Your First Declarative Pipeline

Part of the Jenkins course

Go back to the freestyle job you built in the last lesson and imagine six months have passed. The shell script grew from three lines to eighty. A teammate changed the build order last week and nobody noticed until a deploy broke, because the change was a few clicks in a browser, not a line in a diff. Nobody can tell you what the job looked like a month ago, because nothing about it was ever committed anywhere.

Before looking at any code, it helps to know that Jenkins actually understands two different pipeline syntaxes, both built on the same underlying language, Groovy, but shaped very differently. ...