Use custom OpenBlasFactory without lapacke and consequently libgfortran dependency at runtime

Author: CodeWithKyrian

src/Commands/InstallCommand.php

@@ -48,7 +48,7 @@ protected function askToStar(InputInterface $input, OutputInterface $output): vo
         }
 
         $helper = $this->getHelper('question');
-        $question = new ConfirmationQuestion('? All done! Would you like to show some love by starring the Transformers repo on GitHub? ', true);
+        $question = new ConfirmationQuestion('? Would you like to show some love by starring the Transformers repo on GitHub? ', true);
 
         if ($helper->ask($input, $output, $question)) {
             if (PHP_OS_FAMILY === 'Darwin') {

src/Tensor/OpenBLASFactory.php

@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+
+namespace Codewithkyrian\Transformers\Tensor;
+
+use FFI;
+use FFI\Exception as FFIException;
+use Rindow\Math\Matrix\Drivers\MatlibPHP\PhpLapack;
+use Rindow\OpenBLAS\FFI\Blas;
+use RuntimeException;
+
+/**
+ */
+class OpenBLASFactory
+{
+    private static ?FFI $ffi = null;
+
+
+    /**
+     * @param array<string> $libFiles
+     * @param array<string> $lapackeLibs
+     */
+    public function __construct(
+        string $headerFile,
+        array  $libFiles,
+    )
+    {
+        if (self::$ffi !== null) {
+            return;
+        }
+        if (!extension_loaded('ffi')) {
+            return;
+        }
+
+        $code = file_get_contents($headerFile);
+
+        foreach ($libFiles as $filename) {
+            try {
+                $ffi = FFI::cdef($code, $filename);
+            } catch (FFIException $e) {
+                continue;
+            }
+
+            self::$ffi = $ffi;
+            break;
+        }
+    }
+
+    public function isAvailable(): bool
+    {
+        return self::$ffi !== null;
+    }
+
+    public function Blas(): Blas
+    {
+        if (self::$ffi == null) {
+            throw new RuntimeException('openblas library not loaded.');
+        }
+        return new Blas(self::$ffi);
+    }
+
+    public function Lapack(): PhpLapack
+    {
+        return new PhpLapack();
+    }
+}

src/Tensor/TensorService.php

@@ -8,7 +8,6 @@
 use Codewithkyrian\TransformersLibrariesDownloader\Libraries;
 use Rindow\Math\Matrix\Drivers\AbstractMatlibService;
 use Rindow\Matlib\FFI\MatlibFactory;
-use Rindow\OpenBLAS\FFI\OpenBLASFactory;
 
 class TensorService extends AbstractMatlibService
 {
@@ -20,14 +19,12 @@ protected function injectDefaultFactories(): void
         $openblasFactory = new OpenBLASFactory(
             headerFile: Libraries::OpenBlas_OpenMP->headerFile(Transformers::$libsDir),
             libFiles: [Libraries::OpenBlas_OpenMP->libFile(Transformers::$libsDir)],
-            lapackeLibs: [Libraries::Lapacke_OpenMP->libFile(Transformers::$libsDir)],
         );
 
         $mathFactory = new MatlibFactory(
             libFiles: [Libraries::RindowMatlib_OpenMP->libFile(Transformers::$libsDir)]
         );
 
-
         // Check if OpenMP-compatible factories are available
         if ($openblasFactory->isAvailable() && $mathFactory->isAvailable()) {
             $this->openblasFactory = $openblasFactory;
@@ -41,7 +38,6 @@ protected function injectDefaultFactories(): void
         $openblasFactory = new OpenBLASFactory(
             headerFile: Libraries::OpenBlas_Serial->headerFile(Transformers::$libsDir),
             libFiles: [Libraries::OpenBlas_Serial->libFile(Transformers::$libsDir)],
-            lapackeLibs: [Libraries::Lapacke_Serial->libFile(Transformers::$libsDir)],
         );
 
         $mathFactory = new MatlibFactory(

src/Utils/LibsChecker.php

@@ -12,7 +12,7 @@ class LibsChecker
 {
     public static function check(): void
     {
-        echo "Checking TransformersPHP libraries...\n";
+        echo self::colorize("Checking TransformersPHP libraries.... ") . "\n";
 
         foreach (Libraries::cases() as $library) {
             if (!$library->exists(Transformers::$libsDir)) {
@@ -22,7 +22,7 @@ public static function check(): void
             }
         }
 
-        echo "All TransformersPHP libraries are installed\n";
+        echo self::colorize("All TransformersPHP libraries are installed") . "\n";
     }
 
     private static function downloadLibrary(string $name): void
@@ -33,11 +33,11 @@ private static function downloadLibrary(string $name): void
         $downloadUrl = Libraries::joinPaths($baseUrl, "$name.$ext");
         $downloadPath = tempnam(sys_get_temp_dir(), 'transformers-php') . ".$ext";
 
-        echo "  - Downloading $name\n";
+        echo "  - Downloading " . self::colorize($name) . "\n";
 
         Downloader::download($downloadUrl, $downloadPath);
 
-        echo "  - Installing $name : Extracting archive\n";
+        echo "  - Installing " . self::colorize($name) . " : Extracting archive\n";
 
         $archive = new \PharData($downloadPath);
 
@@ -47,4 +47,15 @@ private static function downloadLibrary(string $name): void
 
         $archive->extractTo(Transformers::$libsDir);
     }
+
+    private static function colorize(string $text, string $color = 'green'): string
+    {
+        $prefix = match ($color) {
+            'red' => "\033[31m",
+            'green' => "\033[32m",
+            'yellow' => "\033[33m",
+        };
+
+        return "$prefix$text\033[39m";
+    }
 }