The actual proto file compilation error is to shown in protoc tool

[daneshk]

Description:
When there is an issue when compiling the proto file using the Ballerina protoc tool, The actual error is not printed instead, it shows as,

Oct 05, 2024 7:25:17 PM io.ballerina.protoc.protobuf.cmd.GrpcCmd generateBalFile
SEVERE: An error occurred when generating the proto descriptor.
io.ballerina.protoc.protobuf.exception.CodeGeneratorException: Invalid command syntax. Stream closed
	at io.ballerina.protoc.protobuf.utils.BalFileGenerationUtils.handleProcessExecutionErrors(BalFileGenerationUtils.java:110)
	at io.ballerina.protoc.protobuf.utils.BalFileGenerationUtils.generateDescriptor(BalFileGenerationUtils.java:83)
	at io.ballerina.protoc.protobuf.cmd.DescriptorsGenerator.generateRootDescriptor(DescriptorsGenerator.java:148)
	at io.ballerina.protoc.protobuf.cmd.GrpcCmd.generateBalFile(GrpcCmd.java:251)
	at io.ballerina.protoc.protobuf.cmd.GrpcCmd.execute(GrpcCmd.java:165)
	at java.base/java.util.Optional.ifPresent(Optional.java:178)
	at io.ballerina.cli.launcher.Main.main(Main.java:59)
Caused by: java.io.IOException: Stream closed
	at java.base/java.io.BufferedInputStream.ensureOpen(BufferedInputStream.java:206)
	at java.base/java.io.BufferedInputStream.implRead(BufferedInputStream.java:411)
	at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:405)
	at java.base/sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:350)
	at java.base/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:393)
	at java.base/sun.nio.cs.StreamDecoder.lockedRead(StreamDecoder.java:217)
	at java.base/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:171)
	at java.base/java.io.InputStreamReader.read(InputStreamReader.java:188)
	at java.base/java.io.BufferedReader.fill(BufferedReader.java:160)
	at java.base/java.io.BufferedReader.implReadLine(BufferedReader.java:370)
	at java.base/java.io.BufferedReader.readLine(BufferedReader.java:347)
	at java.base/java.io.BufferedReader.readLine(BufferedReader.java:436)
	at io.ballerina.protoc.protobuf.utils.BalFileGenerationUtils.handleProcessExecutionErrors(BalFileGenerationUtils.java:105)
	... 6 more

From this stack trace, we can't get the actual error. This issue is to show the correct error.

[daneshk]

Steps to reproduce,

Create a proto file with syntax errors and use the Ballerina protoc tool[1] to generate the Ballerina source code.

1. https://ballerina.io/learn/grpc-tool/

[github-actions]

This issue is NOT closed with a proper Reason/ label. Make sure to add proper reason label before closing. Please add or leave a comment with the proper reason label now.

      - Reason/EngineeringMistake - The issue occurred due to a mistake made in the past.
      - Reason/Regression - The issue has introduced a regression.
      - Reason/MultipleComponentInteraction - Issue occured due to interactions in multiple components.
      - Reason/Complex - Issue occurred due to complex scenario.
      - Reason/Invalid - Issue is invalid.
      - Reason/Other - None of the above cases.