Pants - Build System for Software Projects in a variety of Languages

Pants is a build system for software. It works particularly well for a source code workspace containing many distinct but interdependent pieces. It is optimizes for building multiple, dependent things from source, building code in a variety of languages, speed of build execution. A Pants build sees only the target it's building and the transitive dependencies of that target. This approach works well for a big repository containing several things.