Hi! I'm Szymon

Are you looking for an easy and fast way to convert a JSON file to a CSV one? In this blog post, I will show you how you can use jq command-line tool to do exactly that.

Do you know that you can unit test your Jenkins pipeline code? Have you ever used linter to validate the syntax of the Jenkinsfile? Do you use input step with a long timeout that blocks the executor and you don’t know how to improve? I answer those three questions (and two more) in the following YouTube video.

One of the most popular map-related operation in any programming language is merging two (or more) maps. In this short blog post, I explain how to do it in the Groovy programming language, starting from the simplest + operation, up to more advanced use cases of merging nested maps and using runtime metaprogramming to add a merge method to the Map interface. Enjoy reading and learning!

In this blog post, I show you how to build stackoverflow-cli - a command-line application that allows you to search Stack Overflow questions directly from the terminal window. I use Java 11+, Micronaut, Picocli, and GraalVM’s native-image.

In this blog post, I explain why you may want to use curl command in your Jenkinsfile, how to catch curl response and store it in a variable, as well as how to read HTTP response status code and extract some data from the JSON document. Enjoy!

Sticking to the process of achieving my goals has always been one of the most difficult obstacles to overcome, both on my way to becoming a better professional, and in my private life. I have found that in some areas I need to make an extraordinary amount of effort to keep myself on the right track, no matter how S.M.A.R.T. (Specific, Measurable, Achievable, Relevant, Time-based) my goals are. I couldn’t understand why in some cases I was able to make the desired progress, while in others I kept failing. Was it a matter of talent I was missing, or a skill I haven’t acquired yet? I have seen the dots, but I didn’t yet know how to connect them.

Have you ever wondered, what is the most convenient way to parse JSON data in the Unix/Linux command line? For instance, how to parse some information from the curl JSON response? Grep? No, thank you. There is a better tool for that. And it’s called jq.

The declarative Jenkins Pipeline allows us to define timeout either at the pipeline level or the specific stage. This feature prevents Jenkins’s job from getting stuck. However, in some cases, we want to accept that one stage may timeout, but we want to keep the remaining stages running.