Groovy
From Just Solve the File Format Problem
Groovy (or Apache Groovy) is not about '60s hippies or vinyl records, but is an open source programming language from the Apache Foundation that compiles to Java bytecode. It inherits most of its syntax from Java, but has a few additions, and some quirky terminology of its own; for instance, an interpolated string is called a "GString". Feelin' groovy!
The Jenkinsfile, used by the Jenkins system for automated building, testing, and deployment of software, has a syntax that is a variant of Groovy, Groovy Domain-Specific Language.