Minor adjustments

command-airline/runtime/src/main/codestarts/quarkus/quarkiverse-github-app-command-airline-codestart/java/src/main/java/org/acme/MyGitHubBot.java

@@ -1,6 +1,7 @@
 package org.acme;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.List;
 
 import org.kohsuke.github.GHEventPayload;
@@ -24,12 +25,12 @@ interface Commands {
     static class SayHello implements Commands {
 
         @Arguments
-        List<String> arguments;
+        List<String> arguments = new ArrayList<>();
 
         @Override
         public void run(GHEventPayload.IssueComment issueCommentPayload) throws IOException {
             issueCommentPayload.getIssue()
-                    .comment(":wave: Hello " + (arguments != null ? String.join(" ", arguments) : "from Bot"));
+                    .comment(":wave: Hello " + String.join(" ", arguments));
         }
     }
 

docs/modules/ROOT/pages/developer-reference.adoc

@@ -419,6 +419,39 @@ public class MyGitHubCustomizer implements GitHubCustomizer {
 }
 ----
 
+This will apply the customizations to both the application clients and the installation clients.
+
+However, some customizations can't be applied to the application clients such as configuring a rate limit checker.
+You may customize the application clients differently by implementing `customizeApplicationClient(GitHubBuilder)`:
+
+[source,java]
+----
+@Singleton
+public class MyGitHubCustomizer implements GitHubCustomizer {
+
+    @Override
+    public void customize(GitHubBuilder builder) { <1>
+       // call methods of the builder
+    }
+
+    @Override
+    public void customizeApplicationClient(GitHubBuilder builder) { <2>
+       // call methods of the builder
+    }
+}
+----
+<1> Customize the installation clients.
+<2> Customize the application clients.
+
+[NOTE]
+.About application and installation clients
+====
+A GitHub App relies on two types of GitHub clients:
+
+- The application client: it is authenticated as the application, it has very few permissions and is mostly used to create installation-specific tokens.
+- The installation client: it is created specifically for an installation of the application (i.e. it is tied where the application is installed) and it is the client you consume in your GitHub App code. It has the permissions you defined for your GitHub App.
+====
+
 == Configuration Reference
 
 The Quarkus GitHub App extension exposes the following configuration properties:

docs/modules/ROOT/pages/includes/attributes.adoc

@@ -1,4 +1,4 @@
-:quarkus-version: 3.17.0
+:quarkus-version: 3.15.2
 :quarkus-github-app-version: 2.8.0
 
 :github-api-javadoc-root-url: https://github-api.kohsuke.org/apidocs/org/kohsuke/github

integration-tests/command-airline/src/test/resources/__snapshots__/CodestartTest/testContent/src_main_java_ilove_quark_us_MyGitHubBot.java

@@ -1,6 +1,7 @@
 package ilove.quark.us;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.List;
 
 import org.kohsuke.github.GHEventPayload;
@@ -24,12 +25,12 @@ interface Commands {
     static class SayHello implements Commands {
 
         @Arguments
-        List<String> arguments;
+        List<String> arguments = new ArrayList<>();
 
         @Override
         public void run(GHEventPayload.IssueComment issueCommentPayload) throws IOException {
             issueCommentPayload.getIssue()
-                    .comment(":wave: Hello " + (arguments != null ? String.join(" ", arguments) : "from Bot"));
+                    .comment(":wave: Hello " + String.join(" ", arguments));
         }
     }
 

pom.xml

@@ -21,7 +21,7 @@
         <maven.compiler.target>17</maven.compiler.target>
         <maven.compiler.release>17</maven.compiler.release>
         <maven.compiler.parameters>true</maven.compiler.parameters>
-        <quarkus.version>3.17.2</quarkus.version>
+        <quarkus.version>3.15.2</quarkus.version>
         <compiler-plugin.version>3.13.0</compiler-plugin.version>
         <resource-plugin.version>3.3.1</resource-plugin.version>
         <dependency-plugin.version>3.8.1</dependency-plugin.version>

runtime/src/main/java/io/quarkiverse/githubapp/runtime/error/DefaultErrorHandler.java

@@ -1,5 +1,7 @@
 package io.quarkiverse.githubapp.runtime.error;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Optional;
 
 import jakarta.enterprise.context.ApplicationScoped;
@@ -30,37 +32,45 @@ public class DefaultErrorHandler implements ErrorHandler {
     @Override
     public void handleError(GitHubEvent gitHubEvent, GHEventPayload payload, Throwable t) {
         StringBuilder errorMessage = new StringBuilder();
-        errorMessage.append("Error handling delivery " + gitHubEvent.getDeliveryId() + "\n");
+        List<String> errorMessageParameters = new ArrayList<>();
+
+        errorMessage.append("Error handling delivery {").append(errorMessageParameters.size()).append("}\n");
+        errorMessageParameters.add(gitHubEvent.getDeliveryId());
         if (t instanceof ServiceDownException || t instanceof GitHubServiceDownException) {
             errorMessage
                     .append("››› GitHub APIs are not available at the moment. Have a look at https://www.githubstatus.com.\n");
         }
         if (gitHubEvent.getRepository().isPresent()) {
-            errorMessage.append("› Repository: " + gitHubEvent.getRepository().get() + "\n");
+            errorMessage.append("› Repository: {").append(errorMessageParameters.size()).append("}\n");
+            errorMessageParameters.add(gitHubEvent.getRepository().get());
         }
-        errorMessage.append("› Event:      " + gitHubEvent.getEventAction() + "\n");
+        errorMessage.append("› Event:      {").append(errorMessageParameters.size()).append("}\n");
+        errorMessageParameters.add(gitHubEvent.getEventAction());
 
         if (payload != null) {
             Optional<String> context = PayloadHelper.getContext(payload);
             if (context.isPresent()) {
-                errorMessage.append("› Context:    " + PayloadHelper.getContext(payload).get() + "\n");
+                errorMessage.append("› Context:    {").append(errorMessageParameters.size()).append("}\n");
+                errorMessageParameters.add(context.get());
             }
         }
 
         if (gitHubEvent.getAppName().isPresent()) {
-            errorMessage.append("› Redeliver:  " + String.format(REDELIVERY_URL, gitHubEvent.getAppName().get()) + "\n");
+            errorMessage.append("› Redeliver:  {").append(errorMessageParameters.size()).append("}\n");
+            errorMessageParameters.add(String.format(REDELIVERY_URL, gitHubEvent.getAppName().get()));
         }
 
         if (launchMode.isDevOrTest()) {
             errorMessage.append("› Payload:\n")
                     .append("----\n")
-                    .append(gitHubEvent.getParsedPayload().encodePrettily()).append("\n")
+                    .append("{").append(errorMessageParameters.size()).append("}\n")
                     .append("----\n");
+            errorMessageParameters.add(gitHubEvent.getParsedPayload().encodePrettily());
         }
 
         errorMessage.append("Exception");
 
-        LOG.error(errorMessage.toString(), t);
+        LOG.errorv(t, errorMessage.toString(), errorMessageParameters.toArray());
     }
 
 }