add upgrade command

src/BackpackServiceProvider.php

@@ -28,6 +28,7 @@ class BackpackServiceProvider extends ServiceProvider
         app\Console\Commands\CreateUser::class,
         app\Console\Commands\PublishBackpackMiddleware::class,
         app\Console\Commands\PublishView::class,
+        app\Console\Commands\Upgrade\UpgradeCommand::class,
         app\Console\Commands\Addons\RequireDevTools::class,
         app\Console\Commands\Addons\RequireEditableColumns::class,
         app\Console\Commands\Addons\RequirePro::class,

src/app/Console/Commands/Upgrade/Concerns/ExtractsFirstInteger.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Backpack\CRUD\app\Console\Commands\Upgrade\Concerns;
+
+trait ExtractsFirstInteger
+{
+    /**
+     * Extract the first integer occurrence from the given string.
+     */
+    protected function extractFirstInteger(string $value): ?int
+    {
+        if (preg_match('/(\d+)/', $value, $matches)) {
+            return (int) $matches[1];
+        }
+
+        return null;
+    }
+}

src/app/Console/Commands/Upgrade/Concerns/InteractsWithCrudControllers.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Backpack\CRUD\app\Console\Commands\Upgrade\Concerns;
+
+use Backpack\CRUD\app\Console\Commands\Upgrade\UpgradeContext;
+
+/**
+ * @mixin \Backpack\CRUD\app\Console\Commands\Upgrade\Step
+ */
+trait InteractsWithCrudControllers
+{
+    /**
+     * Filter a list of file paths.
+     */
+    protected function filterCrudControllerPaths(array $paths, ?callable $contentsValidator = null): array
+    {
+        if (empty($paths)) {
+            return [];
+        }
+
+        $filtered = [];
+
+        foreach ($paths as $path) {
+            if (! $this->isCrudControllerPath($path)) {
+                continue;
+            }
+
+            $contents = $this->context()->readFile($path);
+
+            if ($contents === null) {
+                continue;
+            }
+
+            if ($contentsValidator !== null && $contentsValidator($contents, $path) !== true) {
+                continue;
+            }
+
+            $filtered[] = $path;
+        }
+
+        return $filtered;
+    }
+
+    protected function isCrudControllerPath(string $path): bool
+    {
+        return str_contains($path, 'CrudController');
+    }
+
+    abstract protected function context(): UpgradeContext;
+}

src/app/Console/Commands/Upgrade/Step.php

@@ -0,0 +1,78 @@
+<?php
+
+namespace Backpack\CRUD\app\Console\Commands\Upgrade;
+
+use Backpack\CRUD\app\Console\Commands\Upgrade\Concerns\ExtractsFirstInteger;
+
+abstract class Step
+{
+    use ExtractsFirstInteger;
+
+    public function __construct(protected UpgradeContext $context)
+    {
+    }
+
+    abstract public function title(): string;
+
+    public function description(): ?string
+    {
+        return null;
+    }
+
+    abstract public function run(): StepResult;
+
+    protected function context(): UpgradeContext
+    {
+        return $this->context;
+    }
+
+    public function canFix(StepResult $result): bool
+    {
+        return false;
+    }
+
+    public function fixMessage(StepResult $result): string
+    {
+        return 'Apply automatic fix?';
+    }
+
+    public function fix(StepResult $result): StepResult
+    {
+        return StepResult::skipped('No automatic fix available.');
+    }
+
+    public function isBlocking(): bool
+    {
+        return false;
+    }
+
+    /**
+     * Build a preview of items with an optional formatter and overflow message.
+     *
+     * @param  array<int, mixed>  $items
+     * @param  callable|null  $formatter
+     * @return array<int, string>
+     */
+    protected function previewList(
+        array $items,
+        int $limit = 10,
+        ?callable $formatter = null,
+        ?string $overflowMessage = null
+    ): array {
+        if (empty($items)) {
+            return [];
+        }
+
+        $formatter ??= static fn ($item): string => '- '.(string) $item;
+        $preview = array_slice($items, 0, $limit);
+        $details = array_map($formatter, $preview);
+
+        $remaining = count($items) - count($preview);
+
+        if ($remaining > 0) {
+            $details[] = sprintf($overflowMessage ?? '... %d more item(s) omitted.', $remaining);
+        }
+
+        return $details;
+    }
+}

src/app/Console/Commands/Upgrade/StepResult.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Backpack\CRUD\app\Console\Commands\Upgrade;
+
+class StepResult
+{
+    public function __construct(
+        public readonly StepStatus $status,
+        public readonly string $summary,
+        public readonly array $details = [],
+        public readonly array $context = []
+    ) {
+    }
+
+    public static function success(string $summary, array $details = [], array $context = []): self
+    {
+        return new self(StepStatus::Passed, $summary, $details, $context);
+    }
+
+    public static function warning(string $summary, array $details = [], array $context = []): self
+    {
+        return new self(StepStatus::Warning, $summary, $details, $context);
+    }
+
+    public static function failure(string $summary, array $details = [], array $context = []): self
+    {
+        return new self(StepStatus::Failed, $summary, $details, $context);
+    }
+
+    public static function skipped(string $summary, array $details = [], array $context = []): self
+    {
+        return new self(StepStatus::Skipped, $summary, $details, $context);
+    }
+}

src/app/Console/Commands/Upgrade/StepStatus.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Backpack\CRUD\app\Console\Commands\Upgrade;
+
+enum StepStatus: string
+{
+    case Passed = 'passed';
+    case Warning = 'warning';
+    case Failed = 'failed';
+    case Skipped = 'skipped';
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::Passed => 'done',
+            self::Warning => 'warn',
+            self::Failed => 'fail',
+            self::Skipped => 'skip',
+        };
+    }
+
+    public function color(): string
+    {
+        return match ($this) {
+            self::Passed => 'green',
+            self::Warning => 'yellow',
+            self::Failed => 'red',
+            self::Skipped => 'gray',
+        };
+    }
+
+    public function isFailure(): bool
+    {
+        return $this === self::Failed;
+    }
+
+    public function isWarning(): bool
+    {
+        return $this === self::Warning;
+    }
+}