If any errors were reported, fail BazelBuildTool with code 1

Author: keynmol

scip-semanticdb/src/main/java/com/sourcegraph/scip_semanticdb/BazelBuildTool.java

@@ -31,17 +31,32 @@ public static int runAndReturnExitCode(String[] args) throws IOException, Interr
     }
 
     List<MavenPackage> mavenPackages = mavenPackages(options);
-    ScipSemanticdbOptions scipOptions =
-        new ScipSemanticdbOptions(
-            options.targetroots,
-            options.output,
-            options.sourceroot,
+    ScipSemanticdbReporter reporter =
             new ScipSemanticdbReporter() {
+              private boolean hasErrors = false;
               @Override
               public void error(Throwable e) {
                 e.printStackTrace(System.err);
+                hasErrors = true;
               }
-            },
+
+              @Override
+              public void error(String message) {
+                System.err.println("ERROR[scip-semanticdb]: " + message);
+                hasErrors = true;
+              }
+
+              @Override
+              public boolean hasErrors() {
+                return this.hasErrors;
+              }
+            };
+    ScipSemanticdbOptions scipOptions =
+        new ScipSemanticdbOptions(
+            options.targetroots,
+            options.output,
+            options.sourceroot,
+            reporter,
             LsifToolInfo.newBuilder().setName("scip-java").setVersion("HEAD").build(),
             "java",
             ScipOutputFormat.TYPED_PROTOBUF,
@@ -50,10 +65,14 @@ public void error(Throwable e) {
             "",
             true);
     ScipSemanticdb.run(scipOptions);
+
     if (!scipOptions.reporter.hasErrors()) {
-      System.out.println("done: " + scipOptions.output);
+        System.out.println("done: " + scipOptions.output);
+        return 0;
+    } else {
+        System.out.println("SCIP index generation failed");
+        return 1;
     }
-    return 0;
   }
 
   public static List<MavenPackage> mavenPackages(BazelOptions options)