Trying to support pipeline, can't read env vars or build result.

[Prabhas Gupte]

Hi, 

I am completely new to Jenkins plugin development, and have no prior experience with this.

I have a post-build action, which I am trying to support in pipeline. 

My class heading reads like this:

public class GetDataNotifier extends Notifier implements SimpleBuildStep {
...

I also have:

@Override
public void perform(@Nonnull Run<?, ?> run, @Nonnull FilePath filePath, @Nonnull Launcher launcher, @Nonnull TaskListener taskListener) throws InterruptedException, IOException {
...

In this perform method, I need to do this:

Check build result, and if it is successful, read a user defined env var named PACKAGE_ID and use it to make some external API call. 

To read the build result, I am trying this:

Result r = run.getResult();
String result = r.toString();
taskListener.getLogger().println("Build Result = " + result);

And, to get that PACKAGE_ID, I am trying this:

EnvVars envVars = run.getEnvironment(listener);
packageId = envVars.get("PACKAGE_ID", "");
taskListener.getLogger().println("PACKAGE_ID read from EnvVars is " + packageId);

My pipeline script is like this:

pipeline {
     environment { 
        PACKAGE_ID = 'coming_from_environment'
    }
    
    agent any
    stages {
        stage('Example') {
            steps {
                echo 'Hello World'
            }
        }
    }
    post { 
        always { 
            echo 'in post build stage'
            step([$class: 'GetDataNotifier', apiPass: 'password', apiServer: 'https://api.example.com', apiUser: 'user'])
        }
    }
}

However, I get neither Result r (its found to be null always), nor the env var PACKAGE_ID - it is never found. 

How can I that PACKAGE_ID at least? 

I have came across this link, but I am not sure how that can be done. 

I also referred this answer on another message in this group, but I still have no clue how I can get Step class that works with pipeline and what all things I need to do for that. 

According to this ticket, It seems EnvVars are not available to SimpleBuildStep, but then how that can be achieved in similarly simple way?

[Slide]

If the result is null, then you can consider it to be success.

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[Prabhas Gupte]

That is fine. I can ignore the result for now. But getting that PACKAGE_ID Env Var is my top-most priority at this moment. Any help in that direction would be appreciated. 

[Jesse Glick]

On Tue, Jul 11, 2017 at 10:34 AM, Prabhas Gupte <prabha...@gmail.com> wrote:
> read a user defined env var

Not possible: https://issues.jenkins-ci.org/browse/JENKINS-29144