In which programming languages were the tools for automatic project building implemented?

Tools for automatic project building were implemented in various programming languages, depending on the era and platform. For example:

• Java — tools like Apache Ant and Maven are written in Java.
• Groovy — Gradle uses Groovy to describe build scripts.
• Python — tools like SCons and Buildbot are implemented in Python.
• Ruby — Rake is written in Ruby.
• C/C++ — classic Make and CMake have parts written in C/C++.

Thus, the choice of language depends on the goals, platform, and community for which the tool is created.