From a77e0e6c78808ee953855151c45c165691ca87ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20Mu=CC=88ller?= <christian@flownative.com>
Date: Fri, 1 Nov 2024 20:58:24 +0100
Subject: [PATCH] TASK: Add nice error messages in event import

Just a few checks and exceptions to guide users of the import.
---
 .../src/Processors/EventStoreImportProcessor.php             | 4 ++++
 Neos.Neos/Classes/Command/CrCommandController.php            | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/Neos.ContentRepository.Export/src/Processors/EventStoreImportProcessor.php b/Neos.ContentRepository.Export/src/Processors/EventStoreImportProcessor.php
index 50f4474f485..5ec22cf4764 100644
--- a/Neos.ContentRepository.Export/src/Processors/EventStoreImportProcessor.php
+++ b/Neos.ContentRepository.Export/src/Processors/EventStoreImportProcessor.php
@@ -47,6 +47,10 @@ public function __construct(
         if ($overrideContentStreamId) {
             $this->contentStreamId = $overrideContentStreamId;
         }
+
+        if ($this->files->fileExists('events.jsonl') === false) {
+            throw new \InvalidArgumentException('The provided folder does not contain an events.jsonl file, so EventStoreImport is impossible.', 1730488421);
+        }
     }
 
     public function onMessage(\Closure $callback): void
diff --git a/Neos.Neos/Classes/Command/CrCommandController.php b/Neos.Neos/Classes/Command/CrCommandController.php
index d94cbeac1c9..bbdb02e33b0 100644
--- a/Neos.Neos/Classes/Command/CrCommandController.php
+++ b/Neos.Neos/Classes/Command/CrCommandController.php
@@ -91,6 +91,11 @@ public function exportCommand(string $path, string $contentRepository = 'default
      */
     public function importCommand(string $path, string $contentRepository = 'default', bool $verbose = false): void
     {
+        if (!is_dir($path)) {
+            $this->outputLine('Argument "path" has to be the directory path to the stored events and additional resources.');
+            $this->sendAndExit(1);
+        }
+
         $filesystem = new Filesystem(new LocalFilesystemAdapter($path));
 
         $contentRepositoryId = ContentRepositoryId::fromString($contentRepository);