Squash core migrations into SQL dump

Data migrations (seed default groups, seed default permissions) are deliberately excluded.
This also allows us to remove a lot of now unnecessary public API from the migrator and migration repository.

src/Console/ConsoleServiceProvider.php

@@ -46,6 +46,8 @@ public function register()
                 ResetCommand::class,
                 ScheduleListCommand::class,
                 ScheduleRunCommand::class
+                // Used internally to create DB dumps before major releases.
+                // \Flarum\Database\Console\GenerateDumpCommand::class
             ];
         });
 

src/Database/Console/GenerateDumpCommand.php

@@ -0,0 +1,87 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Database\Console;
+
+use Flarum\Console\AbstractCommand;
+use Flarum\Foundation\Paths;
+use Illuminate\Database\Connection;
+
+class GenerateDumpCommand extends AbstractCommand
+{
+    /**
+     * @var Connection
+     */
+    protected $connection;
+
+    /**
+     * @var Paths
+     */
+    protected $paths;
+
+    /**
+     * @param Connection $connection
+     * @param Paths $paths
+     */
+    public function __construct(Connection $connection, Paths $paths)
+    {
+        $this->connection = $connection;
+        $this->paths = $paths;
+
+        parent::__construct();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this
+            ->setName('schema:dump')
+            ->setDescription('Dump DB schema');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function fire()
+    {
+        $dumpPath = __DIR__.'/../../../migrations/install.dump';
+        /** @var Connection */
+        $connection = resolve('db.connection');
+
+        $connection
+            ->getSchemaState()
+            ->withMigrationTable($connection->getTablePrefix().'migrations')
+            ->handleOutputUsing(function ($type, $buffer) {
+                $this->output->write($buffer);
+            })
+            ->dump($connection, $dumpPath);
+
+        // We need to remove any data migrations, as those won't be captured
+        // in the schema dump, and must be run separately.
+        $coreDataMigrations = [
+            '2018_07_21_000000_seed_default_groups',
+            '2018_07_21_000100_seed_default_group_permissions',
+        ];
+
+        $newDump = [];
+        $dump = file($dumpPath);
+        foreach ($dump as $line) {
+            foreach ($coreDataMigrations as $excludeMigrationId) {
+                if (strpos($line, $excludeMigrationId) !== false) {
+                    continue 2;
+                }
+            }
+            $newDump[] = $line;
+        }
+
+        file_put_contents($dumpPath, implode($newDump));
+    }
+}

src/Database/DatabaseMigrationRepository.php

@@ -88,22 +88,6 @@ public function delete($file, $extension = null)
         $query->delete();
     }
 
-    /**
-     * Create the migration repository data store.
-     *
-     * @return void
-     */
-    public function createRepository()
-    {
-        $schema = $this->connection->getSchemaBuilder();
-
-        $schema->create($this->table, function ($table) {
-            $table->increments('id');
-            $table->string('migration');
-            $table->string('extension')->nullable();
-        });
-    }
-
     /**
      * Determine if the migration repository exists.
      *

src/Database/MigrationRepositoryInterface.php

@@ -37,13 +37,6 @@ public function log($file, $extension = null);
      */
     public function delete($file, $extension = null);
 
-    /**
-     * Create the migration repository data store.
-     *
-     * @return void
-     */
-    public function createRepository();
-
     /**
      * Determine if the migration repository exists.
      *

src/Database/Migrator.php

@@ -12,8 +12,11 @@
 use Exception;
 use Flarum\Extension\Extension;
 use Illuminate\Database\ConnectionInterface;
+use Illuminate\Database\MySqlConnection;
 use Illuminate\Database\Schema\Builder;
+use Illuminate\Database\Schema\SchemaState;
 use Illuminate\Filesystem\Filesystem;
+use InvalidArgumentException;
 use Symfony\Component\Console\Output\OutputInterface;
 
 class Migrator
@@ -39,6 +42,18 @@ class Migrator
      */
     protected $schemaBuilder;
 
+    /**
+     * The DB table prefix.
+     */
+    protected $tablePrefix;
+
+    /**
+     * The database schema builder instance.
+     *
+     * @var SchemaState
+     */
+    protected $schemaState;
+
     /**
      * The output interface implementation.
      *
@@ -61,7 +76,13 @@ public function __construct(
         $this->files = $files;
         $this->repository = $repository;
 
+        if (! ($connection instanceof MySqlConnection)) {
+            throw new InvalidArgumentException('Only MySQL connections are supported');
+        }
+
+        $this->tablePrefix = $connection->getTablePrefix();
         $this->schemaBuilder = $connection->getSchemaBuilder();
+        $this->schemaState = $connection->getSchemaState();
 
         // Workaround for https://github.com/laravel/framework/issues/1186
         $connection->getDoctrineSchemaManager()->getDatabasePlatform()->registerDoctrineTypeMapping('enum', 'string');
@@ -242,6 +263,32 @@ public function resolve($path, $file)
         }
     }
 
+    /**
+     * Initialize the Flarum database from a schema dump.
+     *
+     * @param string $path to the directory containing the dump.
+     */
+    public function installFromSchema(string $path)
+    {
+        $schemaPath = "$path/install.dump";
+
+        $currDumpFile = file_get_contents($schemaPath);
+
+        file_put_contents($schemaPath, str_replace('db_prefix_', $this->tablePrefix, $currDumpFile));
+
+        $this->note('<info>Loading stored database schema:</info>');
+        $startTime = microtime(true);
+
+        $this->schemaState->handleOutputUsing(function ($type, $buffer) {
+            $this->output->write($buffer);
+        })->load($schemaPath);
+
+        $runTime = number_format((microtime(true) - $startTime) * 1000, 2);
+        $this->note('<info>Loaded stored database schema.</info> ('.$runTime.'ms)');
+
+        file_put_contents($schemaPath, $currDumpFile);
+    }
+
     /**
      * Set the output implementation that should be used by the console.
      *
@@ -268,16 +315,6 @@ protected function note($message)
         }
     }
 
-    /**
-     * Get the migration repository instance.
-     *
-     * @return MigrationRepositoryInterface
-     */
-    public function getRepository()
-    {
-        return $this->repository;
-    }
-
     /**
      * Determine if the migration repository exists.
      *
@@ -287,14 +324,4 @@ public function repositoryExists()
     {
         return $this->repository->repositoryExists();
     }
-
-    /**
-     * Get the file system instance.
-     *
-     * @return \Illuminate\Filesystem\Filesystem
-     */
-    public function getFilesystem()
-    {
-        return $this->files;
-    }
 }

src/Install/Steps/RunMigrations.php

@@ -42,7 +42,7 @@ public function run()
     {
         $migrator = $this->getMigrator();
 
-        $migrator->getRepository()->createRepository();
+        $migrator->installFromSchema($this->path);
         $migrator->run($this->path);
     }