Fix the issue in showing the actual error message

changelog.md

@@ -4,6 +4,12 @@ This file contains all the notable changes done to the Ballerina protoc-tools pa
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.3.1] - 2024-10-07
+
+### Fixed
+
+- [Fix the NPE when there is message field type of google.protobuf.Empty](https://github.com/ballerina-platform/ballerina-library/issues/7230)
+
 ## [0.3.0] - 2024-06-27
 
 ### Fixed

gradle.properties

@@ -16,16 +16,16 @@ researchgateReleaseVersion=2.8.0
 testngVersion=7.6.1
 jacocoVersion=0.8.10
 
-stdlibGrpcVersion=1.11.1
-stdlibIoVersion=1.6.0
-stdlibTimeVersion=2.4.0
+stdlibGrpcVersion=1.11.2
+stdlibIoVersion=1.6.1
+stdlibTimeVersion=2.5.0
 stdlibUrlVersion=2.4.0
 
-stdlibConstraintVersion=1.4.0
-stdlibCryptoVersion=2.7.0
+stdlibConstraintVersion=1.5.0
+stdlibCryptoVersion=2.7.2
 stdlibLogVersion=2.9.0
 stdlibOsVersion=1.8.0
-stdlibProtobufVersion=1.6.0
+stdlibProtobufVersion=1.6.1
 stdlibRandomVersion=1.5.0
 stdlibTaskVersion=2.5.0
 
@@ -34,11 +34,11 @@ stdlibFileVersion=1.9.0
 stdlibMimeVersion=2.9.0
 stdlibUuidVersion=1.8.0
 
-stdlibAuthVersion=2.11.0
-stdlibJwtVersion=2.11.0
+stdlibAuthVersion=2.11.2
+stdlibJwtVersion=2.12.1
 stdlibOAuth2Version=2.11.0
 
-stdlibHttpVersion=2.11.0
+stdlibHttpVersion=2.11.4
 
 # Ballerinax Observer
 observeVersion=1.2.3

protoc-cli/src/main/java/io/ballerina/protoc/protobuf/cmd/GrpcCmd.java

@@ -264,14 +264,14 @@ private void generateBalFile(String protoPath) {
                 }
             } catch (CodeGeneratorException e) {
                 String errorMessage = "An error occurred when generating the proto descriptor. " + e.getMessage();
-                LOG.error("An error occurred when generating the proto descriptor.", e);
                 outStream.println(errorMessage);
+                LOG.error("An error occurred when generating the proto descriptor.", e);
                 return;
             }
             if (root.getDescriptor().length == 0) {
                 String errorMsg = "An error occurred when generating the proto descriptor.";
-                LOG.error(errorMsg);
                 outStream.println(errorMsg);
+                LOG.error(errorMsg);
                 return;
             }
             LOG.debug("Successfully generated the root descriptor.");
@@ -292,8 +292,8 @@ private void generateBalFile(String protoPath) {
             } catch (CodeGeneratorException e) {
                 String errorMessage =
                         "An error occurred when generating the dependent proto descriptor. " + e.getMessage();
-                LOG.error(errorMessage, e);
                 outStream.println(errorMessage);
+                LOG.error(errorMessage, e);
                 return;
             }
             LOG.debug("Successfully generated the dependent descriptor.");
@@ -316,10 +316,10 @@ private void generateBalFile(String protoPath) {
             }
             ballerinaFileBuilder.build(this.mode);
         } catch (CodeBuilderException | CodeGeneratorException | IOException e) {
-            LOG.error("Error generating the Ballerina file.", e);
             msg.append("Error generating the Ballerina file.").append(e.getMessage())
                     .append(BalGenerationConstants.NEW_LINE_CHARACTER);
             outStream.println(msg);
+            LOG.error("Error generating the Ballerina file.", e);
             return;
         }
         msg.append("Successfully generated the Ballerina file.").append(BalGenerationConstants.NEW_LINE_CHARACTER);

protoc-cli/src/main/java/io/ballerina/protoc/protobuf/utils/BalFileGenerationUtils.java

@@ -80,7 +80,11 @@ public static ArrayList<String> generateDescriptor(String command) throws CodeGe
                     " running the protoc executor. " + e.getMessage(), e);
         }
         if (process.exitValue() != 0) {
-            handleProcessExecutionErrors(process);
+            StringBuilder errMsg = new StringBuilder();
+            for (String line : output) {
+                errMsg.append(line).append(System.lineSeparator());
+            }
+            throw new CodeGeneratorException("Process exited with the following output: \n" + errMsg);
         }
         return output;
     }

tooling-tests/src/test/java/io/ballerina/protoc/tools/ToolingUnaryTest.java

@@ -20,6 +20,7 @@
 
 import org.testng.annotations.Test;
 
+import static io.ballerina.protoc.tools.ToolingTestUtils.assertGeneratedDataTypeSourcesNegative;
 import static io.ballerina.protoc.tools.ToolingTestUtils.assertGeneratedSources;
 
 /**
@@ -103,4 +104,10 @@ public void testUnaryWithEmptyFieldMessage() {
                 "emptyFieldMessage_pb.bal", "testservice_service.bal",
                 "testservice_client.bal", "tool_test_unary_11");
     }
+
+    @Test
+    public void testUnaryWithSchemaSyntaxErrors() {
+        assertGeneratedDataTypeSourcesNegative("unary", "schemaSyntaxErrors.proto",
+                "schemaSyntaxErrors_pb.bal",  "tool_test_unary_12");
+    }
 }

tooling-tests/src/test/resources/test-src/proto-files/unary/schemaSyntaxErrors.proto

@@ -0,0 +1,61 @@
+/*
+ *  Copyright (c) 2024, WSO2 LLC. (http://www.wso2.org).
+ *
+ *  WSO2 LLC. licenses this file to you under the Apache License,
+ *  Version 2.0 (the "License"); you may not use this file except
+ *  in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ */
+
+syntax = "proto3";
+
+package test;
+
+service TestService {
+    rpc TestRPC(RequestMessage) returns (ResponseMessage);
+}
+
+enum TestEnum {
+    ENTRY_ONE = 0;
+    ENTRY_TWO = 1
+}
+
+message ComplexType {
+    uint32 foo = 1;
+    TestEnum bar = 2;
+}
+
+message OptionalComplexType {
+    oneof value {
+        ComplexType complex_value = 1;
+        // A field to represent `None`. It's usually left as an empty field.
+        Empty none = 2;
+    }
+}
+
+message OptionalString {
+    oneof value {
+        string name = 1;
+        // A field to represent `None`. It's usually left as an empty field.
+        Empty none = 2;
+    }
+}
+
+message RequestMessage {
+    repeated OptionalComplexType req;
+}
+
+message ResponseMessage {
+    repeated OptionalString resp = 1;
+}
+
+message Empty