feat: Node.js/Grunt setup detection for improved build process (#114)

* feat: add Node.js/Grunt setup check and improve build process for gruntless themes like backend-theme

* feat: enhance build process for vendor themes and improve feedback

* feat: refactor Grunt task execution and integrate into theme builder

* feat: add spacing for vendor theme warning in build process

* feat: update output handling for grunt task execution in verbose mode

Author: dermatz

docs/advanced_usage.md

@@ -37,10 +37,38 @@ This document provides detailed information and advanced tips for using MageForg
 ### Standard Magento Themes (LESS)
 
 For traditional LESS-based Magento themes, MageForge handles:
-- LESS compilation
+- LESS compilation via Grunt
 - Source map generation
 - Minification for production
 
+#### Vendor Themes
+
+MageForge automatically detects themes installed via Composer (located in `vendor/` directory):
+- **Build mode**: Skips all Grunt/Node.js steps as vendors themes have pre-built assets
+- **Watch mode**: Returns an error as vendor themes are read-only and cannot be modified
+
+This prevents accidental modification attempts and ensures build process stability.
+
+#### Themes Without Node.js/Grunt Setup
+
+MageForge automatically detects if a Magento Standard theme intentionally omits Node.js/Grunt setup. If none of the following files exist:
+- `package.json`
+- `package-lock.json`
+- `gruntfile.js`
+- `grunt-config.json`
+
+The builder will skip all Node/Grunt-related steps and only:
+- Clean static content (if in developer mode)
+- Deploy static content
+- Clean cache
+
+This is useful for:
+- Themes that use pre-compiled CSS
+- Minimal themes without custom LESS
+- Simple theme inheritance without asset compilation
+
+**Note**: Watch mode requires Node.js/Grunt setup and will return an error if these files are missing.
+
 ### Hyvä Themes (Tailwind CSS)
 
 MageForge streamlines Hyvä theme development with:

docs/commands.md

@@ -470,6 +470,9 @@ The commands rely on several services for their functionality:
 - `BuilderPool`: Manages theme builders and selects appropriate builders for themes
 - `BuilderInterface`: Implemented by all theme builders
 - `MagentoStandard\Builder`: Processes standard Magento LESS-based themes
+  - Automatically detects if Node.js/Grunt setup is present
+  - Skips Node/Grunt steps if intentionally omitted (no package.json, package-lock.json, gruntfile.js or grunt-config.json)
+  - Only performs static content deployment and cache cleaning for themes without build tools
 - Various other builders for different theme types
 
 ### Theme Services

docs/custom_theme_builders.md

@@ -308,6 +308,61 @@ public function autoRepair(string $themePath, SymfonyStyle $io, OutputInterface
 }
 ```
 
+### Best Practice: Optional Build Tool Setup
+
+If your builder uses optional build tools (like Node.js, Grunt, Webpack), consider checking if the setup exists before requiring it. This allows themes to intentionally skip certain build steps:
+
+```php
+private function hasNodeSetup(): bool
+{
+    $rootPath = '.';
+
+    return $this->fileDriver->isExists($rootPath . '/package.json')
+        || $this->fileDriver->isExists($rootPath . '/package-lock.json')
+        || $this->fileDriver->isExists($rootPath . '/gruntfile.js')
+        || $this->fileDriver->isExists($rootPath . '/grunt-config.json');
+}
+
+private function isVendorTheme(string $themePath): bool
+{
+    return str_contains($themePath, '/vendor/');
+}
+
+public function build(string $themeCode, string $themePath, SymfonyStyle $io, OutputInterface $output, bool $isVerbose): bool
+{
+    if (!$this->detect($themePath)) {
+        return false;
+    }
+
+    // Check if this is a vendor theme (read-only, pre-built assets)
+    if ($this->isVendorTheme($themePath)) {
+        if ($isVerbose) {
+            $io->note('Vendor theme detected. Skipping build steps (pre-built assets expected).');
+        }
+    } elseif ($this->hasNodeSetup()) {
+        // Check if Node/Grunt setup exists
+        if (!$this->autoRepair($themePath, $io, $output, $isVerbose)) {
+            return false;
+        }
+
+        // Execute build commands...
+    } else {
+        if ($isVerbose) {
+            $io->note('No Node.js setup detected. Skipping Node/Grunt steps.');
+        }
+    }
+
+    // Continue with other build steps (deploy, cache, etc.)
+    return true;
+}
+```
+
+This approach:
+- Prevents modification attempts on read-only vendor themes
+- Allows themes to work without specific build tools
+- Still supports full builds when tools are present
+- Provides clear feedback about what's being skipped
+
 ### The watch() Method
 
 This method starts a process that monitors changes to theme files and automatically rebuilds when necessary:

src/Service/GruntTaskRunner.php

@@ -23,16 +23,26 @@ public function runTasks(
         bool $isVerbose
     ): bool {
         try {
-            foreach (['clean', 'less'] as $task) {
-                $shellOutput = $this->shell->execute(self::GRUNT_PATH . ' ' . $task . ' --quiet');
-                if ($isVerbose) {
-                    $output->writeln($shellOutput);
-                    $io->success("'grunt $task' has been successfully executed.");
-                }
+            if ($isVerbose) {
+                $io->text('Running grunt clean...');
+                $output->writeln($this->shell->execute(self::GRUNT_PATH . ' clean'));
+            } else {
+                $this->shell->execute(self::GRUNT_PATH . ' clean --quiet');
+            }
+
+            if ($isVerbose) {
+                $io->text('Running grunt less...');
+                $output->writeln($this->shell->execute(self::GRUNT_PATH . ' less'));
+            } else {
+                $this->shell->execute(self::GRUNT_PATH . ' less --quiet');
+            }
+
+            if ($isVerbose) {
+                $io->success('Grunt tasks completed successfully.');
             }
             return true;
         } catch (\Exception $e) {
-            $io->error($e->getMessage());
+            $io->error('Failed to run grunt tasks: ' . $e->getMessage());
             return false;
         }
     }

src/Service/ThemeBuilder/MagentoStandard/Builder.php

@@ -7,6 +7,7 @@
 use Magento\Framework\Filesystem\Driver\File;
 use Magento\Framework\Shell;
 use OpenForgeProject\MageForge\Service\CacheCleaner;
+use OpenForgeProject\MageForge\Service\GruntTaskRunner;
 use OpenForgeProject\MageForge\Service\NodePackageManager;
 use OpenForgeProject\MageForge\Service\StaticContentCleaner;
 use OpenForgeProject\MageForge\Service\StaticContentDeployer;
@@ -26,7 +27,8 @@ public function __construct(
         private readonly StaticContentCleaner $staticContentCleaner,
         private readonly CacheCleaner $cacheCleaner,
         private readonly SymlinkCleaner $symlinkCleaner,
-        private readonly NodePackageManager $nodePackageManager
+        private readonly NodePackageManager $nodePackageManager,
+        private readonly GruntTaskRunner $gruntTaskRunner
     ) {
     }
 
@@ -52,37 +54,18 @@ public function build(string $themeCode, string $themePath, SymfonyStyle $io, Ou
             return false;
         }
 
-        if (!$this->autoRepair($themePath, $io, $output, $isVerbose)) {
-            return false;
-        }
-
-        // Clean symlinks in web/css/ directory before build
-        if (!$this->symlinkCleaner->cleanSymlinks($themePath, $io, $isVerbose)) {
-            return false;
-        }
-
-        // Run grunt tasks
-        try {
-            if ($isVerbose) {
-                $io->text('Running grunt clean...');
-                $this->shell->execute('node_modules/.bin/grunt clean');
-            } else {
-                $this->shell->execute('node_modules/.bin/grunt clean --quiet');
-            }
-
-            if ($isVerbose) {
-                $io->text('Running grunt less...');
-                $this->shell->execute('node_modules/.bin/grunt less');
-            } else {
-                $this->shell->execute('node_modules/.bin/grunt less --quiet');
+        // Check if this is a vendor theme (read-only, pre-built assets)
+        if ($this->isVendorTheme($themePath)) {
+            $io->warning('Vendor theme detected. Skipping Grunt steps.');
+            $io->newLine(2);
+        } elseif ($this->hasNodeSetup()) {
+            if (!$this->processNodeSetup($themePath, $io, $output, $isVerbose)) {
+                return false;
             }
-
+        } else {
             if ($isVerbose) {
-                $io->success('Grunt tasks completed successfully.');
+                $io->note('No Node.js/Grunt setup detected. Skipping Grunt steps.');
             }
-        } catch (\Exception $e) {
-            $io->error('Failed to run grunt tasks: ' . $e->getMessage());
-            return false;
         }
 
         // Deploy static content
@@ -98,6 +81,29 @@ public function build(string $themeCode, string $themePath, SymfonyStyle $io, Ou
         return true;
     }
 
+    /**
+     * Process Node.js and Grunt setup
+     */
+    private function processNodeSetup(
+        string $themePath,
+        SymfonyStyle $io,
+        OutputInterface $output,
+        bool $isVerbose
+    ): bool {
+        // Check if Node/Grunt setup exists
+        if (!$this->autoRepair($themePath, $io, $output, $isVerbose)) {
+            return false;
+        }
+
+        // Clean symlinks in web/css/ directory before build
+        if (!$this->symlinkCleaner->cleanSymlinks($themePath, $io, $isVerbose)) {
+            return false;
+        }
+
+        // Run grunt tasks
+        return $this->gruntTaskRunner->runTasks($io, $output, $isVerbose);
+    }
+
     public function autoRepair(string $themePath, SymfonyStyle $io, OutputInterface $output, bool $isVerbose): bool
     {
         $rootPath = '.';
@@ -177,6 +183,18 @@ public function watch(string $themeCode, string $themePath, SymfonyStyle $io, Ou
             return false;
         }
 
+        // Vendor themes cannot be watched (read-only)
+        if ($this->isVendorTheme($themePath)) {
+            $io->error('Watch mode is not supported for vendor themes. Vendor themes are read-only and should have pre-built assets.');
+            return false;
+        }
+
+        // Check if Node/Grunt setup is intentionally absent
+        if (!$this->hasNodeSetup()) {
+            $io->error('Watch mode requires Node.js/Grunt setup. No package.json, package-lock.json, node_modules, or grunt-config.json found.');
+            return false;
+        }
+
         // Clean static content if in developer mode
         if (!$this->staticContentCleaner->cleanIfNeeded($themeCode, $io, $output, $isVerbose)) {
             return false;
@@ -213,4 +231,35 @@ public function getName(): string
     {
         return self::THEME_NAME;
     }
+
+    /**
+     * Check if Node.js/Grunt setup exists
+     *
+     * Returns true if at least one of the required files exists
+     *
+     * @return bool
+     */
+    private function hasNodeSetup(): bool
+    {
+        $rootPath = '.';
+
+        return $this->fileDriver->isExists($rootPath . '/package.json')
+            || $this->fileDriver->isExists($rootPath . '/package-lock.json')
+            || $this->fileDriver->isExists($rootPath . '/gruntfile.js')
+            || $this->fileDriver->isExists($rootPath . '/grunt-config.json');
+    }
+
+    /**
+     * Check if theme is from vendor directory
+     *
+     * Vendor themes are installed via Composer and should not be modified.
+     * They typically have pre-built assets and don't require compilation.
+     *
+     * @param string $themePath
+     * @return bool
+     */
+    private function isVendorTheme(string $themePath): bool
+    {
+        return str_contains($themePath, '/vendor/');
+    }
 }