Nrthugu

I have this jenkins pipeline script (you should be able to just paste it directly into a blank pipeline build)

import hudson.console.LineTransformationOutputStream

import hudson.console.ConsoleLogFilter

import java.nio.charset.Charset

import java.nio.charset.StandardCharsets



class MyConsoleLogFilter extends ConsoleLogFilter {



    OutputStream decorateLogger(AbstractBuild build, OutputStream logger)

            throws IOException, InterruptedException {

        return new MyOutputStream(logger, StandardCharsets.UTF_8)

    }

}



class MyOutputStream extends LineTransformationOutputStream {

    def logger

    def charset



    MyOutputStream(OutputStream logger, Charset charset) {

        this.logger = logger

        this.charset = charset

    }



    void close() throws IOException {

        super.close();

        logger.close();

    }



    void eol(byte bytes, int len) throws IOException {

        String line = charset.decode(ByteBuffer.wrap(bytes, 0, len)).toString();

        logger.write("xxx ".getBytes(charset))

        logger.write(line.getBytes(charset));

    }

}



node {

    withContext(new MyConsoleLogFilter()) {

        echo 'Hello World'

    }

    echo 'Hello World'

}

I expect to see the first Hello World prefixed by xxx, because of the wrapping by MyConsoleLogFilter.

But all I see is greyed out console output as follows:

Started by user Admin

Running in Durability level: MAX_SURVIVABILITY

[Pipeline] node

Running on Jenkins in /var/jenkins_home/workspace/mike-learning

[Pipeline] {

[Pipeline] withContext

[Pipeline] {

[Pipeline] echo

[Pipeline] }

[Pipeline] // withContext

[Pipeline] echo

Hello World

[Pipeline] }

[Pipeline] // node

[Pipeline] End of Pipeline

Finished: SUCCESS

Why is the console output from within the withContext() block being hidden?

A colleague (Hibri Marzook) solved this for me. He pointed me towards https://issues.jenkins-ci.org/browse/JENKINS-53151 , which prompted me to do this:

import hudson.console.LineTransformationOutputStream

import hudson.console.ConsoleLogFilter

import java.nio.charset.Charset

import java.nio.charset.StandardCharsets



class MyConsoleLogFilter extends ConsoleLogFilter {

    @NonCPS

    OutputStream decorateLogger(AbstractBuild build, OutputStream logger)

            throws IOException, InterruptedException {

        return new MyOutputStream(logger, StandardCharsets.UTF_8)

    }

}



class MyOutputStream extends LineTransformationOutputStream {

    def logger

    def charset



    MyOutputStream(OutputStream logger, Charset charset) {

        this.logger = logger

        this.charset = charset

    }



    @NonCPS

    void close() throws IOException {

        super.close();

        logger.close();

    }



    @NonCPS

    void eol(byte bytes, int len) throws IOException {

        def line = charset.decode(java.nio.ByteBuffer.wrap(bytes, 0, len)).toString();

        logger.write("xxx ".getBytes(charset))

        logger.write(line.getBytes(charset));

    }

}



node {

    withContext(new MyConsoleLogFilter()) {

        echo 'Hello World'

    }

    echo 'Hello World'

}

and now it works.