We have explored many features of Gradle such as tasks, plugins, and dependency management. We have seen many examples of the build script involving in-built tasks, custom tasks, and dependencies between the tasks. Yet, we have not covered one of the main features of Gradle, which is Multi-Project Build. Until now we have seen build files for a single project. A single project build file represents only one project or one module. It is a very common scenario in any software world that it starts with a single module initially and as the software matures and grows over time, it turns into a big project. Then we need to divide it again into different submodules, but overall, we build the project using one file only. Gradle provides the capability of treating different modules as a different project, which can be grouped under a root project. It also gives the flexibility of building a submodule independently without building the complete project.

Multi-project is not a new...