->dataSource = new DefaultsDataProvider();
+            } elseif ($this->input->getOption('file')) {
+                $this->dataSource = new FileDataProvider($this->input);
             } else {
                 $this->dataSource = new UserDataProvider($this->input, $this->output, $this->getHelperSet()->get('question'));
             }