Log the CLI process output when sample project generation test times out

Author: aloubyansky

integration-tests/sample-app/src/test/java/io/quarkus/platform/test/SampleProjectGenerationIT.java

@@ -156,7 +156,11 @@ private static void buildApp(Path projectDir) throws IOException {
                 } catch (Exception e) {
                     log.error("Failed to destroy the process", e);
                 }
-                fail("The process has exceeded the time out limit of " + getBuildAppTimeout() + " seconds");
+                final String timeoutMessage = "The process has exceeded the timeout limit of " + getBuildAppTimeout()
+                        + " seconds";
+                log.error(timeoutMessage);
+                logCliProcessOutput(cliLog, cliErrors);
+                fail(timeoutMessage);
             }
         } catch (InterruptedException e) {
             log.error("Interrupted waiting for the process to complete", e);
@@ -173,6 +177,25 @@ private static void buildApp(Path projectDir) throws IOException {
         }
     }
 
+    private static void logCliProcessOutput(Path cliLog, Path cliErrors) throws IOException {
+        if (Files.exists(cliLog)) {
+            String output = Files.readString(cliLog);
+            if (!output.isBlank()) {
+                log.info("BEGIN the CLI process output:");
+                log.info(output);
+                log.info("END the CLI process output");
+            }
+        }
+        if (Files.exists(cliLog)) {
+            String output = Files.readString(cliErrors);
+            if (!output.isBlank()) {
+                log.info("BEGIN the CLI process error output:");
+                log.info(output);
+                log.info("END the CLI process error output");
+            }
+        }
+    }
+
     private static String getMvnPath() {
         var mavenHome = System.getProperty("maven.home");
         if (mavenHome == null) {
@@ -213,7 +236,11 @@ private static Path generateSampleAppWithMaven() throws IOException {
                 } catch (Exception e) {
                     log.error("Failed to destroy the process", e);
                 }
-                fail("The process has exceeded the time out limit of " + getGenerateAppTimeout() + " seconds");
+                final String timeoutMessage = "The process has exceeded the time out limit of " + getGenerateAppTimeout()
+                        + " seconds";
+                log.error(timeoutMessage);
+                logCliProcessOutput(cliLog, cliErrors);
+                fail(timeoutMessage);
             }
         } catch (InterruptedException e) {
             log.error("Interrupted waiting for the process to complete", e);