Feature config seeder (#13259)

* Feature config seeder
Place yaml key value files in database/seeders/config to pre-populate the config database
This feature is primarily for docker images and other automation

example snmp.yaml
```yaml
snmp.community:
    - public
    - private
snmp.max_repeaters 30
```

* fix style

* include /data/config as used in docker

* respect --force option

* Confirm if re-import
Defaults to yes for --no-interaction
Don't confirm if there is nothing to do

* default to false

* typehints

database/seeders/ConfigSeeder.php

@@ -0,0 +1,78 @@
+<?php
+/*
+ * ConfigSeeder.php
+ *
+ * Imports yaml config settings from the database/seeders/config directory and imports them into the database
+ * This way we can have a nice initial config set.  Primarily for docker and other automations.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package    LibreNMS
+ * @link       http://librenms.org
+ * @copyright  2021 Tony Murray
+ * @author     Tony Murray <murraytony@gmail.com>
+ */
+
+namespace Database\Seeders;
+
+use Illuminate\Database\Seeder;
+use Illuminate\Support\Arr;
+use LibreNMS\Config;
+use Symfony\Component\Yaml\Yaml;
+
+class ConfigSeeder extends Seeder
+{
+    /**
+     * @var string[]
+     */
+    private $directories;
+
+    public function __construct()
+    {
+        $this->directories = [dirname(__FILE__) . '/config'];
+
+        if (is_dir('/data/config')) {
+            $this->directories[] = '/data/config';
+        }
+    }
+
+    public function run(): void
+    {
+        $files = array_merge(...array_map(function ($dir) {
+            return glob("$dir/*.y*ml");  // both .yml and .yaml extensions
+        }, $this->directories));
+
+        if (empty($files)) {
+            return; // nothing to do
+        }
+
+        if (\App\Models\Config::exists()) {
+            if (! $this->command->confirm(trans('commands.db:seed.existing_config'), false)) {
+                return; // don't overwrite existing settings.
+            }
+        }
+
+        foreach ($files as $file) {
+            $settings = Yaml::parse(file_get_contents($file));
+            foreach (Arr::wrap($settings) as $key => $value) {
+                if (! is_string($key)) {
+                    echo 'Skipped non-string config key: ' . json_encode($key) . PHP_EOL;
+                    continue;
+                }
+
+                Config::persist($key, $value);
+            }
+        }
+    }
+}

database/seeders/DatabaseSeeder.php

@@ -16,5 +16,6 @@ class DatabaseSeeder extends Seeder
         $this->call(DefaultAlertTemplateSeeder::class);
         $this->call(DefaultWidgetSeeder::class);
         $this->call(DefaultLegacySchemaSeeder::class);
+        $this->call(ConfigSeeder::class);
     }
 }

database/seeders/config/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

resources/lang/en/commands.php

@@ -30,6 +30,9 @@ return [
             'no-validation' => 'Cannot set :setting, it is missing validation definition.',
         ],
     ],
+    'db:seed' => [
+        'existing_config' => 'Database contains existing settings. Continue?',
+    ],
     'dev:check' => [
         'description' => 'LibreNMS code checks. Running with no options runs all checks',
         'arguments' => [