From ef96f7b0518343fa48a1d74d2763cd3ed479ba70 Mon Sep 17 00:00:00 2001
From: Dimitris Kavvathas <dimitris.kavvathas@sonarsource.com>
Date: Fri, 5 Jan 2024 15:35:33 +0100
Subject: [PATCH] SONAR-21195 Convert exception to a warning when no language
 plugins are installed.

---
 .../fs/NoLanguagesPluginsMediumIT.java        | 23 ++++++++++++++-----
 .../scan/SpringProjectScanContainer.java      |  2 +-
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/sonar-scanner-engine/src/it/java/org/sonar/scanner/mediumtest/fs/NoLanguagesPluginsMediumIT.java b/sonar-scanner-engine/src/it/java/org/sonar/scanner/mediumtest/fs/NoLanguagesPluginsMediumIT.java
index d575c39d0e5..db2d45e5904 100644
--- a/sonar-scanner-engine/src/it/java/org/sonar/scanner/mediumtest/fs/NoLanguagesPluginsMediumIT.java
+++ b/sonar-scanner-engine/src/it/java/org/sonar/scanner/mediumtest/fs/NoLanguagesPluginsMediumIT.java
@@ -22,12 +22,15 @@ package org.sonar.scanner.mediumtest.fs;
 import java.io.File;
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.filefilter.FileFilterUtils;
+import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
+import org.slf4j.event.Level;
+import org.sonar.api.testfixtures.log.LogTester;
 import org.sonar.scanner.mediumtest.ScannerMediumTester;
 
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.assertj.core.api.Assertions.assertThat;
 
 public class NoLanguagesPluginsMediumIT {
   @Rule
@@ -36,15 +39,23 @@ public class NoLanguagesPluginsMediumIT {
   @Rule
   public ScannerMediumTester tester = new ScannerMediumTester();
 
+  @Rule
+  public LogTester logger = new LogTester();
+
+  @Before
+  public void before() {
+    logger.clear();
+  }
+
   @Test
   public void testNoLanguagePluginsInstalled() throws Exception {
     File projectDir = copyProject("test-resources/mediumtest/xoo/sample");
 
-    assertThatThrownBy(() -> tester
-      .newAnalysis(new File(projectDir, "sonar-project.properties"))
-      .execute())
-      .isInstanceOf(IllegalStateException.class)
-      .hasMessage("No language plugins are installed.");
+    tester.
+      newAnalysis(new File(projectDir, "sonar-project.properties"))
+      .execute();
+
+    assertThat(logger.logs(Level.WARN)).contains("No language plugins are installed.");
   }
 
   private File copyProject(String path) throws Exception {
diff --git a/sonar-scanner-engine/src/main/java/org/sonar/scanner/scan/SpringProjectScanContainer.java b/sonar-scanner-engine/src/main/java/org/sonar/scanner/scan/SpringProjectScanContainer.java
index 3382d6f25de..bef9b1fb632 100644
--- a/sonar-scanner-engine/src/main/java/org/sonar/scanner/scan/SpringProjectScanContainer.java
+++ b/sonar-scanner-engine/src/main/java/org/sonar/scanner/scan/SpringProjectScanContainer.java
@@ -149,7 +149,7 @@ public class SpringProjectScanContainer extends SpringComponentContainer {
     ScanProperties properties = getComponentByType(ScanProperties.class);
 
     if (getComponentByType(Languages.class).all().length == 0) {
-      throw new IllegalStateException("No language plugins are installed.");
+      LOG.warn("No language plugins are installed.");
     }
 
     // Log detected languages and their profiles after FS is indexed and languages detected
-- 
2.39.5