init

composer.json

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+{
+  "name": "vahidov/netteassets",
+  "description": "Nette assests",
+  "type": "library",
+  "require": {
+    "php": ">=7.0",
+    "latte/latte": "^2.4",
+    "nette/di": "^2.4",
+    "nette/utils": "^2.4"
+  },
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Danil Vahidov",
+      "email": "vahidov@gmail.com"
+    }
+  ],
+  "autoload": {
+    "psr-0": {
+      "Vahidov": "src"
+    }
+  },
+  "minimum-stability": "dev"
+}

src/vahidov/NetteAssets/AssetMacro.php

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+<?php
+declare(strict_types = 1);
+
+namespace Vahidov\NetteAssets;
+
+use Nette;
+use Latte;
+
+
+class AssetMacro extends Latte\Macros\MacroSet
+{
+    use Nette\SmartObject;
+
+    const CONFIG_PROVIDER = 'assetMacroConfig';
+
+
+    public static function install(Latte\Compiler $compiler)
+    {
+        $me = new self($compiler);
+        $me->addMacro('asset', [$me, 'macroAsset']);
+        $me->addMacro('livereloadscript', [$me, 'macroLivereloadScript']);
+    }
+
+    public function macroAsset(Latte\MacroNode $node, Latte\PhpWriter $writer): string
+    {
+        if ($node->modifiers && $node->modifiers!='|noescape') {
+            throw new Latte\CompileException('Only \'noescape\' modifier is allowed in ' . $node->getNotation());
+        }
+        // Validate arguments count
+        $args = trim($node->args);
+        $argsCount = $args==='' ? 0 : (substr_count($args, ',') + 1);
+        if ($argsCount===0) {
+            throw new Latte\CompileException("Assets macro requires at least one argument.");
+        }
+
+        return $writer->write(
+            'echo ' . ($node->modifiers!=='|noescape' ? '%escape' : '') .
+            '(' . self::class . '::getOutputAsset(' .
+            '%node.word, ' .
+            '%node.array, ' .
+            '$this->global->' . self::CONFIG_PROVIDER . '))');
+    }
+
+    public static function getOutputAsset($asset, array $args, $config): string
+    {
+        if ($config['productionMode']!=true) {
+            return ($config['scripthost'] ? $config['scripthost'] : '//' . $_SERVER['HTTP_HOST']) . ($config['scriptport'] ? ':' . $config['scriptport'] : '') . '/' . trim($asset, '/');
+        } else {
+            $asset = trim($asset, '/');
+            if (isset($config['manifest-data'][$asset])) {
+                return '/' . $config['manifest-data'][$asset];
+            }
+            return '/' . $asset;
+        }
+    }
+
+
+    public function macroLivereloadScript(Latte\MacroNode $node, Latte\PhpWriter $writer): string
+    {
+        if ($node->modifiers && $node->modifiers!='|noescape') {
+            throw new Latte\CompileException('Only \'noescape\' modifier is allowed in ' . $node->getNotation());
+        }
+        return $writer->write(
+            'echo ' .
+            '(' . self::class . '::getOutputLivereloadScript(' . '$this->global->' . self::CONFIG_PROVIDER . '))');
+    }
+
+    public static function getOutputLivereloadScript($config): string
+    {
+        if ($config['productionMode']==true) {
+            return '';
+        }
+        return '<script type="text/javascript" src="' . ($config['livereloadhost'] ? $config['livereloadhost'] : '//' . $_SERVER['HTTP_HOST']) . ($config['livereloadport'] ? ':' . $config['livereloadport'] : '') . '/livereload.js' . '"></script>';
+    }
+
+
+    public static function getManifest(array $config): array
+    {
+        $path = rtrim($config['wwwDir'], '/') . '/../../' . $config['manifestFile'];
+        if (!is_file($path)) {
+            return [];
+        }
+        return Nette\Utils\Json::decode(file_get_contents($path), Nette\Utils\Json::FORCE_ARRAY);
+    }
+
+}

src/vahidov/NetteAssets/DI/AssetsExtension.php

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+<?php declare(strict_types = 1);
+
+namespace Vahidov\NetteAssets\DI;
+
+use Nette\DI;
+use Vahidov\NetteAssets\AssetMacro;
+
+class AssetsExtension extends Nette\DI\CompilerExtension
+{
+
+    public $defaults = [
+        'appDir' => '%appDir%',
+        'wwwDir' => '%wwwDir%',
+        'productionMode' => '%productionMode%',
+        'manifestFile' => '',
+        'manifest-data' => [],
+    ];
+
+    public function beforeCompile(): void
+    {
+        $builder = $this->getContainerBuilder();
+        $config = $this->getConfig($this->defaults);
+        $this->defaults['manifest-data'] = AssetMacro::getManifest($config);
+        $config = $this->getConfig($this->defaults);
+
+        $builder->getDefinition('latte.latteFactory')
+            ->addSetup("?->addProvider(?, ?)", ['@self', AssetMacro::CONFIG_PROVIDER, $config])
+            ->addSetup("?->onCompile[] = function(\$engine) { " .
+                AssetMacro::class . "::install(\$engine->getCompiler()); }",
+                ['@self']
+            );
+    }
+}