From ee286ab18bbceb63e4a80b3b92b05b8f96d724a3 Mon Sep 17 00:00:00 2001
From: christofluethi <christofluethi@users.noreply.github.com>
Date: Fri, 6 Dec 2024 12:29:24 +0100
Subject: [PATCH] add note for legacy configroot.

---
 content/en/docs/10.0/101_create.md | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/content/en/docs/10.0/101_create.md b/content/en/docs/10.0/101_create.md
index d992b67d..8e8f9a9f 100644
--- a/content/en/docs/10.0/101_create.md
+++ b/content/en/docs/10.0/101_create.md
@@ -25,7 +25,24 @@ mvn io.quarkus:quarkus-maven-plugin:{{% param "quarkusVersion" %}}:create-extens
   -DwithoutTests 
 ```
 
-{{% alert color="warning" %}}
+{{% alert color="warning" title="ConfigRoot" %}}
+This extension lab uses a legacy annotation `@ConfigRoot` for the configuration class. Make sure your `maven-compiler-plugin` in your `techlab-extension-appinfo/pom.xml` looks like this:
+
+```xml
+<plugin>    
+    <artifactId>maven-compiler-plugin</artifactId>    
+    <version>${compiler-plugin.version}</version>    
+    <configuration>    
+        <parameters>true</parameters>    
+         <compilerArgs>    
+            <arg>-AlegacyConfigRoot=true</arg>    
+        </compilerArgs>    
+    </configuration>    
+</plugin>
+```
+{{% /alert %}}
+
+{{% alert color="info" title="Naming" %}}
 We will use the prefix `techlab-` for our extension. Extensions starting with `quarkus-` are usually meant to be official extensions built and supported by the quarkus core team. Therefore, you should not prefix your own extensions with `quarkus-`.
 {{% /alert %}}