Add database migration to convert the vcs package fetch strategy to source to preserve behavior of existing packages

Author: codedmonkey

migrations/Version20260713143513.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260713143513 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Convert the vcs package fetch strategy to source to preserve behavior of existing packages';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // Previously the vcs fetch strategy used the default Composer drivers (using APIs where
+        // possible), which is now the behavior of the source fetch strategy. The vcs fetch
+        // strategy now always clones repositories instead.
+        $this->addSql(<<<'SQL'
+            UPDATE package SET fetch_strategy = 'source' WHERE fetch_strategy = 'vcs'
+        SQL);
+        // Packages without a fetch strategy or mirror registry fell back to the vcs fetch strategy.
+        $this->addSql(<<<'SQL'
+            UPDATE package SET fetch_strategy = 'source' WHERE fetch_strategy IS NULL AND mirror_registry_id IS NULL
+        SQL);
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql(<<<'SQL'
+            UPDATE package SET fetch_strategy = 'vcs' WHERE fetch_strategy = 'source'
+        SQL);
+    }
+}