feature #147 Add twig helper functions to check if entrypoint has files (acrobat)

This PR was merged into the main branch.

Discussion
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Add twig helper functions to check if entrypoint has files

I've added 2 helper twig functions to check if the entrypoint exists and if it has files.

Closes #100

Commits
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8718558 Add twig helper functions to check if entrypoint exists

Author: weaverryan

src/Asset/EntrypointLookup.php

@@ -140,4 +140,11 @@ private function getEntriesData(): array
 
         return $this->entriesData;
     }
+
+    public function entryExists(string $entryName): bool
+    {
+        $entriesData = $this->getEntriesData();
+
+        return isset($entriesData['entrypoints'][$entryName]);
+    }
 }

src/Twig/EntryFilesTwigExtension.php

@@ -10,6 +10,7 @@
 namespace Symfony\WebpackEncoreBundle\Twig;
 
 use Psr\Container\ContainerInterface;
+use Symfony\WebpackEncoreBundle\Asset\EntrypointLookup;
 use Symfony\WebpackEncoreBundle\Asset\EntrypointLookupInterface;
 use Symfony\WebpackEncoreBundle\Asset\TagRenderer;
 use Twig\Extension\AbstractExtension;
@@ -31,6 +32,7 @@ public function getFunctions(): array
             new TwigFunction('encore_entry_css_files', [$this, 'getWebpackCssFiles']),
             new TwigFunction('encore_entry_script_tags', [$this, 'renderWebpackScriptTags'], ['is_safe' => ['html']]),
             new TwigFunction('encore_entry_link_tags', [$this, 'renderWebpackLinkTags'], ['is_safe' => ['html']]),
+            new TwigFunction('encore_entry_exists', [$this, 'entryExists']),
         ];
     }
 
@@ -58,6 +60,16 @@ public function renderWebpackLinkTags(string $entryName, string $packageName = n
             ->renderWebpackLinkTags($entryName, $packageName, $entrypointName, $attributes);
     }
 
+    public function entryExists(string $entryName, string $entrypointName = '_default'): bool
+    {
+        $entrypointLookup = $this->getEntrypointLookup($entrypointName);
+        if (!$entrypointLookup instanceof EntrypointLookup) {
+            throw new \LogicException(sprintf('Cannot use entryExists() unless the entrypoint lookup is an instance of "%s"', EntrypointLookup::class));
+        }
+
+        return $entrypointLookup->entryExists($entryName);
+    }
+
     private function getEntrypointLookup(string $entrypointName): EntrypointLookupInterface
     {
         return $this->container->get('webpack_encore.entrypoint_lookup_collection')