Fix phinx backend using incorrect RollbackCommand class (#991)

When using the phinx backend with Bake installed, discoverPlugin()
was finding both builtin and phinx commands. Since both RollbackCommand
and MigrationsRollbackCommand have the same defaultName(), the builtin
command was overwriting the phinx one due to alphabetical ordering.

This fix explicitly registers only the phinx-specific commands instead
of using discoverPlugin(), matching the approach used for builtin backend.

Fixes #990

Author: dereuromark

src/MigrationsPlugin.php

@@ -131,15 +131,16 @@ public function console(CommandCollection $commands): CommandCollection
             return $commands;
         }
 
+        $classes = $this->migrationCommandsList;
         if (class_exists(SimpleBakeCommand::class)) {
-            $found = $commands->discoverPlugin($this->getName());
-
-            return $commands->addMany($found);
+            $classes[] = BakeMigrationCommand::class;
+            $classes[] = BakeMigrationDiffCommand::class;
+            $classes[] = BakeMigrationSnapshotCommand::class;
+            $classes[] = BakeSeedCommand::class;
         }
 
         $found = [];
-        // Convert to a method and use config to toggle command names.
-        foreach ($this->migrationCommandsList as $class) {
+        foreach ($classes as $class) {
             $name = $class::defaultName();
             // If the short name has been used, use the full name.
             // This allows app commands to have name preference.

tests/TestCase/MigrationsPluginTest.php

@@ -0,0 +1,53 @@
+<?php
+declare(strict_types=1);
+
+namespace Migrations\Test\TestCase;
+
+use Cake\Console\CommandCollection;
+use Cake\Core\Configure;
+use Cake\TestSuite\TestCase;
+use Migrations\Command\MigrationsRollbackCommand;
+use Migrations\Command\RollbackCommand;
+use Migrations\MigrationsPlugin;
+
+class MigrationsPluginTest extends TestCase
+{
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+        Configure::delete('Migrations.backend');
+    }
+
+    /**
+     * Test that builtin backend uses RollbackCommand
+     */
+    public function testConsoleBuiltinBackendUsesCorrectRollbackCommand(): void
+    {
+        Configure::write('Migrations.backend', 'builtin');
+
+        $plugin = new MigrationsPlugin();
+        $commands = new CommandCollection();
+        $commands = $plugin->console($commands);
+
+        $this->assertTrue($commands->has('migrations rollback'));
+        $this->assertSame(RollbackCommand::class, $commands->get('migrations rollback'));
+    }
+
+    /**
+     * Test that phinx backend uses MigrationsRollbackCommand
+     *
+     * This is the reported bug in https://github.com/cakephp/migrations/issues/990
+     */
+    public function testConsolePhinxBackendUsesCorrectRollbackCommand(): void
+    {
+        Configure::write('Migrations.backend', 'phinx');
+
+        $plugin = new MigrationsPlugin();
+        $commands = new CommandCollection();
+        $commands = $plugin->console($commands);
+
+        $this->assertTrue($commands->has('migrations rollback'));
+        // Bug: RollbackCommand is loaded instead of MigrationsRollbackCommand
+        $this->assertSame(MigrationsRollbackCommand::class, $commands->get('migrations rollback'));
+    }
+}